mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-11 16:32:59 +00:00
789 lines
26 KiB
C++
789 lines
26 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "WebGLContext.h"
|
|
|
|
#include "GLContext.h"
|
|
#include "mozilla/CheckedInt.h"
|
|
#include "WebGLBuffer.h"
|
|
#include "WebGLContextUtils.h"
|
|
#include "WebGLFramebuffer.h"
|
|
#include "WebGLProgram.h"
|
|
#include "WebGLRenderbuffer.h"
|
|
#include "WebGLShader.h"
|
|
#include "WebGLTexture.h"
|
|
#include "WebGLVertexArray.h"
|
|
#include "WebGLVertexAttribData.h"
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::dom;
|
|
using namespace mozilla::gl;
|
|
|
|
// For a Tegra workaround.
|
|
static const int MAX_DRAW_CALLS_SINCE_FLUSH = 100;
|
|
|
|
bool
|
|
WebGLContext::DrawInstanced_check(const char* info)
|
|
{
|
|
// This restriction was removed in GLES3, so WebGL2 shouldn't have it.
|
|
if (!IsWebGL2() &&
|
|
IsExtensionEnabled(WebGLExtensionID::ANGLE_instanced_arrays) &&
|
|
!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::DrawArrays_check(GLint first, GLsizei count, GLsizei primcount, const char* info)
|
|
{
|
|
if (first < 0 || count < 0) {
|
|
ErrorInvalidValue("%s: negative first or count", 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;
|
|
}
|
|
|
|
// Any checks below this depend on a program being available.
|
|
if (!mCurrentProgram) {
|
|
ErrorInvalidOperation("%s: null CURRENT_PROGRAM", info);
|
|
return false;
|
|
}
|
|
|
|
if (!ValidateBufferFetching(info)) {
|
|
return false;
|
|
}
|
|
|
|
CheckedInt<GLsizei> checked_firstPlusCount = CheckedInt<GLsizei>(first) + count;
|
|
|
|
if (!checked_firstPlusCount.isValid()) {
|
|
ErrorInvalidOperation("%s: overflow in first+count", info);
|
|
return false;
|
|
}
|
|
|
|
if (uint32_t(checked_firstPlusCount.value()) > mMaxFetchedVertices) {
|
|
ErrorInvalidOperation("%s: bound vertex attribute buffers do not have sufficient size for given first and count", 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;
|
|
}
|
|
|
|
MakeContextCurrent();
|
|
|
|
if (mBoundDrawFramebuffer) {
|
|
if (!mBoundDrawFramebuffer->CheckAndInitializeAttachments()) {
|
|
ErrorInvalidFramebufferOperation("%s: incomplete framebuffer", info);
|
|
return false;
|
|
}
|
|
} else {
|
|
ClearBackbufferIfNeeded();
|
|
}
|
|
|
|
if (!DoFakeVertexAttrib0(checked_firstPlusCount.value())) {
|
|
return false;
|
|
}
|
|
|
|
if (!DrawInstanced_check(info)) {
|
|
return false;
|
|
}
|
|
|
|
BindFakeBlackTextures();
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
WebGLContext::DrawArrays(GLenum mode, GLint first, GLsizei count)
|
|
{
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
if (!ValidateDrawModeEnum(mode, "drawArrays: mode"))
|
|
return;
|
|
|
|
if (!DrawArrays_check(first, count, 1, "drawArrays"))
|
|
return;
|
|
|
|
RunContextLossTimer();
|
|
|
|
{
|
|
ScopedMaskWorkaround autoMask(*this);
|
|
gl->fDrawArrays(mode, first, count);
|
|
}
|
|
|
|
Draw_cleanup();
|
|
}
|
|
|
|
void
|
|
WebGLContext::DrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount)
|
|
{
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
if (!ValidateDrawModeEnum(mode, "drawArraysInstanced: mode"))
|
|
return;
|
|
|
|
if (!DrawArrays_check(first, count, primcount, "drawArraysInstanced"))
|
|
return;
|
|
|
|
RunContextLossTimer();
|
|
|
|
{
|
|
ScopedMaskWorkaround autoMask(*this);
|
|
gl->fDrawArraysInstanced(mode, first, count, primcount);
|
|
}
|
|
|
|
Draw_cleanup();
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
CheckedUint32 checked_byteCount;
|
|
|
|
GLsizei first = 0;
|
|
|
|
if (type == LOCAL_GL_UNSIGNED_SHORT) {
|
|
checked_byteCount = 2 * CheckedUint32(count);
|
|
if (byteOffset % 2 != 0) {
|
|
ErrorInvalidOperation("%s: invalid byteOffset for UNSIGNED_SHORT (must be a multiple of 2)", info);
|
|
return false;
|
|
}
|
|
first = byteOffset / 2;
|
|
}
|
|
else if (type == LOCAL_GL_UNSIGNED_BYTE) {
|
|
checked_byteCount = count;
|
|
first = byteOffset;
|
|
}
|
|
else if (type == LOCAL_GL_UNSIGNED_INT && IsExtensionEnabled(WebGLExtensionID::OES_element_index_uint)) {
|
|
checked_byteCount = 4 * CheckedUint32(count);
|
|
if (byteOffset % 4 != 0) {
|
|
ErrorInvalidOperation("%s: invalid byteOffset for UNSIGNED_INT (must be a multiple of 4)", info);
|
|
return false;
|
|
}
|
|
first = byteOffset / 4;
|
|
}
|
|
else {
|
|
ErrorInvalidEnum("%s: type must be UNSIGNED_SHORT or UNSIGNED_BYTE", info);
|
|
return false;
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
MakeContextCurrent();
|
|
|
|
if (mBoundDrawFramebuffer) {
|
|
if (!mBoundDrawFramebuffer->CheckAndInitializeAttachments()) {
|
|
ErrorInvalidFramebufferOperation("%s: incomplete framebuffer", info);
|
|
return false;
|
|
}
|
|
} else {
|
|
ClearBackbufferIfNeeded();
|
|
}
|
|
|
|
if (!DoFakeVertexAttrib0(mMaxFetchedVertices)) {
|
|
return false;
|
|
}
|
|
|
|
if (!DrawInstanced_check(info)) {
|
|
return false;
|
|
}
|
|
|
|
BindFakeBlackTextures();
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
WebGLContext::DrawElements(GLenum mode, GLsizei count, GLenum type,
|
|
WebGLintptr byteOffset)
|
|
{
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
if (!ValidateDrawModeEnum(mode, "drawElements: mode"))
|
|
return;
|
|
|
|
GLuint upperBound = 0;
|
|
if (!DrawElements_check(count, type, byteOffset, 1, "drawElements",
|
|
&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();
|
|
}
|
|
|
|
void
|
|
WebGLContext::DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type,
|
|
WebGLintptr byteOffset, GLsizei primcount)
|
|
{
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
if (!ValidateDrawModeEnum(mode, "drawElementsInstanced: mode"))
|
|
return;
|
|
|
|
GLuint upperBound = 0;
|
|
if (!DrawElements_check(count, type, byteOffset, primcount,
|
|
"drawElementsInstanced", &upperBound))
|
|
{
|
|
return;
|
|
}
|
|
|
|
RunContextLossTimer();
|
|
|
|
{
|
|
ScopedMaskWorkaround autoMask(*this);
|
|
gl->fDrawElementsInstanced(mode, count, type,
|
|
reinterpret_cast<GLvoid*>(byteOffset),
|
|
primcount);
|
|
}
|
|
|
|
Draw_cleanup();
|
|
}
|
|
|
|
void WebGLContext::Draw_cleanup()
|
|
{
|
|
UndoFakeVertexAttrib0();
|
|
UnbindFakeBlackTextures();
|
|
|
|
if (!mBoundDrawFramebuffer) {
|
|
Invalidate();
|
|
mShouldPresent = true;
|
|
MOZ_ASSERT(!mBackbufferNeedsClear);
|
|
}
|
|
|
|
if (gl->WorkAroundDriverBugs()) {
|
|
if (gl->Renderer() == gl::GLRenderer::Tegra) {
|
|
mDrawCallsSinceLastFlush++;
|
|
|
|
if (mDrawCallsSinceLastFlush >= MAX_DRAW_CALLS_SINCE_FLUSH) {
|
|
gl->fFlush();
|
|
mDrawCallsSinceLastFlush = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Let's check the viewport
|
|
const WebGLRectangleObject* rect = CurValidDrawFBRectObject();
|
|
if (rect) {
|
|
if (mViewportWidth > rect->Width() ||
|
|
mViewportHeight > rect->Height())
|
|
{
|
|
if (!mAlreadyWarnedAboutViewportLargerThanDest) {
|
|
GenerateWarning("Drawing to a destination rect smaller than the viewport rect. "
|
|
"(This warning will only be given once)");
|
|
mAlreadyWarnedAboutViewportLargerThanDest = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Verify that state is consistent for drawing, and compute max number of elements (maxAllowedCount)
|
|
* that will be legal to be read from bound VBOs.
|
|
*/
|
|
|
|
bool
|
|
WebGLContext::ValidateBufferFetching(const char* info)
|
|
{
|
|
MOZ_ASSERT(mCurrentProgram);
|
|
// Note that mCurrentProgram->IsLinked() is NOT GUARANTEED.
|
|
MOZ_ASSERT(mActiveProgramLinkInfo);
|
|
|
|
#ifdef DEBUG
|
|
GLint currentProgram = 0;
|
|
MakeContextCurrent();
|
|
gl->fGetIntegerv(LOCAL_GL_CURRENT_PROGRAM, ¤tProgram);
|
|
MOZ_ASSERT(GLuint(currentProgram) == mCurrentProgram->mGLName,
|
|
"WebGL: current program doesn't agree with GL state");
|
|
#endif
|
|
|
|
if (mBufferFetchingIsVerified)
|
|
return true;
|
|
|
|
bool hasPerVertex = false;
|
|
uint32_t maxVertices = UINT32_MAX;
|
|
uint32_t maxInstances = UINT32_MAX;
|
|
uint32_t attribs = mBoundVertexArray->mAttribs.Length();
|
|
|
|
for (uint32_t i = 0; i < attribs; ++i) {
|
|
const WebGLVertexAttribData& vd = mBoundVertexArray->mAttribs[i];
|
|
|
|
// If the attrib array isn't enabled, there's nothing to check;
|
|
// it's a static value.
|
|
if (!vd.enabled)
|
|
continue;
|
|
|
|
if (vd.buf == nullptr) {
|
|
ErrorInvalidOperation("%s: no VBO bound to enabled vertex attrib index %d!", info, i);
|
|
return false;
|
|
}
|
|
|
|
// If the attrib is not in use, then we don't have to validate
|
|
// it, just need to make sure that the binding is non-null.
|
|
if (!mActiveProgramLinkInfo->HasActiveAttrib(i))
|
|
continue;
|
|
|
|
// the base offset
|
|
CheckedUint32 checked_byteLength = CheckedUint32(vd.buf->ByteLength()) - vd.byteOffset;
|
|
CheckedUint32 checked_sizeOfLastElement = CheckedUint32(vd.componentSize()) * vd.size;
|
|
|
|
if (!checked_byteLength.isValid() ||
|
|
!checked_sizeOfLastElement.isValid())
|
|
{
|
|
ErrorInvalidOperation("%s: integer overflow occured while checking vertex attrib %d", info, i);
|
|
return false;
|
|
}
|
|
|
|
if (checked_byteLength.value() < checked_sizeOfLastElement.value()) {
|
|
maxVertices = 0;
|
|
maxInstances = 0;
|
|
break;
|
|
}
|
|
|
|
CheckedUint32 checked_maxAllowedCount = ((checked_byteLength - checked_sizeOfLastElement) / vd.actualStride()) + 1;
|
|
|
|
if (!checked_maxAllowedCount.isValid()) {
|
|
ErrorInvalidOperation("%s: integer overflow occured while checking vertex attrib %d", info, i);
|
|
return false;
|
|
}
|
|
|
|
if (vd.divisor == 0) {
|
|
maxVertices = std::min(maxVertices, checked_maxAllowedCount.value());
|
|
hasPerVertex = true;
|
|
} else {
|
|
CheckedUint32 checked_curMaxInstances = checked_maxAllowedCount * vd.divisor;
|
|
|
|
uint32_t curMaxInstances = UINT32_MAX;
|
|
// If this isn't valid, it's because we overflowed our
|
|
// uint32 above. Just leave this as UINT32_MAX, since
|
|
// sizeof(uint32) becomes our limiting factor.
|
|
if (checked_curMaxInstances.isValid()) {
|
|
curMaxInstances = checked_curMaxInstances.value();
|
|
}
|
|
|
|
maxInstances = std::min(maxInstances, curMaxInstances);
|
|
}
|
|
}
|
|
|
|
mBufferFetchingIsVerified = true;
|
|
mBufferFetchingHasPerVertex = hasPerVertex;
|
|
mMaxFetchedVertices = maxVertices;
|
|
mMaxFetchedInstances = maxInstances;
|
|
|
|
return true;
|
|
}
|
|
|
|
WebGLVertexAttrib0Status
|
|
WebGLContext::WhatDoesVertexAttrib0Need()
|
|
{
|
|
MOZ_ASSERT(mCurrentProgram);
|
|
MOZ_ASSERT(mActiveProgramLinkInfo);
|
|
|
|
// work around Mac OSX crash, see bug 631420
|
|
#ifdef XP_MACOSX
|
|
if (gl->WorkAroundDriverBugs() &&
|
|
mBoundVertexArray->IsAttribArrayEnabled(0) &&
|
|
!mActiveProgramLinkInfo->HasActiveAttrib(0))
|
|
{
|
|
return WebGLVertexAttrib0Status::EmulatedUninitializedArray;
|
|
}
|
|
#endif
|
|
|
|
if (MOZ_LIKELY(gl->IsGLES() ||
|
|
mBoundVertexArray->IsAttribArrayEnabled(0)))
|
|
{
|
|
return WebGLVertexAttrib0Status::Default;
|
|
}
|
|
|
|
return mActiveProgramLinkInfo->HasActiveAttrib(0)
|
|
? WebGLVertexAttrib0Status::EmulatedInitializedArray
|
|
: WebGLVertexAttrib0Status::EmulatedUninitializedArray;
|
|
}
|
|
|
|
bool
|
|
WebGLContext::DoFakeVertexAttrib0(GLuint vertexCount)
|
|
{
|
|
WebGLVertexAttrib0Status whatDoesAttrib0Need = WhatDoesVertexAttrib0Need();
|
|
|
|
if (MOZ_LIKELY(whatDoesAttrib0Need == WebGLVertexAttrib0Status::Default))
|
|
return true;
|
|
|
|
if (!mAlreadyWarnedAboutFakeVertexAttrib0) {
|
|
GenerateWarning("Drawing without vertex attrib 0 array enabled forces the browser "
|
|
"to do expensive emulation work when running on desktop OpenGL "
|
|
"platforms, for example on Mac. It is preferable to always draw "
|
|
"with vertex attrib 0 array enabled, by using bindAttribLocation "
|
|
"to bind some always-used attribute to location 0.");
|
|
mAlreadyWarnedAboutFakeVertexAttrib0 = true;
|
|
}
|
|
|
|
CheckedUint32 checked_dataSize = CheckedUint32(vertexCount) * 4 * sizeof(GLfloat);
|
|
|
|
if (!checked_dataSize.isValid()) {
|
|
ErrorOutOfMemory("Integer overflow trying to construct a fake vertex attrib 0 array for a draw-operation "
|
|
"with %d vertices. Try reducing the number of vertices.", vertexCount);
|
|
return false;
|
|
}
|
|
|
|
GLuint dataSize = checked_dataSize.value();
|
|
|
|
if (!mFakeVertexAttrib0BufferObject) {
|
|
gl->fGenBuffers(1, &mFakeVertexAttrib0BufferObject);
|
|
}
|
|
|
|
// if the VBO status is already exactly what we need, or if the only difference is that it's initialized and
|
|
// we don't need it to be, then consider it OK
|
|
bool vertexAttrib0BufferStatusOK =
|
|
mFakeVertexAttrib0BufferStatus == whatDoesAttrib0Need ||
|
|
(mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray &&
|
|
whatDoesAttrib0Need == WebGLVertexAttrib0Status::EmulatedUninitializedArray);
|
|
|
|
if (!vertexAttrib0BufferStatusOK ||
|
|
mFakeVertexAttrib0BufferObjectSize < dataSize ||
|
|
mFakeVertexAttrib0BufferObjectVector[0] != mVertexAttrib0Vector[0] ||
|
|
mFakeVertexAttrib0BufferObjectVector[1] != mVertexAttrib0Vector[1] ||
|
|
mFakeVertexAttrib0BufferObjectVector[2] != mVertexAttrib0Vector[2] ||
|
|
mFakeVertexAttrib0BufferObjectVector[3] != mVertexAttrib0Vector[3])
|
|
{
|
|
mFakeVertexAttrib0BufferStatus = whatDoesAttrib0Need;
|
|
mFakeVertexAttrib0BufferObjectSize = dataSize;
|
|
mFakeVertexAttrib0BufferObjectVector[0] = mVertexAttrib0Vector[0];
|
|
mFakeVertexAttrib0BufferObjectVector[1] = mVertexAttrib0Vector[1];
|
|
mFakeVertexAttrib0BufferObjectVector[2] = mVertexAttrib0Vector[2];
|
|
mFakeVertexAttrib0BufferObjectVector[3] = mVertexAttrib0Vector[3];
|
|
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
|
|
|
|
GetAndFlushUnderlyingGLErrors();
|
|
|
|
if (mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray) {
|
|
UniquePtr<GLfloat[]> array(new ((fallible_t())) GLfloat[4 * vertexCount]);
|
|
if (!array) {
|
|
ErrorOutOfMemory("Fake attrib0 array.");
|
|
return false;
|
|
}
|
|
for(size_t i = 0; i < vertexCount; ++i) {
|
|
array[4 * i + 0] = mVertexAttrib0Vector[0];
|
|
array[4 * i + 1] = mVertexAttrib0Vector[1];
|
|
array[4 * i + 2] = mVertexAttrib0Vector[2];
|
|
array[4 * i + 3] = mVertexAttrib0Vector[3];
|
|
}
|
|
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, array.get(), LOCAL_GL_DYNAMIC_DRAW);
|
|
} else {
|
|
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, nullptr, LOCAL_GL_DYNAMIC_DRAW);
|
|
}
|
|
GLenum error = GetAndFlushUnderlyingGLErrors();
|
|
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundArrayBuffer ? mBoundArrayBuffer->GLName() : 0);
|
|
|
|
// note that we do this error checking and early return AFTER having restored the buffer binding above
|
|
if (error) {
|
|
ErrorOutOfMemory("Ran out of memory trying to construct a fake vertex attrib 0 array for a draw-operation "
|
|
"with %d vertices. Try reducing the number of vertices.", vertexCount);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
|
|
gl->fVertexAttribPointer(0, 4, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0);
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
WebGLContext::UndoFakeVertexAttrib0()
|
|
{
|
|
WebGLVertexAttrib0Status whatDoesAttrib0Need = WhatDoesVertexAttrib0Need();
|
|
|
|
if (MOZ_LIKELY(whatDoesAttrib0Need == WebGLVertexAttrib0Status::Default))
|
|
return;
|
|
|
|
if (mBoundVertexArray->HasAttrib(0) && mBoundVertexArray->mAttribs[0].buf) {
|
|
const WebGLVertexAttribData& attrib0 = mBoundVertexArray->mAttribs[0];
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, attrib0.buf->GLName());
|
|
if (attrib0.integer) {
|
|
gl->fVertexAttribIPointer(0,
|
|
attrib0.size,
|
|
attrib0.type,
|
|
attrib0.stride,
|
|
reinterpret_cast<const GLvoid*>(attrib0.byteOffset));
|
|
} else {
|
|
gl->fVertexAttribPointer(0,
|
|
attrib0.size,
|
|
attrib0.type,
|
|
attrib0.normalized,
|
|
attrib0.stride,
|
|
reinterpret_cast<const GLvoid*>(attrib0.byteOffset));
|
|
}
|
|
} else {
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundArrayBuffer ? mBoundArrayBuffer->GLName() : 0);
|
|
}
|
|
|
|
WebGLContextFakeBlackStatus
|
|
WebGLContext::ResolvedFakeBlackStatus()
|
|
{
|
|
// handle this case first, it's the generic case
|
|
if (MOZ_LIKELY(mFakeBlackStatus == WebGLContextFakeBlackStatus::NotNeeded))
|
|
return mFakeBlackStatus;
|
|
|
|
if (mFakeBlackStatus == WebGLContextFakeBlackStatus::Needed)
|
|
return mFakeBlackStatus;
|
|
|
|
for (int32_t i = 0; i < mGLMaxTextureUnits; ++i) {
|
|
if ((mBound2DTextures[i] && mBound2DTextures[i]->ResolvedFakeBlackStatus() != WebGLTextureFakeBlackStatus::NotNeeded) ||
|
|
(mBoundCubeMapTextures[i] && mBoundCubeMapTextures[i]->ResolvedFakeBlackStatus() != WebGLTextureFakeBlackStatus::NotNeeded))
|
|
{
|
|
mFakeBlackStatus = WebGLContextFakeBlackStatus::Needed;
|
|
return mFakeBlackStatus;
|
|
}
|
|
}
|
|
|
|
// we have exhausted all cases where we do need fakeblack, so if the status is still unknown,
|
|
// that means that we do NOT need it.
|
|
mFakeBlackStatus = WebGLContextFakeBlackStatus::NotNeeded;
|
|
return mFakeBlackStatus;
|
|
}
|
|
|
|
void
|
|
WebGLContext::BindFakeBlackTexturesHelper(
|
|
GLenum target,
|
|
const nsTArray<WebGLRefPtr<WebGLTexture> > & boundTexturesArray,
|
|
UniquePtr<FakeBlackTexture> & opaqueTextureScopedPtr,
|
|
UniquePtr<FakeBlackTexture> & transparentTextureScopedPtr)
|
|
{
|
|
for (int32_t i = 0; i < mGLMaxTextureUnits; ++i) {
|
|
if (!boundTexturesArray[i]) {
|
|
continue;
|
|
}
|
|
|
|
WebGLTextureFakeBlackStatus s = boundTexturesArray[i]->ResolvedFakeBlackStatus();
|
|
MOZ_ASSERT(s != WebGLTextureFakeBlackStatus::Unknown);
|
|
|
|
if (MOZ_LIKELY(s == WebGLTextureFakeBlackStatus::NotNeeded)) {
|
|
continue;
|
|
}
|
|
|
|
bool alpha = s == WebGLTextureFakeBlackStatus::UninitializedImageData &&
|
|
FormatHasAlpha(boundTexturesArray[i]->ImageInfoBase().EffectiveInternalFormat());
|
|
UniquePtr<FakeBlackTexture>&
|
|
blackTexturePtr = alpha
|
|
? transparentTextureScopedPtr
|
|
: opaqueTextureScopedPtr;
|
|
|
|
if (!blackTexturePtr) {
|
|
GLenum format = alpha ? LOCAL_GL_RGBA : LOCAL_GL_RGB;
|
|
blackTexturePtr = MakeUnique<FakeBlackTexture>(gl, target, format);
|
|
}
|
|
|
|
gl->fActiveTexture(LOCAL_GL_TEXTURE0 + i);
|
|
gl->fBindTexture(target,
|
|
blackTexturePtr->GLName());
|
|
}
|
|
}
|
|
|
|
void
|
|
WebGLContext::BindFakeBlackTextures()
|
|
{
|
|
// this is the generic case: try to return early
|
|
if (MOZ_LIKELY(ResolvedFakeBlackStatus() == WebGLContextFakeBlackStatus::NotNeeded))
|
|
return;
|
|
|
|
BindFakeBlackTexturesHelper(LOCAL_GL_TEXTURE_2D,
|
|
mBound2DTextures,
|
|
mBlackOpaqueTexture2D,
|
|
mBlackTransparentTexture2D);
|
|
BindFakeBlackTexturesHelper(LOCAL_GL_TEXTURE_CUBE_MAP,
|
|
mBoundCubeMapTextures,
|
|
mBlackOpaqueTextureCubeMap,
|
|
mBlackTransparentTextureCubeMap);
|
|
}
|
|
|
|
void
|
|
WebGLContext::UnbindFakeBlackTextures()
|
|
{
|
|
// this is the generic case: try to return early
|
|
if (MOZ_LIKELY(ResolvedFakeBlackStatus() == WebGLContextFakeBlackStatus::NotNeeded))
|
|
return;
|
|
|
|
for (int32_t i = 0; i < mGLMaxTextureUnits; ++i) {
|
|
if (mBound2DTextures[i] && mBound2DTextures[i]->ResolvedFakeBlackStatus() != WebGLTextureFakeBlackStatus::NotNeeded) {
|
|
gl->fActiveTexture(LOCAL_GL_TEXTURE0 + i);
|
|
gl->fBindTexture(LOCAL_GL_TEXTURE_2D, mBound2DTextures[i]->GLName());
|
|
}
|
|
if (mBoundCubeMapTextures[i] && mBoundCubeMapTextures[i]->ResolvedFakeBlackStatus() != WebGLTextureFakeBlackStatus::NotNeeded) {
|
|
gl->fActiveTexture(LOCAL_GL_TEXTURE0 + i);
|
|
gl->fBindTexture(LOCAL_GL_TEXTURE_CUBE_MAP, mBoundCubeMapTextures[i]->GLName());
|
|
}
|
|
}
|
|
|
|
gl->fActiveTexture(LOCAL_GL_TEXTURE0 + mActiveTexture);
|
|
}
|
|
|
|
WebGLContext::FakeBlackTexture::FakeBlackTexture(GLContext* gl, TexTarget target, GLenum format)
|
|
: mGL(gl)
|
|
, mGLName(0)
|
|
{
|
|
MOZ_ASSERT(format == LOCAL_GL_RGB || format == LOCAL_GL_RGBA);
|
|
|
|
mGL->MakeCurrent();
|
|
GLuint formerBinding = 0;
|
|
gl->GetUIntegerv(target == LOCAL_GL_TEXTURE_2D
|
|
? LOCAL_GL_TEXTURE_BINDING_2D
|
|
: LOCAL_GL_TEXTURE_BINDING_CUBE_MAP,
|
|
&formerBinding);
|
|
gl->fGenTextures(1, &mGLName);
|
|
gl->fBindTexture(target.get(), mGLName);
|
|
|
|
// we allocate our zeros on the heap, and we overallocate (16 bytes instead of 4)
|
|
// to minimize the risk of running into a driver bug in texImage2D, as it is
|
|
// a bit unusual maybe to create 1x1 textures, and the stack may not have the alignment
|
|
// that texImage2D expects.
|
|
UniquePtr<uint8_t> zeros((uint8_t*)moz_xcalloc(1, 16));
|
|
if (target == LOCAL_GL_TEXTURE_2D) {
|
|
gl->fTexImage2D(target.get(), 0, format, 1, 1,
|
|
0, format, LOCAL_GL_UNSIGNED_BYTE, zeros.get());
|
|
} else {
|
|
for (GLuint i = 0; i < 6; ++i) {
|
|
gl->fTexImage2D(LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, format, 1, 1,
|
|
0, format, LOCAL_GL_UNSIGNED_BYTE, zeros.get());
|
|
}
|
|
}
|
|
|
|
gl->fBindTexture(target.get(), formerBinding);
|
|
}
|
|
|
|
WebGLContext::FakeBlackTexture::~FakeBlackTexture()
|
|
{
|
|
if (mGL) {
|
|
mGL->MakeCurrent();
|
|
mGL->fDeleteTextures(1, &mGLName);
|
|
}
|
|
}
|