зеркало из https://github.com/mozilla/gecko-dev.git
1249 строки
38 KiB
C++
1249 строки
38 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebGLContext.h"
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#include "GLContext.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/UniquePtrExtensions.h"
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#include "nsPrintfCString.h"
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#include "WebGLBuffer.h"
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#include "WebGLContextUtils.h"
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#include "WebGLFramebuffer.h"
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#include "WebGLProgram.h"
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#include "WebGLRenderbuffer.h"
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#include "WebGLShader.h"
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#include "WebGLTexture.h"
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#include "WebGLTransformFeedback.h"
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#include "WebGLVertexArray.h"
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#include "WebGLVertexAttribData.h"
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#include <algorithm>
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namespace mozilla {
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// For a Tegra workaround.
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static const int MAX_DRAW_CALLS_SINCE_FLUSH = 100;
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////////////////////////////////////////
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class ScopedResolveTexturesForDraw
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{
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struct TexRebindRequest
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{
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uint32_t texUnit;
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WebGLTexture* tex;
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};
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WebGLContext* const mWebGL;
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std::vector<TexRebindRequest> mRebindRequests;
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public:
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ScopedResolveTexturesForDraw(WebGLContext* webgl, const char* funcName,
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bool* const out_error);
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~ScopedResolveTexturesForDraw();
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};
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bool
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WebGLTexture::IsFeedback(WebGLContext* webgl, const char* funcName, uint32_t texUnit,
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const std::vector<const WebGLFBAttachPoint*>& fbAttachments) const
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{
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auto itr = fbAttachments.cbegin();
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for (; itr != fbAttachments.cend(); ++itr) {
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const auto& attach = *itr;
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if (attach->Texture() == this)
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break;
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}
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if (itr == fbAttachments.cend())
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return false;
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////
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const auto minLevel = mBaseMipmapLevel;
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uint32_t maxLevel;
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if (!MaxEffectiveMipmapLevel(texUnit, &maxLevel)) {
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// No valid mips. Will need fake-black.
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return false;
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}
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////
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for (; itr != fbAttachments.cend(); ++itr) {
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const auto& attach = *itr;
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if (attach->Texture() != this)
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continue;
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const auto dstLevel = attach->MipLevel();
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if (minLevel <= dstLevel && dstLevel <= maxLevel) {
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webgl->ErrorInvalidOperation("%s: Feedback loop detected between tex target"
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" 0x%04x, tex unit %u, levels %u-%u; and"
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" framebuffer attachment 0x%04x, level %u.",
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funcName, mTarget.get(), texUnit, minLevel,
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maxLevel, attach->mAttachmentPoint, dstLevel);
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return true;
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}
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}
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return false;
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}
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ScopedResolveTexturesForDraw::ScopedResolveTexturesForDraw(WebGLContext* webgl,
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const char* funcName,
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bool* const out_error)
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: mWebGL(webgl)
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{
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MOZ_ASSERT(mWebGL->gl->IsCurrent());
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if (!mWebGL->mActiveProgramLinkInfo) {
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mWebGL->ErrorInvalidOperation("%s: The current program is not linked.", funcName);
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*out_error = true;
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return;
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}
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const std::vector<const WebGLFBAttachPoint*>* attachList = nullptr;
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const auto& fb = mWebGL->mBoundDrawFramebuffer;
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if (fb) {
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if (!fb->ValidateAndInitAttachments(funcName)) {
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*out_error = true;
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return;
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}
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attachList = &(fb->ResolvedCompleteData()->texDrawBuffers);
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} else {
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webgl->ClearBackbufferIfNeeded();
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}
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MOZ_ASSERT(mWebGL->mActiveProgramLinkInfo);
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const auto& uniformSamplers = mWebGL->mActiveProgramLinkInfo->uniformSamplers;
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for (const auto& uniform : uniformSamplers) {
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const auto& texList = *(uniform->mSamplerTexList);
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for (const auto& texUnit : uniform->mSamplerValues) {
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if (texUnit >= texList.Length())
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continue;
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const auto& tex = texList[texUnit];
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if (!tex)
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continue;
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if (attachList &&
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tex->IsFeedback(mWebGL, funcName, texUnit, *attachList))
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{
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*out_error = true;
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return;
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}
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FakeBlackType fakeBlack;
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if (!tex->ResolveForDraw(funcName, texUnit, &fakeBlack)) {
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mWebGL->ErrorOutOfMemory("%s: Failed to resolve textures for draw.",
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funcName);
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*out_error = true;
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return;
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}
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if (fakeBlack == FakeBlackType::None)
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continue;
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if (!mWebGL->BindFakeBlack(texUnit, tex->Target(), fakeBlack)) {
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mWebGL->ErrorOutOfMemory("%s: Failed to create fake black texture.",
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funcName);
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*out_error = true;
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return;
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}
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mRebindRequests.push_back({texUnit, tex});
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}
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}
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*out_error = false;
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}
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ScopedResolveTexturesForDraw::~ScopedResolveTexturesForDraw()
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{
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if (mRebindRequests.empty())
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return;
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gl::GLContext* gl = mWebGL->gl;
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for (const auto& itr : mRebindRequests) {
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gl->fActiveTexture(LOCAL_GL_TEXTURE0 + itr.texUnit);
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gl->fBindTexture(itr.tex->Target().get(), itr.tex->mGLName);
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}
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gl->fActiveTexture(LOCAL_GL_TEXTURE0 + mWebGL->mActiveTexture);
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}
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bool
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WebGLContext::BindFakeBlack(uint32_t texUnit, TexTarget target, FakeBlackType fakeBlack)
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{
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MOZ_ASSERT(fakeBlack == FakeBlackType::RGBA0000 ||
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fakeBlack == FakeBlackType::RGBA0001);
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const auto fnGetSlot = [this, target, fakeBlack]() -> UniquePtr<FakeBlackTexture>*
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{
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switch (fakeBlack) {
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case FakeBlackType::RGBA0000:
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switch (target.get()) {
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case LOCAL_GL_TEXTURE_2D : return &mFakeBlack_2D_0000;
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case LOCAL_GL_TEXTURE_CUBE_MAP: return &mFakeBlack_CubeMap_0000;
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case LOCAL_GL_TEXTURE_3D : return &mFakeBlack_3D_0000;
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case LOCAL_GL_TEXTURE_2D_ARRAY: return &mFakeBlack_2D_Array_0000;
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default: return nullptr;
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}
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case FakeBlackType::RGBA0001:
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switch (target.get()) {
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case LOCAL_GL_TEXTURE_2D : return &mFakeBlack_2D_0001;
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case LOCAL_GL_TEXTURE_CUBE_MAP: return &mFakeBlack_CubeMap_0001;
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case LOCAL_GL_TEXTURE_3D : return &mFakeBlack_3D_0001;
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case LOCAL_GL_TEXTURE_2D_ARRAY: return &mFakeBlack_2D_Array_0001;
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default: return nullptr;
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}
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default:
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return nullptr;
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}
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};
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UniquePtr<FakeBlackTexture>* slot = fnGetSlot();
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if (!slot) {
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MOZ_CRASH("GFX: fnGetSlot failed.");
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}
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UniquePtr<FakeBlackTexture>& fakeBlackTex = *slot;
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if (!fakeBlackTex) {
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fakeBlackTex = FakeBlackTexture::Create(gl, target, fakeBlack);
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if (!fakeBlackTex) {
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return false;
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}
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}
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gl->fActiveTexture(LOCAL_GL_TEXTURE0 + texUnit);
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gl->fBindTexture(target.get(), fakeBlackTex->mGLName);
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gl->fActiveTexture(LOCAL_GL_TEXTURE0 + mActiveTexture);
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return true;
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}
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////////////////////////////////////////
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bool
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WebGLContext::DrawInstanced_check(const char* info)
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{
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MOZ_ASSERT(IsWebGL2() ||
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IsExtensionEnabled(WebGLExtensionID::ANGLE_instanced_arrays));
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if (!mBufferFetchingHasPerVertex) {
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/* http://www.khronos.org/registry/gles/extensions/ANGLE/ANGLE_instanced_arrays.txt
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* If all of the enabled vertex attribute arrays that are bound to active
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* generic attributes in the program have a non-zero divisor, the draw
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* call should return INVALID_OPERATION.
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*
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* NB: This also appears to apply to NV_instanced_arrays, though the
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* INVALID_OPERATION emission is not explicitly stated.
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* ARB_instanced_arrays does not have this restriction.
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*/
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ErrorInvalidOperation("%s: at least one vertex attribute divisor should be 0", info);
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return false;
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}
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return true;
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}
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bool
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WebGLContext::DrawArrays_check(const char* funcName, GLenum mode, GLint first,
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GLsizei vertCount, GLsizei instanceCount)
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{
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if (!ValidateDrawModeEnum(mode, funcName))
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return false;
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if (!ValidateNonNegative(funcName, "first", first) ||
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!ValidateNonNegative(funcName, "vertCount", vertCount) ||
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!ValidateNonNegative(funcName, "instanceCount", instanceCount))
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{
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return false;
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}
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if (!ValidateStencilParamsForDrawCall())
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return false;
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if (IsWebGL2() && !gl->IsSupported(gl::GLFeature::prim_restart_fixed)) {
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MOZ_ASSERT(gl->IsSupported(gl::GLFeature::prim_restart));
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if (mPrimRestartTypeBytes != 0) {
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mPrimRestartTypeBytes = 0;
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// OSX appears to have severe perf issues with leaving this enabled.
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gl->fDisable(LOCAL_GL_PRIMITIVE_RESTART);
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}
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}
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if (!vertCount || !instanceCount)
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return false; // No error, just early out.
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if (!ValidateBufferFetching(funcName))
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return false;
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const auto checked_firstPlusCount = CheckedInt<GLsizei>(first) + vertCount;
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if (!checked_firstPlusCount.isValid()) {
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ErrorInvalidOperation("%s: overflow in first+vertCount", funcName);
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return false;
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}
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if (uint32_t(checked_firstPlusCount.value()) > mMaxFetchedVertices) {
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ErrorInvalidOperation("%s: Bound vertex attribute buffers do not have sufficient"
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" size for given first and count.",
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funcName);
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return false;
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}
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return true;
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}
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////////////////////////////////////////
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template<typename T>
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static bool
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DoSetsIntersect(const std::set<T>& a, const std::set<T>& b)
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{
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std::vector<T> intersection;
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std::set_intersection(a.begin(), a.end(), b.begin(), b.end(),
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std::back_inserter(intersection));
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return bool(intersection.size());
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}
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class ScopedDrawHelper final
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{
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WebGLContext* const mWebGL;
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bool mDidFake;
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public:
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ScopedDrawHelper(WebGLContext* webgl, const char* funcName, uint32_t firstVertex,
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uint32_t vertCount, uint32_t instanceCount, bool* const out_error)
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: mWebGL(webgl)
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, mDidFake(false)
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{
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if (instanceCount > mWebGL->mMaxFetchedInstances) {
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mWebGL->ErrorInvalidOperation("%s: Bound instance attribute buffers do not"
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" have sufficient size for given"
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" `instanceCount`.",
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funcName);
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*out_error = true;
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return;
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}
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MOZ_ASSERT(mWebGL->gl->IsCurrent());
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if (mWebGL->mBoundDrawFramebuffer) {
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if (!mWebGL->mBoundDrawFramebuffer->ValidateAndInitAttachments(funcName)) {
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*out_error = true;
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return;
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}
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} else {
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mWebGL->ClearBackbufferIfNeeded();
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}
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////
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const size_t requiredVerts = firstVertex + vertCount;
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if (!mWebGL->DoFakeVertexAttrib0(funcName, requiredVerts)) {
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*out_error = true;
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return;
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}
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mDidFake = true;
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////
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// Check UBO sizes.
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const auto& linkInfo = mWebGL->mActiveProgramLinkInfo;
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for (const auto& cur : linkInfo->uniformBlocks) {
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const auto& dataSize = cur->mDataSize;
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const auto& binding = cur->mBinding;
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if (!binding) {
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mWebGL->ErrorInvalidOperation("%s: Buffer for uniform block is null.",
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funcName);
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*out_error = true;
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return;
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}
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const auto availByteCount = binding->ByteCount();
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if (dataSize > availByteCount) {
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mWebGL->ErrorInvalidOperation("%s: Buffer for uniform block is smaller"
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" than UNIFORM_BLOCK_DATA_SIZE.",
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funcName);
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*out_error = true;
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return;
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}
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if (binding->mBufferBinding->IsBoundForTF()) {
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mWebGL->ErrorInvalidOperation("%s: Buffer for uniform block is bound or"
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" in use for transform feedback.",
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funcName);
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*out_error = true;
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return;
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}
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}
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////
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const auto& tfo = mWebGL->mBoundTransformFeedback;
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if (tfo && tfo->IsActiveAndNotPaused()) {
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uint32_t numUsed;
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switch (linkInfo->transformFeedbackBufferMode) {
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case LOCAL_GL_INTERLEAVED_ATTRIBS:
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numUsed = 1;
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break;
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case LOCAL_GL_SEPARATE_ATTRIBS:
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numUsed = linkInfo->transformFeedbackVaryings.size();
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break;
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default:
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MOZ_CRASH();
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}
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for (uint32_t i = 0; i < numUsed; ++i) {
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const auto& buffer = tfo->mIndexedBindings[i].mBufferBinding;
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if (buffer->IsBoundForNonTF()) {
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mWebGL->ErrorInvalidOperation("%s: Transform feedback varying %u's"
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" buffer is bound for"
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" non-transform-feedback.",
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funcName, i);
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*out_error = true;
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return;
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}
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}
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}
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////
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for (const auto& progAttrib : linkInfo->attribs) {
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const auto& loc = progAttrib.mLoc;
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if (loc == -1)
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continue;
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const auto& attribData = mWebGL->mBoundVertexArray->mAttribs[loc];
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GLenum attribDataBaseType;
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if (attribData.mEnabled) {
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attribDataBaseType = attribData.BaseType();
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if (attribData.mBuf->IsBoundForTF()) {
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mWebGL->ErrorInvalidOperation("%s: Vertex attrib %u's buffer is bound"
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" or in use for transform feedback.",
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funcName, loc);
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*out_error = true;
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return;
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}
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} else {
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attribDataBaseType = mWebGL->mGenericVertexAttribTypes[loc];
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}
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if (attribDataBaseType != progAttrib.mBaseType) {
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nsCString progType, dataType;
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WebGLContext::EnumName(progAttrib.mBaseType, &progType);
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WebGLContext::EnumName(attribDataBaseType, &dataType);
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mWebGL->ErrorInvalidOperation("%s: Vertex attrib %u requires data of type"
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" %s, but is being supplied with type %s.",
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funcName, loc, progType.BeginReading(),
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dataType.BeginReading());
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*out_error = true;
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return;
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}
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}
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////
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mWebGL->RunContextLossTimer();
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}
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~ScopedDrawHelper() {
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if (mDidFake) {
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mWebGL->UndoFakeVertexAttrib0();
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}
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}
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};
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////////////////////////////////////////
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static uint32_t
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UsedVertsForTFDraw(GLenum mode, uint32_t vertCount)
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{
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uint8_t vertsPerPrim;
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switch (mode) {
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case LOCAL_GL_POINTS:
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vertsPerPrim = 1;
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break;
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case LOCAL_GL_LINES:
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vertsPerPrim = 2;
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break;
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case LOCAL_GL_TRIANGLES:
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vertsPerPrim = 3;
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break;
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default:
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MOZ_CRASH("`mode`");
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}
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return vertCount / vertsPerPrim * vertsPerPrim;
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}
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class ScopedDrawWithTransformFeedback final
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{
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WebGLContext* const mWebGL;
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WebGLTransformFeedback* const mTFO;
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const bool mWithTF;
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uint32_t mUsedVerts;
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public:
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ScopedDrawWithTransformFeedback(WebGLContext* webgl, const char* funcName,
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GLenum mode, uint32_t vertCount,
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uint32_t instanceCount, bool* const out_error)
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: mWebGL(webgl)
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, mTFO(mWebGL->mBoundTransformFeedback)
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, mWithTF(mTFO &&
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mTFO->mIsActive &&
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!mTFO->mIsPaused)
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, mUsedVerts(0)
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{
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*out_error = false;
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if (!mWithTF)
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return;
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if (mode != mTFO->mActive_PrimMode) {
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mWebGL->ErrorInvalidOperation("%s: Drawing with transform feedback requires"
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" `mode` to match BeginTransformFeedback's"
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" `primitiveMode`.",
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funcName);
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*out_error = true;
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return;
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}
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const auto usedVertsPerInstance = UsedVertsForTFDraw(mode, vertCount);
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const auto usedVerts = CheckedInt<uint32_t>(usedVertsPerInstance) * instanceCount;
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const auto remainingCapacity = mTFO->mActive_VertCapacity - mTFO->mActive_VertPosition;
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if (!usedVerts.isValid() ||
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usedVerts.value() > remainingCapacity)
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{
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mWebGL->ErrorInvalidOperation("%s: Insufficient buffer capacity remaining for"
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" transform feedback.",
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funcName);
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*out_error = true;
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return;
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}
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mUsedVerts = usedVerts.value();
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}
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void Advance() const {
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if (!mWithTF)
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|
return;
|
|
|
|
mTFO->mActive_VertPosition += mUsedVerts;
|
|
}
|
|
};
|
|
|
|
////////////////////////////////////////
|
|
|
|
void
|
|
WebGLContext::DrawArrays(GLenum mode, GLint first, GLsizei vertCount)
|
|
{
|
|
const char funcName[] = "drawArrays";
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
MakeContextCurrent();
|
|
|
|
bool error = false;
|
|
ScopedResolveTexturesForDraw scopedResolve(this, funcName, &error);
|
|
if (error)
|
|
return;
|
|
|
|
const GLsizei instanceCount = 1;
|
|
if (!DrawArrays_check(funcName, mode, first, vertCount, instanceCount))
|
|
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->fDrawArrays(mode, first, vertCount);
|
|
}
|
|
|
|
Draw_cleanup(funcName);
|
|
scopedTF.Advance();
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
////////////////////////////////////////
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
////
|
|
|
|
const GLsizei first = byteOffset / bytesPerElem;
|
|
const CheckedUint32 checked_byteCount = bytesPerElem * CheckedUint32(vertCount);
|
|
|
|
if (!checked_byteCount.isValid()) {
|
|
ErrorInvalidValue("%s: Overflow in byteCount.", funcName);
|
|
return false;
|
|
}
|
|
|
|
if (!mBoundVertexArray->mElementArrayBuffer) {
|
|
ErrorInvalidOperation("%s: Must have element array buffer binding.", funcName);
|
|
return false;
|
|
}
|
|
|
|
WebGLBuffer& elemArrayBuffer = *mBoundVertexArray->mElementArrayBuffer;
|
|
|
|
if (!elemArrayBuffer.ByteLength()) {
|
|
ErrorInvalidOperation("%s: Bound element array buffer doesn't have any data.",
|
|
funcName);
|
|
return false;
|
|
}
|
|
|
|
CheckedInt<GLsizei> checked_neededByteCount = checked_byteCount.toChecked<GLsizei>() + byteOffset;
|
|
|
|
if (!checked_neededByteCount.isValid()) {
|
|
ErrorInvalidOperation("%s: Overflow in byteOffset+byteCount.", funcName);
|
|
return false;
|
|
}
|
|
|
|
if (uint32_t(checked_neededByteCount.value()) > elemArrayBuffer.ByteLength()) {
|
|
ErrorInvalidOperation("%s: Bound element array buffer is too small for given"
|
|
" count and offset.",
|
|
funcName);
|
|
return false;
|
|
}
|
|
|
|
if (!ValidateBufferFetching(funcName))
|
|
return false;
|
|
|
|
if (!mMaxFetchedVertices ||
|
|
!elemArrayBuffer.ValidateIndexedFetch(type, mMaxFetchedVertices, first, vertCount))
|
|
{
|
|
ErrorInvalidOperation("%s: bound vertex attribute buffers do not have sufficient "
|
|
"size for given indices from the bound element array",
|
|
funcName);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
HandleDrawElementsErrors(WebGLContext* webgl, const char* funcName,
|
|
gl::GLContext::LocalErrorScope& errorScope)
|
|
{
|
|
const auto err = errorScope.GetError();
|
|
if (err == LOCAL_GL_INVALID_OPERATION) {
|
|
webgl->ErrorInvalidOperation("%s: Driver rejected indexed draw call, possibly"
|
|
" due to out-of-bounds indices.", funcName);
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(!err);
|
|
if (err) {
|
|
webgl->ErrorImplementationBug("%s: Unexpected driver error during indexed draw"
|
|
" call. Please file a bug.",
|
|
funcName);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void
|
|
WebGLContext::DrawElements(GLenum mode, GLsizei vertCount, GLenum type,
|
|
WebGLintptr byteOffset, const char* funcName)
|
|
{
|
|
if (!funcName) {
|
|
funcName = "drawElements";
|
|
}
|
|
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
MakeContextCurrent();
|
|
|
|
bool error = false;
|
|
ScopedResolveTexturesForDraw scopedResolve(this, funcName, &error);
|
|
if (error)
|
|
return;
|
|
|
|
const GLsizei instanceCount = 1;
|
|
if (!DrawElements_check(funcName, mode, vertCount, type, byteOffset, instanceCount))
|
|
return;
|
|
|
|
const ScopedDrawHelper scopedHelper(this, funcName, 0, mMaxFetchedVertices, instanceCount,
|
|
&error);
|
|
if (error)
|
|
return;
|
|
|
|
{
|
|
ScopedDrawCallWrapper wrapper(*this);
|
|
{
|
|
UniquePtr<gl::GLContext::LocalErrorScope> errorScope;
|
|
|
|
if (gl->IsANGLE()) {
|
|
errorScope.reset(new gl::GLContext::LocalErrorScope(*gl));
|
|
}
|
|
|
|
gl->fDrawElements(mode, vertCount, type,
|
|
reinterpret_cast<GLvoid*>(byteOffset));
|
|
|
|
if (errorScope) {
|
|
HandleDrawElementsErrors(this, funcName, *errorScope);
|
|
}
|
|
}
|
|
}
|
|
|
|
Draw_cleanup(funcName);
|
|
}
|
|
|
|
void
|
|
WebGLContext::DrawElementsInstanced(GLenum mode, GLsizei vertCount, GLenum type,
|
|
WebGLintptr byteOffset, GLsizei instanceCount)
|
|
{
|
|
const char funcName[] = "drawElementsInstanced";
|
|
if (IsContextLost())
|
|
return;
|
|
|
|
MakeContextCurrent();
|
|
|
|
bool error = false;
|
|
ScopedResolveTexturesForDraw scopedResolve(this, funcName, &error);
|
|
if (error)
|
|
return;
|
|
|
|
if (!DrawElements_check(funcName, mode, vertCount, type, byteOffset, instanceCount))
|
|
return;
|
|
|
|
if (!DrawInstanced_check(funcName))
|
|
return;
|
|
|
|
const ScopedDrawHelper scopedHelper(this, funcName, 0, mMaxFetchedVertices, instanceCount,
|
|
&error);
|
|
if (error)
|
|
return;
|
|
|
|
{
|
|
ScopedDrawCallWrapper wrapper(*this);
|
|
{
|
|
UniquePtr<gl::GLContext::LocalErrorScope> errorScope;
|
|
|
|
if (gl->IsANGLE()) {
|
|
errorScope.reset(new gl::GLContext::LocalErrorScope(*gl));
|
|
}
|
|
|
|
gl->fDrawElementsInstanced(mode, vertCount, type,
|
|
reinterpret_cast<GLvoid*>(byteOffset),
|
|
instanceCount);
|
|
if (errorScope) {
|
|
HandleDrawElementsErrors(this, funcName, *errorScope);
|
|
}
|
|
}
|
|
}
|
|
|
|
Draw_cleanup(funcName);
|
|
}
|
|
|
|
////////////////////////////////////////
|
|
|
|
void
|
|
WebGLContext::Draw_cleanup(const char* funcName)
|
|
{
|
|
if (gl->WorkAroundDriverBugs()) {
|
|
if (gl->Renderer() == gl::GLRenderer::Tegra) {
|
|
mDrawCallsSinceLastFlush++;
|
|
|
|
if (mDrawCallsSinceLastFlush >= MAX_DRAW_CALLS_SINCE_FLUSH) {
|
|
gl->fFlush();
|
|
mDrawCallsSinceLastFlush = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Let's check for a really common error: Viewport is larger than the actual
|
|
// destination framebuffer.
|
|
uint32_t destWidth = mViewportWidth;
|
|
uint32_t destHeight = mViewportHeight;
|
|
|
|
if (mBoundDrawFramebuffer) {
|
|
const auto& drawBuffers = mBoundDrawFramebuffer->ColorDrawBuffers();
|
|
for (const auto& cur : drawBuffers) {
|
|
if (!cur->IsDefined())
|
|
continue;
|
|
cur->Size(&destWidth, &destHeight);
|
|
break;
|
|
}
|
|
} else {
|
|
destWidth = mWidth;
|
|
destHeight = mHeight;
|
|
}
|
|
|
|
if (mViewportWidth > int32_t(destWidth) ||
|
|
mViewportHeight > int32_t(destHeight))
|
|
{
|
|
if (!mAlreadyWarnedAboutViewportLargerThanDest) {
|
|
GenerateWarning("%s: Drawing to a destination rect smaller than the viewport"
|
|
" rect. (This warning will only be given once)",
|
|
funcName);
|
|
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;
|
|
const uint32_t attribCount = mBoundVertexArray->mAttribs.Length();
|
|
|
|
uint32_t i = 0;
|
|
for (const auto& vd : mBoundVertexArray->mAttribs) {
|
|
// If the attrib array isn't enabled, there's nothing to check;
|
|
// it's a static value.
|
|
if (!vd.mEnabled)
|
|
continue;
|
|
|
|
if (!vd.mBuf) {
|
|
ErrorInvalidOperation("%s: no VBO bound to enabled vertex attrib index %du!",
|
|
info, i);
|
|
return false;
|
|
}
|
|
|
|
++i;
|
|
}
|
|
|
|
mBufferFetch_IsAttrib0Active = false;
|
|
|
|
for (const auto& attrib : mActiveProgramLinkInfo->attribs) {
|
|
if (attrib.mLoc == -1)
|
|
continue;
|
|
|
|
const uint32_t attribLoc(attrib.mLoc);
|
|
if (attribLoc >= attribCount)
|
|
continue;
|
|
|
|
if (attribLoc == 0) {
|
|
mBufferFetch_IsAttrib0Active = true;
|
|
}
|
|
|
|
const auto& vd = mBoundVertexArray->mAttribs[attribLoc];
|
|
if (!vd.mEnabled)
|
|
continue;
|
|
|
|
const auto& bufByteLen = vd.mBuf->ByteLength();
|
|
if (vd.ByteOffset() > bufByteLen) {
|
|
maxVertices = 0;
|
|
maxInstances = 0;
|
|
break;
|
|
}
|
|
|
|
size_t availBytes = bufByteLen - vd.ByteOffset();
|
|
if (vd.BytesPerVertex() > availBytes) {
|
|
maxVertices = 0;
|
|
maxInstances = 0;
|
|
break;
|
|
}
|
|
availBytes -= vd.BytesPerVertex(); // Snip off the tail.
|
|
const size_t vertCapacity = availBytes / vd.ExplicitStride() + 1; // Add +1 for the snipped tail.
|
|
|
|
if (vd.mDivisor == 0) {
|
|
if (vertCapacity < maxVertices) {
|
|
maxVertices = vertCapacity;
|
|
}
|
|
hasPerVertex = true;
|
|
} else {
|
|
const auto curMaxInstances = CheckedInt<size_t>(vertCapacity) * vd.mDivisor;
|
|
// If this isn't valid, it's because we overflowed, which means we can support
|
|
// *too much*. Don't update maxInstances in this case.
|
|
if (curMaxInstances.isValid() &&
|
|
curMaxInstances.value() < maxInstances)
|
|
{
|
|
maxInstances = curMaxInstances.value();
|
|
}
|
|
}
|
|
}
|
|
|
|
mBufferFetchingIsVerified = true;
|
|
mBufferFetchingHasPerVertex = hasPerVertex;
|
|
mMaxFetchedVertices = maxVertices;
|
|
mMaxFetchedInstances = maxInstances;
|
|
|
|
return true;
|
|
}
|
|
|
|
WebGLVertexAttrib0Status
|
|
WebGLContext::WhatDoesVertexAttrib0Need() const
|
|
{
|
|
MOZ_ASSERT(mCurrentProgram);
|
|
MOZ_ASSERT(mActiveProgramLinkInfo);
|
|
|
|
const auto& isAttribArray0Enabled = mBoundVertexArray->mAttribs[0].mEnabled;
|
|
|
|
bool legacyAttrib0 = gl->IsCompatibilityProfile();
|
|
#ifdef XP_MACOSX
|
|
if (gl->WorkAroundDriverBugs()) {
|
|
// Failures in conformance/attribs/gl-disabled-vertex-attrib.
|
|
// Even in Core profiles on NV. Sigh.
|
|
legacyAttrib0 |= (gl->Vendor() == gl::GLVendor::NVIDIA);
|
|
}
|
|
#endif
|
|
|
|
if (!legacyAttrib0)
|
|
return WebGLVertexAttrib0Status::Default;
|
|
|
|
if (isAttribArray0Enabled && mBufferFetch_IsAttrib0Active)
|
|
return WebGLVertexAttrib0Status::Default;
|
|
|
|
if (mBufferFetch_IsAttrib0Active)
|
|
return WebGLVertexAttrib0Status::EmulatedInitializedArray;
|
|
|
|
// Ensure that the legacy code has enough buffer.
|
|
return WebGLVertexAttrib0Status::EmulatedUninitializedArray;
|
|
}
|
|
|
|
bool
|
|
WebGLContext::DoFakeVertexAttrib0(const char* funcName, GLuint vertexCount)
|
|
{
|
|
if (!vertexCount) {
|
|
vertexCount = 1;
|
|
}
|
|
|
|
const auto 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;
|
|
}
|
|
|
|
gl->fEnableVertexAttribArray(0);
|
|
|
|
if (!mFakeVertexAttrib0BufferObject) {
|
|
gl->fGenBuffers(1, &mFakeVertexAttrib0BufferObject);
|
|
mFakeVertexAttrib0BufferObjectSize = 0;
|
|
}
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
|
|
|
|
////
|
|
|
|
switch (mGenericVertexAttribTypes[0]) {
|
|
case LOCAL_GL_FLOAT:
|
|
gl->fVertexAttribPointer(0, 4, LOCAL_GL_FLOAT, false, 0, 0);
|
|
break;
|
|
|
|
case LOCAL_GL_INT:
|
|
gl->fVertexAttribIPointer(0, 4, LOCAL_GL_INT, 0, 0);
|
|
break;
|
|
|
|
case LOCAL_GL_UNSIGNED_INT:
|
|
gl->fVertexAttribIPointer(0, 4, LOCAL_GL_UNSIGNED_INT, 0, 0);
|
|
break;
|
|
|
|
default:
|
|
MOZ_CRASH();
|
|
}
|
|
|
|
////
|
|
|
|
const auto bytesPerVert = sizeof(mFakeVertexAttrib0Data);
|
|
const auto checked_dataSize = CheckedUint32(vertexCount) * bytesPerVert;
|
|
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;
|
|
}
|
|
const auto dataSize = checked_dataSize.value();
|
|
|
|
if (mFakeVertexAttrib0BufferObjectSize < dataSize) {
|
|
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, nullptr, LOCAL_GL_DYNAMIC_DRAW);
|
|
mFakeVertexAttrib0BufferObjectSize = dataSize;
|
|
mFakeVertexAttrib0DataDefined = false;
|
|
}
|
|
|
|
if (whatDoesAttrib0Need == WebGLVertexAttrib0Status::EmulatedUninitializedArray)
|
|
return true;
|
|
|
|
////
|
|
|
|
if (mFakeVertexAttrib0DataDefined &&
|
|
memcmp(mFakeVertexAttrib0Data, mGenericVertexAttrib0Data, bytesPerVert) == 0)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
////
|
|
|
|
const UniqueBuffer data(malloc(dataSize));
|
|
if (!data) {
|
|
ErrorOutOfMemory("%s: Failed to allocate fake vertex attrib 0 array.",
|
|
funcName);
|
|
return false;
|
|
}
|
|
auto itr = (uint8_t*)data.get();
|
|
const auto itrEnd = itr + dataSize;
|
|
while (itr != itrEnd) {
|
|
memcpy(itr, mGenericVertexAttrib0Data, bytesPerVert);
|
|
itr += bytesPerVert;
|
|
}
|
|
|
|
{
|
|
gl::GLContext::LocalErrorScope errorScope(*gl);
|
|
|
|
gl->fBufferSubData(LOCAL_GL_ARRAY_BUFFER, 0, dataSize, data.get());
|
|
|
|
const auto err = errorScope.GetError();
|
|
if (err) {
|
|
ErrorOutOfMemory("%s: Failed to upload fake vertex attrib 0 data.", funcName);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
////
|
|
|
|
memcpy(mFakeVertexAttrib0Data, mGenericVertexAttrib0Data, bytesPerVert);
|
|
mFakeVertexAttrib0DataDefined = true;
|
|
return true;
|
|
}
|
|
|
|
void
|
|
WebGLContext::UndoFakeVertexAttrib0()
|
|
{
|
|
const auto whatDoesAttrib0Need = WhatDoesVertexAttrib0Need();
|
|
if (MOZ_LIKELY(whatDoesAttrib0Need == WebGLVertexAttrib0Status::Default))
|
|
return;
|
|
|
|
if (mBoundVertexArray->mAttribs[0].mBuf) {
|
|
const WebGLVertexAttribData& attrib0 = mBoundVertexArray->mAttribs[0];
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, attrib0.mBuf->mGLName);
|
|
attrib0.DoVertexAttribPointer(gl, 0);
|
|
} else {
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0);
|
|
}
|
|
|
|
static GLuint
|
|
CreateGLTexture(gl::GLContext* gl)
|
|
{
|
|
MOZ_ASSERT(gl->IsCurrent());
|
|
GLuint ret = 0;
|
|
gl->fGenTextures(1, &ret);
|
|
return ret;
|
|
}
|
|
|
|
UniquePtr<WebGLContext::FakeBlackTexture>
|
|
WebGLContext::FakeBlackTexture::Create(gl::GLContext* gl, TexTarget target,
|
|
FakeBlackType type)
|
|
{
|
|
GLenum texFormat;
|
|
switch (type) {
|
|
case FakeBlackType::RGBA0000:
|
|
texFormat = LOCAL_GL_RGBA;
|
|
break;
|
|
|
|
case FakeBlackType::RGBA0001:
|
|
texFormat = LOCAL_GL_RGB;
|
|
break;
|
|
|
|
default:
|
|
MOZ_CRASH("GFX: bad type");
|
|
}
|
|
|
|
UniquePtr<FakeBlackTexture> result(new FakeBlackTexture(gl));
|
|
gl::ScopedBindTexture scopedBind(gl, result->mGLName, target.get());
|
|
|
|
gl->fTexParameteri(target.get(), LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST);
|
|
gl->fTexParameteri(target.get(), LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_NEAREST);
|
|
|
|
// 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.
|
|
|
|
const webgl::DriverUnpackInfo dui = {texFormat, texFormat, LOCAL_GL_UNSIGNED_BYTE};
|
|
UniqueBuffer zeros = moz_xcalloc(1, 16); // Infallible allocation.
|
|
|
|
MOZ_ASSERT(gl->IsCurrent());
|
|
|
|
if (target == LOCAL_GL_TEXTURE_CUBE_MAP) {
|
|
for (int i = 0; i < 6; ++i) {
|
|
const TexImageTarget curTarget = LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X + i;
|
|
const GLenum error = DoTexImage(gl, curTarget.get(), 0, &dui, 1, 1, 1,
|
|
zeros.get());
|
|
if (error) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
} else {
|
|
const GLenum error = DoTexImage(gl, target.get(), 0, &dui, 1, 1, 1,
|
|
zeros.get());
|
|
if (error) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
WebGLContext::FakeBlackTexture::FakeBlackTexture(gl::GLContext* gl)
|
|
: mGL(gl)
|
|
, mGLName(CreateGLTexture(gl))
|
|
{
|
|
}
|
|
|
|
WebGLContext::FakeBlackTexture::~FakeBlackTexture()
|
|
{
|
|
mGL->MakeCurrent();
|
|
mGL->fDeleteTextures(1, &mGLName);
|
|
}
|
|
|
|
} // namespace mozilla
|