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Side by Side Diff: ui/gl/gl_image_shm.cc

Issue 20017005: gpu: Refactor GpuMemoryBuffer framework for multi-process support. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 5 months ago
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1 // Copyright (c) 2013 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.
4
5 #include "ui/gl/gl_image_shm.h"
6
7 #include "base/debug/trace_event.h"
8 #include "base/process_util.h"
9 #include "ui/gl/gl_bindings.h"
10
11 namespace gfx {
12
13 GLImageShm::GLImageShm(gfx::Size size) : size_(size) {
14 }
15
16 GLImageShm::~GLImageShm() {
17 Destroy();
18 }
19
20 bool GLImageShm::Initialize(gfx::GpuMemoryBufferHandle buffer) {
21 if (!base::SharedMemory::IsHandleValid(buffer.handle))
22 return false;
23
24 base::SharedMemory shared_memory(buffer.handle, true);
25
26 // Duplicate the handle.
27 base::SharedMemoryHandle duped_shared_memory_handle;
28 if (!shared_memory.ShareToProcess(base::GetCurrentProcessHandle(),
29 &duped_shared_memory_handle)) {
30 DVLOG(0) << "Failed to duplicate shared memory handle.";
31 return false;
32 }
33
34 shared_memory_.reset(
35 new base::SharedMemory(duped_shared_memory_handle, true));
36 return true;
37 }
38
39 bool GLImageShm::BindTexImage() {
40 TRACE_EVENT0("gpu", "GLImageShm::BindTexImage");
41 DCHECK(shared_memory_);
42
43 const int kBytesPerPixel = 4;
44 size_t size = size_.GetArea() * kBytesPerPixel;
45 DCHECK(!shared_memory_->memory());
46 if (!shared_memory_->Map(size)) {
47 DVLOG(0) << "Failed to map shared memory.";
48 return false;
49 }
50
51 DCHECK(shared_memory_->memory());
52 glTexImage2D(GL_TEXTURE_2D,
53 0, // mip level
54 GL_RGBA8_OES,
55 size_.width(),
56 size_.height(),
57 0, // border
58 GL_BGRA,
59 GL_UNSIGNED_BYTE,
60 shared_memory_->memory());
61
62 shared_memory_->Unmap();
63 return true;
64 }
65
66 gfx::Size GLImageShm::GetSize() {
67 return size_;
68 }
69
70 void GLImageShm::Destroy() {
71 }
72
73 void GLImageShm::ReleaseTexImage() {
74 }
75
76 } // namespace gfx
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