| /* |
| * Copyright 2016 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "glimp/gles/pixel_format.h" |
| |
| namespace glimp { |
| namespace gles { |
| |
| namespace { |
| |
| // Must match the ordering of the PixelFormat enum defined in pixel_format.h. |
| const int kBytesPerPixel[] = { |
| 4, // kPixelFormatRGBA8 |
| 4, // kPixelFormatARGB8 |
| 4, // kPixelFormatBGRA8 |
| 2, // kPixelFormatRGB565 |
| 2, // kPixelFormatBA8 |
| 1, // kPixelFormatA8 |
| }; |
| |
| } // namespace |
| |
| int BytesPerPixel(PixelFormat format) { |
| SB_COMPILE_ASSERT(SB_ARRAY_SIZE(kBytesPerPixel) == kPixelFormatNumFormats, |
| kBytesPerPixel_has_entries_for_each_enum_PixelFormat); |
| if (kPixelFormatInvalid == format) { |
| return 0; // Invalid formats have 0 bytes per pixel. |
| } |
| |
| if (format < 0 || format >= kPixelFormatNumFormats) { |
| SB_DCHECK(false) << "Invalid PixelFormat: " << format; |
| return 0; |
| } |
| return kBytesPerPixel[format]; |
| } |
| |
| } // namespace gles |
| } // namespace glimp |