bool
WebGLContext::IsFormatValidForFB(GLenum sizedFormat) const
{
switch (sizedFormat) {
case LOCAL_GL_RGB8:
case LOCAL_GL_RGBA8:
case LOCAL_GL_RGB565:
case LOCAL_GL_RGB5_A1:
case LOCAL_GL_RGBA4:
return true;
case LOCAL_GL_SRGB8:
case LOCAL_GL_SRGB8_ALPHA8_EXT:
return IsExtensionEnabled(WebGLExtensionID::EXT_sRGB);
case LOCAL_GL_RGB32F:
case LOCAL_GL_RGBA32F:
return IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float);
case LOCAL_GL_RGB16F:
case LOCAL_GL_RGBA16F:
return IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float);
}
return false;
}
void
WebGLContext::ClearColor(GLfloat r, GLfloat g, GLfloat b, GLfloat a)
{
if (IsContextLost())
return;
MakeContextCurrent();
const bool supportsFloatColorBuffers = (IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_float) ||
IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float) ||
IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float));
if (!supportsFloatColorBuffers) {
r = GLClampFloat(r);
g = GLClampFloat(g);
b = GLClampFloat(b);
a = GLClampFloat(a);
}
gl->fClearColor(r, g, b, a);
mColorClearValue[0] = r;
mColorClearValue[1] = g;
mColorClearValue[2] = b;
mColorClearValue[3] = a;
}
webgl::ShaderValidator*
WebGLContext::CreateShaderValidator(GLenum shaderType) const
{
if (mBypassShaderValidation)
return nullptr;
ShShaderSpec spec = IsWebGL2() ? SH_WEBGL2_SPEC : SH_WEBGL_SPEC;
ShShaderOutput outputLanguage = gl->IsGLES() ? SH_ESSL_OUTPUT
: SH_GLSL_OUTPUT;
// If we're using WebGL2 we want a more specific version of GLSL
if (IsWebGL2())
outputLanguage = ShaderOutput(gl);
ShBuiltInResources resources;
memset(&resources, 0, sizeof(resources));
ShInitBuiltInResources(&resources);
resources.HashFunction = webgl::IdentifierHashFunc;
resources.MaxVertexAttribs = mGLMaxVertexAttribs;
resources.MaxVertexUniformVectors = mGLMaxVertexUniformVectors;
resources.MaxVaryingVectors = mGLMaxVaryingVectors;
resources.MaxVertexTextureImageUnits = mGLMaxVertexTextureImageUnits;
resources.MaxCombinedTextureImageUnits = mGLMaxTextureUnits;
resources.MaxTextureImageUnits = mGLMaxTextureImageUnits;
resources.MaxFragmentUniformVectors = mGLMaxFragmentUniformVectors;
resources.MaxDrawBuffers = mGLMaxDrawBuffers;
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::EXT_frag_depth))
resources.EXT_frag_depth = 1;
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_standard_derivatives))
resources.OES_standard_derivatives = 1;
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers))
resources.EXT_draw_buffers = 1;
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::EXT_shader_texture_lod))
resources.EXT_shader_texture_lod = 1;
// Tell ANGLE to allow highp in frag shaders. (unless disabled)
// If underlying GLES doesn't have highp in frag shaders, it should complain anyways.
resources.FragmentPrecisionHigh = mDisableFragHighP ? 0 : 1;
if (gl->WorkAroundDriverBugs()) {
#ifdef XP_MACOSX
if (gl->Vendor() == gl::GLVendor::NVIDIA) {
// Work around bug 890432
resources.MaxExpressionComplexity = 1000;
}
#endif
}
int compileOptions = webgl::ChooseValidatorCompileOptions(resources, gl);
return webgl::ShaderValidator::Create(shaderType, spec, outputLanguage, resources,
compileOptions);
}
void WebGLContext::GetQuery(JSContext* cx, GLenum target, GLenum pname,
JS::MutableHandleValue retval) {
const FuncScope funcScope(*this, "getQuery");
retval.setNull();
if (IsContextLost()) return;
switch (pname) {
case LOCAL_GL_CURRENT_QUERY_EXT: {
if (IsExtensionEnabled(WebGLExtensionID::EXT_disjoint_timer_query) &&
target == LOCAL_GL_TIMESTAMP) {
// Doesn't seem illegal to ask about, but is always null.
// TIMESTAMP has no slot, so ValidateQuerySlotByTarget would generate
// INVALID_ENUM.
return;
}
const auto& slot = ValidateQuerySlotByTarget(target);
if (!slot || !*slot) return;
const auto& query = *slot;
if (target != query->Target()) return;
JS::Rooted<JS::Value> v(cx);
dom::GetOrCreateDOMReflector(cx, slot->get(), &v);
retval.set(v);
}
return;
case LOCAL_GL_QUERY_COUNTER_BITS_EXT:
if (!IsExtensionEnabled(WebGLExtensionID::EXT_disjoint_timer_query))
break;
if (target != LOCAL_GL_TIME_ELAPSED_EXT &&
target != LOCAL_GL_TIMESTAMP_EXT) {
ErrorInvalidEnumInfo("target", target);
return;
}
{
GLint bits = 0;
gl->fGetQueryiv(target, pname, &bits);
if (!Has64BitTimestamps() && bits > 32) {
bits = 32;
}
retval.set(JS::Int32Value(bits));
}
return;
default:
break;
}
ErrorInvalidEnumInfo("pname", pname);
}
WebGLRefPtr<WebGLQuery>* WebGLContext::ValidateQuerySlotByTarget(
GLenum target) {
if (IsWebGL2()) {
switch (target) {
case LOCAL_GL_ANY_SAMPLES_PASSED:
case LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
return &mQuerySlot_SamplesPassed;
case LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
return &mQuerySlot_TFPrimsWritten;
default:
break;
}
}
if (IsExtensionEnabled(WebGLExtensionID::EXT_disjoint_timer_query)) {
switch (target) {
case LOCAL_GL_TIME_ELAPSED_EXT:
return &mQuerySlot_TimeElapsed;
default:
break;
}
}
ErrorInvalidEnumInfo("target", target);
return nullptr;
}
bool
WebGLContext::ValidateBlendEquationEnum(GLenum mode, const char* info)
{
switch (mode) {
case LOCAL_GL_FUNC_ADD:
case LOCAL_GL_FUNC_SUBTRACT:
case LOCAL_GL_FUNC_REVERSE_SUBTRACT:
return true;
case LOCAL_GL_MIN:
case LOCAL_GL_MAX:
if (IsWebGL2() ||
IsExtensionEnabled(WebGLExtensionID::EXT_blend_minmax))
{
return true;
}
break;
default:
break;
}
ErrorInvalidEnumInfo(info, mode);
return false;
}
ValidateOutputs::ValidateOutputs(const TExtensionBehavior &extBehavior, int maxDrawBuffers)
: TIntermTraverser(true, false, false),
mMaxDrawBuffers(maxDrawBuffers),
mAllowUnspecifiedOutputLocationResolution(
IsExtensionEnabled(extBehavior, "GL_EXT_blend_func_extended"))
{
}
bool
WebGLContext::InitWebGL2()
{
MOZ_ASSERT(IsWebGL2(), "WebGLContext is not a WebGL 2 context!");
// check OpenGL features
if (!gl->IsSupported(gl::GLFeature::occlusion_query) &&
!gl->IsSupported(gl::GLFeature::occlusion_query_boolean))
{
// On desktop, we fake occlusion_query_boolean with occlusion_query if
// necessary. (See WebGL2ContextQueries.cpp)
GenerateWarning("WebGL 2 unavailable. Requires occlusion queries.");
return false;
}
std::vector<gl::GLFeature> missingList;
for (size_t i = 0; i < ArrayLength(kRequiredFeatures); i++) {
if (!gl->IsSupported(kRequiredFeatures[i]))
missingList.push_back(kRequiredFeatures[i]);
}
if (missingList.size()) {
nsAutoCString exts;
for (auto itr = missingList.begin(); itr != missingList.end(); ++itr) {
exts.AppendLiteral("\n ");
exts.Append(gl::GLContext::GetFeatureName(*itr));
}
GenerateWarning("WebGL 2 unavailable. The following required features are"
" unavailible: %s", exts.BeginReading());
return false;
}
// ok WebGL 2 is compatible, we can enable natively supported extensions.
for (size_t i = 0; i < ArrayLength(kNativelySupportedExtensions); i++) {
EnableExtension(kNativelySupportedExtensions[i]);
MOZ_ASSERT(IsExtensionEnabled(kNativelySupportedExtensions[i]));
}
// we initialise WebGL 2 related stuff.
gl->GetUIntegerv(LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS,
&mGLMaxTransformFeedbackSeparateAttribs);
gl->GetUIntegerv(LOCAL_GL_MAX_UNIFORM_BUFFER_BINDINGS,
&mGLMaxUniformBufferBindings);
mBoundTransformFeedbackBuffers.SetLength(mGLMaxTransformFeedbackSeparateAttribs);
mBoundUniformBuffers.SetLength(mGLMaxUniformBufferBindings);
mDefaultTransformFeedback = new WebGLTransformFeedback(this, 0);
mBoundTransformFeedback = mDefaultTransformFeedback;
mBypassShaderValidation = true;
return true;
}
WebGLExtensionBase*
WebGLContext::EnableSupportedExtension(JSContext* js, WebGLExtensionID ext)
{
if (!IsExtensionEnabled(ext)) {
if (!IsExtensionSupported(js, ext))
return nullptr;
EnableExtension(ext);
}
return mExtensions[ext];
}
WebGLExtensionBase*
WebGLContext::EnableSupportedExtension(dom::CallerType callerType,
WebGLExtensionID ext)
{
if (!IsExtensionEnabled(ext)) {
if (!IsExtensionSupported(callerType, ext))
return nullptr;
EnableExtension(ext);
}
return mExtensions[ext];
}
void WebGLContext::AssertCachedBindings() const {
#ifdef DEBUG
gl::GLContext::LocalErrorScope errorScope(*gl);
if (IsWebGL2() ||
IsExtensionEnabled(WebGLExtensionID::OES_vertex_array_object)) {
AssertUintParamCorrect(gl, LOCAL_GL_VERTEX_ARRAY_BINDING,
mBoundVertexArray->mGLName);
}
GLint stencilBits = 0;
if (GetStencilBits(&stencilBits)) { // Depends on current draw framebuffer.
const GLuint stencilRefMask = (1 << stencilBits) - 1;
AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_REF, stencilRefMask,
mStencilRefFront);
AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_REF, stencilRefMask,
mStencilRefBack);
}
// Program
GLuint bound = mCurrentProgram ? mCurrentProgram->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_CURRENT_PROGRAM, bound);
// Textures
GLenum activeTexture = mActiveTexture + LOCAL_GL_TEXTURE0;
AssertUintParamCorrect(gl, LOCAL_GL_ACTIVE_TEXTURE, activeTexture);
WebGLTexture* curTex = ActiveBoundTextureForTarget(LOCAL_GL_TEXTURE_2D);
bound = curTex ? curTex->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_TEXTURE_BINDING_2D, bound);
curTex = ActiveBoundTextureForTarget(LOCAL_GL_TEXTURE_CUBE_MAP);
bound = curTex ? curTex->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_TEXTURE_BINDING_CUBE_MAP, bound);
// Buffers
bound = mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_ARRAY_BUFFER_BINDING, bound);
MOZ_ASSERT(mBoundVertexArray);
WebGLBuffer* curBuff = mBoundVertexArray->mElementArrayBuffer;
bound = curBuff ? curBuff->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_ELEMENT_ARRAY_BUFFER_BINDING, bound);
MOZ_ASSERT(!gl::GLContext::IsBadCallError(errorScope.GetError()));
#endif
// We do not check the renderbuffer binding, because we never rely on it
// matching.
}
bool
WebGLContext::IsTexParamValid(GLenum pname) const
{
switch (pname) {
case LOCAL_GL_TEXTURE_MIN_FILTER:
case LOCAL_GL_TEXTURE_MAG_FILTER:
case LOCAL_GL_TEXTURE_WRAP_S:
case LOCAL_GL_TEXTURE_WRAP_T:
return true;
case LOCAL_GL_TEXTURE_MAX_ANISOTROPY_EXT:
return IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic);
default:
return false;
}
}
bool
WebGLContext::DrawInstanced_check(const char* info)
{
MOZ_ASSERT(IsWebGL2() ||
IsExtensionEnabled(WebGLExtensionID::ANGLE_instanced_arrays));
if (!mBufferFetchingHasPerVertex) {
/* http://www.khronos.org/registry/gles/extensions/ANGLE/ANGLE_instanced_arrays.txt
* If all of the enabled vertex attribute arrays that are bound to active
* generic attributes in the program have a non-zero divisor, the draw
* call should return INVALID_OPERATION.
*
* NB: This also appears to apply to NV_instanced_arrays, though the
* INVALID_OPERATION emission is not explicitly stated.
* ARB_instanced_arrays does not have this restriction.
*/
ErrorInvalidOperation("%s: at least one vertex attribute divisor should be 0", info);
return false;
}
return true;
}
bool
WebGLContext::DrawElements_check(const char* funcName, GLenum mode, GLsizei vertCount,
GLenum type, WebGLintptr byteOffset,
GLsizei instanceCount)
{
if (!ValidateDrawModeEnum(mode, funcName))
return false;
if (mBoundTransformFeedback &&
mBoundTransformFeedback->mIsActive &&
!mBoundTransformFeedback->mIsPaused)
{
ErrorInvalidOperation("%s: DrawElements* functions are incompatible with"
" transform feedback.",
funcName);
return false;
}
if (!ValidateNonNegative(funcName, "vertCount", vertCount) ||
!ValidateNonNegative(funcName, "byteOffset", byteOffset) ||
!ValidateNonNegative(funcName, "instanceCount", instanceCount))
{
return false;
}
if (!ValidateStencilParamsForDrawCall())
return false;
if (!vertCount || !instanceCount)
return false; // No error, just early out.
uint8_t bytesPerElem = 0;
switch (type) {
case LOCAL_GL_UNSIGNED_BYTE:
bytesPerElem = 1;
break;
case LOCAL_GL_UNSIGNED_SHORT:
bytesPerElem = 2;
break;
case LOCAL_GL_UNSIGNED_INT:
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_element_index_uint)) {
bytesPerElem = 4;
}
break;
}
if (!bytesPerElem) {
ErrorInvalidEnum("%s: Invalid `type`: 0x%04x", funcName, type);
return false;
}
if (byteOffset % bytesPerElem != 0) {
ErrorInvalidOperation("%s: `byteOffset` must be a multiple of the size of `type`",
funcName);
return false;
}
////
if (IsWebGL2() && !gl->IsSupported(gl::GLFeature::prim_restart_fixed)) {
MOZ_ASSERT(gl->IsSupported(gl::GLFeature::prim_restart));
if (mPrimRestartTypeBytes != bytesPerElem) {
mPrimRestartTypeBytes = bytesPerElem;
const uint32_t ones = UINT32_MAX >> (32 - 8*mPrimRestartTypeBytes);
gl->fEnable(LOCAL_GL_PRIMITIVE_RESTART);
gl->fPrimitiveRestartIndex(ones);
}
void TranslatorGLSL::translate(TIntermNode *root, int compileOptions)
{
TInfoSinkBase& sink = getInfoSink().obj;
// Write GLSL version.
writeVersion(root);
writePragma();
// Write extension behaviour as needed
writeExtensionBehavior(root);
bool precisionEmulation = getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;
if (precisionEmulation)
{
EmulatePrecision emulatePrecision(getSymbolTable(), getShaderVersion());
root->traverse(&emulatePrecision);
emulatePrecision.updateTree();
emulatePrecision.writeEmulationHelpers(sink, getOutputType());
}
// Write emulated built-in functions if needed.
if (!getBuiltInFunctionEmulator().IsOutputEmpty())
{
sink << "// BEGIN: Generated code for built-in function emulation\n\n";
sink << "#define webgl_emu_precision\n\n";
getBuiltInFunctionEmulator().OutputEmulatedFunctions(sink);
sink << "// END: Generated code for built-in function emulation\n\n";
}
// Write array bounds clamping emulation if needed.
getArrayBoundsClamper().OutputClampingFunctionDefinition(sink);
// Declare gl_FragColor and glFragData as webgl_FragColor and webgl_FragData
// if it's core profile shaders and they are used.
if (getShaderType() == GL_FRAGMENT_SHADER)
{
const bool mayHaveESSL1SecondaryOutputs =
IsExtensionEnabled(getExtensionBehavior(), "GL_EXT_blend_func_extended") &&
getShaderVersion() == 100;
const bool declareGLFragmentOutputs = IsGLSL130OrNewer(getOutputType());
bool hasGLFragColor = false;
bool hasGLFragData = false;
bool hasGLSecondaryFragColor = false;
bool hasGLSecondaryFragData = false;
for (const auto &outputVar : outputVariables)
{
if (declareGLFragmentOutputs)
{
if (outputVar.name == "gl_FragColor")
{
ASSERT(!hasGLFragColor);
hasGLFragColor = true;
continue;
}
else if (outputVar.name == "gl_FragData")
{
ASSERT(!hasGLFragData);
hasGLFragData = true;
continue;
}
}
if (mayHaveESSL1SecondaryOutputs)
{
if (outputVar.name == "gl_SecondaryFragColorEXT")
{
ASSERT(!hasGLSecondaryFragColor);
hasGLSecondaryFragColor = true;
continue;
}
else if (outputVar.name == "gl_SecondaryFragDataEXT")
{
ASSERT(!hasGLSecondaryFragData);
hasGLSecondaryFragData = true;
continue;
}
}
}
ASSERT(!((hasGLFragColor || hasGLSecondaryFragColor) &&
(hasGLFragData || hasGLSecondaryFragData)));
if (hasGLFragColor)
{
sink << "out vec4 webgl_FragColor;\n";
}
if (hasGLFragData)
{
sink << "out vec4 webgl_FragData[gl_MaxDrawBuffers];\n";
}
if (hasGLSecondaryFragColor)
{
sink << "out vec4 angle_SecondaryFragColor;\n";
}
if (hasGLSecondaryFragData)
{
sink << "out vec4 angle_SecondaryFragData[" << getResources().MaxDualSourceDrawBuffers
<< "];\n";
}
}
// Write translated shader.
TOutputGLSL outputGLSL(sink,
getArrayIndexClampingStrategy(),
getHashFunction(),
getNameMap(),
getSymbolTable(),
getShaderVersion(),
getOutputType());
root->traverse(&outputGLSL);
}
JS::Value
WebGLContext::GetParameter(JSContext* cx, GLenum pname, ErrorResult& rv)
{
if (IsContextLost())
return JS::NullValue();
MakeContextCurrent();
if (MinCapabilityMode()) {
switch(pname) {
////////////////////////////
// Single-value params
// int
case LOCAL_GL_MAX_VERTEX_ATTRIBS:
return JS::Int32Value(MINVALUE_GL_MAX_VERTEX_ATTRIBS);
case LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
return JS::Int32Value(MINVALUE_GL_MAX_FRAGMENT_UNIFORM_VECTORS);
case LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS:
return JS::Int32Value(MINVALUE_GL_MAX_VERTEX_UNIFORM_VECTORS);
case LOCAL_GL_MAX_VARYING_VECTORS:
return JS::Int32Value(MINVALUE_GL_MAX_VARYING_VECTORS);
case LOCAL_GL_MAX_TEXTURE_SIZE:
return JS::Int32Value(MINVALUE_GL_MAX_TEXTURE_SIZE);
case LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE:
return JS::Int32Value(MINVALUE_GL_MAX_CUBE_MAP_TEXTURE_SIZE);
case LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS:
return JS::Int32Value(MINVALUE_GL_MAX_TEXTURE_IMAGE_UNITS);
case LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
return JS::Int32Value(MINVALUE_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS);
case LOCAL_GL_MAX_RENDERBUFFER_SIZE:
return JS::Int32Value(MINVALUE_GL_MAX_RENDERBUFFER_SIZE);
default:
// Return the real value; we're not overriding this one
break;
}
}
if (IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers)) {
if (pname == LOCAL_GL_MAX_COLOR_ATTACHMENTS) {
return JS::Int32Value(mGLMaxColorAttachments);
} else if (pname == LOCAL_GL_MAX_DRAW_BUFFERS) {
return JS::Int32Value(mGLMaxDrawBuffers);
} else if (pname >= LOCAL_GL_DRAW_BUFFER0 &&
pname < GLenum(LOCAL_GL_DRAW_BUFFER0 + mGLMaxDrawBuffers))
{
GLint iv = 0;
gl->fGetIntegerv(pname, &iv);
if (mBoundDrawFramebuffer)
return JS::Int32Value(iv);
const GLint index = (pname - LOCAL_GL_DRAW_BUFFER0);
if (iv == LOCAL_GL_COLOR_ATTACHMENT0 + index)
return JS::Int32Value(LOCAL_GL_BACK);
return JS::Int32Value(LOCAL_GL_NONE);
}
}
if (IsExtensionEnabled(WebGLExtensionID::OES_vertex_array_object)) {
if (pname == LOCAL_GL_VERTEX_ARRAY_BINDING) {
WebGLVertexArray* vao =
(mBoundVertexArray != mDefaultVertexArray) ? mBoundVertexArray.get() : nullptr;
return WebGLObjectAsJSValue(cx, vao, rv);
}
}
if (IsExtensionEnabled(WebGLExtensionID::EXT_disjoint_timer_query)) {
if (pname == LOCAL_GL_TIMESTAMP_EXT) {
GLuint64 iv = 0;
gl->fGetInteger64v(pname, (GLint64*) &iv);
// TODO: JS doesn't support 64-bit integers. Be lossy and
// cast to double (53 bits)
return JS::NumberValue(static_cast<double>(iv));
} else if (pname == LOCAL_GL_GPU_DISJOINT_EXT) {
// When disjoint isn't supported, leave as false.
realGLboolean disjoint = LOCAL_GL_FALSE;
if (gl->IsExtensionSupported(gl::GLContext::EXT_disjoint_timer_query)) {
gl->fGetBooleanv(pname, &disjoint);
}
return JS::BooleanValue(bool(disjoint));
}
}
// Privileged string params exposed by WEBGL_debug_renderer_info.
// The privilege check is done in WebGLContext::IsExtensionSupported.
// So here we just have to check that the extension is enabled.
if (IsExtensionEnabled(WebGLExtensionID::WEBGL_debug_renderer_info)) {
switch (pname) {
case UNMASKED_VENDOR_WEBGL:
case UNMASKED_RENDERER_WEBGL:
{
const char* overridePref = nullptr;
GLenum driverEnum = LOCAL_GL_NONE;
switch (pname) {
case UNMASKED_RENDERER_WEBGL:
overridePref = "webgl.renderer-string-override";
driverEnum = LOCAL_GL_RENDERER;
break;
case UNMASKED_VENDOR_WEBGL:
overridePref = "webgl.vendor-string-override";
driverEnum = LOCAL_GL_VENDOR;
break;
default:
MOZ_CRASH("bad `pname`");
}
bool hasRetVal = false;
nsAutoString ret;
if (overridePref) {
nsresult res = Preferences::GetString(overridePref, &ret);
if (NS_SUCCEEDED(res) && ret.Length() > 0)
hasRetVal = true;
}
if (!hasRetVal) {
const char* chars = reinterpret_cast<const char*>(gl->fGetString(driverEnum));
ret = NS_ConvertASCIItoUTF16(chars);
hasRetVal = true;
}
return StringValue(cx, ret, rv);
}
}
}
if (IsExtensionEnabled(WebGLExtensionID::OES_standard_derivatives)) {
if (pname == LOCAL_GL_FRAGMENT_SHADER_DERIVATIVE_HINT) {
GLint i = 0;
gl->fGetIntegerv(pname, &i);
return JS::Int32Value(i);
}
}
if (IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic)) {
if (pname == LOCAL_GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT) {
GLfloat f = 0.f;
gl->fGetFloatv(pname, &f);
return JS::NumberValue(f);
}
}
switch (pname) {
//
// String params
//
case LOCAL_GL_VENDOR:
case LOCAL_GL_RENDERER:
return StringValue(cx, "Mozilla", rv);
case LOCAL_GL_VERSION:
return StringValue(cx, "WebGL 1.0", rv);
case LOCAL_GL_SHADING_LANGUAGE_VERSION:
return StringValue(cx, "WebGL GLSL ES 1.0", rv);
////////////////////////////////
// Single-value params
// unsigned int
case LOCAL_GL_CULL_FACE_MODE:
case LOCAL_GL_FRONT_FACE:
case LOCAL_GL_ACTIVE_TEXTURE:
case LOCAL_GL_STENCIL_FUNC:
case LOCAL_GL_STENCIL_FAIL:
case LOCAL_GL_STENCIL_PASS_DEPTH_FAIL:
case LOCAL_GL_STENCIL_PASS_DEPTH_PASS:
case LOCAL_GL_STENCIL_BACK_FUNC:
case LOCAL_GL_STENCIL_BACK_FAIL:
case LOCAL_GL_STENCIL_BACK_PASS_DEPTH_FAIL:
case LOCAL_GL_STENCIL_BACK_PASS_DEPTH_PASS:
case LOCAL_GL_DEPTH_FUNC:
case LOCAL_GL_BLEND_SRC_RGB:
case LOCAL_GL_BLEND_SRC_ALPHA:
case LOCAL_GL_BLEND_DST_RGB:
case LOCAL_GL_BLEND_DST_ALPHA:
case LOCAL_GL_BLEND_EQUATION_RGB:
case LOCAL_GL_BLEND_EQUATION_ALPHA:
case LOCAL_GL_GENERATE_MIPMAP_HINT: {
GLint i = 0;
gl->fGetIntegerv(pname, &i);
return JS::NumberValue(uint32_t(i));
}
case LOCAL_GL_IMPLEMENTATION_COLOR_READ_TYPE: {
if (mBoundReadFramebuffer) {
FBStatus status = mBoundReadFramebuffer->CheckFramebufferStatus();
if (status != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
ErrorInvalidOperation("getParameter: Read framebuffer must be"
" complete before querying"
" IMPLEMENTATION_COLOR_READ_TYPE.");
return JS::NullValue();
}
}
GLint i = 0;
if (gl->IsSupported(gl::GLFeature::ES2_compatibility)) {
gl->fGetIntegerv(pname, &i);
} else {
i = LOCAL_GL_UNSIGNED_BYTE;
}
return JS::NumberValue(uint32_t(i));
}
case LOCAL_GL_IMPLEMENTATION_COLOR_READ_FORMAT: {
if (mBoundReadFramebuffer) {
FBStatus status = mBoundReadFramebuffer->CheckFramebufferStatus();
if (status != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
ErrorInvalidOperation("getParameter: Read framebuffer must be"
" complete before querying"
" IMPLEMENTATION_COLOR_READ_FORMAT.");
return JS::NullValue();
}
}
GLint i = 0;
if (gl->IsSupported(gl::GLFeature::ES2_compatibility)) {
gl->fGetIntegerv(pname, &i);
} else {
i = LOCAL_GL_RGBA;
}
return JS::NumberValue(uint32_t(i));
}
// int
case LOCAL_GL_STENCIL_REF:
case LOCAL_GL_STENCIL_BACK_REF: {
GLint stencilBits = 0;
if (!GetStencilBits(&stencilBits))
return JS::NullValue();
// Assuming stencils have 8 bits
const GLint stencilMask = (1 << stencilBits) - 1;
GLint refValue = 0;
gl->fGetIntegerv(pname, &refValue);
return JS::Int32Value(refValue & stencilMask);
}
case LOCAL_GL_STENCIL_BITS: {
GLint stencilBits = 0;
GetStencilBits(&stencilBits);
return JS::Int32Value(stencilBits);
}
case LOCAL_GL_STENCIL_CLEAR_VALUE:
case LOCAL_GL_UNPACK_ALIGNMENT:
case LOCAL_GL_PACK_ALIGNMENT:
case LOCAL_GL_SUBPIXEL_BITS:
case LOCAL_GL_SAMPLE_BUFFERS:
case LOCAL_GL_SAMPLES:
case LOCAL_GL_MAX_VERTEX_ATTRIBS:
case LOCAL_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
case LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
case LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS:
case LOCAL_GL_RED_BITS:
case LOCAL_GL_GREEN_BITS:
case LOCAL_GL_BLUE_BITS:
case LOCAL_GL_DEPTH_BITS: {
GLint i = 0;
gl->fGetIntegerv(pname, &i);
return JS::Int32Value(i);
}
case LOCAL_GL_ALPHA_BITS: {
GLint i = 0;
if (!mNeedsFakeNoAlpha) {
gl->fGetIntegerv(pname, &i);
}
return JS::Int32Value(i);
}
case LOCAL_GL_MAX_TEXTURE_SIZE:
return JS::Int32Value(mGLMaxTextureSize);
case LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE:
return JS::Int32Value(mGLMaxCubeMapTextureSize);
case LOCAL_GL_MAX_RENDERBUFFER_SIZE:
return JS::Int32Value(mGLMaxRenderbufferSize);
case LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS:
return JS::Int32Value(mGLMaxVertexUniformVectors);
case LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
return JS::Int32Value(mGLMaxFragmentUniformVectors);
case LOCAL_GL_MAX_VARYING_VECTORS:
return JS::Int32Value(mGLMaxVaryingVectors);
case LOCAL_GL_NUM_COMPRESSED_TEXTURE_FORMATS:
return JS::Int32Value(0);
case LOCAL_GL_COMPRESSED_TEXTURE_FORMATS: {
uint32_t length = mCompressedTextureFormats.Length();
JSObject* obj = dom::Uint32Array::Create(cx, this, length,
mCompressedTextureFormats.Elements());
if (!obj) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
return JS::ObjectOrNullValue(obj);
}
// unsigned int. here we may have to return very large values like 2^32-1 that can't be represented as
// javascript integer values. We just return them as doubles and javascript doesn't care.
case LOCAL_GL_STENCIL_BACK_VALUE_MASK:
return JS::DoubleValue(mStencilValueMaskBack); // pass as FP value to allow large values such as 2^32-1.
case LOCAL_GL_STENCIL_BACK_WRITEMASK:
return JS::DoubleValue(mStencilWriteMaskBack);
case LOCAL_GL_STENCIL_VALUE_MASK:
return JS::DoubleValue(mStencilValueMaskFront);
case LOCAL_GL_STENCIL_WRITEMASK:
return JS::DoubleValue(mStencilWriteMaskFront);
// float
case LOCAL_GL_DEPTH_CLEAR_VALUE:
case LOCAL_GL_LINE_WIDTH:
case LOCAL_GL_POLYGON_OFFSET_FACTOR:
case LOCAL_GL_POLYGON_OFFSET_UNITS:
case LOCAL_GL_SAMPLE_COVERAGE_VALUE: {
GLfloat f = 0.f;
gl->fGetFloatv(pname, &f);
return JS::DoubleValue(f);
}
// bool
case LOCAL_GL_BLEND:
case LOCAL_GL_DEPTH_TEST:
case LOCAL_GL_STENCIL_TEST:
case LOCAL_GL_CULL_FACE:
case LOCAL_GL_DITHER:
case LOCAL_GL_POLYGON_OFFSET_FILL:
case LOCAL_GL_SCISSOR_TEST:
case LOCAL_GL_SAMPLE_COVERAGE_INVERT:
case LOCAL_GL_DEPTH_WRITEMASK: {
realGLboolean b = 0;
gl->fGetBooleanv(pname, &b);
return JS::BooleanValue(bool(b));
}
// bool, WebGL-specific
case UNPACK_FLIP_Y_WEBGL:
return JS::BooleanValue(mPixelStoreFlipY);
case UNPACK_PREMULTIPLY_ALPHA_WEBGL:
return JS::BooleanValue(mPixelStorePremultiplyAlpha);
// uint, WebGL-specific
case UNPACK_COLORSPACE_CONVERSION_WEBGL:
return JS::NumberValue(uint32_t(mPixelStoreColorspaceConversion));
////////////////////////////////
// Complex values
// 2 floats
case LOCAL_GL_DEPTH_RANGE:
case LOCAL_GL_ALIASED_POINT_SIZE_RANGE:
case LOCAL_GL_ALIASED_LINE_WIDTH_RANGE: {
GLfloat fv[2] = { 0 };
gl->fGetFloatv(pname, fv);
JSObject* obj = dom::Float32Array::Create(cx, this, 2, fv);
if (!obj) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
return JS::ObjectOrNullValue(obj);
}
// 4 floats
case LOCAL_GL_COLOR_CLEAR_VALUE:
case LOCAL_GL_BLEND_COLOR: {
GLfloat fv[4] = { 0 };
gl->fGetFloatv(pname, fv);
JSObject* obj = dom::Float32Array::Create(cx, this, 4, fv);
if (!obj) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
return JS::ObjectOrNullValue(obj);
}
// 2 ints
case LOCAL_GL_MAX_VIEWPORT_DIMS: {
GLint iv[2] = { 0 };
gl->fGetIntegerv(pname, iv);
JSObject* obj = dom::Int32Array::Create(cx, this, 2, iv);
if (!obj) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
return JS::ObjectOrNullValue(obj);
}
// 4 ints
case LOCAL_GL_SCISSOR_BOX:
case LOCAL_GL_VIEWPORT: {
GLint iv[4] = { 0 };
gl->fGetIntegerv(pname, iv);
JSObject* obj = dom::Int32Array::Create(cx, this, 4, iv);
if (!obj) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
return JS::ObjectOrNullValue(obj);
}
// 4 bools
case LOCAL_GL_COLOR_WRITEMASK: {
realGLboolean gl_bv[4] = { 0 };
gl->fGetBooleanv(pname, gl_bv);
bool vals[4] = { bool(gl_bv[0]), bool(gl_bv[1]),
bool(gl_bv[2]), bool(gl_bv[3]) };
JS::Rooted<JS::Value> arr(cx);
if (!dom::ToJSValue(cx, vals, &arr)) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
return arr;
}
case LOCAL_GL_ARRAY_BUFFER_BINDING: {
return WebGLObjectAsJSValue(cx, mBoundArrayBuffer.get(), rv);
}
case LOCAL_GL_ELEMENT_ARRAY_BUFFER_BINDING: {
return WebGLObjectAsJSValue(cx, mBoundVertexArray->mElementArrayBuffer.get(), rv);
}
case LOCAL_GL_RENDERBUFFER_BINDING: {
return WebGLObjectAsJSValue(cx, mBoundRenderbuffer.get(), rv);
}
// DRAW_FRAMEBUFFER_BINDING is the same as FRAMEBUFFER_BINDING.
case LOCAL_GL_FRAMEBUFFER_BINDING: {
return WebGLObjectAsJSValue(cx, mBoundDrawFramebuffer.get(), rv);
}
case LOCAL_GL_CURRENT_PROGRAM: {
return WebGLObjectAsJSValue(cx, mCurrentProgram.get(), rv);
}
case LOCAL_GL_TEXTURE_BINDING_2D: {
return WebGLObjectAsJSValue(cx, mBound2DTextures[mActiveTexture].get(), rv);
}
case LOCAL_GL_TEXTURE_BINDING_CUBE_MAP: {
return WebGLObjectAsJSValue(cx, mBoundCubeMapTextures[mActiveTexture].get(), rv);
}
default:
break;
}
ErrorInvalidEnumInfo("getParameter: parameter", pname);
return JS::NullValue();
}
bool
WebGLContext::DrawElements_check(GLsizei count, GLenum type,
WebGLintptr byteOffset, GLsizei primcount,
const char* info, GLuint* out_upperBound)
{
if (count < 0 || byteOffset < 0) {
ErrorInvalidValue("%s: negative count or offset", info);
return false;
}
if (primcount < 0) {
ErrorInvalidValue("%s: negative primcount", info);
return false;
}
if (!ValidateStencilParamsForDrawCall()) {
return false;
}
// If count is 0, there's nothing to do.
if (count == 0 || primcount == 0)
return false;
uint8_t bytesPerElem = 0;
switch (type) {
case LOCAL_GL_UNSIGNED_BYTE:
bytesPerElem = 1;
break;
case LOCAL_GL_UNSIGNED_SHORT:
bytesPerElem = 2;
break;
case LOCAL_GL_UNSIGNED_INT:
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_element_index_uint)) {
bytesPerElem = 4;
}
break;
}
if (!bytesPerElem) {
ErrorInvalidEnum("%s: Invalid `type`: 0x%04x", info, type);
return false;
}
if (byteOffset % bytesPerElem != 0) {
ErrorInvalidOperation("%s: `byteOffset` must be a multiple of the size of `type`",
info);
return false;
}
const GLsizei first = byteOffset / bytesPerElem;
const CheckedUint32 checked_byteCount = bytesPerElem * CheckedUint32(count);
if (!checked_byteCount.isValid()) {
ErrorInvalidValue("%s: overflow in byteCount", info);
return false;
}
// Any checks below this depend on a program being available.
if (!mCurrentProgram) {
ErrorInvalidOperation("%s: null CURRENT_PROGRAM", info);
return false;
}
if (!mBoundVertexArray->mElementArrayBuffer) {
ErrorInvalidOperation("%s: must have element array buffer binding", info);
return false;
}
WebGLBuffer& elemArrayBuffer = *mBoundVertexArray->mElementArrayBuffer;
if (!elemArrayBuffer.ByteLength()) {
ErrorInvalidOperation("%s: bound element array buffer doesn't have any data", info);
return false;
}
CheckedInt<GLsizei> checked_neededByteCount = checked_byteCount.toChecked<GLsizei>() + byteOffset;
if (!checked_neededByteCount.isValid()) {
ErrorInvalidOperation("%s: overflow in byteOffset+byteCount", info);
return false;
}
if (uint32_t(checked_neededByteCount.value()) > elemArrayBuffer.ByteLength()) {
ErrorInvalidOperation("%s: bound element array buffer is too small for given count and offset", info);
return false;
}
if (!ValidateBufferFetching(info))
return false;
if (!mMaxFetchedVertices ||
!elemArrayBuffer.Validate(type, mMaxFetchedVertices - 1, first, count, out_upperBound))
{
ErrorInvalidOperation(
"%s: bound vertex attribute buffers do not have sufficient "
"size for given indices from the bound element array", info);
return false;
}
if (uint32_t(primcount) > mMaxFetchedInstances) {
ErrorInvalidOperation("%s: bound instance attribute buffers do not have sufficient size for given primcount", info);
return false;
}
// Bug 1008310 - Check if buffer has been used with a different previous type
if (elemArrayBuffer.IsElementArrayUsedWithMultipleTypes()) {
GenerateWarning("%s: bound element array buffer previously used with a type other than "
"%s, this will affect performance.",
info,
WebGLContext::EnumName(type));
}
MOZ_ASSERT(gl->IsCurrent());
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments(info))
return false;
} else {
ClearBackbufferIfNeeded();
}
if (!DoFakeVertexAttrib0(mMaxFetchedVertices)) {
return false;
}
return true;
}
void
WebGLContext::AssertCachedBindings()
{
#ifdef DEBUG
MakeContextCurrent();
GetAndFlushUnderlyingGLErrors();
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_vertex_array_object)) {
GLuint bound = mBoundVertexArray ? mBoundVertexArray->GLName() : 0;
AssertUintParamCorrect(gl, LOCAL_GL_VERTEX_ARRAY_BINDING, bound);
}
// Framebuffers
if (IsWebGL2()) {
GLuint bound = mBoundDrawFramebuffer ? mBoundDrawFramebuffer->mGLName
: 0;
AssertUintParamCorrect(gl, LOCAL_GL_DRAW_FRAMEBUFFER_BINDING, bound);
bound = mBoundReadFramebuffer ? mBoundReadFramebuffer->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_READ_FRAMEBUFFER_BINDING, bound);
} else {
MOZ_ASSERT(mBoundDrawFramebuffer == mBoundReadFramebuffer);
GLuint bound = mBoundDrawFramebuffer ? mBoundDrawFramebuffer->mGLName
: 0;
AssertUintParamCorrect(gl, LOCAL_GL_FRAMEBUFFER_BINDING, bound);
}
GLint stencilBits = 0;
if (GetStencilBits(&stencilBits)) { // Depends on current draw framebuffer.
const GLuint stencilRefMask = (1 << stencilBits) - 1;
AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_REF, stencilRefMask, mStencilRefFront);
AssertMaskedUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_REF, stencilRefMask, mStencilRefBack);
}
// Program
GLuint bound = mCurrentProgram ? mCurrentProgram->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_CURRENT_PROGRAM, bound);
// Textures
GLenum activeTexture = mActiveTexture + LOCAL_GL_TEXTURE0;
AssertUintParamCorrect(gl, LOCAL_GL_ACTIVE_TEXTURE, activeTexture);
WebGLTexture* curTex = ActiveBoundTextureForTarget(LOCAL_GL_TEXTURE_2D);
bound = curTex ? curTex->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_TEXTURE_BINDING_2D, bound);
curTex = ActiveBoundTextureForTarget(LOCAL_GL_TEXTURE_CUBE_MAP);
bound = curTex ? curTex->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_TEXTURE_BINDING_CUBE_MAP, bound);
// Buffers
bound = mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_ARRAY_BUFFER_BINDING, bound);
MOZ_ASSERT(mBoundVertexArray);
WebGLBuffer* curBuff = mBoundVertexArray->mElementArrayBuffer;
bound = curBuff ? curBuff->mGLName : 0;
AssertUintParamCorrect(gl, LOCAL_GL_ELEMENT_ARRAY_BUFFER_BINDING, bound);
MOZ_ASSERT(!GetAndFlushUnderlyingGLErrors());
#endif
// We do not check the renderbuffer binding, because we never rely on it matching.
}
void TranslatorGLSL::translate(TIntermNode *root, ShCompileOptions compileOptions)
{
TInfoSinkBase& sink = getInfoSink().obj;
// Write GLSL version.
writeVersion(root);
// Write extension behaviour as needed
writeExtensionBehavior(root);
// Write pragmas after extensions because some drivers consider pragmas
// like non-preprocessor tokens.
writePragma(compileOptions);
// If flattening the global invariant pragma, write invariant declarations for built-in
// variables. It should be harmless to do this twice in the case that the shader also explicitly
// did this. However, it's important to emit invariant qualifiers only for those built-in
// variables that are actually used, to avoid affecting the behavior of the shader.
if ((compileOptions & SH_FLATTEN_PRAGMA_STDGL_INVARIANT_ALL) && getPragma().stdgl.invariantAll)
{
ASSERT(wereVariablesCollected());
switch (getShaderType())
{
case GL_VERTEX_SHADER:
sink << "invariant gl_Position;\n";
// gl_PointSize should be declared invariant in both ESSL 1.00 and 3.00 fragment
// shaders if it's statically referenced.
conditionallyOutputInvariantDeclaration("gl_PointSize");
break;
case GL_FRAGMENT_SHADER:
// The preprocessor will reject this pragma if it's used in ESSL 3.00 fragment
// shaders, so we can use simple logic to determine whether to declare these
// variables invariant.
conditionallyOutputInvariantDeclaration("gl_FragCoord");
conditionallyOutputInvariantDeclaration("gl_PointCoord");
break;
default:
// Currently not reached, but leave this in for future expansion.
ASSERT(false);
break;
}
}
if ((compileOptions & SH_REWRITE_TEXELFETCHOFFSET_TO_TEXELFETCH) != 0)
{
sh::RewriteTexelFetchOffset(root, getSymbolTable(), getShaderVersion());
}
bool precisionEmulation = getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;
if (precisionEmulation)
{
EmulatePrecision emulatePrecision(getSymbolTable(), getShaderVersion());
root->traverse(&emulatePrecision);
emulatePrecision.updateTree();
emulatePrecision.writeEmulationHelpers(sink, getShaderVersion(), getOutputType());
}
// Write emulated built-in functions if needed.
if (!getBuiltInFunctionEmulator().IsOutputEmpty())
{
sink << "// BEGIN: Generated code for built-in function emulation\n\n";
sink << "#define webgl_emu_precision\n\n";
getBuiltInFunctionEmulator().OutputEmulatedFunctions(sink);
sink << "// END: Generated code for built-in function emulation\n\n";
}
// Write array bounds clamping emulation if needed.
getArrayBoundsClamper().OutputClampingFunctionDefinition(sink);
// Declare gl_FragColor and glFragData as webgl_FragColor and webgl_FragData
// if it's core profile shaders and they are used.
if (getShaderType() == GL_FRAGMENT_SHADER)
{
const bool mayHaveESSL1SecondaryOutputs =
IsExtensionEnabled(getExtensionBehavior(), "GL_EXT_blend_func_extended") &&
getShaderVersion() == 100;
const bool declareGLFragmentOutputs = IsGLSL130OrNewer(getOutputType());
bool hasGLFragColor = false;
bool hasGLFragData = false;
bool hasGLSecondaryFragColor = false;
bool hasGLSecondaryFragData = false;
for (const auto &outputVar : outputVariables)
{
if (declareGLFragmentOutputs)
{
if (outputVar.name == "gl_FragColor")
{
ASSERT(!hasGLFragColor);
hasGLFragColor = true;
continue;
}
else if (outputVar.name == "gl_FragData")
{
ASSERT(!hasGLFragData);
hasGLFragData = true;
continue;
}
}
if (mayHaveESSL1SecondaryOutputs)
{
if (outputVar.name == "gl_SecondaryFragColorEXT")
{
ASSERT(!hasGLSecondaryFragColor);
hasGLSecondaryFragColor = true;
continue;
}
else if (outputVar.name == "gl_SecondaryFragDataEXT")
{
ASSERT(!hasGLSecondaryFragData);
hasGLSecondaryFragData = true;
continue;
}
}
}
ASSERT(!((hasGLFragColor || hasGLSecondaryFragColor) &&
(hasGLFragData || hasGLSecondaryFragData)));
if (hasGLFragColor)
{
sink << "out vec4 webgl_FragColor;\n";
}
if (hasGLFragData)
{
sink << "out vec4 webgl_FragData[gl_MaxDrawBuffers];\n";
}
if (hasGLSecondaryFragColor)
{
sink << "out vec4 angle_SecondaryFragColor;\n";
}
if (hasGLSecondaryFragData)
{
sink << "out vec4 angle_SecondaryFragData[" << getResources().MaxDualSourceDrawBuffers
<< "];\n";
}
}
if (getShaderType() == GL_COMPUTE_SHADER && isComputeShaderLocalSizeDeclared())
{
const sh::WorkGroupSize &localSize = getComputeShaderLocalSize();
sink << "layout (local_size_x=" << localSize[0] << ", local_size_y=" << localSize[1]
<< ", local_size_z=" << localSize[2] << ") in;\n";
}
// Write translated shader.
TOutputGLSL outputGLSL(sink, getArrayIndexClampingStrategy(), getHashFunction(), getNameMap(),
getSymbolTable(), getShaderType(), getShaderVersion(), getOutputType(),
compileOptions);
root->traverse(&outputGLSL);
}
void
WebGLContext::EnableExtension(WebGLExtensionID ext)
{
MOZ_ASSERT(IsExtensionEnabled(ext) == false);
WebGLExtensionBase* obj = nullptr;
switch (ext) {
// ANGLE_
case WebGLExtensionID::ANGLE_instanced_arrays:
obj = new WebGLExtensionInstancedArrays(this);
break;
// EXT_
case WebGLExtensionID::EXT_blend_minmax:
obj = new WebGLExtensionBlendMinMax(this);
break;
case WebGLExtensionID::EXT_color_buffer_float:
obj = new WebGLExtensionEXTColorBufferFloat(this);
break;
case WebGLExtensionID::EXT_color_buffer_half_float:
obj = new WebGLExtensionColorBufferHalfFloat(this);
break;
case WebGLExtensionID::EXT_disjoint_timer_query:
obj = new WebGLExtensionDisjointTimerQuery(this);
break;
case WebGLExtensionID::EXT_frag_depth:
obj = new WebGLExtensionFragDepth(this);
break;
case WebGLExtensionID::EXT_shader_texture_lod:
obj = new WebGLExtensionShaderTextureLod(this);
break;
case WebGLExtensionID::EXT_sRGB:
obj = new WebGLExtensionSRGB(this);
break;
case WebGLExtensionID::EXT_texture_filter_anisotropic:
obj = new WebGLExtensionTextureFilterAnisotropic(this);
break;
// MOZ_
case WebGLExtensionID::MOZ_debug:
obj = new WebGLExtensionMOZDebug(this);
break;
// OES_
case WebGLExtensionID::OES_element_index_uint:
obj = new WebGLExtensionElementIndexUint(this);
break;
case WebGLExtensionID::OES_standard_derivatives:
obj = new WebGLExtensionStandardDerivatives(this);
break;
case WebGLExtensionID::OES_texture_float:
obj = new WebGLExtensionTextureFloat(this);
break;
case WebGLExtensionID::OES_texture_float_linear:
obj = new WebGLExtensionTextureFloatLinear(this);
break;
case WebGLExtensionID::OES_texture_half_float:
obj = new WebGLExtensionTextureHalfFloat(this);
break;
case WebGLExtensionID::OES_texture_half_float_linear:
obj = new WebGLExtensionTextureHalfFloatLinear(this);
break;
case WebGLExtensionID::OES_vertex_array_object:
obj = new WebGLExtensionVertexArray(this);
break;
// WEBGL_
case WebGLExtensionID::WEBGL_color_buffer_float:
obj = new WebGLExtensionColorBufferFloat(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_astc:
obj = new WebGLExtensionCompressedTextureASTC(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_atc:
obj = new WebGLExtensionCompressedTextureATC(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_etc:
obj = new WebGLExtensionCompressedTextureES3(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_etc1:
obj = new WebGLExtensionCompressedTextureETC1(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_pvrtc:
obj = new WebGLExtensionCompressedTexturePVRTC(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_s3tc:
obj = new WebGLExtensionCompressedTextureS3TC(this);
break;
case WebGLExtensionID::WEBGL_compressed_texture_s3tc_srgb:
obj = new WebGLExtensionCompressedTextureS3TC_SRGB(this);
break;
case WebGLExtensionID::WEBGL_debug_renderer_info:
obj = new WebGLExtensionDebugRendererInfo(this);
break;
case WebGLExtensionID::WEBGL_debug_shaders:
obj = new WebGLExtensionDebugShaders(this);
break;
case WebGLExtensionID::WEBGL_depth_texture:
obj = new WebGLExtensionDepthTexture(this);
break;
case WebGLExtensionID::WEBGL_draw_buffers:
obj = new WebGLExtensionDrawBuffers(this);
break;
case WebGLExtensionID::WEBGL_lose_context:
obj = new WebGLExtensionLoseContext(this);
break;
default:
MOZ_ASSERT(false, "should not get there.");
}
mExtensions[ext] = obj;
}
JS::Value
WebGLContext::GetVertexAttrib(JSContext* cx, GLuint index, GLenum pname,
ErrorResult& rv)
{
const char funcName[] = "getVertexAttrib";
if (IsContextLost())
return JS::NullValue();
if (!ValidateAttribIndex(index, funcName))
return JS::NullValue();
MOZ_ASSERT(mBoundVertexArray);
MakeContextCurrent();
switch (pname) {
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
return WebGLObjectAsJSValue(cx, mBoundVertexArray->mAttribs[index].mBuf.get(), rv);
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_STRIDE:
return JS::Int32Value(mBoundVertexArray->mAttribs[index].Stride());
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE:
return JS::Int32Value(mBoundVertexArray->mAttribs[index].Size());
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE:
return JS::Int32Value(mBoundVertexArray->mAttribs[index].Type());
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_INTEGER:
if (IsWebGL2())
return JS::BooleanValue(mBoundVertexArray->mAttribs[index].IntegerFunc());
break;
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
if (IsWebGL2() ||
IsExtensionEnabled(WebGLExtensionID::ANGLE_instanced_arrays))
{
return JS::Int32Value(mBoundVertexArray->mAttribs[index].mDivisor);
}
break;
case LOCAL_GL_CURRENT_VERTEX_ATTRIB:
{
JS::RootedObject obj(cx);
switch (mGenericVertexAttribTypes[index]) {
case LOCAL_GL_FLOAT:
obj = GetVertexAttribFloat32Array(cx, index);
break;
case LOCAL_GL_INT:
obj = GetVertexAttribInt32Array(cx, index);
break;
case LOCAL_GL_UNSIGNED_INT:
obj = GetVertexAttribUint32Array(cx, index);
break;
}
if (!obj)
rv.Throw(NS_ERROR_OUT_OF_MEMORY);
return JS::ObjectOrNullValue(obj);
}
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED:
return JS::BooleanValue(mBoundVertexArray->mAttribs[index].mEnabled);
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
return JS::BooleanValue(mBoundVertexArray->mAttribs[index].Normalized());
default:
break;
}
ErrorInvalidEnumInfo("getVertexAttrib: parameter", pname);
return JS::NullValue();
}
