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// 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 "cobalt/renderer/rasterizer/skia/gl_format_conversions.h"
#include <GLES2/gl2ext.h>
namespace cobalt {
namespace renderer {
namespace rasterizer {
namespace skia {
GLenum ConvertRenderTreeFormatToGL(render_tree::PixelFormat pixel_format) {
switch (pixel_format) {
case render_tree::kPixelFormatRGBA8:
case render_tree::kPixelFormatUYVY:
return GL_RGBA;
// Our Skia GL backend has no reason to distinguish between Y/U/V textures,
// they can all be treated as 8-bit greyscale alpha channels, expressed by
// GL_ALPHA.
case render_tree::kPixelFormatY8:
return GL_ALPHA;
case render_tree::kPixelFormatU8:
return GL_ALPHA;
case render_tree::kPixelFormatV8:
return GL_ALPHA;
case render_tree::kPixelFormatUV8:
return GL_LUMINANCE_ALPHA;
default: { NOTREACHED() << "Unknown format."; }
}
return GL_RGBA;
}
GrPixelConfig ConvertGLFormatToGr(GLenum gl_format) {
switch (gl_format) {
case GL_RGBA:
return kRGBA_8888_GrPixelConfig;
case GL_BGRA_EXT:
return kBGRA_8888_GrPixelConfig;
case GL_ALPHA:
return kAlpha_8_GrPixelConfig;
case GL_LUMINANCE_ALPHA:
return kRGBA_8888_GrPixelConfig;
default: { NOTREACHED() << "Unsupported GL format."; }
}
return kRGBA_8888_GrPixelConfig;
}
} // namespace skia
} // namespace rasterizer
} // namespace renderer
} // namespace cobalt