1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "CompositingRenderTargetOGL.h"
8 #include "GLContext.h"
9 #include "GLReadTexImageHelper.h"
10 #include "ScopedGLHelpers.h"
11 #include "mozilla/gfx/2D.h"
12
13 namespace mozilla {
14 namespace layers {
15
16 using namespace mozilla::gfx;
17 using namespace mozilla::gl;
18
~CompositingRenderTargetOGL()19 CompositingRenderTargetOGL::~CompositingRenderTargetOGL() {
20 if (mGLResourceOwnership == GLResourceOwnership::OWNED_BY_RENDER_TARGET &&
21 mGL && mGL->MakeCurrent()) {
22 mGL->fDeleteTextures(1, &mTextureHandle);
23 mGL->fDeleteFramebuffers(1, &mFBO);
24 }
25 }
26
BindTexture(GLenum aTextureUnit,GLenum aTextureTarget)27 void CompositingRenderTargetOGL::BindTexture(GLenum aTextureUnit,
28 GLenum aTextureTarget) {
29 MOZ_ASSERT(!mNeedInitialization);
30 MOZ_ASSERT(mTextureHandle != 0);
31 mGL->fActiveTexture(aTextureUnit);
32 mGL->fBindTexture(aTextureTarget, mTextureHandle);
33 }
34
BindRenderTarget()35 void CompositingRenderTargetOGL::BindRenderTarget() {
36 bool needsClear = false;
37
38 if (mNeedInitialization) {
39 Initialize(mNeedInitialization->mFBOTextureTarget);
40 if (mNeedInitialization->mInitMode == INIT_MODE_CLEAR) {
41 needsClear = true;
42 mClearOnBind = false;
43 }
44 mNeedInitialization = Nothing();
45 } else {
46 GLuint fbo = GetFBO();
47 mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
48 GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
49 if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
50 // The main framebuffer (0) of non-offscreen contexts
51 // might be backed by a EGLSurface that needs to be renewed.
52 if (mFBO == 0 && !mGL->IsOffscreen()) {
53 mGL->RenewSurface(mCompositor->GetWidget());
54 result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
55 }
56 if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
57 nsAutoCString msg;
58 msg.AppendPrintf(
59 "Framebuffer not complete -- CheckFramebufferStatus returned 0x%x, "
60 "GLContext=%p, IsOffscreen()=%d, mFBO=%d, "
61 "aRect.width=%d, aRect.height=%d",
62 result, mGL.get(), mGL->IsOffscreen(), mFBO, mSize.width,
63 mSize.height);
64 NS_WARNING(msg.get());
65 }
66 }
67
68 needsClear = mClearOnBind;
69 }
70
71 if (needsClear) {
72 ScopedGLState scopedScissorTestState(mGL, LOCAL_GL_SCISSOR_TEST, true);
73 ScopedScissorRect autoScissorRect(mGL, 0, 0, mSize.width, mSize.height);
74 mGL->fClearColor(0.0, 0.0, 0.0, 0.0);
75 mGL->fClearDepth(0.0);
76 mGL->fClear(LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT);
77 }
78 }
79
GetFBO() const80 GLuint CompositingRenderTargetOGL::GetFBO() const {
81 MOZ_ASSERT(!mNeedInitialization);
82 return mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
83 }
84
85 #ifdef MOZ_DUMP_PAINTING
Dump(Compositor * aCompositor)86 already_AddRefed<DataSourceSurface> CompositingRenderTargetOGL::Dump(
87 Compositor* aCompositor) {
88 MOZ_ASSERT(!mNeedInitialization);
89 CompositorOGL* compositorOGL = aCompositor->AsCompositorOGL();
90 return ReadBackSurface(mGL, mTextureHandle, true,
91 compositorOGL->GetFBOFormat());
92 }
93 #endif
94
Initialize(GLenum aFBOTextureTarget)95 void CompositingRenderTargetOGL::Initialize(GLenum aFBOTextureTarget) {
96 // TODO: call mGL->GetBackbufferFB(), use that
97 GLuint fbo = mFBO == 0 ? mGL->GetDefaultFramebuffer() : mFBO;
98 mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fbo);
99 mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0,
100 aFBOTextureTarget, mTextureHandle, 0);
101
102 // Making this call to fCheckFramebufferStatus prevents a crash on
103 // PowerVR. See bug 695246.
104 GLenum result = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
105 if (result != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
106 nsAutoCString msg;
107 msg.AppendPrintf(
108 "Framebuffer not complete -- error 0x%x, aFBOTextureTarget 0x%x, mFBO "
109 "%d, mTextureHandle %d, aRect.width %d, aRect.height %d",
110 result, aFBOTextureTarget, mFBO, mTextureHandle, mSize.width,
111 mSize.height);
112 NS_ERROR(msg.get());
113 }
114 }
115
116 } // namespace layers
117 } // namespace mozilla
118