/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "CompositingRenderTargetOGL.h"
#include "GLContext.h"
#include "GLReadTexImageHelper.h"
#include "ScopedGLHelpers.h"
#include "mozilla/gfx/2D.h"
namespace mozilla {
namespace layers {
using namespace mozilla::gfx;
using namespace mozilla::gl;
CompositingRenderTargetOGL::~CompositingRenderTargetOGL() {
if (mGLResourceOwnership == GLResourceOwnership::OWNED_BY_RENDER_TARGET &&
mGL && mGL->MakeCurrent()) {
mGL->fDeleteTextures(1, &mTextureHandle);
mGL->fDeleteFramebuffers(1, &mFBO);
}
}
void CompositingRenderTargetOGL::BindTexture(GLenum aTextureUnit,
GLenum aTextureTarget) {
MOZ_ASSERT(!mNeedInitialization);
MOZ_ASSERT(mTextureHandle != 0);
mGL->fActiveTexture(aTextureUnit);
mGL->fBindTexture(aTextureTarget, mTextureHandle);
}
void CompositingRenderTargetOGL::BindRenderTarget() {
bool needsClear =
false;
if (mNeedInitialization) {
Initialize(mNeedInitialization->mFBOTextureTarget);
if (mNeedInitialization->mInitMode == INIT_MODE_CLEAR) {
needsClear =
true;
mClearOnBind =
false;
}
mNeedInitialization = Nothing();
}
else {
GLuint fbo = GetFBO();
mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
// The main framebuffer (0) of non-offscreen contexts
// might be backed by a EGLSurface that needs to be renewed.
if (mFBO == 0 && !mGL->IsOffscreen()) {
mGL->RenewSurface(mCompositor->GetWidget());
result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
}
if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
nsAutoCString msg;
msg.AppendPrintf(
"Framebuffer not complete -- CheckFramebufferStatus returned 0x%x, "
"GLContext=%p, IsOffscreen()=%d, mFBO=%d, "
"aRect.width=%d, aRect.height=%d",
result, mGL.get(), mGL->IsOffscreen(), mFBO, mSize.width,
mSize.height);
NS_WARNING(msg.get());
}
}
needsClear = mClearOnBind;
}
if (needsClear) {
ScopedGLState scopedScissorTestState(mGL, LOCAL_GL_SCISSOR_TEST,
true);
ScopedScissorRect autoScissorRect(mGL, 0, 0, mSize.width, mSize.height);
mGL->fClearColor(0.0, 0.0, 0.0, 0.0);
mGL->fClearDepth(0.0);
mGL->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
}
}
GLuint CompositingRenderTargetOGL::GetFBO()
const {
MOZ_ASSERT(!mNeedInitialization);
return mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
}
#ifdef MOZ_DUMP_PAINTING
already_AddRefed<DataSourceSurface> CompositingRenderTargetOGL::Dump(
Compositor* aCompositor) {
MOZ_ASSERT(!mNeedInitialization);
CompositorOGL* compositorOGL = aCompositor->AsCompositorOGL();
return ReadBackSurface(mGL, mTextureHandle,
true,
compositorOGL->GetFBOFormat());
}
#endif
void CompositingRenderTargetOGL::Initialize(GLenum aFBOTextureTarget) {
// TODO: call mGL->GetBackbufferFB(), use that
GLuint fbo = mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0,
aFBOTextureTarget, mTextureHandle, 0);
// Making this call to fCheckFramebufferStatus prevents a crash on
// PowerVR. See bug 695246.
GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
nsAutoCString msg;
msg.AppendPrintf(
"Framebuffer not complete -- error 0x%x, aFBOTextureTarget 0x%x, mFBO "
"%d, mTextureHandle %d, aRect.width %d, aRect.height %d",
result, aFBOTextureTarget, mFBO, mTextureHandle, mSize.width,
mSize.height);
NS_ERROR(msg.get());
}
}
}
// namespace layers
}
// namespace mozilla
