void
WebGL2Context::UniformMatrix2x3fv_base(WebGLUniformLocation* loc, bool transpose,
size_t arrayLength, const GLfloat* data)
{
GLuint rawLoc;
GLsizei numElementsToUpload;
if (!ValidateUniformMatrixArraySetter(loc, 2, 3, LOCAL_GL_FLOAT, arrayLength,
transpose, "uniformMatrix2x3fv",
&rawLoc, &numElementsToUpload))
{
return;
}
MakeContextCurrent();
gl->fUniformMatrix2x3fv(rawLoc, numElementsToUpload, transpose, data);
}
void
WebGLContext::BufferData(GLenum target, WebGLsizeiptr size, GLenum usage)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(target, "bufferData"))
return;
WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
if (size < 0)
return ErrorInvalidValue("bufferData: negative size");
if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
return;
// careful: WebGLsizeiptr is always 64-bit, but GLsizeiptr is like intptr_t.
if (!CheckedInt<GLsizeiptr>(size).isValid())
return ErrorOutOfMemory("bufferData: bad size");
WebGLBuffer* boundBuffer = bufferSlot.get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
UniquePtr<uint8_t> zeroBuffer((uint8_t*)calloc(size, 1));
if (!zeroBuffer)
return ErrorOutOfMemory("bufferData: out of memory");
MakeContextCurrent();
InvalidateBufferFetching();
GLenum error = CheckedBufferData(target, size, zeroBuffer.get(), usage);
if (error) {
GenerateWarning("bufferData generated error %s", ErrorName(error));
return;
}
boundBuffer->SetByteLength(size);
if (!boundBuffer->ElementArrayCacheBufferData(nullptr, size)) {
return ErrorOutOfMemory("bufferData: out of memory");
}
}
void
WebGLContext::BufferSubDataT(GLenum target,
WebGLsizeiptr byteOffset,
const BufferT& data)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(target, "bufferSubData"))
return;
WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
if (byteOffset < 0)
return ErrorInvalidValue("bufferSubData: negative offset");
WebGLBuffer* boundBuffer = bufferSlot.get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
data.ComputeLengthAndData();
CheckedInt<WebGLsizeiptr> checked_neededByteLength =
CheckedInt<WebGLsizeiptr>(byteOffset) + data.Length();
if (!checked_neededByteLength.isValid()) {
ErrorInvalidValue("bufferSubData: Integer overflow computing the needed"
" byte length.");
return;
}
if (checked_neededByteLength.value() > boundBuffer->ByteLength()) {
ErrorInvalidValue("bufferSubData: Not enough data. Operation requires"
" %d bytes, but buffer only has %d bytes.",
checked_neededByteLength.value(),
boundBuffer->ByteLength());
return;
}
boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.Data(),
data.Length());
MakeContextCurrent();
gl->fBufferSubData(target, byteOffset, data.Length(), data.Data());
}
bool
WebGL2Context::IsSampler(WebGLSampler* sampler)
{
if (IsContextLost())
return false;
if (!sampler)
return false;
if (!ValidateObjectAllowDeleted("isSampler", sampler))
return false;
if (sampler->IsDeleted())
return false;
MakeContextCurrent();
return gl->fIsSampler(sampler->mGLName);
}
bool
WebGLContext::IsVertexArray(WebGLVertexArray* array)
{
if (IsContextLost())
return false;
if (!array)
return false;
if (!ValidateObjectAllowDeleted("isVertexArray", array))
return false;
if (array->IsDeleted())
return false;
MakeContextCurrent();
return array->IsVertexArray();
}
void
WebGL2Context::ResumeTransformFeedback()
{
if (IsContextLost())
return;
WebGLTransformFeedback* tf = mBoundTransformFeedback;
MOZ_ASSERT(tf);
if (!tf)
return;
if (!tf->mIsActive || !tf->mIsPaused)
return ErrorInvalidOperation("resumeTransformFeedback: transform feedback is not active or is not paused");
MakeContextCurrent();
gl->fResumeTransformFeedback();
tf->mIsPaused = false;
}
void
WebGLContext::BindTexture(GLenum rawTarget, WebGLTexture* newTex)
{
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull("bindTexture", newTex))
return;
// Need to check rawTarget first before comparing against newTex->Target() as
// newTex->Target() returns a TexTarget, which will assert on invalid value.
WebGLRefPtr<WebGLTexture>* currentTexPtr = nullptr;
switch (rawTarget) {
case LOCAL_GL_TEXTURE_2D:
currentTexPtr = &mBound2DTextures[mActiveTexture];
break;
case LOCAL_GL_TEXTURE_CUBE_MAP:
currentTexPtr = &mBoundCubeMapTextures[mActiveTexture];
break;
case LOCAL_GL_TEXTURE_3D:
if (!IsWebGL2())
return ErrorInvalidEnum("bindTexture: target TEXTURE_3D is only available in WebGL version 2.0 or newer");
currentTexPtr = &mBound3DTextures[mActiveTexture];
break;
default:
return ErrorInvalidEnumInfo("bindTexture: target", rawTarget);
}
const TexTarget texTarget(rawTarget);
MakeContextCurrent();
if (newTex && !newTex->BindTexture(texTarget))
return;
if (!newTex) {
gl->fBindTexture(texTarget.get(), 0);
}
*currentTexPtr = newTex;
}
void
WebGL2Context::ReadBuffer(GLenum mode)
{
if (IsContextLost())
return;
const bool isColorAttachment = (mode >= LOCAL_GL_COLOR_ATTACHMENT0 &&
mode <= LastColorAttachmentEnum());
if (mode != LOCAL_GL_NONE && mode != LOCAL_GL_BACK && !isColorAttachment) {
ErrorInvalidEnum("readBuffer: `mode` must be one of NONE, BACK, or "
"COLOR_ATTACHMENTi. Was %s",
EnumName(mode));
return;
}
if (mBoundReadFramebuffer) {
if (mode != LOCAL_GL_NONE &&
!isColorAttachment)
{
ErrorInvalidOperation("readBuffer: If READ_FRAMEBUFFER is non-null, `mode` "
"must be COLOR_ATTACHMENTi or NONE. Was %s",
EnumName(mode));
return;
}
MakeContextCurrent();
mBoundReadFramebuffer->SetReadBufferMode(mode);
gl->fReadBuffer(mode);
return;
}
// Operating on the default framebuffer.
if (mode != LOCAL_GL_NONE &&
mode != LOCAL_GL_BACK)
{
ErrorInvalidOperation("readBuffer: If READ_FRAMEBUFFER is null, `mode`"
" must be BACK or NONE. Was %s",
EnumName(mode));
return;
}
gl->Screen()->SetReadBuffer(mode);
}
Window::Window(const int2 & dimensions, const char * title)
{
if(glfwInit() == GL_FALSE) throw std::runtime_error("glfwInit() failed.");
window = glfwCreateWindow(dimensions.x, dimensions.y, title, nullptr, nullptr);
if(window == nullptr) throw std::runtime_error("glfwCreateWindow(...) failed.");
glfwSetWindowUserPointer(window, this);
glfwSetKeyCallback(window, OnKey);
const uint32_t compressedFont[] = {
0,0x18,0,0,0x660000,0xc000018,0,0,0x36661800,0xc1c003e,0xc30,0x40000000,0x36663c00,0xc360063,0x1818,0x60000000,0x7f243c00,0x6364343,0x1866300c,0x30000000,0x36003c00,0x1c6303,0x183c300c,
0x18000000,0x36001800,0x6e303e,0x7eff300c,0xc007f00,0x36001800,0x3b1860,0x183c300c,0x6000000,0x7f000000,0x330c61,0x1866300c,0x3000018,0x36001800,0x336663,0x1818,0x1180018,0x36001800,
0x6e633e,0xc30,0x180018,0,0x18,0,0xc,0,0x18,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x3e3e183e,0x7f1c7f30,0x3e3e,0x3e060060,0x63631c63,0x63060338,0x18186363,0x630c0030,0x60601e73,0x6003033c,0x18186363,
0x63180018,0x6030187b,0x30030336,0x6363,0x30307e0c,0x3c18186f,0x183f3f33,0x7e3e,0x18600006,0x600c1867,0xc63607f,0x6063,0x1830000c,0x60061863,0xc636030,0x18186063,0x187e18,0x63631863,
0xc636330,0x18183063,0x180c0030,0x3e7f7e3e,0xc3e3e78,0xc001e3e,0x18060060,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x3c3f083e,0x3c7f7f1f,0x67783c63,0x1c63630f,0x66661c63,0x66666636,
0x66301863,0x36677706,0x43663663,0x43464666,0x36301863,0x636f7f06,0x366637b,0x3161666,0x36301863,0x637f7f06,0x33e637b,0x31e1e66,0x1e30187f,0x637b6b06,0x3667f7b,0x7b161666,0x36301863,
0x63736306,0x4366633b,0x63064666,0x36331863,0x63636346,0x66666303,0x66066636,0x66331863,0x36636366,0x3c3f633e,0x5c0f7f1f,0x671e3c63,0x1c63637f,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x80000,0,0,0,
0x1c0000,0x3e3f3e3f,0x6363637e,0x3c7f6663,0x363c01,0x63666366,0x6363637e,0xc636663,0x633003,0x63666366,0x6363635a,0xc316636,0x3007,0x6666366,0x63636318,0xc18661c,0x300e,0x1c3e633e,
0x6b636318,0xc0c3c1c,0x301c,0x30366b06,0x6b636318,0xc06181c,0x3038,0x63667b06,0x7f366318,0xc431836,0x3070,0x63663e06,0x3e1c6318,0xc631863,0x3060,0x3e67300f,0x36083e3c,0x3c7f3c63,0x3c40,
0x7000,0,0,0,0,0,0,0xff000000,0,0,0,0,0xc,0,0,0,0xc,0,0,0,0x70018,0x1c0038,0x7601807,0x1c,0x60000,0x360030,0x6601806,0x18,0x60000,0x260030,0x6000006,0x18,0x3e1e1e00,0x6e063e3c,0x66701c36,
0x3e3b3718,0x63363000,0x330f6336,0x3660186e,0x63667f18,0x3663e00,0x33067f33,0x1e601866,0x63666b18,0x3663300,0x33060333,0x36601866,0x63666b18,0x63663300,0x3e066333,0x66601866,0x63666b18,
0x3e3e6e00,0x300f3e6e,0x67663c67,0x3e66633c,0,0x33000000,0x660000,0,0,0x1e000000,0x3c0000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0x8,0x70000000,0x6e0e18,0,0xc,0x18000000,0x3b1818,0,0xc,0x18000000,
0x1818,0x3e3b6e3b,0x6366333f,0x187f6363,0x1818,0x636e3366,0x6366330c,0xe336336,0x7000,0xe663366,0x6b66330c,0x1818631c,0x1818,0x38063366,0x6b66330c,0x180c631c,0x1818,0x63063e3e,0x7f3c336c,
0x18667e36,0x1818,0x3e0f3006,0x36186e38,0x707f6063,0xe18,0x3006,0,0x3000,0,0x780f,0,0x1f00 };
uint8_t fontPixels[128*128] = {};
auto out = fontPixels;
for(auto num : compressedFont)
{
for(int i=0; i<32; ++i)
{
*out++ = num & (1 << i) ? 255 : 0;
}
}
MakeContextCurrent();
glGenTextures(1, &fontTexture);
glBindTexture(GL_TEXTURE_2D, fontTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 128, 128, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, fontPixels);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glBindTexture(GL_TEXTURE_2D, 0);
}
void
WebGLContext::Enable(GLenum cap)
{
if (IsContextLost())
return;
if (!ValidateCapabilityEnum(cap, "enable"))
return;
realGLboolean* trackingSlot = GetStateTrackingSlot(cap);
if (trackingSlot)
{
*trackingSlot = 1;
}
MakeContextCurrent();
gl->fEnable(cap);
}
void
WebGL2Context::EndQuery(GLenum target)
{
if (IsContextLost())
return;
if (!ValidateQueryTarget(target, "endQuery"))
return;
WebGLRefPtr<WebGLQuery>& querySlot = GetQuerySlotByTarget(target);
WebGLQuery* activeQuery = querySlot.get();
if (!activeQuery || target != activeQuery->mType)
{
/* From GLES's EXT_occlusion_query_boolean:
* marks the end of the sequence of commands to be tracked for the
* query type given by <target>. The active query object for
* <target> is updated to indicate that query results are not
* available, and the active query object name for <target> is reset
* to zero. When the commands issued prior to EndQueryEXT have
* completed and a final query result is available, the query object
* active when EndQueryEXT is called is updated by the GL. The query
* object is updated to indicate that the query results are
* available and to contain the query result. If the active query
* object name for <target> is zero when EndQueryEXT is called, the
* error INVALID_OPERATION is generated.
*/
ErrorInvalidOperation("endQuery: There is no active query of type %s.",
GetQueryTargetEnumString(target));
return;
}
MakeContextCurrent();
if (target == LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN) {
gl->fEndQuery(LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN);
} else {
gl->fEndQuery(SimulateOcclusionQueryTarget(gl, target));
}
UpdateBoundQuery(target, nullptr);
NS_DispatchToCurrentThread(new WebGLQuery::AvailableRunnable(activeQuery));
}
void
WebGLContext::DisableVertexAttribArray(GLuint index)
{
if (IsContextLost())
return;
if (!ValidateAttribIndex(index, "disableVertexAttribArray"))
return;
MakeContextCurrent();
InvalidateBufferFetching();
if (index || !gl->IsCompatibilityProfile()) {
gl->fDisableVertexAttribArray(index);
}
MOZ_ASSERT(mBoundVertexArray);
mBoundVertexArray->mAttribs[index].mEnabled = false;
}
void
WebGLContext::BufferDataT(GLenum target,
const BufferT& data,
GLenum usage)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(target, "bufferData"))
return;
const WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
data.ComputeLengthAndData();
// Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
// is like intptr_t.
if (!CheckedInt<GLsizeiptr>(data.Length()).isValid())
return ErrorOutOfMemory("bufferData: bad size");
if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
return;
WebGLBuffer* boundBuffer = bufferSlot.get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
MakeContextCurrent();
InvalidateBufferFetching();
GLenum error = CheckedBufferData(target, data.Length(), data.Data(), usage);
if (error) {
GenerateWarning("bufferData generated error %s", ErrorName(error));
return;
}
boundBuffer->SetByteLength(data.Length());
if (!boundBuffer->ElementArrayCacheBufferData(data.Data(), data.Length()))
return ErrorOutOfMemory("bufferData: out of memory");
}
void
WebGL2Context::PauseTransformFeedback()
{
if (IsContextLost())
return;
WebGLTransformFeedback* tf = mBoundTransformFeedback;
MOZ_ASSERT(tf);
if (!tf)
return;
if (!tf->mIsActive || tf->mIsPaused) {
return ErrorInvalidOperation("%s: transform feedback is not active or is paused",
"pauseTransformFeedback");
}
MakeContextCurrent();
gl->fPauseTransformFeedback();
tf->mIsPaused = true;
}
void
WebGLContext::VertexAttribDivisor(GLuint index, GLuint divisor)
{
if (IsContextLost())
return;
if (!ValidateAttribIndex(index, "vertexAttribDivisor"))
return;
MOZ_ASSERT(mBoundVertexArray);
WebGLVertexAttribData& vd = mBoundVertexArray->mAttribs[index];
vd.mDivisor = divisor;
InvalidateBufferFetching();
MakeContextCurrent();
gl->fVertexAttribDivisor(index, divisor);
}
/* This doesn't belong here. It's part of state querying */
void
WebGL2Context::GetIndexedParameter(GLenum target, GLuint index,
dom::Nullable<dom::OwningWebGLBufferOrLongLong>& retval)
{
retval.SetNull();
if (IsContextLost())
return;
GLint64 data = 0;
MakeContextCurrent();
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
if (index >= mGLMaxTransformFeedbackSeparateAttribs)
return ErrorInvalidValue("getIndexedParameter: index should be less than "
"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
retval.SetValue().SetAsWebGLBuffer() =
mBoundTransformFeedbackBuffers[index].get();
return;
case LOCAL_GL_UNIFORM_BUFFER_BINDING:
if (index >= mGLMaxUniformBufferBindings)
return ErrorInvalidValue("getIndexedParameter: index should be than "
"MAX_UNIFORM_BUFFER_BINDINGS");
retval.SetValue().SetAsWebGLBuffer() = mBoundUniformBuffers[index].get();
return;
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_START:
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
case LOCAL_GL_UNIFORM_BUFFER_START:
case LOCAL_GL_UNIFORM_BUFFER_SIZE:
gl->fGetInteger64i_v(target, index, &data);
retval.SetValue().SetAsLongLong() = data;
return;
}
ErrorInvalidEnumInfo("getIndexedParameter: target", target);
}
void
WebGL2Context::EndTransformFeedback()
{
if (IsContextLost())
return;
WebGLTransformFeedback* tf = mBoundTransformFeedback;
MOZ_ASSERT(tf);
if (!tf)
return;
if (!tf->mIsActive)
return ErrorInvalidOperation("%s: transform feedback in not active",
"endTransformFeedback");
MakeContextCurrent();
gl->fEndTransformFeedback();
tf->mIsActive = false;
tf->mIsPaused = false;
}
void
WebGLContext::Clear(GLbitfield mask)
{
const char funcName[] = "clear";
if (IsContextLost())
return;
MakeContextCurrent();
uint32_t m = mask & (LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT | LOCAL_GL_STENCIL_BUFFER_BIT);
if (mask != m)
return ErrorInvalidValue("%s: invalid mask bits", funcName);
if (mask == 0) {
GenerateWarning("Calling gl.clear(0) has no effect.");
} else if (mRasterizerDiscardEnabled) {
GenerateWarning("Calling gl.clear() with RASTERIZER_DISCARD enabled has no effects.");
}
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments(funcName))
return;
gl->fClear(mask);
return;
} else {
ClearBackbufferIfNeeded();
}
// Ok, we're clearing the default framebuffer/screen.
{
ScopedMaskWorkaround autoMask(*this);
gl->fClear(mask);
}
Invalidate();
mShouldPresent = true;
}
void
WebGLContext::DrawElements(GLenum mode, GLsizei count, GLenum type,
WebGLintptr byteOffset)
{
const char funcName[] = "drawElements";
if (IsContextLost())
return;
if (!ValidateDrawModeEnum(mode, funcName))
return;
MakeContextCurrent();
bool error;
ScopedResolveTexturesForDraw scopedResolve(this, funcName, &error);
if (error)
return;
GLuint upperBound = 0;
if (!DrawElements_check(count, type, byteOffset, 1, funcName, &upperBound))
return;
RunContextLossTimer();
{
ScopedMaskWorkaround autoMask(*this);
if (gl->IsSupported(gl::GLFeature::draw_range_elements)) {
gl->fDrawRangeElements(mode, 0, upperBound, count, type,
reinterpret_cast<GLvoid*>(byteOffset));
} else {
gl->fDrawElements(mode, count, type,
reinterpret_cast<GLvoid*>(byteOffset));
}
}
Draw_cleanup(funcName);
}
void
WebGLContext::DrawArraysInstanced(GLenum mode, GLint first, GLsizei vertCount,
GLsizei instanceCount)
{
const char funcName[] = "drawArraysInstanced";
if (IsContextLost())
return;
MakeContextCurrent();
bool error = false;
ScopedResolveTexturesForDraw scopedResolve(this, funcName, &error);
if (error)
return;
if (!DrawArrays_check(funcName, mode, first, vertCount, instanceCount))
return;
if (!DrawInstanced_check(funcName))
return;
const ScopedDrawHelper scopedHelper(this, funcName, first, vertCount, instanceCount, &error);
if (error)
return;
const ScopedDrawWithTransformFeedback scopedTF(this, funcName, mode, vertCount,
instanceCount, &error);
if (error)
return;
{
ScopedDrawCallWrapper wrapper(*this);
gl->fDrawArraysInstanced(mode, first, vertCount, instanceCount);
}
Draw_cleanup(funcName);
scopedTF.Advance();
}
void
WebGL2Context::BindTransformFeedback(GLenum target, WebGLTransformFeedback* tf)
{
const char funcName[] = "bindTransformFeedback";
if (IsContextLost())
return;
if (target != LOCAL_GL_TRANSFORM_FEEDBACK)
return ErrorInvalidEnum("%s: `target` must be TRANSFORM_FEEDBACK.", funcName);
if (tf && !ValidateObject(funcName, *tf))
return;
if (mBoundTransformFeedback->mIsActive &&
!mBoundTransformFeedback->mIsPaused)
{
ErrorInvalidOperation("%s: Currently bound transform feedback is active and not"
" paused.",
funcName);
return;
}
////
if (mBoundTransformFeedback) {
mBoundTransformFeedback->AddBufferBindCounts(-1);
}
mBoundTransformFeedback = (tf ? tf : mDefaultTransformFeedback);
MakeContextCurrent();
gl->fBindTransformFeedback(target, mBoundTransformFeedback->mGLName);
if (mBoundTransformFeedback) {
mBoundTransformFeedback->AddBufferBindCounts(+1);
}
}
void
WebGLContext::DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type,
WebGLintptr byteOffset, GLsizei primcount)
{
const char funcName[] = "drawElementsInstanced";
if (IsContextLost())
return;
if (!ValidateDrawModeEnum(mode, funcName))
return;
MakeContextCurrent();
bool error;
ScopedResolveTexturesForDraw scopedResolve(this, funcName, &error);
if (error)
return;
GLuint upperBound = 0;
if (!DrawElements_check(count, type, byteOffset, primcount, funcName, &upperBound))
return;
if (!DrawInstanced_check(funcName))
return;
RunContextLossTimer();
{
ScopedMaskWorkaround autoMask(*this);
gl->fDrawElementsInstanced(mode, count, type,
reinterpret_cast<GLvoid*>(byteOffset),
primcount);
}
Draw_cleanup(funcName);
}
void
WebGLContext::ClearColor(GLfloat r, GLfloat g, GLfloat b, GLfloat a)
{
if (IsContextLost())
return;
MakeContextCurrent();
const bool supportsFloatColorBuffers = (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;
}
void
WebGL2Context::BeginTransformFeedback(GLenum primitiveMode)
{
if (IsContextLost())
return;
WebGLTransformFeedback* tf = mBoundTransformFeedback;
MOZ_ASSERT(tf);
if (!tf)
return;
if (tf->mIsActive)
return ErrorInvalidOperation("beginTransformFeedback: transform feedback is active");
const GLenum mode = tf->mMode;
if (mode != LOCAL_GL_POINTS && mode != LOCAL_GL_LINES && mode != LOCAL_GL_TRIANGLES)
return ErrorInvalidEnum("beginTransformFeedback: primitive must be one of POINTS, LINES, or TRIANGLES");
// TODO:
// GL_INVALID_OPERATION is generated by glBeginTransformFeedback
// if any binding point used in transform feedback mode does not
// have a buffer object bound. In interleaved mode, only the first
// buffer object binding point is ever written to.
// GL_INVALID_OPERATION is generated by glBeginTransformFeedback
// if no binding points would be used, either because no program
// object is active of because the active program object has
// specified no varying variables to record.
if (!mCurrentProgram)
return ErrorInvalidOperation("beginTransformFeedback: no program is active");
MakeContextCurrent();
gl->fBeginTransformFeedback(primitiveMode);
tf->mIsActive = true;
tf->mIsPaused = false;
}
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();
}
bool
WebGLContext::InitAndValidateGL()
{
if (!gl)
return false;
// Unconditionally create a new format usage authority. This is
// important when restoring contexts and extensions need to add
// formats back into the authority.
mFormatUsage = CreateFormatUsage(gl);
if (!mFormatUsage)
return false;
GLenum error = gl->fGetError();
if (error != LOCAL_GL_NO_ERROR) {
GenerateWarning("GL error 0x%x occurred during OpenGL context"
" initialization, before WebGL initialization!", error);
return false;
}
mMinCapability = gfxPrefs::WebGLMinCapabilityMode();
mDisableExtensions = gfxPrefs::WebGLDisableExtensions();
mLoseContextOnMemoryPressure = gfxPrefs::WebGLLoseContextOnMemoryPressure();
mCanLoseContextInForeground = gfxPrefs::WebGLCanLoseContextInForeground();
mRestoreWhenVisible = gfxPrefs::WebGLRestoreWhenVisible();
if (MinCapabilityMode())
mDisableFragHighP = true;
// These are the default values, see 6.2 State tables in the
// OpenGL ES 2.0.25 spec.
mColorWriteMask[0] = 1;
mColorWriteMask[1] = 1;
mColorWriteMask[2] = 1;
mColorWriteMask[3] = 1;
mDepthWriteMask = 1;
mColorClearValue[0] = 0.f;
mColorClearValue[1] = 0.f;
mColorClearValue[2] = 0.f;
mColorClearValue[3] = 0.f;
mDepthClearValue = 1.f;
mStencilClearValue = 0;
mStencilRefFront = 0;
mStencilRefBack = 0;
/*
// Technically, we should be setting mStencil[...] values to
// `allOnes`, but either ANGLE breaks or the SGX540s on Try break.
GLuint stencilBits = 0;
gl->GetUIntegerv(LOCAL_GL_STENCIL_BITS, &stencilBits);
GLuint allOnes = ~(UINT32_MAX << stencilBits);
mStencilValueMaskFront = allOnes;
mStencilValueMaskBack = allOnes;
mStencilWriteMaskFront = allOnes;
mStencilWriteMaskBack = allOnes;
*/
gl->GetUIntegerv(LOCAL_GL_STENCIL_VALUE_MASK, &mStencilValueMaskFront);
gl->GetUIntegerv(LOCAL_GL_STENCIL_BACK_VALUE_MASK, &mStencilValueMaskBack);
gl->GetUIntegerv(LOCAL_GL_STENCIL_WRITEMASK, &mStencilWriteMaskFront);
gl->GetUIntegerv(LOCAL_GL_STENCIL_BACK_WRITEMASK, &mStencilWriteMaskBack);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_VALUE_MASK, mStencilValueMaskFront);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_VALUE_MASK, mStencilValueMaskBack);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_WRITEMASK, mStencilWriteMaskFront);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_WRITEMASK, mStencilWriteMaskBack);
mDitherEnabled = true;
mRasterizerDiscardEnabled = false;
mScissorTestEnabled = false;
// Bindings, etc.
mActiveTexture = 0;
mDefaultFB_DrawBuffer0 = LOCAL_GL_BACK;
mEmitContextLostErrorOnce = true;
mWebGLError = LOCAL_GL_NO_ERROR;
mUnderlyingGLError = LOCAL_GL_NO_ERROR;
mBound2DTextures.Clear();
mBoundCubeMapTextures.Clear();
mBound3DTextures.Clear();
mBound2DArrayTextures.Clear();
mBoundSamplers.Clear();
mBoundArrayBuffer = nullptr;
mBoundTransformFeedbackBuffer = nullptr;
mCurrentProgram = nullptr;
mBoundDrawFramebuffer = nullptr;
mBoundReadFramebuffer = nullptr;
mBoundRenderbuffer = nullptr;
MakeContextCurrent();
// For OpenGL compat. profiles, we always keep vertex attrib 0 array enabled.
if (gl->IsCompatibilityProfile())
gl->fEnableVertexAttribArray(0);
if (MinCapabilityMode())
mGLMaxVertexAttribs = MINVALUE_GL_MAX_VERTEX_ATTRIBS;
else
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_ATTRIBS, &mGLMaxVertexAttribs);
if (mGLMaxVertexAttribs < 8) {
GenerateWarning("GL_MAX_VERTEX_ATTRIBS: %d is < 8!",
mGLMaxVertexAttribs);
return false;
}
// Note: GL_MAX_TEXTURE_UNITS is fixed at 4 for most desktop hardware,
// even though the hardware supports much more. The
// GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS value is the accurate value.
if (MinCapabilityMode())
mGLMaxTextureUnits = MINVALUE_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS;
else
gl->fGetIntegerv(LOCAL_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &mGLMaxTextureUnits);
if (mGLMaxTextureUnits < 8) {
GenerateWarning("GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS: %d is < 8!",
mGLMaxTextureUnits);
return false;
}
mBound2DTextures.SetLength(mGLMaxTextureUnits);
mBoundCubeMapTextures.SetLength(mGLMaxTextureUnits);
mBound3DTextures.SetLength(mGLMaxTextureUnits);
mBound2DArrayTextures.SetLength(mGLMaxTextureUnits);
mBoundSamplers.SetLength(mGLMaxTextureUnits);
////////////////
if (MinCapabilityMode()) {
mImplMaxTextureSize = MINVALUE_GL_MAX_TEXTURE_SIZE;
mImplMaxCubeMapTextureSize = MINVALUE_GL_MAX_CUBE_MAP_TEXTURE_SIZE;
mImplMaxRenderbufferSize = MINVALUE_GL_MAX_RENDERBUFFER_SIZE;
mImplMax3DTextureSize = MINVALUE_GL_MAX_3D_TEXTURE_SIZE;
mImplMaxArrayTextureLayers = MINVALUE_GL_MAX_ARRAY_TEXTURE_LAYERS;
mGLMaxTextureImageUnits = MINVALUE_GL_MAX_TEXTURE_IMAGE_UNITS;
mGLMaxVertexTextureImageUnits = MINVALUE_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS;
} else {
gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE, (GLint*)&mImplMaxTextureSize);
gl->fGetIntegerv(LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE, (GLint*)&mImplMaxCubeMapTextureSize);
gl->fGetIntegerv(LOCAL_GL_MAX_RENDERBUFFER_SIZE, (GLint*)&mImplMaxRenderbufferSize);
if (!gl->GetPotentialInteger(LOCAL_GL_MAX_3D_TEXTURE_SIZE, (GLint*)&mImplMax3DTextureSize))
mImplMax3DTextureSize = 0;
if (!gl->GetPotentialInteger(LOCAL_GL_MAX_ARRAY_TEXTURE_LAYERS, (GLint*)&mImplMaxArrayTextureLayers))
mImplMaxArrayTextureLayers = 0;
gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS, &mGLMaxTextureImageUnits);
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &mGLMaxVertexTextureImageUnits);
}
// If we don't support a target, its max size is 0. We should only floor-to-POT if the
// value if it's non-zero. (NB log2(0) is -Inf, so zero isn't an integer power-of-two)
const auto fnFloorPOTIfSupported = [](uint32_t& val) {
if (val) {
val = FloorPOT(val);
}
};
fnFloorPOTIfSupported(mImplMaxTextureSize);
fnFloorPOTIfSupported(mImplMaxCubeMapTextureSize);
fnFloorPOTIfSupported(mImplMaxRenderbufferSize);
fnFloorPOTIfSupported(mImplMax3DTextureSize);
fnFloorPOTIfSupported(mImplMaxArrayTextureLayers);
////////////////
mGLMaxColorAttachments = 1;
mGLMaxDrawBuffers = 1;
gl->GetPotentialInteger(LOCAL_GL_MAX_COLOR_ATTACHMENTS,
(GLint*)&mGLMaxColorAttachments);
gl->GetPotentialInteger(LOCAL_GL_MAX_DRAW_BUFFERS, (GLint*)&mGLMaxDrawBuffers);
if (MinCapabilityMode()) {
mGLMaxColorAttachments = std::min(mGLMaxColorAttachments,
kMinMaxColorAttachments);
mGLMaxDrawBuffers = std::min(mGLMaxDrawBuffers, kMinMaxDrawBuffers);
}
if (IsWebGL2()) {
mImplMaxColorAttachments = mGLMaxColorAttachments;
mImplMaxDrawBuffers = std::min(mGLMaxDrawBuffers, mImplMaxColorAttachments);
} else {
mImplMaxColorAttachments = 1;
mImplMaxDrawBuffers = 1;
}
////////////////
if (MinCapabilityMode()) {
mGLMaxFragmentUniformVectors = MINVALUE_GL_MAX_FRAGMENT_UNIFORM_VECTORS;
mGLMaxVertexUniformVectors = MINVALUE_GL_MAX_VERTEX_UNIFORM_VECTORS;
mGLMaxVaryingVectors = MINVALUE_GL_MAX_VARYING_VECTORS;
} else {
if (gl->IsSupported(gl::GLFeature::ES2_compatibility)) {
gl->fGetIntegerv(LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS, &mGLMaxFragmentUniformVectors);
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS, &mGLMaxVertexUniformVectors);
gl->fGetIntegerv(LOCAL_GL_MAX_VARYING_VECTORS, &mGLMaxVaryingVectors);
} else {
gl->fGetIntegerv(LOCAL_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &mGLMaxFragmentUniformVectors);
mGLMaxFragmentUniformVectors /= 4;
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_UNIFORM_COMPONENTS, &mGLMaxVertexUniformVectors);
mGLMaxVertexUniformVectors /= 4;
/* We are now going to try to read GL_MAX_VERTEX_OUTPUT_COMPONENTS
* and GL_MAX_FRAGMENT_INPUT_COMPONENTS, however these constants
* only entered the OpenGL standard at OpenGL 3.2. So we will try
* reading, and check OpenGL error for INVALID_ENUM.
*
* On the public_webgl list, "problematic GetParameter pnames"
* thread, the following formula was given:
* maxVaryingVectors = min(GL_MAX_VERTEX_OUTPUT_COMPONENTS,
* GL_MAX_FRAGMENT_INPUT_COMPONENTS) / 4
*/
GLint maxVertexOutputComponents = 0;
GLint maxFragmentInputComponents = 0;
const bool ok = (gl->GetPotentialInteger(LOCAL_GL_MAX_VERTEX_OUTPUT_COMPONENTS,
&maxVertexOutputComponents) &&
gl->GetPotentialInteger(LOCAL_GL_MAX_FRAGMENT_INPUT_COMPONENTS,
&maxFragmentInputComponents));
if (ok) {
mGLMaxVaryingVectors = std::min(maxVertexOutputComponents,
maxFragmentInputComponents) / 4;
} else {
mGLMaxVaryingVectors = 16;
// 16 = 64/4, and 64 is the min value for
// maxVertexOutputComponents in the OpenGL 3.2 spec.
}
}
}
if (gl->IsCompatibilityProfile()) {
// gl_PointSize is always available in ES2 GLSL, but has to be
// specifically enabled on desktop GLSL.
gl->fEnable(LOCAL_GL_VERTEX_PROGRAM_POINT_SIZE);
/* gl_PointCoord is always available in ES2 GLSL and in newer desktop
* GLSL versions, but apparently not in OpenGL 2 and apparently not (due
* to a driver bug) on certain NVIDIA setups. See:
* http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=261472
*
* Note that this used to cause crashes on old ATI drivers... Hopefully
* not a significant anymore. See bug 602183.
*/
gl->fEnable(LOCAL_GL_POINT_SPRITE);
}
#ifdef XP_MACOSX
if (gl->WorkAroundDriverBugs() &&
gl->Vendor() == gl::GLVendor::ATI &&
!nsCocoaFeatures::IsAtLeastVersion(10,9))
{
// The Mac ATI driver, in all known OSX version up to and including
// 10.8, renders points sprites upside-down. (Apple bug 11778921)
gl->fPointParameterf(LOCAL_GL_POINT_SPRITE_COORD_ORIGIN,
LOCAL_GL_LOWER_LEFT);
}
#endif
if (gl->IsSupported(gl::GLFeature::seamless_cube_map_opt_in)) {
gl->fEnable(LOCAL_GL_TEXTURE_CUBE_MAP_SEAMLESS);
}
// Check the shader validator pref
mBypassShaderValidation = gfxPrefs::WebGLBypassShaderValidator();
// initialize shader translator
if (!ShInitialize()) {
GenerateWarning("GLSL translator initialization failed!");
return false;
}
// Mesa can only be detected with the GL_VERSION string, of the form
// "2.1 Mesa 7.11.0"
const char* versionStr = (const char*)(gl->fGetString(LOCAL_GL_VERSION));
mIsMesa = strstr(versionStr, "Mesa");
// Notice that the point of calling fGetError here is not only to check for
// errors, but also to reset the error flags so that a subsequent WebGL
// getError call will give the correct result.
error = gl->fGetError();
if (error != LOCAL_GL_NO_ERROR) {
GenerateWarning("GL error 0x%x occurred during WebGL context"
" initialization!", error);
return false;
}
if (IsWebGL2() &&
!InitWebGL2())
{
// Todo: Bug 898404: Only allow WebGL2 on GL>=3.0 on desktop GL.
return false;
}
// Default value for all disabled vertex attributes is [0, 0, 0, 1]
mVertexAttribType = MakeUnique<GLenum[]>(mGLMaxVertexAttribs);
for (int32_t index = 0; index < mGLMaxVertexAttribs; ++index) {
mVertexAttribType[index] = LOCAL_GL_FLOAT;
VertexAttrib4f(index, 0, 0, 0, 1);
}
mDefaultVertexArray = WebGLVertexArray::Create(this);
mDefaultVertexArray->mAttribs.SetLength(mGLMaxVertexAttribs);
mBoundVertexArray = mDefaultVertexArray;
// OpenGL core profiles remove the default VAO object from version
// 4.0.0. We create a default VAO for all core profiles,
// regardless of version.
//
// GL Spec 4.0.0:
// (https://www.opengl.org/registry/doc/glspec40.core.20100311.pdf)
// in Section E.2.2 "Removed Features", pg 397: "[...] The default
// vertex array object (the name zero) is also deprecated. [...]"
if (gl->IsCoreProfile()) {
MakeContextCurrent();
mDefaultVertexArray->GenVertexArray();
mDefaultVertexArray->BindVertexArray();
}
mPixelStore_FlipY = false;
mPixelStore_PremultiplyAlpha = false;
mPixelStore_ColorspaceConversion = BROWSER_DEFAULT_WEBGL;
// GLES 3.0.4, p259:
mPixelStore_UnpackImageHeight = 0;
mPixelStore_UnpackSkipImages = 0;
mPixelStore_UnpackRowLength = 0;
mPixelStore_UnpackSkipRows = 0;
mPixelStore_UnpackSkipPixels = 0;
mPixelStore_UnpackAlignment = 4;
mPixelStore_PackRowLength = 0;
mPixelStore_PackSkipRows = 0;
mPixelStore_PackSkipPixels = 0;
mPixelStore_PackAlignment = 4;
return true;
}
bool
WebGL2Context::ValidateClearBuffer(const char* funcName, GLenum buffer, GLint drawBuffer,
size_t availElemCount, GLuint elemOffset,
GLenum funcType)
{
if (elemOffset > availElemCount) {
ErrorInvalidValue("%s: Offset too big for list.", funcName);
return false;
}
availElemCount -= elemOffset;
////
size_t requiredElements;
GLint maxDrawBuffer;
switch (buffer) {
case LOCAL_GL_COLOR:
requiredElements = 4;
maxDrawBuffer = mGLMaxDrawBuffers - 1;
break;
case LOCAL_GL_DEPTH:
case LOCAL_GL_STENCIL:
requiredElements = 1;
maxDrawBuffer = 0;
break;
case LOCAL_GL_DEPTH_STENCIL:
requiredElements = 2;
maxDrawBuffer = 0;
break;
default:
ErrorInvalidEnumInfo(funcName, buffer);
return false;
}
if (drawBuffer < 0 || drawBuffer > maxDrawBuffer) {
ErrorInvalidValue("%s: Invalid drawbuffer %d. This buffer only supports"
" `drawbuffer` values between 0 and %u.",
funcName, drawBuffer, maxDrawBuffer);
return false;
}
if (availElemCount < requiredElements) {
ErrorInvalidValue("%s: Not enough elements. Require %u. Given %u.",
funcName, requiredElements, availElemCount);
return false;
}
////
MakeContextCurrent();
const auto& fb = mBoundDrawFramebuffer;
if (fb) {
if (!fb->ValidateAndInitAttachments(funcName))
return false;
if (!fb->ValidateClearBufferType(funcName, buffer, drawBuffer, funcType))
return false;
} else if (buffer == LOCAL_GL_COLOR) {
if (drawBuffer != 0)
return true;
if (mDefaultFB_DrawBuffer0 == LOCAL_GL_NONE)
return true;
if (funcType != LOCAL_GL_FLOAT) {
ErrorInvalidOperation("%s: For default framebuffer, COLOR is always of type"
" FLOAT.",
funcName);
return false;
}
}
return true;
}
_X_EXPORT Bool
glXMakeCurrent(Display * dpy, GLXDrawable draw, GLXContext gc)
{
return MakeContextCurrent(dpy, draw, draw, gc);
}
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();
}
void
WebGL2Context::GetActiveUniforms(JSContext* cx, const WebGLProgram& program,
const dom::Sequence<GLuint>& uniformIndices,
GLenum pname, JS::MutableHandleValue retval)
{
const char funcName[] = "getActiveUniforms";
retval.setNull();
if (IsContextLost())
return;
if (!ValidateUniformEnum(this, pname, funcName))
return;
if (!ValidateObject("getActiveUniforms: program", program))
return;
const auto& numActiveUniforms = program.LinkInfo()->uniforms.size();
for (const auto& curIndex : uniformIndices) {
if (curIndex >= numActiveUniforms) {
ErrorInvalidValue("%s: Too-large active uniform index queried.", funcName);
return;
}
}
const auto& count = uniformIndices.Length();
JS::Rooted<JSObject*> array(cx, JS_NewArrayObject(cx, count));
UniquePtr<GLint[]> samples(new GLint[count]);
if (!array || !samples) {
ErrorOutOfMemory("%s: Failed to allocate buffers.", funcName);
return;
}
retval.setObject(*array);
MakeContextCurrent();
gl->fGetActiveUniformsiv(program.mGLName, count, uniformIndices.Elements(), pname,
samples.get());
switch (pname) {
case LOCAL_GL_UNIFORM_TYPE:
case LOCAL_GL_UNIFORM_SIZE:
case LOCAL_GL_UNIFORM_BLOCK_INDEX:
case LOCAL_GL_UNIFORM_OFFSET:
case LOCAL_GL_UNIFORM_ARRAY_STRIDE:
case LOCAL_GL_UNIFORM_MATRIX_STRIDE:
for (size_t i = 0; i < count; ++i) {
JS::RootedValue value(cx);
value = JS::Int32Value(samples[i]);
if (!JS_DefineElement(cx, array, i, value, JSPROP_ENUMERATE))
return;
}
break;
case LOCAL_GL_UNIFORM_IS_ROW_MAJOR:
for (size_t i = 0; i < count; ++i) {
JS::RootedValue value(cx);
value = JS::BooleanValue(samples[i]);
if (!JS_DefineElement(cx, array, i, value, JSPROP_ENUMERATE))
return;
}
break;
default:
MOZ_CRASH("Invalid pname");
}
}
