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1 // Copyright 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. | |
4 | |
5 #include "cc/resource.h" | |
6 #include "third_party/khronos/GLES2/gl2ext.h" | |
7 | |
8 namespace cc { | |
9 | |
10 void Resource::set_dimensions(const gfx::Size& size, GLenum format) { | |
11 size_ = size; | |
12 format_ = format; | |
13 } | |
14 | |
15 size_t Resource::bytes() const { | |
16 if (size_.IsEmpty()) | |
17 return 0; | |
18 | |
19 return MemorySizeBytes(size_, format_); | |
20 } | |
21 | |
22 size_t Resource::BytesPerPixel(GLenum format) { | |
23 size_t components_per_pixel = 0; | |
24 size_t bytes_per_component = 1; | |
25 switch (format) { | |
26 case GL_RGBA: | |
27 case GL_BGRA_EXT: | |
28 components_per_pixel = 4; | |
29 break; | |
30 case GL_LUMINANCE: | |
31 components_per_pixel = 1; | |
32 break; | |
33 default: | |
34 NOTREACHED(); | |
35 } | |
36 return components_per_pixel * bytes_per_component; | |
37 } | |
38 | |
39 size_t Resource::MemorySizeBytes(const gfx::Size& size, GLenum format) { | |
40 return BytesPerPixel(format) * size.width() * size.height(); | |
41 } | |
42 | |
43 | |
44 } // namespace cc | |
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