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securityos/node_modules/regl/lib/core.js

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var check = require('./util/check')
var extend = require('./util/extend')
var createEnvironment = require('./util/codegen')
var loop = require('./util/loop')
var isTypedArray = require('./util/is-typed-array')
var isNDArray = require('./util/is-ndarray')
var isArrayLike = require('./util/is-array-like')
var dynamic = require('./dynamic')
var primTypes = require('./constants/primitives.json')
var glTypes = require('./constants/dtypes.json')
// "cute" names for vector components
var CUTE_COMPONENTS = 'xyzw'.split('')
var GL_UNSIGNED_BYTE = 5121
var ATTRIB_STATE_POINTER = 1
var ATTRIB_STATE_CONSTANT = 2
var DYN_FUNC = 0
var DYN_PROP = 1
var DYN_CONTEXT = 2
var DYN_STATE = 3
var DYN_THUNK = 4
var DYN_CONSTANT = 5
var DYN_ARRAY = 6
var S_DITHER = 'dither'
var S_BLEND_ENABLE = 'blend.enable'
var S_BLEND_COLOR = 'blend.color'
var S_BLEND_EQUATION = 'blend.equation'
var S_BLEND_FUNC = 'blend.func'
var S_DEPTH_ENABLE = 'depth.enable'
var S_DEPTH_FUNC = 'depth.func'
var S_DEPTH_RANGE = 'depth.range'
var S_DEPTH_MASK = 'depth.mask'
var S_COLOR_MASK = 'colorMask'
var S_CULL_ENABLE = 'cull.enable'
var S_CULL_FACE = 'cull.face'
var S_FRONT_FACE = 'frontFace'
var S_LINE_WIDTH = 'lineWidth'
var S_POLYGON_OFFSET_ENABLE = 'polygonOffset.enable'
var S_POLYGON_OFFSET_OFFSET = 'polygonOffset.offset'
var S_SAMPLE_ALPHA = 'sample.alpha'
var S_SAMPLE_ENABLE = 'sample.enable'
var S_SAMPLE_COVERAGE = 'sample.coverage'
var S_STENCIL_ENABLE = 'stencil.enable'
var S_STENCIL_MASK = 'stencil.mask'
var S_STENCIL_FUNC = 'stencil.func'
var S_STENCIL_OPFRONT = 'stencil.opFront'
var S_STENCIL_OPBACK = 'stencil.opBack'
var S_SCISSOR_ENABLE = 'scissor.enable'
var S_SCISSOR_BOX = 'scissor.box'
var S_VIEWPORT = 'viewport'
var S_PROFILE = 'profile'
var S_FRAMEBUFFER = 'framebuffer'
var S_VERT = 'vert'
var S_FRAG = 'frag'
var S_ELEMENTS = 'elements'
var S_PRIMITIVE = 'primitive'
var S_COUNT = 'count'
var S_OFFSET = 'offset'
var S_INSTANCES = 'instances'
var S_VAO = 'vao'
var SUFFIX_WIDTH = 'Width'
var SUFFIX_HEIGHT = 'Height'
var S_FRAMEBUFFER_WIDTH = S_FRAMEBUFFER + SUFFIX_WIDTH
var S_FRAMEBUFFER_HEIGHT = S_FRAMEBUFFER + SUFFIX_HEIGHT
var S_VIEWPORT_WIDTH = S_VIEWPORT + SUFFIX_WIDTH
var S_VIEWPORT_HEIGHT = S_VIEWPORT + SUFFIX_HEIGHT
var S_DRAWINGBUFFER = 'drawingBuffer'
var S_DRAWINGBUFFER_WIDTH = S_DRAWINGBUFFER + SUFFIX_WIDTH
var S_DRAWINGBUFFER_HEIGHT = S_DRAWINGBUFFER + SUFFIX_HEIGHT
var NESTED_OPTIONS = [
S_BLEND_FUNC,
S_BLEND_EQUATION,
S_STENCIL_FUNC,
S_STENCIL_OPFRONT,
S_STENCIL_OPBACK,
S_SAMPLE_COVERAGE,
S_VIEWPORT,
S_SCISSOR_BOX,
S_POLYGON_OFFSET_OFFSET
]
var GL_ARRAY_BUFFER = 34962
var GL_ELEMENT_ARRAY_BUFFER = 34963
var GL_FRAGMENT_SHADER = 35632
var GL_VERTEX_SHADER = 35633
var GL_TEXTURE_2D = 0x0DE1
var GL_TEXTURE_CUBE_MAP = 0x8513
var GL_CULL_FACE = 0x0B44
var GL_BLEND = 0x0BE2
var GL_DITHER = 0x0BD0
var GL_STENCIL_TEST = 0x0B90
var GL_DEPTH_TEST = 0x0B71
var GL_SCISSOR_TEST = 0x0C11
var GL_POLYGON_OFFSET_FILL = 0x8037
var GL_SAMPLE_ALPHA_TO_COVERAGE = 0x809E
var GL_SAMPLE_COVERAGE = 0x80A0
var GL_FLOAT = 5126
var GL_FLOAT_VEC2 = 35664
var GL_FLOAT_VEC3 = 35665
var GL_FLOAT_VEC4 = 35666
var GL_INT = 5124
var GL_INT_VEC2 = 35667
var GL_INT_VEC3 = 35668
var GL_INT_VEC4 = 35669
var GL_BOOL = 35670
var GL_BOOL_VEC2 = 35671
var GL_BOOL_VEC3 = 35672
var GL_BOOL_VEC4 = 35673
var GL_FLOAT_MAT2 = 35674
var GL_FLOAT_MAT3 = 35675
var GL_FLOAT_MAT4 = 35676
var GL_SAMPLER_2D = 35678
var GL_SAMPLER_CUBE = 35680
var GL_TRIANGLES = 4
var GL_FRONT = 1028
var GL_BACK = 1029
var GL_CW = 0x0900
var GL_CCW = 0x0901
var GL_MIN_EXT = 0x8007
var GL_MAX_EXT = 0x8008
var GL_ALWAYS = 519
var GL_KEEP = 7680
var GL_ZERO = 0
var GL_ONE = 1
var GL_FUNC_ADD = 0x8006
var GL_LESS = 513
var GL_FRAMEBUFFER = 0x8D40
var GL_COLOR_ATTACHMENT0 = 0x8CE0
var blendFuncs = {
'0': 0,
'1': 1,
'zero': 0,
'one': 1,
'src color': 768,
'one minus src color': 769,
'src alpha': 770,
'one minus src alpha': 771,
'dst color': 774,
'one minus dst color': 775,
'dst alpha': 772,
'one minus dst alpha': 773,
'constant color': 32769,
'one minus constant color': 32770,
'constant alpha': 32771,
'one minus constant alpha': 32772,
'src alpha saturate': 776
}
// There are invalid values for srcRGB and dstRGB. See:
// https://www.khronos.org/registry/webgl/specs/1.0/#6.13
// https://github.com/KhronosGroup/WebGL/blob/0d3201f5f7ec3c0060bc1f04077461541f1987b9/conformance-suites/1.0.3/conformance/misc/webgl-specific.html#L56
var invalidBlendCombinations = [
'constant color, constant alpha',
'one minus constant color, constant alpha',
'constant color, one minus constant alpha',
'one minus constant color, one minus constant alpha',
'constant alpha, constant color',
'constant alpha, one minus constant color',
'one minus constant alpha, constant color',
'one minus constant alpha, one minus constant color'
]
var compareFuncs = {
'never': 512,
'less': 513,
'<': 513,
'equal': 514,
'=': 514,
'==': 514,
'===': 514,
'lequal': 515,
'<=': 515,
'greater': 516,
'>': 516,
'notequal': 517,
'!=': 517,
'!==': 517,
'gequal': 518,
'>=': 518,
'always': 519
}
var stencilOps = {
'0': 0,
'zero': 0,
'keep': 7680,
'replace': 7681,
'increment': 7682,
'decrement': 7683,
'increment wrap': 34055,
'decrement wrap': 34056,
'invert': 5386
}
var shaderType = {
'frag': GL_FRAGMENT_SHADER,
'vert': GL_VERTEX_SHADER
}
var orientationType = {
'cw': GL_CW,
'ccw': GL_CCW
}
function isBufferArgs (x) {
return Array.isArray(x) ||
isTypedArray(x) ||
isNDArray(x)
}
// Make sure viewport is processed first
function sortState (state) {
return state.sort(function (a, b) {
if (a === S_VIEWPORT) {
return -1
} else if (b === S_VIEWPORT) {
return 1
}
return (a < b) ? -1 : 1
})
}
function Declaration (thisDep, contextDep, propDep, append) {
this.thisDep = thisDep
this.contextDep = contextDep
this.propDep = propDep
this.append = append
}
function isStatic (decl) {
return decl && !(decl.thisDep || decl.contextDep || decl.propDep)
}
function createStaticDecl (append) {
return new Declaration(false, false, false, append)
}
function createDynamicDecl (dyn, append) {
var type = dyn.type
if (type === DYN_FUNC) {
var numArgs = dyn.data.length
return new Declaration(
true,
numArgs >= 1,
numArgs >= 2,
append)
} else if (type === DYN_THUNK) {
var data = dyn.data
return new Declaration(
data.thisDep,
data.contextDep,
data.propDep,
append)
} else if (type === DYN_CONSTANT) {
return new Declaration(
false,
false,
false,
append)
} else if (type === DYN_ARRAY) {
var thisDep = false
var contextDep = false
var propDep = false
for (var i = 0; i < dyn.data.length; ++i) {
var subDyn = dyn.data[i]
if (subDyn.type === DYN_PROP) {
propDep = true
} else if (subDyn.type === DYN_CONTEXT) {
contextDep = true
} else if (subDyn.type === DYN_STATE) {
thisDep = true
} else if (subDyn.type === DYN_FUNC) {
thisDep = true
var subArgs = subDyn.data
if (subArgs >= 1) {
contextDep = true
}
if (subArgs >= 2) {
propDep = true
}
} else if (subDyn.type === DYN_THUNK) {
thisDep = thisDep || subDyn.data.thisDep
contextDep = contextDep || subDyn.data.contextDep
propDep = propDep || subDyn.data.propDep
}
}
return new Declaration(
thisDep,
contextDep,
propDep,
append)
} else {
return new Declaration(
type === DYN_STATE,
type === DYN_CONTEXT,
type === DYN_PROP,
append)
}
}
var SCOPE_DECL = new Declaration(false, false, false, function () {})
module.exports = function reglCore (
gl,
stringStore,
extensions,
limits,
bufferState,
elementState,
textureState,
framebufferState,
uniformState,
attributeState,
shaderState,
drawState,
contextState,
timer,
config) {
var AttributeRecord = attributeState.Record
var blendEquations = {
'add': 32774,
'subtract': 32778,
'reverse subtract': 32779
}
if (extensions.ext_blend_minmax) {
blendEquations.min = GL_MIN_EXT
blendEquations.max = GL_MAX_EXT
}
var extInstancing = extensions.angle_instanced_arrays
var extDrawBuffers = extensions.webgl_draw_buffers
var extVertexArrays = extensions.oes_vertex_array_object
// ===================================================
// ===================================================
// WEBGL STATE
// ===================================================
// ===================================================
var currentState = {
dirty: true,
profile: config.profile
}
var nextState = {}
var GL_STATE_NAMES = []
var GL_FLAGS = {}
var GL_VARIABLES = {}
function propName (name) {
return name.replace('.', '_')
}
function stateFlag (sname, cap, init) {
var name = propName(sname)
GL_STATE_NAMES.push(sname)
nextState[name] = currentState[name] = !!init
GL_FLAGS[name] = cap
}
function stateVariable (sname, func, init) {
var name = propName(sname)
GL_STATE_NAMES.push(sname)
if (Array.isArray(init)) {
currentState[name] = init.slice()
nextState[name] = init.slice()
} else {
currentState[name] = nextState[name] = init
}
GL_VARIABLES[name] = func
}
// Dithering
stateFlag(S_DITHER, GL_DITHER)
// Blending
stateFlag(S_BLEND_ENABLE, GL_BLEND)
stateVariable(S_BLEND_COLOR, 'blendColor', [0, 0, 0, 0])
stateVariable(S_BLEND_EQUATION, 'blendEquationSeparate',
[GL_FUNC_ADD, GL_FUNC_ADD])
stateVariable(S_BLEND_FUNC, 'blendFuncSeparate',
[GL_ONE, GL_ZERO, GL_ONE, GL_ZERO])
// Depth
stateFlag(S_DEPTH_ENABLE, GL_DEPTH_TEST, true)
stateVariable(S_DEPTH_FUNC, 'depthFunc', GL_LESS)
stateVariable(S_DEPTH_RANGE, 'depthRange', [0, 1])
stateVariable(S_DEPTH_MASK, 'depthMask', true)
// Color mask
stateVariable(S_COLOR_MASK, S_COLOR_MASK, [true, true, true, true])
// Face culling
stateFlag(S_CULL_ENABLE, GL_CULL_FACE)
stateVariable(S_CULL_FACE, 'cullFace', GL_BACK)
// Front face orientation
stateVariable(S_FRONT_FACE, S_FRONT_FACE, GL_CCW)
// Line width
stateVariable(S_LINE_WIDTH, S_LINE_WIDTH, 1)
// Polygon offset
stateFlag(S_POLYGON_OFFSET_ENABLE, GL_POLYGON_OFFSET_FILL)
stateVariable(S_POLYGON_OFFSET_OFFSET, 'polygonOffset', [0, 0])
// Sample coverage
stateFlag(S_SAMPLE_ALPHA, GL_SAMPLE_ALPHA_TO_COVERAGE)
stateFlag(S_SAMPLE_ENABLE, GL_SAMPLE_COVERAGE)
stateVariable(S_SAMPLE_COVERAGE, 'sampleCoverage', [1, false])
// Stencil
stateFlag(S_STENCIL_ENABLE, GL_STENCIL_TEST)
stateVariable(S_STENCIL_MASK, 'stencilMask', -1)
stateVariable(S_STENCIL_FUNC, 'stencilFunc', [GL_ALWAYS, 0, -1])
stateVariable(S_STENCIL_OPFRONT, 'stencilOpSeparate',
[GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP])
stateVariable(S_STENCIL_OPBACK, 'stencilOpSeparate',
[GL_BACK, GL_KEEP, GL_KEEP, GL_KEEP])
// Scissor
stateFlag(S_SCISSOR_ENABLE, GL_SCISSOR_TEST)
stateVariable(S_SCISSOR_BOX, 'scissor',
[0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])
// Viewport
stateVariable(S_VIEWPORT, S_VIEWPORT,
[0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])
// ===================================================
// ===================================================
// ENVIRONMENT
// ===================================================
// ===================================================
var sharedState = {
gl: gl,
context: contextState,
strings: stringStore,
next: nextState,
current: currentState,
draw: drawState,
elements: elementState,
buffer: bufferState,
shader: shaderState,
attributes: attributeState.state,
vao: attributeState,
uniforms: uniformState,
framebuffer: framebufferState,
extensions: extensions,
timer: timer,
isBufferArgs: isBufferArgs
}
var sharedConstants = {
primTypes: primTypes,
compareFuncs: compareFuncs,
blendFuncs: blendFuncs,
blendEquations: blendEquations,
stencilOps: stencilOps,
glTypes: glTypes,
orientationType: orientationType
}
check.optional(function () {
sharedState.isArrayLike = isArrayLike
})
if (extDrawBuffers) {
sharedConstants.backBuffer = [GL_BACK]
sharedConstants.drawBuffer = loop(limits.maxDrawbuffers, function (i) {
if (i === 0) {
return [0]
}
return loop(i, function (j) {
return GL_COLOR_ATTACHMENT0 + j
})
})
}
var drawCallCounter = 0
function createREGLEnvironment () {
var env = createEnvironment()
var link = env.link
var global = env.global
env.id = drawCallCounter++
env.batchId = '0'
// link shared state
var SHARED = link(sharedState)
var shared = env.shared = {
props: 'a0'
}
Object.keys(sharedState).forEach(function (prop) {
shared[prop] = global.def(SHARED, '.', prop)
})
// Inject runtime assertion stuff for debug builds
check.optional(function () {
env.CHECK = link(check)
env.commandStr = check.guessCommand()
env.command = link(env.commandStr)
env.assert = function (block, pred, message) {
block(
'if(!(', pred, '))',
this.CHECK, '.commandRaise(', link(message), ',', this.command, ');')
}
sharedConstants.invalidBlendCombinations = invalidBlendCombinations
})
// Copy GL state variables over
var nextVars = env.next = {}
var currentVars = env.current = {}
Object.keys(GL_VARIABLES).forEach(function (variable) {
if (Array.isArray(currentState[variable])) {
nextVars[variable] = global.def(shared.next, '.', variable)
currentVars[variable] = global.def(shared.current, '.', variable)
}
})
// Initialize shared constants
var constants = env.constants = {}
Object.keys(sharedConstants).forEach(function (name) {
constants[name] = global.def(JSON.stringify(sharedConstants[name]))
})
// Helper function for calling a block
env.invoke = function (block, x) {
switch (x.type) {
case DYN_FUNC:
var argList = [
'this',
shared.context,
shared.props,
env.batchId
]
return block.def(
link(x.data), '.call(',
argList.slice(0, Math.max(x.data.length + 1, 4)),
')')
case DYN_PROP:
return block.def(shared.props, x.data)
case DYN_CONTEXT:
return block.def(shared.context, x.data)
case DYN_STATE:
return block.def('this', x.data)
case DYN_THUNK:
x.data.append(env, block)
return x.data.ref
case DYN_CONSTANT:
return x.data.toString()
case DYN_ARRAY:
return x.data.map(function (y) {
return env.invoke(block, y)
})
}
}
env.attribCache = {}
var scopeAttribs = {}
env.scopeAttrib = function (name) {
var id = stringStore.id(name)
if (id in scopeAttribs) {
return scopeAttribs[id]
}
var binding = attributeState.scope[id]
if (!binding) {
binding = attributeState.scope[id] = new AttributeRecord()
}
var result = scopeAttribs[id] = link(binding)
return result
}
return env
}
// ===================================================
// ===================================================
// PARSING
// ===================================================
// ===================================================
function parseProfile (options) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
var profileEnable
if (S_PROFILE in staticOptions) {
var value = !!staticOptions[S_PROFILE]
profileEnable = createStaticDecl(function (env, scope) {
return value
})
profileEnable.enable = value
} else if (S_PROFILE in dynamicOptions) {
var dyn = dynamicOptions[S_PROFILE]
profileEnable = createDynamicDecl(dyn, function (env, scope) {
return env.invoke(scope, dyn)
})
}
return profileEnable
}
function parseFramebuffer (options, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
if (S_FRAMEBUFFER in staticOptions) {
var framebuffer = staticOptions[S_FRAMEBUFFER]
if (framebuffer) {
framebuffer = framebufferState.getFramebuffer(framebuffer)
check.command(framebuffer, 'invalid framebuffer object')
return createStaticDecl(function (env, block) {
var FRAMEBUFFER = env.link(framebuffer)
var shared = env.shared
block.set(
shared.framebuffer,
'.next',
FRAMEBUFFER)
var CONTEXT = shared.context
block.set(
CONTEXT,
'.' + S_FRAMEBUFFER_WIDTH,
FRAMEBUFFER + '.width')
block.set(
CONTEXT,
'.' + S_FRAMEBUFFER_HEIGHT,
FRAMEBUFFER + '.height')
return FRAMEBUFFER
})
} else {
return createStaticDecl(function (env, scope) {
var shared = env.shared
scope.set(
shared.framebuffer,
'.next',
'null')
var CONTEXT = shared.context
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_WIDTH,
CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_HEIGHT,
CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)
return 'null'
})
}
} else if (S_FRAMEBUFFER in dynamicOptions) {
var dyn = dynamicOptions[S_FRAMEBUFFER]
return createDynamicDecl(dyn, function (env, scope) {
var FRAMEBUFFER_FUNC = env.invoke(scope, dyn)
var shared = env.shared
var FRAMEBUFFER_STATE = shared.framebuffer
var FRAMEBUFFER = scope.def(
FRAMEBUFFER_STATE, '.getFramebuffer(', FRAMEBUFFER_FUNC, ')')
check.optional(function () {
env.assert(scope,
'!' + FRAMEBUFFER_FUNC + '||' + FRAMEBUFFER,
'invalid framebuffer object')
})
scope.set(
FRAMEBUFFER_STATE,
'.next',
FRAMEBUFFER)
var CONTEXT = shared.context
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_WIDTH,
FRAMEBUFFER + '?' + FRAMEBUFFER + '.width:' +
CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_HEIGHT,
FRAMEBUFFER +
'?' + FRAMEBUFFER + '.height:' +
CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)
return FRAMEBUFFER
})
} else {
return null
}
}
function parseViewportScissor (options, framebuffer, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
function parseBox (param) {
if (param in staticOptions) {
var box = staticOptions[param]
check.commandType(box, 'object', 'invalid ' + param, env.commandStr)
var isStatic = true
var x = box.x | 0
var y = box.y | 0
var w, h
if ('width' in box) {
w = box.width | 0
check.command(w >= 0, 'invalid ' + param, env.commandStr)
} else {
isStatic = false
}
if ('height' in box) {
h = box.height | 0
check.command(h >= 0, 'invalid ' + param, env.commandStr)
} else {
isStatic = false
}
return new Declaration(
!isStatic && framebuffer && framebuffer.thisDep,
!isStatic && framebuffer && framebuffer.contextDep,
!isStatic && framebuffer && framebuffer.propDep,
function (env, scope) {
var CONTEXT = env.shared.context
var BOX_W = w
if (!('width' in box)) {
BOX_W = scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', x)
}
var BOX_H = h
if (!('height' in box)) {
BOX_H = scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', y)
}
return [x, y, BOX_W, BOX_H]
})
} else if (param in dynamicOptions) {
var dynBox = dynamicOptions[param]
var result = createDynamicDecl(dynBox, function (env, scope) {
var BOX = env.invoke(scope, dynBox)
check.optional(function () {
env.assert(scope,
BOX + '&&typeof ' + BOX + '==="object"',
'invalid ' + param)
})
var CONTEXT = env.shared.context
var BOX_X = scope.def(BOX, '.x|0')
var BOX_Y = scope.def(BOX, '.y|0')
var BOX_W = scope.def(
'"width" in ', BOX, '?', BOX, '.width|0:',
'(', CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', BOX_X, ')')
var BOX_H = scope.def(
'"height" in ', BOX, '?', BOX, '.height|0:',
'(', CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', BOX_Y, ')')
check.optional(function () {
env.assert(scope,
BOX_W + '>=0&&' +
BOX_H + '>=0',
'invalid ' + param)
})
return [BOX_X, BOX_Y, BOX_W, BOX_H]
})
if (framebuffer) {
result.thisDep = result.thisDep || framebuffer.thisDep
result.contextDep = result.contextDep || framebuffer.contextDep
result.propDep = result.propDep || framebuffer.propDep
}
return result
} else if (framebuffer) {
return new Declaration(
framebuffer.thisDep,
framebuffer.contextDep,
framebuffer.propDep,
function (env, scope) {
var CONTEXT = env.shared.context
return [
0, 0,
scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH),
scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT)]
})
} else {
return null
}
}
var viewport = parseBox(S_VIEWPORT)
if (viewport) {
var prevViewport = viewport
viewport = new Declaration(
viewport.thisDep,
viewport.contextDep,
viewport.propDep,
function (env, scope) {
var VIEWPORT = prevViewport.append(env, scope)
var CONTEXT = env.shared.context
scope.set(
CONTEXT,
'.' + S_VIEWPORT_WIDTH,
VIEWPORT[2])
scope.set(
CONTEXT,
'.' + S_VIEWPORT_HEIGHT,
VIEWPORT[3])
return VIEWPORT
})
}
return {
viewport: viewport,
scissor_box: parseBox(S_SCISSOR_BOX)
}
}
function parseAttribLocations (options, attributes) {
var staticOptions = options.static
var staticProgram =
typeof staticOptions[S_FRAG] === 'string' &&
typeof staticOptions[S_VERT] === 'string'
if (staticProgram) {
if (Object.keys(attributes.dynamic).length > 0) {
return null
}
var staticAttributes = attributes.static
var sAttributes = Object.keys(staticAttributes)
if (sAttributes.length > 0 && typeof staticAttributes[sAttributes[0]] === 'number') {
var bindings = []
for (var i = 0; i < sAttributes.length; ++i) {
check(typeof staticAttributes[sAttributes[i]] === 'number', 'must specify all vertex attribute locations when using vaos')
bindings.push([staticAttributes[sAttributes[i]] | 0, sAttributes[i]])
}
return bindings
}
}
return null
}
function parseProgram (options, env, attribLocations) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
function parseShader (name) {
if (name in staticOptions) {
var id = stringStore.id(staticOptions[name])
check.optional(function () {
shaderState.shader(shaderType[name], id, check.guessCommand())
})
var result = createStaticDecl(function () {
return id
})
result.id = id
return result
} else if (name in dynamicOptions) {
var dyn = dynamicOptions[name]
return createDynamicDecl(dyn, function (env, scope) {
var str = env.invoke(scope, dyn)
var id = scope.def(env.shared.strings, '.id(', str, ')')
check.optional(function () {
scope(
env.shared.shader, '.shader(',
shaderType[name], ',',
id, ',',
env.command, ');')
})
return id
})
}
return null
}
var frag = parseShader(S_FRAG)
var vert = parseShader(S_VERT)
var program = null
var progVar
if (isStatic(frag) && isStatic(vert)) {
program = shaderState.program(vert.id, frag.id, null, attribLocations)
progVar = createStaticDecl(function (env, scope) {
return env.link(program)
})
} else {
progVar = new Declaration(
(frag && frag.thisDep) || (vert && vert.thisDep),
(frag && frag.contextDep) || (vert && vert.contextDep),
(frag && frag.propDep) || (vert && vert.propDep),
function (env, scope) {
var SHADER_STATE = env.shared.shader
var fragId
if (frag) {
fragId = frag.append(env, scope)
} else {
fragId = scope.def(SHADER_STATE, '.', S_FRAG)
}
var vertId
if (vert) {
vertId = vert.append(env, scope)
} else {
vertId = scope.def(SHADER_STATE, '.', S_VERT)
}
var progDef = SHADER_STATE + '.program(' + vertId + ',' + fragId
check.optional(function () {
progDef += ',' + env.command
})
return scope.def(progDef + ')')
})
}
return {
frag: frag,
vert: vert,
progVar: progVar,
program: program
}
}
function parseDraw (options, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
// TODO: should use VAO to get default values for offset properties
// should move vao parse into here and out of the old stuff
var staticDraw = {}
var vaoActive = false
function parseVAO () {
if (S_VAO in staticOptions) {
var vao = staticOptions[S_VAO]
if (vao !== null && attributeState.getVAO(vao) === null) {
vao = attributeState.createVAO(vao)
}
vaoActive = true
staticDraw.vao = vao
return createStaticDecl(function (env) {
var vaoRef = attributeState.getVAO(vao)
if (vaoRef) {
return env.link(vaoRef)
} else {
return 'null'
}
})
} else if (S_VAO in dynamicOptions) {
vaoActive = true
var dyn = dynamicOptions[S_VAO]
return createDynamicDecl(dyn, function (env, scope) {
var vaoRef = env.invoke(scope, dyn)
return scope.def(env.shared.vao + '.getVAO(' + vaoRef + ')')
})
}
return null
}
var vao = parseVAO()
var elementsActive = false
function parseElements () {
if (S_ELEMENTS in staticOptions) {
var elements = staticOptions[S_ELEMENTS]
staticDraw.elements = elements
if (isBufferArgs(elements)) {
var e = staticDraw.elements = elementState.create(elements, true)
elements = elementState.getElements(e)
elementsActive = true
} else if (elements) {
elements = elementState.getElements(elements)
elementsActive = true
check.command(elements, 'invalid elements', env.commandStr)
}
var result = createStaticDecl(function (env, scope) {
if (elements) {
var result = env.link(elements)
env.ELEMENTS = result
return result
}
env.ELEMENTS = null
return null
})
result.value = elements
return result
} else if (S_ELEMENTS in dynamicOptions) {
elementsActive = true
var dyn = dynamicOptions[S_ELEMENTS]
return createDynamicDecl(dyn, function (env, scope) {
var shared = env.shared
var IS_BUFFER_ARGS = shared.isBufferArgs
var ELEMENT_STATE = shared.elements
var elementDefn = env.invoke(scope, dyn)
var elements = scope.def('null')
var elementStream = scope.def(IS_BUFFER_ARGS, '(', elementDefn, ')')
var ifte = env.cond(elementStream)
.then(elements, '=', ELEMENT_STATE, '.createStream(', elementDefn, ');')
.else(elements, '=', ELEMENT_STATE, '.getElements(', elementDefn, ');')
check.optional(function () {
env.assert(ifte.else,
'!' + elementDefn + '||' + elements,
'invalid elements')
})
scope.entry(ifte)
scope.exit(
env.cond(elementStream)
.then(ELEMENT_STATE, '.destroyStream(', elements, ');'))
env.ELEMENTS = elements
return elements
})
} else if (vaoActive) {
return new Declaration(
vao.thisDep,
vao.contextDep,
vao.propDep,
function (env, scope) {
return scope.def(env.shared.vao + '.currentVAO?' + env.shared.elements + '.getElements(' + env.shared.vao + '.currentVAO.elements):null')
})
}
return null
}
var elements = parseElements()
function parsePrimitive () {
if (S_PRIMITIVE in staticOptions) {
var primitive = staticOptions[S_PRIMITIVE]
staticDraw.primitive = primitive
check.commandParameter(primitive, primTypes, 'invalid primitve', env.commandStr)
return createStaticDecl(function (env, scope) {
return primTypes[primitive]
})
} else if (S_PRIMITIVE in dynamicOptions) {
var dynPrimitive = dynamicOptions[S_PRIMITIVE]
return createDynamicDecl(dynPrimitive, function (env, scope) {
var PRIM_TYPES = env.constants.primTypes
var prim = env.invoke(scope, dynPrimitive)
check.optional(function () {
env.assert(scope,
prim + ' in ' + PRIM_TYPES,
'invalid primitive, must be one of ' + Object.keys(primTypes))
})
return scope.def(PRIM_TYPES, '[', prim, ']')
})
} else if (elementsActive) {
if (isStatic(elements)) {
if (elements.value) {
return createStaticDecl(function (env, scope) {
return scope.def(env.ELEMENTS, '.primType')
})
} else {
return createStaticDecl(function () {
return GL_TRIANGLES
})
}
} else {
return new Declaration(
elements.thisDep,
elements.contextDep,
elements.propDep,
function (env, scope) {
var elements = env.ELEMENTS
return scope.def(elements, '?', elements, '.primType:', GL_TRIANGLES)
})
}
} else if (vaoActive) {
return new Declaration(
vao.thisDep,
vao.contextDep,
vao.propDep,
function (env, scope) {
return scope.def(env.shared.vao + '.currentVAO?' + env.shared.vao + '.currentVAO.primitive:' + GL_TRIANGLES)
})
}
return null
}
function parseParam (param, isOffset) {
if (param in staticOptions) {
var value = staticOptions[param] | 0
if (isOffset) {
staticDraw.offset = value
} else {
staticDraw.instances = value
}
check.command(!isOffset || value >= 0, 'invalid ' + param, env.commandStr)
return createStaticDecl(function (env, scope) {
if (isOffset) {
env.OFFSET = value
}
return value
})
} else if (param in dynamicOptions) {
var dynValue = dynamicOptions[param]
return createDynamicDecl(dynValue, function (env, scope) {
var result = env.invoke(scope, dynValue)
if (isOffset) {
env.OFFSET = result
check.optional(function () {
env.assert(scope,
result + '>=0',
'invalid ' + param)
})
}
return result
})
} else if (isOffset) {
if (elementsActive) {
return createStaticDecl(function (env, scope) {
env.OFFSET = 0
return 0
})
} else if (vaoActive) {
return new Declaration(
vao.thisDep,
vao.contextDep,
vao.propDep,
function (env, scope) {
return scope.def(env.shared.vao + '.currentVAO?' + env.shared.vao + '.currentVAO.offset:0')
})
}
} else if (vaoActive) {
return new Declaration(
vao.thisDep,
vao.contextDep,
vao.propDep,
function (env, scope) {
return scope.def(env.shared.vao + '.currentVAO?' + env.shared.vao + '.currentVAO.instances:-1')
})
}
return null
}
var OFFSET = parseParam(S_OFFSET, true)
function parseVertCount () {
if (S_COUNT in staticOptions) {
var count = staticOptions[S_COUNT] | 0
staticDraw.count = count
check.command(
typeof count === 'number' && count >= 0, 'invalid vertex count', env.commandStr)
return createStaticDecl(function () {
return count
})
} else if (S_COUNT in dynamicOptions) {
var dynCount = dynamicOptions[S_COUNT]
return createDynamicDecl(dynCount, function (env, scope) {
var result = env.invoke(scope, dynCount)
check.optional(function () {
env.assert(scope,
'typeof ' + result + '==="number"&&' +
result + '>=0&&' +
result + '===(' + result + '|0)',
'invalid vertex count')
})
return result
})
} else if (elementsActive) {
if (isStatic(elements)) {
if (elements) {
if (OFFSET) {
return new Declaration(
OFFSET.thisDep,
OFFSET.contextDep,
OFFSET.propDep,
function (env, scope) {
var result = scope.def(
env.ELEMENTS, '.vertCount-', env.OFFSET)
check.optional(function () {
env.assert(scope,
result + '>=0',
'invalid vertex offset/element buffer too small')
})
return result
})
} else {
return createStaticDecl(function (env, scope) {
return scope.def(env.ELEMENTS, '.vertCount')
})
}
} else {
var result = createStaticDecl(function () {
return -1
})
check.optional(function () {
result.MISSING = true
})
return result
}
} else {
var variable = new Declaration(
elements.thisDep || OFFSET.thisDep,
elements.contextDep || OFFSET.contextDep,
elements.propDep || OFFSET.propDep,
function (env, scope) {
var elements = env.ELEMENTS
if (env.OFFSET) {
return scope.def(elements, '?', elements, '.vertCount-',
env.OFFSET, ':-1')
}
return scope.def(elements, '?', elements, '.vertCount:-1')
})
check.optional(function () {
variable.DYNAMIC = true
})
return variable
}
} else if (vaoActive) {
var countVariable = new Declaration(
vao.thisDep,
vao.contextDep,
vao.propDep,
function (env, scope) {
return scope.def(env.shared.vao, '.currentVAO?', env.shared.vao, '.currentVAO.count:-1')
})
return countVariable
}
return null
}
var primitive = parsePrimitive()
var count = parseVertCount()
var instances = parseParam(S_INSTANCES, false)
return {
elements: elements,
primitive: primitive,
count: count,
instances: instances,
offset: OFFSET,
vao: vao,
vaoActive: vaoActive,
elementsActive: elementsActive,
// static draw props
static: staticDraw
}
}
function parseGLState (options, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
var STATE = {}
GL_STATE_NAMES.forEach(function (prop) {
var param = propName(prop)
function parseParam (parseStatic, parseDynamic) {
if (prop in staticOptions) {
var value = parseStatic(staticOptions[prop])
STATE[param] = createStaticDecl(function () {
return value
})
} else if (prop in dynamicOptions) {
var dyn = dynamicOptions[prop]
STATE[param] = createDynamicDecl(dyn, function (env, scope) {
return parseDynamic(env, scope, env.invoke(scope, dyn))
})
}
}
switch (prop) {
case S_CULL_ENABLE:
case S_BLEND_ENABLE:
case S_DITHER:
case S_STENCIL_ENABLE:
case S_DEPTH_ENABLE:
case S_SCISSOR_ENABLE:
case S_POLYGON_OFFSET_ENABLE:
case S_SAMPLE_ALPHA:
case S_SAMPLE_ENABLE:
case S_DEPTH_MASK:
return parseParam(
function (value) {
check.commandType(value, 'boolean', prop, env.commandStr)
return value
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
'typeof ' + value + '==="boolean"',
'invalid flag ' + prop, env.commandStr)
})
return value
})
case S_DEPTH_FUNC:
return parseParam(
function (value) {
check.commandParameter(value, compareFuncs, 'invalid ' + prop, env.commandStr)
return compareFuncs[value]
},
function (env, scope, value) {
var COMPARE_FUNCS = env.constants.compareFuncs
check.optional(function () {
env.assert(scope,
value + ' in ' + COMPARE_FUNCS,
'invalid ' + prop + ', must be one of ' + Object.keys(compareFuncs))
})
return scope.def(COMPARE_FUNCS, '[', value, ']')
})
case S_DEPTH_RANGE:
return parseParam(
function (value) {
check.command(
isArrayLike(value) &&
value.length === 2 &&
typeof value[0] === 'number' &&
typeof value[1] === 'number' &&
value[0] <= value[1],
'depth range is 2d array',
env.commandStr)
return value
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
env.shared.isArrayLike + '(' + value + ')&&' +
value + '.length===2&&' +
'typeof ' + value + '[0]==="number"&&' +
'typeof ' + value + '[1]==="number"&&' +
value + '[0]<=' + value + '[1]',
'depth range must be a 2d array')
})
var Z_NEAR = scope.def('+', value, '[0]')
var Z_FAR = scope.def('+', value, '[1]')
return [Z_NEAR, Z_FAR]
})
case S_BLEND_FUNC:
return parseParam(
function (value) {
check.commandType(value, 'object', 'blend.func', env.commandStr)
var srcRGB = ('srcRGB' in value ? value.srcRGB : value.src)
var srcAlpha = ('srcAlpha' in value ? value.srcAlpha : value.src)
var dstRGB = ('dstRGB' in value ? value.dstRGB : value.dst)
var dstAlpha = ('dstAlpha' in value ? value.dstAlpha : value.dst)
check.commandParameter(srcRGB, blendFuncs, param + '.srcRGB', env.commandStr)
check.commandParameter(srcAlpha, blendFuncs, param + '.srcAlpha', env.commandStr)
check.commandParameter(dstRGB, blendFuncs, param + '.dstRGB', env.commandStr)
check.commandParameter(dstAlpha, blendFuncs, param + '.dstAlpha', env.commandStr)
check.command(
(invalidBlendCombinations.indexOf(srcRGB + ', ' + dstRGB) === -1),
'unallowed blending combination (srcRGB, dstRGB) = (' + srcRGB + ', ' + dstRGB + ')', env.commandStr)
return [
blendFuncs[srcRGB],
blendFuncs[dstRGB],
blendFuncs[srcAlpha],
blendFuncs[dstAlpha]
]
},
function (env, scope, value) {
var BLEND_FUNCS = env.constants.blendFuncs
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid blend func, must be an object')
})
function read (prefix, suffix) {
var func = scope.def(
'"', prefix, suffix, '" in ', value,
'?', value, '.', prefix, suffix,
':', value, '.', prefix)
check.optional(function () {
env.assert(scope,
func + ' in ' + BLEND_FUNCS,
'invalid ' + prop + '.' + prefix + suffix + ', must be one of ' + Object.keys(blendFuncs))
})
return func
}
var srcRGB = read('src', 'RGB')
var dstRGB = read('dst', 'RGB')
check.optional(function () {
var INVALID_BLEND_COMBINATIONS = env.constants.invalidBlendCombinations
env.assert(scope,
INVALID_BLEND_COMBINATIONS +
'.indexOf(' + srcRGB + '+", "+' + dstRGB + ') === -1 ',
'unallowed blending combination for (srcRGB, dstRGB)'
)
})
var SRC_RGB = scope.def(BLEND_FUNCS, '[', srcRGB, ']')
var SRC_ALPHA = scope.def(BLEND_FUNCS, '[', read('src', 'Alpha'), ']')
var DST_RGB = scope.def(BLEND_FUNCS, '[', dstRGB, ']')
var DST_ALPHA = scope.def(BLEND_FUNCS, '[', read('dst', 'Alpha'), ']')
return [SRC_RGB, DST_RGB, SRC_ALPHA, DST_ALPHA]
})
case S_BLEND_EQUATION:
return parseParam(
function (value) {
if (typeof value === 'string') {
check.commandParameter(value, blendEquations, 'invalid ' + prop, env.commandStr)
return [
blendEquations[value],
blendEquations[value]
]
} else if (typeof value === 'object') {
check.commandParameter(
value.rgb, blendEquations, prop + '.rgb', env.commandStr)
check.commandParameter(
value.alpha, blendEquations, prop + '.alpha', env.commandStr)
return [
blendEquations[value.rgb],
blendEquations[value.alpha]
]
} else {
check.commandRaise('invalid blend.equation', env.commandStr)
}
},
function (env, scope, value) {
var BLEND_EQUATIONS = env.constants.blendEquations
var RGB = scope.def()
var ALPHA = scope.def()
var ifte = env.cond('typeof ', value, '==="string"')
check.optional(function () {
function checkProp (block, name, value) {
env.assert(block,
value + ' in ' + BLEND_EQUATIONS,
'invalid ' + name + ', must be one of ' + Object.keys(blendEquations))
}
checkProp(ifte.then, prop, value)
env.assert(ifte.else,
value + '&&typeof ' + value + '==="object"',
'invalid ' + prop)
checkProp(ifte.else, prop + '.rgb', value + '.rgb')
checkProp(ifte.else, prop + '.alpha', value + '.alpha')
})
ifte.then(
RGB, '=', ALPHA, '=', BLEND_EQUATIONS, '[', value, '];')
ifte.else(
RGB, '=', BLEND_EQUATIONS, '[', value, '.rgb];',
ALPHA, '=', BLEND_EQUATIONS, '[', value, '.alpha];')
scope(ifte)
return [RGB, ALPHA]
})
case S_BLEND_COLOR:
return parseParam(
function (value) {
check.command(
isArrayLike(value) &&
value.length === 4,
'blend.color must be a 4d array', env.commandStr)
return loop(4, function (i) {
return +value[i]
})
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
env.shared.isArrayLike + '(' + value + ')&&' +
value + '.length===4',
'blend.color must be a 4d array')
})
return loop(4, function (i) {
return scope.def('+', value, '[', i, ']')
})
})
case S_STENCIL_MASK:
return parseParam(
function (value) {
check.commandType(value, 'number', param, env.commandStr)
return value | 0
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
'typeof ' + value + '==="number"',
'invalid stencil.mask')
})
return scope.def(value, '|0')
})
case S_STENCIL_FUNC:
return parseParam(
function (value) {
check.commandType(value, 'object', param, env.commandStr)
var cmp = value.cmp || 'keep'
var ref = value.ref || 0
var mask = 'mask' in value ? value.mask : -1
check.commandParameter(cmp, compareFuncs, prop + '.cmp', env.commandStr)
check.commandType(ref, 'number', prop + '.ref', env.commandStr)
check.commandType(mask, 'number', prop + '.mask', env.commandStr)
return [
compareFuncs[cmp],
ref,
mask
]
},
function (env, scope, value) {
var COMPARE_FUNCS = env.constants.compareFuncs
check.optional(function () {
function assert () {
env.assert(scope,
Array.prototype.join.call(arguments, ''),
'invalid stencil.func')
}
assert(value + '&&typeof ', value, '==="object"')
assert('!("cmp" in ', value, ')||(',
value, '.cmp in ', COMPARE_FUNCS, ')')
})
var cmp = scope.def(
'"cmp" in ', value,
'?', COMPARE_FUNCS, '[', value, '.cmp]',
':', GL_KEEP)
var ref = scope.def(value, '.ref|0')
var mask = scope.def(
'"mask" in ', value,
'?', value, '.mask|0:-1')
return [cmp, ref, mask]
})
case S_STENCIL_OPFRONT:
case S_STENCIL_OPBACK:
return parseParam(
function (value) {
check.commandType(value, 'object', param, env.commandStr)
var fail = value.fail || 'keep'
var zfail = value.zfail || 'keep'
var zpass = value.zpass || 'keep'
check.commandParameter(fail, stencilOps, prop + '.fail', env.commandStr)
check.commandParameter(zfail, stencilOps, prop + '.zfail', env.commandStr)
check.commandParameter(zpass, stencilOps, prop + '.zpass', env.commandStr)
return [
prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,
stencilOps[fail],
stencilOps[zfail],
stencilOps[zpass]
]
},
function (env, scope, value) {
var STENCIL_OPS = env.constants.stencilOps
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid ' + prop)
})
function read (name) {
check.optional(function () {
env.assert(scope,
'!("' + name + '" in ' + value + ')||' +
'(' + value + '.' + name + ' in ' + STENCIL_OPS + ')',
'invalid ' + prop + '.' + name + ', must be one of ' + Object.keys(stencilOps))
})
return scope.def(
'"', name, '" in ', value,
'?', STENCIL_OPS, '[', value, '.', name, ']:',
GL_KEEP)
}
return [
prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,
read('fail'),
read('zfail'),
read('zpass')
]
})
case S_POLYGON_OFFSET_OFFSET:
return parseParam(
function (value) {
check.commandType(value, 'object', param, env.commandStr)
var factor = value.factor | 0
var units = value.units | 0
check.commandType(factor, 'number', param + '.factor', env.commandStr)
check.commandType(units, 'number', param + '.units', env.commandStr)
return [factor, units]
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid ' + prop)
})
var FACTOR = scope.def(value, '.factor|0')
var UNITS = scope.def(value, '.units|0')
return [FACTOR, UNITS]
})
case S_CULL_FACE:
return parseParam(
function (value) {
var face = 0
if (value === 'front') {
face = GL_FRONT
} else if (value === 'back') {
face = GL_BACK
}
check.command(!!face, param, env.commandStr)
return face
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '==="front"||' +
value + '==="back"',
'invalid cull.face')
})
return scope.def(value, '==="front"?', GL_FRONT, ':', GL_BACK)
})
case S_LINE_WIDTH:
return parseParam(
function (value) {
check.command(
typeof value === 'number' &&
value >= limits.lineWidthDims[0] &&
value <= limits.lineWidthDims[1],
'invalid line width, must be a positive number between ' +
limits.lineWidthDims[0] + ' and ' + limits.lineWidthDims[1], env.commandStr)
return value
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
'typeof ' + value + '==="number"&&' +
value + '>=' + limits.lineWidthDims[0] + '&&' +
value + '<=' + limits.lineWidthDims[1],
'invalid line width')
})
return value
})
case S_FRONT_FACE:
return parseParam(
function (value) {
check.commandParameter(value, orientationType, param, env.commandStr)
return orientationType[value]
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '==="cw"||' +
value + '==="ccw"',
'invalid frontFace, must be one of cw,ccw')
})
return scope.def(value + '==="cw"?' + GL_CW + ':' + GL_CCW)
})
case S_COLOR_MASK:
return parseParam(
function (value) {
check.command(
isArrayLike(value) && value.length === 4,
'color.mask must be length 4 array', env.commandStr)
return value.map(function (v) { return !!v })
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
env.shared.isArrayLike + '(' + value + ')&&' +
value + '.length===4',
'invalid color.mask')
})
return loop(4, function (i) {
return '!!' + value + '[' + i + ']'
})
})
case S_SAMPLE_COVERAGE:
return parseParam(
function (value) {
check.command(typeof value === 'object' && value, param, env.commandStr)
var sampleValue = 'value' in value ? value.value : 1
var sampleInvert = !!value.invert
check.command(
typeof sampleValue === 'number' &&
sampleValue >= 0 && sampleValue <= 1,
'sample.coverage.value must be a number between 0 and 1', env.commandStr)
return [sampleValue, sampleInvert]
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid sample.coverage')
})
var VALUE = scope.def(
'"value" in ', value, '?+', value, '.value:1')
var INVERT = scope.def('!!', value, '.invert')
return [VALUE, INVERT]
})
}
})
return STATE
}
function parseUniforms (uniforms, env) {
var staticUniforms = uniforms.static
var dynamicUniforms = uniforms.dynamic
var UNIFORMS = {}
Object.keys(staticUniforms).forEach(function (name) {
var value = staticUniforms[name]
var result
if (typeof value === 'number' ||
typeof value === 'boolean') {
result = createStaticDecl(function () {
return value
})
} else if (typeof value === 'function') {
var reglType = value._reglType
if (reglType === 'texture2d' ||
reglType === 'textureCube') {
result = createStaticDecl(function (env) {
return env.link(value)
})
} else if (reglType === 'framebuffer' ||
reglType === 'framebufferCube') {
check.command(value.color.length > 0,
'missing color attachment for framebuffer sent to uniform "' + name + '"', env.commandStr)
result = createStaticDecl(function (env) {
return env.link(value.color[0])
})
} else {
check.commandRaise('invalid data for uniform "' + name + '"', env.commandStr)
}
} else if (isArrayLike(value)) {
result = createStaticDecl(function (env) {
var ITEM = env.global.def('[',
loop(value.length, function (i) {
check.command(
typeof value[i] === 'number' ||
typeof value[i] === 'boolean',
'invalid uniform ' + name, env.commandStr)
return value[i]
}), ']')
return ITEM
})
} else {
check.commandRaise('invalid or missing data for uniform "' + name + '"', env.commandStr)
}
result.value = value
UNIFORMS[name] = result
})
Object.keys(dynamicUniforms).forEach(function (key) {
var dyn = dynamicUniforms[key]
UNIFORMS[key] = createDynamicDecl(dyn, function (env, scope) {
return env.invoke(scope, dyn)
})
})
return UNIFORMS
}
function parseAttributes (attributes, env) {
var staticAttributes = attributes.static
var dynamicAttributes = attributes.dynamic
var attributeDefs = {}
Object.keys(staticAttributes).forEach(function (attribute) {
var value = staticAttributes[attribute]
var id = stringStore.id(attribute)
var record = new AttributeRecord()
if (isBufferArgs(value)) {
record.state = ATTRIB_STATE_POINTER
record.buffer = bufferState.getBuffer(
bufferState.create(value, GL_ARRAY_BUFFER, false, true))
record.type = 0
} else {
var buffer = bufferState.getBuffer(value)
if (buffer) {
record.state = ATTRIB_STATE_POINTER
record.buffer = buffer
record.type = 0
} else {
check.command(typeof value === 'object' && value,
'invalid data for attribute ' + attribute, env.commandStr)
if ('constant' in value) {
var constant = value.constant
record.buffer = 'null'
record.state = ATTRIB_STATE_CONSTANT
if (typeof constant === 'number') {
record.x = constant
} else {
check.command(
isArrayLike(constant) &&
constant.length > 0 &&
constant.length <= 4,
'invalid constant for attribute ' + attribute, env.commandStr)
CUTE_COMPONENTS.forEach(function (c, i) {
if (i < constant.length) {
record[c] = constant[i]
}
})
}
} else {
if (isBufferArgs(value.buffer)) {
buffer = bufferState.getBuffer(
bufferState.create(value.buffer, GL_ARRAY_BUFFER, false, true))
} else {
buffer = bufferState.getBuffer(value.buffer)
}
check.command(!!buffer, 'missing buffer for attribute "' + attribute + '"', env.commandStr)
var offset = value.offset | 0
check.command(offset >= 0,
'invalid offset for attribute "' + attribute + '"', env.commandStr)
var stride = value.stride | 0
check.command(stride >= 0 && stride < 256,
'invalid stride for attribute "' + attribute + '", must be integer betweeen [0, 255]', env.commandStr)
var size = value.size | 0
check.command(!('size' in value) || (size > 0 && size <= 4),
'invalid size for attribute "' + attribute + '", must be 1,2,3,4', env.commandStr)
var normalized = !!value.normalized
var type = 0
if ('type' in value) {
check.commandParameter(
value.type, glTypes,
'invalid type for attribute ' + attribute, env.commandStr)
type = glTypes[value.type]
}
var divisor = value.divisor | 0
check.optional(function () {
if ('divisor' in value) {
check.command(divisor === 0 || extInstancing,
'cannot specify divisor for attribute "' + attribute + '", instancing not supported', env.commandStr)
check.command(divisor >= 0,
'invalid divisor for attribute "' + attribute + '"', env.commandStr)
}
var command = env.commandStr
var VALID_KEYS = [
'buffer',
'offset',
'divisor',
'normalized',
'type',
'size',
'stride'
]
Object.keys(value).forEach(function (prop) {
check.command(
VALID_KEYS.indexOf(prop) >= 0,
'unknown parameter "' + prop + '" for attribute pointer "' + attribute + '" (valid parameters are ' + VALID_KEYS + ')',
command)
})
})
record.buffer = buffer
record.state = ATTRIB_STATE_POINTER
record.size = size
record.normalized = normalized
record.type = type || buffer.dtype
record.offset = offset
record.stride = stride
record.divisor = divisor
}
}
}
attributeDefs[attribute] = createStaticDecl(function (env, scope) {
var cache = env.attribCache
if (id in cache) {
return cache[id]
}
var result = {
isStream: false
}
Object.keys(record).forEach(function (key) {
result[key] = record[key]
})
if (record.buffer) {
result.buffer = env.link(record.buffer)
result.type = result.type || (result.buffer + '.dtype')
}
cache[id] = result
return result
})
})
Object.keys(dynamicAttributes).forEach(function (attribute) {
var dyn = dynamicAttributes[attribute]
function appendAttributeCode (env, block) {
var VALUE = env.invoke(block, dyn)
var shared = env.shared
var constants = env.constants
var IS_BUFFER_ARGS = shared.isBufferArgs
var BUFFER_STATE = shared.buffer
// Perform validation on attribute
check.optional(function () {
env.assert(block,
VALUE + '&&(typeof ' + VALUE + '==="object"||typeof ' +
VALUE + '==="function")&&(' +
IS_BUFFER_ARGS + '(' + VALUE + ')||' +
BUFFER_STATE + '.getBuffer(' + VALUE + ')||' +
BUFFER_STATE + '.getBuffer(' + VALUE + '.buffer)||' +
IS_BUFFER_ARGS + '(' + VALUE + '.buffer)||' +
'("constant" in ' + VALUE +
'&&(typeof ' + VALUE + '.constant==="number"||' +
shared.isArrayLike + '(' + VALUE + '.constant))))',
'invalid dynamic attribute "' + attribute + '"')
})
// allocate names for result
var result = {
isStream: block.def(false)
}
var defaultRecord = new AttributeRecord()
defaultRecord.state = ATTRIB_STATE_POINTER
Object.keys(defaultRecord).forEach(function (key) {
result[key] = block.def('' + defaultRecord[key])
})
var BUFFER = result.buffer
var TYPE = result.type
block(
'if(', IS_BUFFER_ARGS, '(', VALUE, ')){',
result.isStream, '=true;',
BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER, ',', VALUE, ');',
TYPE, '=', BUFFER, '.dtype;',
'}else{',
BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, ');',
'if(', BUFFER, '){',
TYPE, '=', BUFFER, '.dtype;',
'}else if("constant" in ', VALUE, '){',
result.state, '=', ATTRIB_STATE_CONSTANT, ';',
'if(typeof ' + VALUE + '.constant === "number"){',
result[CUTE_COMPONENTS[0]], '=', VALUE, '.constant;',
CUTE_COMPONENTS.slice(1).map(function (n) {
return result[n]
}).join('='), '=0;',
'}else{',
CUTE_COMPONENTS.map(function (name, i) {
return (
result[name] + '=' + VALUE + '.constant.length>' + i +
'?' + VALUE + '.constant[' + i + ']:0;'
)
}).join(''),
'}}else{',
'if(', IS_BUFFER_ARGS, '(', VALUE, '.buffer)){',
BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER, ',', VALUE, '.buffer);',
'}else{',
BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, '.buffer);',
'}',
TYPE, '="type" in ', VALUE, '?',
constants.glTypes, '[', VALUE, '.type]:', BUFFER, '.dtype;',
result.normalized, '=!!', VALUE, '.normalized;')
function emitReadRecord (name) {
block(result[name], '=', VALUE, '.', name, '|0;')
}
emitReadRecord('size')
emitReadRecord('offset')
emitReadRecord('stride')
emitReadRecord('divisor')
block('}}')
block.exit(
'if(', result.isStream, '){',
BUFFER_STATE, '.destroyStream(', BUFFER, ');',
'}')
return result
}
attributeDefs[attribute] = createDynamicDecl(dyn, appendAttributeCode)
})
return attributeDefs
}
function parseContext (context) {
var staticContext = context.static
var dynamicContext = context.dynamic
var result = {}
Object.keys(staticContext).forEach(function (name) {
var value = staticContext[name]
result[name] = createStaticDecl(function (env, scope) {
if (typeof value === 'number' || typeof value === 'boolean') {
return '' + value
} else {
return env.link(value)
}
})
})
Object.keys(dynamicContext).forEach(function (name) {
var dyn = dynamicContext[name]
result[name] = createDynamicDecl(dyn, function (env, scope) {
return env.invoke(scope, dyn)
})
})
return result
}
function parseArguments (options, attributes, uniforms, context, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
check.optional(function () {
var KEY_NAMES = [
S_FRAMEBUFFER,
S_VERT,
S_FRAG,
S_ELEMENTS,
S_PRIMITIVE,
S_OFFSET,
S_COUNT,
S_INSTANCES,
S_PROFILE,
S_VAO
].concat(GL_STATE_NAMES)
function checkKeys (dict) {
Object.keys(dict).forEach(function (key) {
check.command(
KEY_NAMES.indexOf(key) >= 0,
'unknown parameter "' + key + '"',
env.commandStr)
})
}
checkKeys(staticOptions)
checkKeys(dynamicOptions)
})
var attribLocations = parseAttribLocations(options, attributes)
var framebuffer = parseFramebuffer(options, env)
var viewportAndScissor = parseViewportScissor(options, framebuffer, env)
var draw = parseDraw(options, env)
var state = parseGLState(options, env)
var shader = parseProgram(options, env, attribLocations)
function copyBox (name) {
var defn = viewportAndScissor[name]
if (defn) {
state[name] = defn
}
}
copyBox(S_VIEWPORT)
copyBox(propName(S_SCISSOR_BOX))
var dirty = Object.keys(state).length > 0
var result = {
framebuffer: framebuffer,
draw: draw,
shader: shader,
state: state,
dirty: dirty,
scopeVAO: null,
drawVAO: null,
useVAO: false,
attributes: {}
}
result.profile = parseProfile(options, env)
result.uniforms = parseUniforms(uniforms, env)
result.drawVAO = result.scopeVAO = draw.vao
// special case: check if we can statically allocate a vertex array object for this program
if (!result.drawVAO &&
shader.program &&
!attribLocations &&
extensions.angle_instanced_arrays &&
draw.static.elements) {
var useVAO = true
var staticBindings = shader.program.attributes.map(function (attr) {
var binding = attributes.static[attr]
useVAO = useVAO && !!binding
return binding
})
if (useVAO && staticBindings.length > 0) {
var vao = attributeState.getVAO(attributeState.createVAO({
attributes: staticBindings,
elements: draw.static.elements
}))
result.drawVAO = new Declaration(null, null, null, function (env, scope) {
return env.link(vao)
})
result.useVAO = true
}
}
if (attribLocations) {
result.useVAO = true
} else {
result.attributes = parseAttributes(attributes, env)
}
result.context = parseContext(context, env)
return result
}
// ===================================================
// ===================================================
// COMMON UPDATE FUNCTIONS
// ===================================================
// ===================================================
function emitContext (env, scope, context) {
var shared = env.shared
var CONTEXT = shared.context
var contextEnter = env.scope()
Object.keys(context).forEach(function (name) {
scope.save(CONTEXT, '.' + name)
var defn = context[name]
var value = defn.append(env, scope)
if (Array.isArray(value)) {
contextEnter(CONTEXT, '.', name, '=[', value.join(), '];')
} else {
contextEnter(CONTEXT, '.', name, '=', value, ';')
}
})
scope(contextEnter)
}
// ===================================================
// ===================================================
// COMMON DRAWING FUNCTIONS
// ===================================================
// ===================================================
function emitPollFramebuffer (env, scope, framebuffer, skipCheck) {
var shared = env.shared
var GL = shared.gl
var FRAMEBUFFER_STATE = shared.framebuffer
var EXT_DRAW_BUFFERS
if (extDrawBuffers) {
EXT_DRAW_BUFFERS = scope.def(shared.extensions, '.webgl_draw_buffers')
}
var constants = env.constants
var DRAW_BUFFERS = constants.drawBuffer
var BACK_BUFFER = constants.backBuffer
var NEXT
if (framebuffer) {
NEXT = framebuffer.append(env, scope)
} else {
NEXT = scope.def(FRAMEBUFFER_STATE, '.next')
}
if (!skipCheck) {
scope('if(', NEXT, '!==', FRAMEBUFFER_STATE, '.cur){')
}
scope(
'if(', NEXT, '){',
GL, '.bindFramebuffer(', GL_FRAMEBUFFER, ',', NEXT, '.framebuffer);')
if (extDrawBuffers) {
scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(',
DRAW_BUFFERS, '[', NEXT, '.colorAttachments.length]);')
}
scope('}else{',
GL, '.bindFramebuffer(', GL_FRAMEBUFFER, ',null);')
if (extDrawBuffers) {
scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(', BACK_BUFFER, ');')
}
scope(
'}',
FRAMEBUFFER_STATE, '.cur=', NEXT, ';')
if (!skipCheck) {
scope('}')
}
}
function emitPollState (env, scope, args) {
var shared = env.shared
var GL = shared.gl
var CURRENT_VARS = env.current
var NEXT_VARS = env.next
var CURRENT_STATE = shared.current
var NEXT_STATE = shared.next
var block = env.cond(CURRENT_STATE, '.dirty')
GL_STATE_NAMES.forEach(function (prop) {
var param = propName(prop)
if (param in args.state) {
return
}
var NEXT, CURRENT
if (param in NEXT_VARS) {
NEXT = NEXT_VARS[param]
CURRENT = CURRENT_VARS[param]
var parts = loop(currentState[param].length, function (i) {
return block.def(NEXT, '[', i, ']')
})
block(env.cond(parts.map(function (p, i) {
return p + '!==' + CURRENT + '[' + i + ']'
}).join('||'))
.then(
GL, '.', GL_VARIABLES[param], '(', parts, ');',
parts.map(function (p, i) {
return CURRENT + '[' + i + ']=' + p
}).join(';'), ';'))
} else {
NEXT = block.def(NEXT_STATE, '.', param)
var ifte = env.cond(NEXT, '!==', CURRENT_STATE, '.', param)
block(ifte)
if (param in GL_FLAGS) {
ifte(
env.cond(NEXT)
.then(GL, '.enable(', GL_FLAGS[param], ');')
.else(GL, '.disable(', GL_FLAGS[param], ');'),
CURRENT_STATE, '.', param, '=', NEXT, ';')
} else {
ifte(
GL, '.', GL_VARIABLES[param], '(', NEXT, ');',
CURRENT_STATE, '.', param, '=', NEXT, ';')
}
}
})
if (Object.keys(args.state).length === 0) {
block(CURRENT_STATE, '.dirty=false;')
}
scope(block)
}
function emitSetOptions (env, scope, options, filter) {
var shared = env.shared
var CURRENT_VARS = env.current
var CURRENT_STATE = shared.current
var GL = shared.gl
sortState(Object.keys(options)).forEach(function (param) {
var defn = options[param]
if (filter && !filter(defn)) {
return
}
var variable = defn.append(env, scope)
if (GL_FLAGS[param]) {
var flag = GL_FLAGS[param]
if (isStatic(defn)) {
if (variable) {
scope(GL, '.enable(', flag, ');')
} else {
scope(GL, '.disable(', flag, ');')
}
} else {
scope(env.cond(variable)
.then(GL, '.enable(', flag, ');')
.else(GL, '.disable(', flag, ');'))
}
scope(CURRENT_STATE, '.', param, '=', variable, ';')
} else if (isArrayLike(variable)) {
var CURRENT = CURRENT_VARS[param]
scope(
GL, '.', GL_VARIABLES[param], '(', variable, ');',
variable.map(function (v, i) {
return CURRENT + '[' + i + ']=' + v
}).join(';'), ';')
} else {
scope(
GL, '.', GL_VARIABLES[param], '(', variable, ');',
CURRENT_STATE, '.', param, '=', variable, ';')
}
})
}
function injectExtensions (env, scope) {
if (extInstancing) {
env.instancing = scope.def(
env.shared.extensions, '.angle_instanced_arrays')
}
}
function emitProfile (env, scope, args, useScope, incrementCounter) {
var shared = env.shared
var STATS = env.stats
var CURRENT_STATE = shared.current
var TIMER = shared.timer
var profileArg = args.profile
function perfCounter () {
if (typeof performance === 'undefined') {
return 'Date.now()'
} else {
return 'performance.now()'
}
}
var CPU_START, QUERY_COUNTER
function emitProfileStart (block) {
CPU_START = scope.def()
block(CPU_START, '=', perfCounter(), ';')
if (typeof incrementCounter === 'string') {
block(STATS, '.count+=', incrementCounter, ';')
} else {
block(STATS, '.count++;')
}
if (timer) {
if (useScope) {
QUERY_COUNTER = scope.def()
block(QUERY_COUNTER, '=', TIMER, '.getNumPendingQueries();')
} else {
block(TIMER, '.beginQuery(', STATS, ');')
}
}
}
function emitProfileEnd (block) {
block(STATS, '.cpuTime+=', perfCounter(), '-', CPU_START, ';')
if (timer) {
if (useScope) {
block(TIMER, '.pushScopeStats(',
QUERY_COUNTER, ',',
TIMER, '.getNumPendingQueries(),',
STATS, ');')
} else {
block(TIMER, '.endQuery();')
}
}
}
function scopeProfile (value) {
var prev = scope.def(CURRENT_STATE, '.profile')
scope(CURRENT_STATE, '.profile=', value, ';')
scope.exit(CURRENT_STATE, '.profile=', prev, ';')
}
var USE_PROFILE
if (profileArg) {
if (isStatic(profileArg)) {
if (profileArg.enable) {
emitProfileStart(scope)
emitProfileEnd(scope.exit)
scopeProfile('true')
} else {
scopeProfile('false')
}
return
}
USE_PROFILE = profileArg.append(env, scope)
scopeProfile(USE_PROFILE)
} else {
USE_PROFILE = scope.def(CURRENT_STATE, '.profile')
}
var start = env.block()
emitProfileStart(start)
scope('if(', USE_PROFILE, '){', start, '}')
var end = env.block()
emitProfileEnd(end)
scope.exit('if(', USE_PROFILE, '){', end, '}')
}
function emitAttributes (env, scope, args, attributes, filter) {
var shared = env.shared
function typeLength (x) {
switch (x) {
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_BOOL_VEC2:
return 2
case GL_FLOAT_VEC3:
case GL_INT_VEC3:
case GL_BOOL_VEC3:
return 3
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_BOOL_VEC4:
return 4
default:
return 1
}
}
function emitBindAttribute (ATTRIBUTE, size, record) {
var GL = shared.gl
var LOCATION = scope.def(ATTRIBUTE, '.location')
var BINDING = scope.def(shared.attributes, '[', LOCATION, ']')
var STATE = record.state
var BUFFER = record.buffer
var CONST_COMPONENTS = [
record.x,
record.y,
record.z,
record.w
]
var COMMON_KEYS = [
'buffer',
'normalized',
'offset',
'stride'
]
function emitBuffer () {
scope(
'if(!', BINDING, '.buffer){',
GL, '.enableVertexAttribArray(', LOCATION, ');}')
var TYPE = record.type
var SIZE
if (!record.size) {
SIZE = size
} else {
SIZE = scope.def(record.size, '||', size)
}
scope('if(',
BINDING, '.type!==', TYPE, '||',
BINDING, '.size!==', SIZE, '||',
COMMON_KEYS.map(function (key) {
return BINDING + '.' + key + '!==' + record[key]
}).join('||'),
'){',
GL, '.bindBuffer(', GL_ARRAY_BUFFER, ',', BUFFER, '.buffer);',
GL, '.vertexAttribPointer(', [
LOCATION,
SIZE,
TYPE,
record.normalized,
record.stride,
record.offset
], ');',
BINDING, '.type=', TYPE, ';',
BINDING, '.size=', SIZE, ';',
COMMON_KEYS.map(function (key) {
return BINDING + '.' + key + '=' + record[key] + ';'
}).join(''),
'}')
if (extInstancing) {
var DIVISOR = record.divisor
scope(
'if(', BINDING, '.divisor!==', DIVISOR, '){',
env.instancing, '.vertexAttribDivisorANGLE(', [LOCATION, DIVISOR], ');',
BINDING, '.divisor=', DIVISOR, ';}')
}
}
function emitConstant () {
scope(
'if(', BINDING, '.buffer){',
GL, '.disableVertexAttribArray(', LOCATION, ');',
BINDING, '.buffer=null;',
'}if(', CUTE_COMPONENTS.map(function (c, i) {
return BINDING + '.' + c + '!==' + CONST_COMPONENTS[i]
}).join('||'), '){',
GL, '.vertexAttrib4f(', LOCATION, ',', CONST_COMPONENTS, ');',
CUTE_COMPONENTS.map(function (c, i) {
return BINDING + '.' + c + '=' + CONST_COMPONENTS[i] + ';'
}).join(''),
'}')
}
if (STATE === ATTRIB_STATE_POINTER) {
emitBuffer()
} else if (STATE === ATTRIB_STATE_CONSTANT) {
emitConstant()
} else {
scope('if(', STATE, '===', ATTRIB_STATE_POINTER, '){')
emitBuffer()
scope('}else{')
emitConstant()
scope('}')
}
}
attributes.forEach(function (attribute) {
var name = attribute.name
var arg = args.attributes[name]
var record
if (arg) {
if (!filter(arg)) {
return
}
record = arg.append(env, scope)
} else {
if (!filter(SCOPE_DECL)) {
return
}
var scopeAttrib = env.scopeAttrib(name)
check.optional(function () {
env.assert(scope,
scopeAttrib + '.state',
'missing attribute ' + name)
})
record = {}
Object.keys(new AttributeRecord()).forEach(function (key) {
record[key] = scope.def(scopeAttrib, '.', key)
})
}
emitBindAttribute(
env.link(attribute), typeLength(attribute.info.type), record)
})
}
function emitUniforms (env, scope, args, uniforms, filter, isBatchInnerLoop) {
var shared = env.shared
var GL = shared.gl
var definedArrUniforms = {}
var infix
for (var i = 0; i < uniforms.length; ++i) {
var uniform = uniforms[i]
var name = uniform.name
var type = uniform.info.type
var size = uniform.info.size
var arg = args.uniforms[name]
if (size > 1) {
// either foo[n] or foos, avoid define both
if (!arg) {
continue
}
var arrUniformName = name.replace('[0]', '')
if (definedArrUniforms[arrUniformName]) {
continue
}
definedArrUniforms[arrUniformName] = 1
}
var UNIFORM = env.link(uniform)
var LOCATION = UNIFORM + '.location'
var VALUE
if (arg) {
if (!filter(arg)) {
continue
}
if (isStatic(arg)) {
var value = arg.value
check.command(
value !== null && typeof value !== 'undefined',
'missing uniform "' + name + '"', env.commandStr)
if (type === GL_SAMPLER_2D || type === GL_SAMPLER_CUBE) {
check.command(
typeof value === 'function' &&
((type === GL_SAMPLER_2D &&
(value._reglType === 'texture2d' ||
value._reglType === 'framebuffer')) ||
(type === GL_SAMPLER_CUBE &&
(value._reglType === 'textureCube' ||
value._reglType === 'framebufferCube'))),
'invalid texture for uniform ' + name, env.commandStr)
var TEX_VALUE = env.link(value._texture || value.color[0]._texture)
scope(GL, '.uniform1i(', LOCATION, ',', TEX_VALUE + '.bind());')
scope.exit(TEX_VALUE, '.unbind();')
} else if (
type === GL_FLOAT_MAT2 ||
type === GL_FLOAT_MAT3 ||
type === GL_FLOAT_MAT4) {
check.optional(function () {
check.command(isArrayLike(value),
'invalid matrix for uniform ' + name, env.commandStr)
check.command(
(type === GL_FLOAT_MAT2 && value.length === 4) ||
(type === GL_FLOAT_MAT3 && value.length === 9) ||
(type === GL_FLOAT_MAT4 && value.length === 16),
'invalid length for matrix uniform ' + name, env.commandStr)
})
var MAT_VALUE = env.global.def('new Float32Array([' +
Array.prototype.slice.call(value) + '])')
var dim = 2
if (type === GL_FLOAT_MAT3) {
dim = 3
} else if (type === GL_FLOAT_MAT4) {
dim = 4
}
scope(
GL, '.uniformMatrix', dim, 'fv(',
LOCATION, ',false,', MAT_VALUE, ');')
} else {
switch (type) {
case GL_FLOAT:
if (size === 1) {
check.commandType(value, 'number', 'uniform ' + name, env.commandStr)
} else {
check.command(
isArrayLike(value) && (value.length === size),
'uniform ' + name, env.commandStr)
}
infix = '1f'
break
case GL_FLOAT_VEC2:
check.command(
isArrayLike(value) && (value.length && value.length % 2 === 0 && value.length <= size * 2),
'uniform ' + name, env.commandStr)
infix = '2f'
break
case GL_FLOAT_VEC3:
check.command(
isArrayLike(value) && (value.length && value.length % 3 === 0 && value.length <= size * 3),
'uniform ' + name, env.commandStr)
infix = '3f'
break
case GL_FLOAT_VEC4:
check.command(
isArrayLike(value) && (value.length && value.length % 4 === 0 && value.length <= size * 4),
'uniform ' + name, env.commandStr)
infix = '4f'
break
case GL_BOOL:
if (size === 1) {
check.commandType(value, 'boolean', 'uniform ' + name, env.commandStr)
} else {
check.command(
isArrayLike(value) && (value.length === size),
'uniform ' + name, env.commandStr)
}
infix = '1i'
break
case GL_INT:
if (size === 1) {
check.commandType(value, 'number', 'uniform ' + name, env.commandStr)
} else {
check.command(
isArrayLike(value) && (value.length === size),
'uniform ' + name, env.commandStr)
}
infix = '1i'
break
case GL_BOOL_VEC2:
check.command(
isArrayLike(value) && (value.length && value.length % 2 === 0 && value.length <= size * 2),
'uniform ' + name, env.commandStr)
infix = '2i'
break
case GL_INT_VEC2:
check.command(
isArrayLike(value) && (value.length && value.length % 2 === 0 && value.length <= size * 2),
'uniform ' + name, env.commandStr)
infix = '2i'
break
case GL_BOOL_VEC3:
check.command(
isArrayLike(value) && (value.length && value.length % 3 === 0 && value.length <= size * 3),
'uniform ' + name, env.commandStr)
infix = '3i'
break
case GL_INT_VEC3:
check.command(
isArrayLike(value) && (value.length && value.length % 3 === 0 && value.length <= size * 3),
'uniform ' + name, env.commandStr)
infix = '3i'
break
case GL_BOOL_VEC4:
check.command(
isArrayLike(value) && (value.length && value.length % 4 === 0 && value.length <= size * 4),
'uniform ' + name, env.commandStr)
infix = '4i'
break
case GL_INT_VEC4:
check.command(
isArrayLike(value) && (value.length && value.length % 4 === 0 && value.length <= size * 4),
'uniform ' + name, env.commandStr)
infix = '4i'
break
}
if (size > 1) {
infix += 'v'
value = env.global.def('[' +
Array.prototype.slice.call(value) + ']')
} else {
value = isArrayLike(value) ? Array.prototype.slice.call(value) : value
}
scope(GL, '.uniform', infix, '(', LOCATION, ',',
value,
');')
}
continue
} else {
VALUE = arg.append(env, scope)
}
} else {
if (!filter(SCOPE_DECL)) {
continue
}
VALUE = scope.def(shared.uniforms, '[', stringStore.id(name), ']')
}
if (type === GL_SAMPLER_2D) {
check(!Array.isArray(VALUE), 'must specify a scalar prop for textures')
scope(
'if(', VALUE, '&&', VALUE, '._reglType==="framebuffer"){',
VALUE, '=', VALUE, '.color[0];',
'}')
} else if (type === GL_SAMPLER_CUBE) {
check(!Array.isArray(VALUE), 'must specify a scalar prop for cube maps')
scope(
'if(', VALUE, '&&', VALUE, '._reglType==="framebufferCube"){',
VALUE, '=', VALUE, '.color[0];',
'}')
}
// perform type validation
check.optional(function () {
function emitCheck (pred, message) {
env.assert(scope, pred,
'bad data or missing for uniform "' + name + '". ' + message)
}
function checkType (type, size) {
if (size === 1) {
check(!Array.isArray(VALUE), 'must not specify an array type for uniform')
}
emitCheck(
'Array.isArray(' + VALUE + ') && typeof ' + VALUE + '[0]===" ' + type + '"' +
' || typeof ' + VALUE + '==="' + type + '"',
'invalid type, expected ' + type)
}
function checkVector (n, type, size) {
if (Array.isArray(VALUE)) {
check(VALUE.length && VALUE.length % n === 0 && VALUE.length <= n * size, 'must have length of ' + (size === 1 ? '' : 'n * ') + n)
} else {
emitCheck(
shared.isArrayLike + '(' + VALUE + ')&&' + VALUE + '.length && ' + VALUE + '.length % ' + n + ' === 0' +
' && ' + VALUE + '.length<=' + n * size,
'invalid vector, should have length of ' + (size === 1 ? '' : 'n * ') + n, env.commandStr)
}
}
function checkTexture (target) {
check(!Array.isArray(VALUE), 'must not specify a value type')
emitCheck(
'typeof ' + VALUE + '==="function"&&' +
VALUE + '._reglType==="texture' +
(target === GL_TEXTURE_2D ? '2d' : 'Cube') + '"',
'invalid texture type', env.commandStr)
}
switch (type) {
case GL_INT:
checkType('number', size)
break
case GL_INT_VEC2:
checkVector(2, 'number', size)
break
case GL_INT_VEC3:
checkVector(3, 'number', size)
break
case GL_INT_VEC4:
checkVector(4, 'number', size)
break
case GL_FLOAT:
checkType('number', size)
break
case GL_FLOAT_VEC2:
checkVector(2, 'number', size)
break
case GL_FLOAT_VEC3:
checkVector(3, 'number', size)
break
case GL_FLOAT_VEC4:
checkVector(4, 'number', size)
break
case GL_BOOL:
checkType('boolean', size)
break
case GL_BOOL_VEC2:
checkVector(2, 'boolean', size)
break
case GL_BOOL_VEC3:
checkVector(3, 'boolean', size)
break
case GL_BOOL_VEC4:
checkVector(4, 'boolean', size)
break
case GL_FLOAT_MAT2:
checkVector(4, 'number', size)
break
case GL_FLOAT_MAT3:
checkVector(9, 'number', size)
break
case GL_FLOAT_MAT4:
checkVector(16, 'number', size)
break
case GL_SAMPLER_2D:
checkTexture(GL_TEXTURE_2D)
break
case GL_SAMPLER_CUBE:
checkTexture(GL_TEXTURE_CUBE_MAP)
break
}
})
var unroll = 1
switch (type) {
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
var TEX = scope.def(VALUE, '._texture')
scope(GL, '.uniform1i(', LOCATION, ',', TEX, '.bind());')
scope.exit(TEX, '.unbind();')
continue
case GL_INT:
case GL_BOOL:
infix = '1i'
break
case GL_INT_VEC2:
case GL_BOOL_VEC2:
infix = '2i'
unroll = 2
break
case GL_INT_VEC3:
case GL_BOOL_VEC3:
infix = '3i'
unroll = 3
break
case GL_INT_VEC4:
case GL_BOOL_VEC4:
infix = '4i'
unroll = 4
break
case GL_FLOAT:
infix = '1f'
break
case GL_FLOAT_VEC2:
infix = '2f'
unroll = 2
break
case GL_FLOAT_VEC3:
infix = '3f'
unroll = 3
break
case GL_FLOAT_VEC4:
infix = '4f'
unroll = 4
break
case GL_FLOAT_MAT2:
infix = 'Matrix2fv'
break
case GL_FLOAT_MAT3:
infix = 'Matrix3fv'
break
case GL_FLOAT_MAT4:
infix = 'Matrix4fv'
break
}
if (infix.indexOf('Matrix') === -1 && size > 1) {
infix += 'v'
unroll = 1
}
if (infix.charAt(0) === 'M') {
scope(GL, '.uniform', infix, '(', LOCATION, ',')
var matSize = Math.pow(type - GL_FLOAT_MAT2 + 2, 2)
var STORAGE = env.global.def('new Float32Array(', matSize, ')')
if (Array.isArray(VALUE)) {
scope(
'false,(',
loop(matSize, function (i) {
return STORAGE + '[' + i + ']=' + VALUE[i]
}), ',', STORAGE, ')')
} else {
scope(
'false,(Array.isArray(', VALUE, ')||', VALUE, ' instanceof Float32Array)?', VALUE, ':(',
loop(matSize, function (i) {
return STORAGE + '[' + i + ']=' + VALUE + '[' + i + ']'
}), ',', STORAGE, ')')
}
scope(');')
} else if (unroll > 1) {
var prev = []
var cur = []
for (var j = 0; j < unroll; ++j) {
if (Array.isArray(VALUE)) {
cur.push(VALUE[j])
} else {
cur.push(scope.def(VALUE + '[' + j + ']'))
}
if (isBatchInnerLoop) {
prev.push(scope.def())
}
}
if (isBatchInnerLoop) {
scope('if(!', env.batchId, '||', prev.map(function (p, i) {
return p + '!==' + cur[i]
}).join('||'), '){', prev.map(function (p, i) {
return p + '=' + cur[i] + ';'
}).join(''))
}
scope(GL, '.uniform', infix, '(', LOCATION, ',', cur.join(','), ');')
if (isBatchInnerLoop) {
scope('}')
}
} else {
check(!Array.isArray(VALUE), 'uniform value must not be an array')
if (isBatchInnerLoop) {
var prevS = scope.def()
scope('if(!', env.batchId, '||', prevS, '!==', VALUE, '){',
prevS, '=', VALUE, ';')
}
scope(GL, '.uniform', infix, '(', LOCATION, ',', VALUE, ');')
if (isBatchInnerLoop) {
scope('}')
}
}
}
}
function emitDraw (env, outer, inner, args) {
var shared = env.shared
var GL = shared.gl
var DRAW_STATE = shared.draw
var drawOptions = args.draw
function emitElements () {
var defn = drawOptions.elements
var ELEMENTS
var scope = outer
if (defn) {
if ((defn.contextDep && args.contextDynamic) || defn.propDep) {
scope = inner
}
ELEMENTS = defn.append(env, scope)
if (drawOptions.elementsActive) {
scope(
'if(' + ELEMENTS + ')' +
GL + '.bindBuffer(' + GL_ELEMENT_ARRAY_BUFFER + ',' + ELEMENTS + '.buffer.buffer);')
}
} else {
ELEMENTS = scope.def()
scope(
ELEMENTS, '=', DRAW_STATE, '.', S_ELEMENTS, ';',
'if(', ELEMENTS, '){',
GL, '.bindBuffer(', GL_ELEMENT_ARRAY_BUFFER, ',', ELEMENTS, '.buffer.buffer);}',
'else if(', shared.vao, '.currentVAO){',
ELEMENTS, '=', env.shared.elements + '.getElements(' + shared.vao, '.currentVAO.elements);',
(!extVertexArrays ? 'if(' + ELEMENTS + ')' + GL + '.bindBuffer(' + GL_ELEMENT_ARRAY_BUFFER + ',' + ELEMENTS + '.buffer.buffer);' : ''),
'}')
}
return ELEMENTS
}
function emitCount () {
var defn = drawOptions.count
var COUNT
var scope = outer
if (defn) {
if ((defn.contextDep && args.contextDynamic) || defn.propDep) {
scope = inner
}
COUNT = defn.append(env, scope)
check.optional(function () {
if (defn.MISSING) {
env.assert(outer, 'false', 'missing vertex count')
}
if (defn.DYNAMIC) {
env.assert(scope, COUNT + '>=0', 'missing vertex count')
}
})
} else {
COUNT = scope.def(DRAW_STATE, '.', S_COUNT)
check.optional(function () {
env.assert(scope, COUNT + '>=0', 'missing vertex count')
})
}
return COUNT
}
var ELEMENTS = emitElements()
function emitValue (name) {
var defn = drawOptions[name]
if (defn) {
if ((defn.contextDep && args.contextDynamic) || defn.propDep) {
return defn.append(env, inner)
} else {
return defn.append(env, outer)
}
} else {
return outer.def(DRAW_STATE, '.', name)
}
}
var PRIMITIVE = emitValue(S_PRIMITIVE)
var OFFSET = emitValue(S_OFFSET)
var COUNT = emitCount()
if (typeof COUNT === 'number') {
if (COUNT === 0) {
return
}
} else {
inner('if(', COUNT, '){')
inner.exit('}')
}
var INSTANCES, EXT_INSTANCING
if (extInstancing) {
INSTANCES = emitValue(S_INSTANCES)
EXT_INSTANCING = env.instancing
}
var ELEMENT_TYPE = ELEMENTS + '.type'
var elementsStatic = drawOptions.elements && isStatic(drawOptions.elements) && !drawOptions.vaoActive
function emitInstancing () {
function drawElements () {
inner(EXT_INSTANCING, '.drawElementsInstancedANGLE(', [
PRIMITIVE,
COUNT,
ELEMENT_TYPE,
OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE + ')>>1)',
INSTANCES
], ');')
}
function drawArrays () {
inner(EXT_INSTANCING, '.drawArraysInstancedANGLE(',
[PRIMITIVE, OFFSET, COUNT, INSTANCES], ');')
}
if (ELEMENTS && ELEMENTS !== 'null') {
if (!elementsStatic) {
inner('if(', ELEMENTS, '){')
drawElements()
inner('}else{')
drawArrays()
inner('}')
} else {
drawElements()
}
} else {
drawArrays()
}
}
function emitRegular () {
function drawElements () {
inner(GL + '.drawElements(' + [
PRIMITIVE,
COUNT,
ELEMENT_TYPE,
OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE + ')>>1)'
] + ');')
}
function drawArrays () {
inner(GL + '.drawArrays(' + [PRIMITIVE, OFFSET, COUNT] + ');')
}
if (ELEMENTS && ELEMENTS !== 'null') {
if (!elementsStatic) {
inner('if(', ELEMENTS, '){')
drawElements()
inner('}else{')
drawArrays()
inner('}')
} else {
drawElements()
}
} else {
drawArrays()
}
}
if (extInstancing && (typeof INSTANCES !== 'number' || INSTANCES >= 0)) {
if (typeof INSTANCES === 'string') {
inner('if(', INSTANCES, '>0){')
emitInstancing()
inner('}else if(', INSTANCES, '<0){')
emitRegular()
inner('}')
} else {
emitInstancing()
}
} else {
emitRegular()
}
}
function createBody (emitBody, parentEnv, args, program, count) {
var env = createREGLEnvironment()
var scope = env.proc('body', count)
check.optional(function () {
env.commandStr = parentEnv.commandStr
env.command = env.link(parentEnv.commandStr)
})
if (extInstancing) {
env.instancing = scope.def(
env.shared.extensions, '.angle_instanced_arrays')
}
emitBody(env, scope, args, program)
return env.compile().body
}
// ===================================================
// ===================================================
// DRAW PROC
// ===================================================
// ===================================================
function emitDrawBody (env, draw, args, program) {
injectExtensions(env, draw)
if (args.useVAO) {
if (args.drawVAO) {
draw(env.shared.vao, '.setVAO(', args.drawVAO.append(env, draw), ');')
} else {
draw(env.shared.vao, '.setVAO(', env.shared.vao, '.targetVAO);')
}
} else {
draw(env.shared.vao, '.setVAO(null);')
emitAttributes(env, draw, args, program.attributes, function () {
return true
})
}
emitUniforms(env, draw, args, program.uniforms, function () {
return true
}, false)
emitDraw(env, draw, draw, args)
}
function emitDrawProc (env, args) {
var draw = env.proc('draw', 1)
injectExtensions(env, draw)
emitContext(env, draw, args.context)
emitPollFramebuffer(env, draw, args.framebuffer)
emitPollState(env, draw, args)
emitSetOptions(env, draw, args.state)
emitProfile(env, draw, args, false, true)
var program = args.shader.progVar.append(env, draw)
draw(env.shared.gl, '.useProgram(', program, '.program);')
if (args.shader.program) {
emitDrawBody(env, draw, args, args.shader.program)
} else {
draw(env.shared.vao, '.setVAO(null);')
var drawCache = env.global.def('{}')
var PROG_ID = draw.def(program, '.id')
var CACHED_PROC = draw.def(drawCache, '[', PROG_ID, ']')
draw(
env.cond(CACHED_PROC)
.then(CACHED_PROC, '.call(this,a0);')
.else(
CACHED_PROC, '=', drawCache, '[', PROG_ID, ']=',
env.link(function (program) {
return createBody(emitDrawBody, env, args, program, 1)
}), '(', program, ');',
CACHED_PROC, '.call(this,a0);'))
}
if (Object.keys(args.state).length > 0) {
draw(env.shared.current, '.dirty=true;')
}
if (env.shared.vao) {
draw(env.shared.vao, '.setVAO(null);')
}
}
// ===================================================
// ===================================================
// BATCH PROC
// ===================================================
// ===================================================
function emitBatchDynamicShaderBody (env, scope, args, program) {
env.batchId = 'a1'
injectExtensions(env, scope)
function all () {
return true
}
emitAttributes(env, scope, args, program.attributes, all)
emitUniforms(env, scope, args, program.uniforms, all, false)
emitDraw(env, scope, scope, args)
}
function emitBatchBody (env, scope, args, program) {
injectExtensions(env, scope)
var contextDynamic = args.contextDep
var BATCH_ID = scope.def()
var PROP_LIST = 'a0'
var NUM_PROPS = 'a1'
var PROPS = scope.def()
env.shared.props = PROPS
env.batchId = BATCH_ID
var outer = env.scope()
var inner = env.scope()
scope(
outer.entry,
'for(', BATCH_ID, '=0;', BATCH_ID, '<', NUM_PROPS, ';++', BATCH_ID, '){',
PROPS, '=', PROP_LIST, '[', BATCH_ID, '];',
inner,
'}',
outer.exit)
function isInnerDefn (defn) {
return ((defn.contextDep && contextDynamic) || defn.propDep)
}
function isOuterDefn (defn) {
return !isInnerDefn(defn)
}
if (args.needsContext) {
emitContext(env, inner, args.context)
}
if (args.needsFramebuffer) {
emitPollFramebuffer(env, inner, args.framebuffer)
}
emitSetOptions(env, inner, args.state, isInnerDefn)
if (args.profile && isInnerDefn(args.profile)) {
emitProfile(env, inner, args, false, true)
}
if (!program) {
var progCache = env.global.def('{}')
var PROGRAM = args.shader.progVar.append(env, inner)
var PROG_ID = inner.def(PROGRAM, '.id')
var CACHED_PROC = inner.def(progCache, '[', PROG_ID, ']')
inner(
env.shared.gl, '.useProgram(', PROGRAM, '.program);',
'if(!', CACHED_PROC, '){',
CACHED_PROC, '=', progCache, '[', PROG_ID, ']=',
env.link(function (program) {
return createBody(
emitBatchDynamicShaderBody, env, args, program, 2)
}), '(', PROGRAM, ');}',
CACHED_PROC, '.call(this,a0[', BATCH_ID, '],', BATCH_ID, ');')
} else {
if (args.useVAO) {
if (args.drawVAO) {
if (isInnerDefn(args.drawVAO)) {
// vao is a prop
inner(env.shared.vao, '.setVAO(', args.drawVAO.append(env, inner), ');')
} else {
// vao is invariant
outer(env.shared.vao, '.setVAO(', args.drawVAO.append(env, outer), ');')
}
} else {
// scoped vao binding
outer(env.shared.vao, '.setVAO(', env.shared.vao, '.targetVAO);')
}
} else {
outer(env.shared.vao, '.setVAO(null);')
emitAttributes(env, outer, args, program.attributes, isOuterDefn)
emitAttributes(env, inner, args, program.attributes, isInnerDefn)
}
emitUniforms(env, outer, args, program.uniforms, isOuterDefn, false)
emitUniforms(env, inner, args, program.uniforms, isInnerDefn, true)
emitDraw(env, outer, inner, args)
}
}
function emitBatchProc (env, args) {
var batch = env.proc('batch', 2)
env.batchId = '0'
injectExtensions(env, batch)
// Check if any context variables depend on props
var contextDynamic = false
var needsContext = true
Object.keys(args.context).forEach(function (name) {
contextDynamic = contextDynamic || args.context[name].propDep
})
if (!contextDynamic) {
emitContext(env, batch, args.context)
needsContext = false
}
// framebuffer state affects framebufferWidth/height context vars
var framebuffer = args.framebuffer
var needsFramebuffer = false
if (framebuffer) {
if (framebuffer.propDep) {
contextDynamic = needsFramebuffer = true
} else if (framebuffer.contextDep && contextDynamic) {
needsFramebuffer = true
}
if (!needsFramebuffer) {
emitPollFramebuffer(env, batch, framebuffer)
}
} else {
emitPollFramebuffer(env, batch, null)
}
// viewport is weird because it can affect context vars
if (args.state.viewport && args.state.viewport.propDep) {
contextDynamic = true
}
function isInnerDefn (defn) {
return (defn.contextDep && contextDynamic) || defn.propDep
}
// set webgl options
emitPollState(env, batch, args)
emitSetOptions(env, batch, args.state, function (defn) {
return !isInnerDefn(defn)
})
if (!args.profile || !isInnerDefn(args.profile)) {
emitProfile(env, batch, args, false, 'a1')
}
// Save these values to args so that the batch body routine can use them
args.contextDep = contextDynamic
args.needsContext = needsContext
args.needsFramebuffer = needsFramebuffer
// determine if shader is dynamic
var progDefn = args.shader.progVar
if ((progDefn.contextDep && contextDynamic) || progDefn.propDep) {
emitBatchBody(
env,
batch,
args,
null)
} else {
var PROGRAM = progDefn.append(env, batch)
batch(env.shared.gl, '.useProgram(', PROGRAM, '.program);')
if (args.shader.program) {
emitBatchBody(
env,
batch,
args,
args.shader.program)
} else {
batch(env.shared.vao, '.setVAO(null);')
var batchCache = env.global.def('{}')
var PROG_ID = batch.def(PROGRAM, '.id')
var CACHED_PROC = batch.def(batchCache, '[', PROG_ID, ']')
batch(
env.cond(CACHED_PROC)
.then(CACHED_PROC, '.call(this,a0,a1);')
.else(
CACHED_PROC, '=', batchCache, '[', PROG_ID, ']=',
env.link(function (program) {
return createBody(emitBatchBody, env, args, program, 2)
}), '(', PROGRAM, ');',
CACHED_PROC, '.call(this,a0,a1);'))
}
}
if (Object.keys(args.state).length > 0) {
batch(env.shared.current, '.dirty=true;')
}
if (env.shared.vao) {
batch(env.shared.vao, '.setVAO(null);')
}
}
// ===================================================
// ===================================================
// SCOPE COMMAND
// ===================================================
// ===================================================
function emitScopeProc (env, args) {
var scope = env.proc('scope', 3)
env.batchId = 'a2'
var shared = env.shared
var CURRENT_STATE = shared.current
emitContext(env, scope, args.context)
if (args.framebuffer) {
args.framebuffer.append(env, scope)
}
sortState(Object.keys(args.state)).forEach(function (name) {
var defn = args.state[name]
var value = defn.append(env, scope)
if (isArrayLike(value)) {
value.forEach(function (v, i) {
scope.set(env.next[name], '[' + i + ']', v)
})
} else {
scope.set(shared.next, '.' + name, value)
}
})
emitProfile(env, scope, args, true, true)
;[S_ELEMENTS, S_OFFSET, S_COUNT, S_INSTANCES, S_PRIMITIVE].forEach(
function (opt) {
var variable = args.draw[opt]
if (!variable) {
return
}
scope.set(shared.draw, '.' + opt, '' + variable.append(env, scope))
})
Object.keys(args.uniforms).forEach(function (opt) {
var value = args.uniforms[opt].append(env, scope)
if (Array.isArray(value)) {
value = '[' + value.join() + ']'
}
scope.set(
shared.uniforms,
'[' + stringStore.id(opt) + ']',
value)
})
Object.keys(args.attributes).forEach(function (name) {
var record = args.attributes[name].append(env, scope)
var scopeAttrib = env.scopeAttrib(name)
Object.keys(new AttributeRecord()).forEach(function (prop) {
scope.set(scopeAttrib, '.' + prop, record[prop])
})
})
if (args.scopeVAO) {
scope.set(shared.vao, '.targetVAO', args.scopeVAO.append(env, scope))
}
function saveShader (name) {
var shader = args.shader[name]
if (shader) {
scope.set(shared.shader, '.' + name, shader.append(env, scope))
}
}
saveShader(S_VERT)
saveShader(S_FRAG)
if (Object.keys(args.state).length > 0) {
scope(CURRENT_STATE, '.dirty=true;')
scope.exit(CURRENT_STATE, '.dirty=true;')
}
scope('a1(', env.shared.context, ',a0,', env.batchId, ');')
}
function isDynamicObject (object) {
if (typeof object !== 'object' || isArrayLike(object)) {
return
}
var props = Object.keys(object)
for (var i = 0; i < props.length; ++i) {
if (dynamic.isDynamic(object[props[i]])) {
return true
}
}
return false
}
function splatObject (env, options, name) {
var object = options.static[name]
if (!object || !isDynamicObject(object)) {
return
}
var globals = env.global
var keys = Object.keys(object)
var thisDep = false
var contextDep = false
var propDep = false
var objectRef = env.global.def('{}')
keys.forEach(function (key) {
var value = object[key]
if (dynamic.isDynamic(value)) {
if (typeof value === 'function') {
value = object[key] = dynamic.unbox(value)
}
var deps = createDynamicDecl(value, null)
thisDep = thisDep || deps.thisDep
propDep = propDep || deps.propDep
contextDep = contextDep || deps.contextDep
} else {
globals(objectRef, '.', key, '=')
switch (typeof value) {
case 'number':
globals(value)
break
case 'string':
globals('"', value, '"')
break
case 'object':
if (Array.isArray(value)) {
globals('[', value.join(), ']')
}
break
default:
globals(env.link(value))
break
}
globals(';')
}
})
function appendBlock (env, block) {
keys.forEach(function (key) {
var value = object[key]
if (!dynamic.isDynamic(value)) {
return
}
var ref = env.invoke(block, value)
block(objectRef, '.', key, '=', ref, ';')
})
}
options.dynamic[name] = new dynamic.DynamicVariable(DYN_THUNK, {
thisDep: thisDep,
contextDep: contextDep,
propDep: propDep,
ref: objectRef,
append: appendBlock
})
delete options.static[name]
}
// ===========================================================================
// ===========================================================================
// MAIN DRAW COMMAND
// ===========================================================================
// ===========================================================================
function compileCommand (options, attributes, uniforms, context, stats) {
var env = createREGLEnvironment()
// link stats, so that we can easily access it in the program.
env.stats = env.link(stats)
// splat options and attributes to allow for dynamic nested properties
Object.keys(attributes.static).forEach(function (key) {
splatObject(env, attributes, key)
})
NESTED_OPTIONS.forEach(function (name) {
splatObject(env, options, name)
})
var args = parseArguments(options, attributes, uniforms, context, env)
emitDrawProc(env, args)
emitScopeProc(env, args)
emitBatchProc(env, args)
return extend(env.compile(), {
destroy: function () {
args.shader.program.destroy()
}
})
}
// ===========================================================================
// ===========================================================================
// POLL / REFRESH
// ===========================================================================
// ===========================================================================
return {
next: nextState,
current: currentState,
procs: (function () {
var env = createREGLEnvironment()
var poll = env.proc('poll')
var refresh = env.proc('refresh')
var common = env.block()
poll(common)
refresh(common)
var shared = env.shared
var GL = shared.gl
var NEXT_STATE = shared.next
var CURRENT_STATE = shared.current
common(CURRENT_STATE, '.dirty=false;')
emitPollFramebuffer(env, poll)
emitPollFramebuffer(env, refresh, null, true)
// Refresh updates all attribute state changes
var INSTANCING
if (extInstancing) {
INSTANCING = env.link(extInstancing)
}
// update vertex array bindings
if (extensions.oes_vertex_array_object) {
refresh(env.link(extensions.oes_vertex_array_object), '.bindVertexArrayOES(null);')
}
for (var i = 0; i < limits.maxAttributes; ++i) {
var BINDING = refresh.def(shared.attributes, '[', i, ']')
var ifte = env.cond(BINDING, '.buffer')
ifte.then(
GL, '.enableVertexAttribArray(', i, ');',
GL, '.bindBuffer(',
GL_ARRAY_BUFFER, ',',
BINDING, '.buffer.buffer);',
GL, '.vertexAttribPointer(',
i, ',',
BINDING, '.size,',
BINDING, '.type,',
BINDING, '.normalized,',
BINDING, '.stride,',
BINDING, '.offset);'
).else(
GL, '.disableVertexAttribArray(', i, ');',
GL, '.vertexAttrib4f(',
i, ',',
BINDING, '.x,',
BINDING, '.y,',
BINDING, '.z,',
BINDING, '.w);',
BINDING, '.buffer=null;')
refresh(ifte)
if (extInstancing) {
refresh(
INSTANCING, '.vertexAttribDivisorANGLE(',
i, ',',
BINDING, '.divisor);')
}
}
refresh(
env.shared.vao, '.currentVAO=null;',
env.shared.vao, '.setVAO(', env.shared.vao, '.targetVAO);')
Object.keys(GL_FLAGS).forEach(function (flag) {
var cap = GL_FLAGS[flag]
var NEXT = common.def(NEXT_STATE, '.', flag)
var block = env.block()
block('if(', NEXT, '){',
GL, '.enable(', cap, ')}else{',
GL, '.disable(', cap, ')}',
CURRENT_STATE, '.', flag, '=', NEXT, ';')
refresh(block)
poll(
'if(', NEXT, '!==', CURRENT_STATE, '.', flag, '){',
block,
'}')
})
Object.keys(GL_VARIABLES).forEach(function (name) {
var func = GL_VARIABLES[name]
var init = currentState[name]
var NEXT, CURRENT
var block = env.block()
block(GL, '.', func, '(')
if (isArrayLike(init)) {
var n = init.length
NEXT = env.global.def(NEXT_STATE, '.', name)
CURRENT = env.global.def(CURRENT_STATE, '.', name)
block(
loop(n, function (i) {
return NEXT + '[' + i + ']'
}), ');',
loop(n, function (i) {
return CURRENT + '[' + i + ']=' + NEXT + '[' + i + '];'
}).join(''))
poll(
'if(', loop(n, function (i) {
return NEXT + '[' + i + ']!==' + CURRENT + '[' + i + ']'
}).join('||'), '){',
block,
'}')
} else {
NEXT = common.def(NEXT_STATE, '.', name)
CURRENT = common.def(CURRENT_STATE, '.', name)
block(
NEXT, ');',
CURRENT_STATE, '.', name, '=', NEXT, ';')
poll(
'if(', NEXT, '!==', CURRENT, '){',
block,
'}')
}
refresh(block)
})
return env.compile()
})(),
compile: compileCommand
}
}
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