1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
8 #ifndef GL_GLEXT_PROTOTYPES
9 #define GL_GLEXT_PROTOTYPES 1
11 #include <GLES2/gl2ext.h>
12 #include <GLES2/gl2extchromium.h>
16 #include "base/atomicops.h"
17 #include "base/bind.h"
18 #include "base/bind_helpers.h"
19 #include "base/callback.h"
20 #include "base/logging.h"
21 #include "gpu/command_buffer/client/gles2_implementation.h"
22 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
23 #include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
24 #include "ui/gfx/size.h"
25 #include "ui/gl/gl_implementation.h"
27 using gpu::gles2::GLES2Implementation;
28 using gpu::GLInProcessContext;
34 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
35 WebGraphicsContext3DInProcessCommandBufferImpl::CreateViewContext(
36 const blink::WebGraphicsContext3D::Attributes& attributes,
37 bool lose_context_when_out_of_memory,
38 gfx::AcceleratedWidget window) {
39 DCHECK_NE(gfx::GetGLImplementation(), gfx::kGLImplementationNone);
40 bool is_offscreen = false;
41 return make_scoped_ptr(new WebGraphicsContext3DInProcessCommandBufferImpl(
42 scoped_ptr< ::gpu::GLInProcessContext>(),
44 lose_context_when_out_of_memory,
50 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
51 WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
52 const blink::WebGraphicsContext3D::Attributes& attributes,
53 bool lose_context_when_out_of_memory) {
54 bool is_offscreen = true;
55 return make_scoped_ptr(new WebGraphicsContext3DInProcessCommandBufferImpl(
56 scoped_ptr< ::gpu::GLInProcessContext>(),
58 lose_context_when_out_of_memory,
60 gfx::kNullAcceleratedWidget));
63 scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
64 WebGraphicsContext3DInProcessCommandBufferImpl::WrapContext(
65 scoped_ptr< ::gpu::GLInProcessContext> context,
66 const blink::WebGraphicsContext3D::Attributes& attributes) {
67 bool lose_context_when_out_of_memory = false; // Not used.
68 bool is_offscreen = true; // Not used.
69 return make_scoped_ptr(new WebGraphicsContext3DInProcessCommandBufferImpl(
72 lose_context_when_out_of_memory,
74 gfx::kNullAcceleratedWidget /* window. Not used. */));
77 WebGraphicsContext3DInProcessCommandBufferImpl::
78 WebGraphicsContext3DInProcessCommandBufferImpl(
79 scoped_ptr< ::gpu::GLInProcessContext> context,
80 const blink::WebGraphicsContext3D::Attributes& attributes,
81 bool lose_context_when_out_of_memory,
83 gfx::AcceleratedWidget window)
84 : share_resources_(attributes.shareResources),
85 webgl_context_(attributes.webGL),
86 is_offscreen_(is_offscreen),
88 context_(context.Pass()) {
89 ConvertAttributes(attributes, &attribs_);
90 attribs_.lose_context_when_out_of_memory = lose_context_when_out_of_memory;
93 WebGraphicsContext3DInProcessCommandBufferImpl::
94 ~WebGraphicsContext3DInProcessCommandBufferImpl() {
97 size_t WebGraphicsContext3DInProcessCommandBufferImpl::GetMappedMemoryLimit() {
98 return context_->GetMappedMemoryLimit();
101 bool WebGraphicsContext3DInProcessCommandBufferImpl::MaybeInitializeGL() {
105 if (initialize_failed_)
109 // TODO(kbr): More work will be needed in this implementation to
110 // properly support GPU switching. Like in the out-of-process
111 // command buffer implementation, all previously created contexts
112 // will need to be lost either when the first context requesting the
113 // discrete GPU is created, or the last one is destroyed.
114 gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
115 context_.reset(GLInProcessContext::Create(
121 NULL, /* share_context */
125 ::gpu::GLInProcessContextSharedMemoryLimits()));
129 base::Closure context_lost_callback = base::Bind(
130 &WebGraphicsContext3DInProcessCommandBufferImpl::OnContextLost,
131 base::Unretained(this));
132 context_->SetContextLostCallback(context_lost_callback);
134 initialize_failed_ = true;
138 real_gl_ = context_->GetImplementation();
139 setGLInterface(real_gl_);
141 if (real_gl_ && webgl_context_)
142 real_gl_->EnableFeatureCHROMIUM("webgl_enable_glsl_webgl_validation");
149 WebGraphicsContext3DInProcessCommandBufferImpl::InitializeOnCurrentThread() {
150 if (!MaybeInitializeGL())
152 return context_ && !isContextLost();
155 bool WebGraphicsContext3DInProcessCommandBufferImpl::isContextLost() {
156 return context_lost_reason_ != GL_NO_ERROR;
159 WGC3Denum WebGraphicsContext3DInProcessCommandBufferImpl::
160 getGraphicsResetStatusARB() {
161 return context_lost_reason_;
164 ::gpu::ContextSupport*
165 WebGraphicsContext3DInProcessCommandBufferImpl::GetContextSupport() {
169 void WebGraphicsContext3DInProcessCommandBufferImpl::OnContextLost() {
170 // TODO(kbr): improve the precision here.
171 context_lost_reason_ = GL_UNKNOWN_CONTEXT_RESET_ARB;
172 if (context_lost_callback_) {
173 context_lost_callback_->onContextLost();
178 } // namespace webkit