blob: 48ed1355da00fc69e89e0619880422995ddddadb [file] [log] [blame]
/*
* 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
2, // kPixelFormatA16
};
} // 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