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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/image_factory.h"
#include "gpu/command_buffer/common/capabilities.h"
#include "ui/gl/gl_bindings.h"
namespace gpu {
ImageFactory::ImageFactory() {
}
ImageFactory::~ImageFactory() {
}
// static
gfx::GpuMemoryBuffer::Format ImageFactory::ImageFormatToGpuMemoryBufferFormat(
unsigned internalformat) {
switch (internalformat) {
case GL_R8:
return gfx::GpuMemoryBuffer::R_8;
case GL_RGB:
return gfx::GpuMemoryBuffer::RGBX_8888;
case GL_RGBA:
return gfx::GpuMemoryBuffer::RGBA_8888;
case GL_BGRA_EXT:
return gfx::GpuMemoryBuffer::BGRA_8888;
case GL_ATC_RGB_AMD:
return gfx::GpuMemoryBuffer::ATC;
case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
return gfx::GpuMemoryBuffer::ATCIA;
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
return gfx::GpuMemoryBuffer::DXT1;
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
return gfx::GpuMemoryBuffer::DXT5;
case GL_ETC1_RGB8_OES:
return gfx::GpuMemoryBuffer::ETC1;
case GL_RGB_YUV_420_CHROMIUM:
return gfx::GpuMemoryBuffer::YUV_420;
default:
NOTREACHED();
return gfx::GpuMemoryBuffer::RGBA_8888;
}
}
// static
gfx::GpuMemoryBuffer::Usage ImageFactory::ImageUsageToGpuMemoryBufferUsage(
unsigned usage) {
switch (usage) {
case GL_MAP_CHROMIUM:
return gfx::GpuMemoryBuffer::MAP;
case GL_SCANOUT_CHROMIUM:
return gfx::GpuMemoryBuffer::SCANOUT;
default:
NOTREACHED();
return gfx::GpuMemoryBuffer::MAP;
}
}
// static
bool ImageFactory::IsImageFormatCompatibleWithGpuMemoryBufferFormat(
unsigned internalformat,
gfx::GpuMemoryBuffer::Format format) {
return ImageFormatToGpuMemoryBufferFormat(internalformat) == format;
}
// static
bool ImageFactory::IsGpuMemoryBufferFormatSupported(
gfx::GpuMemoryBuffer::Format format,
const gpu::Capabilities& capabilities) {
switch (format) {
case gfx::GpuMemoryBuffer::ATC:
case gfx::GpuMemoryBuffer::ATCIA:
return capabilities.texture_format_atc;
case gfx::GpuMemoryBuffer::BGRA_8888:
return capabilities.texture_format_bgra8888;
case gfx::GpuMemoryBuffer::DXT1:
return capabilities.texture_format_dxt1;
case gfx::GpuMemoryBuffer::DXT5:
return capabilities.texture_format_dxt5;
case gfx::GpuMemoryBuffer::ETC1:
return capabilities.texture_format_etc1;
case gfx::GpuMemoryBuffer::R_8:
return capabilities.texture_rg;
case gfx::GpuMemoryBuffer::RGBA_4444:
case gfx::GpuMemoryBuffer::RGBA_8888:
case gfx::GpuMemoryBuffer::RGBX_8888:
case gfx::GpuMemoryBuffer::YUV_420:
return true;
}
NOTREACHED();
return false;
}
// static
bool ImageFactory::IsImageSizeValidForGpuMemoryBufferFormat(
const gfx::Size& size,
gfx::GpuMemoryBuffer::Format format) {
switch (format) {
case gfx::GpuMemoryBuffer::ATC:
case gfx::GpuMemoryBuffer::ATCIA:
case gfx::GpuMemoryBuffer::DXT1:
case gfx::GpuMemoryBuffer::DXT5:
case gfx::GpuMemoryBuffer::ETC1:
// Compressed images must have a width and height that's evenly divisible
// by the block size.
return size.width() % 4 == 0 && size.height() % 4 == 0;
case gfx::GpuMemoryBuffer::R_8:
case gfx::GpuMemoryBuffer::RGBA_4444:
case gfx::GpuMemoryBuffer::RGBA_8888:
case gfx::GpuMemoryBuffer::BGRA_8888:
case gfx::GpuMemoryBuffer::RGBX_8888:
return true;
case gfx::GpuMemoryBuffer::YUV_420:
// U and V planes are subsampled by a factor of 2.
return size.width() % 2 == 0 && size.height() % 2 == 0;
}
NOTREACHED();
return false;
}
} // namespace gpu
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