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// Copyright 2013 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 "cc/raster/raster_buffer_provider.h"
#include <stddef.h>
#include "base/trace_event/trace_event.h"
#include "cc/playback/raster_source.h"
#include "cc/raster/texture_compressor.h"
#include "cc/resources/platform_color.h"
#include "cc/resources/resource_format_utils.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkSurface.h"
namespace cc {
RasterBufferProvider::RasterBufferProvider() {}
RasterBufferProvider::~RasterBufferProvider() {}
namespace {
bool IsSupportedPlaybackToMemoryFormat(ResourceFormat format) {
switch (format) {
case RGBA_4444:
case RGBA_8888:
case BGRA_8888:
case RGBA_F16:
case ETC1:
return true;
case ALPHA_8:
case LUMINANCE_8:
case RGB_565:
case RED_8:
case LUMINANCE_F16:
return false;
}
NOTREACHED();
return false;
}
} // anonymous namespace
// static
void RasterBufferProvider::PlaybackToMemory(
void* memory,
ResourceFormat format,
const gfx::Size& size,
size_t stride,
const RasterSource* raster_source,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
float scale,
sk_sp<SkColorSpace> dst_color_space,
const RasterSource::PlaybackSettings& playback_settings) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("cc.debug"),
"RasterBufferProvider::PlaybackToMemory");
DCHECK(IsSupportedPlaybackToMemoryFormat(format)) << format;
// Uses kPremul_SkAlphaType since the result is not known to be opaque.
SkImageInfo info = SkImageInfo::MakeN32(size.width(), size.height(),
kPremul_SkAlphaType, dst_color_space);
// Use unknown pixel geometry to disable LCD text.
SkSurfaceProps surface_props(0, kUnknown_SkPixelGeometry);
if (raster_source->CanUseLCDText()) {
// LegacyFontHost will get LCD text and skia figures out what type to use.
surface_props = SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType);
}
if (!stride)
stride = info.minRowBytes();
DCHECK_GT(stride, 0u);
switch (format) {
case RGBA_8888:
case BGRA_8888:
case RGBA_F16: {
sk_sp<SkSurface> surface =
SkSurface::MakeRasterDirect(info, memory, stride, &surface_props);
raster_source->PlaybackToCanvas(surface->getCanvas(), canvas_bitmap_rect,
canvas_playback_rect, scale,
playback_settings);
return;
}
case RGBA_4444:
case ETC1: {
sk_sp<SkSurface> surface = SkSurface::MakeRaster(info, &surface_props);
// TODO(reveman): Improve partial raster support by reducing the size of
// playback rect passed to PlaybackToCanvas. crbug.com/519070
raster_source->PlaybackToCanvas(surface->getCanvas(), canvas_bitmap_rect,
canvas_bitmap_rect, scale,
playback_settings);
if (format == ETC1) {
TRACE_EVENT0("cc",
"RasterBufferProvider::PlaybackToMemory::CompressETC1");
DCHECK_EQ(size.width() % 4, 0);
DCHECK_EQ(size.height() % 4, 0);
std::unique_ptr<TextureCompressor> texture_compressor =
TextureCompressor::Create(TextureCompressor::kFormatETC1);
SkPixmap pixmap;
surface->peekPixels(&pixmap);
texture_compressor->Compress(
reinterpret_cast<const uint8_t*>(pixmap.addr()),
reinterpret_cast<uint8_t*>(memory), size.width(), size.height(),
TextureCompressor::kQualityHigh);
} else {
TRACE_EVENT0("cc",
"RasterBufferProvider::PlaybackToMemory::ConvertRGBA4444");
SkImageInfo dst_info =
info.makeColorType(ResourceFormatToClosestSkColorType(format));
bool rv = surface->readPixels(dst_info, memory, stride, 0, 0);
DCHECK(rv);
}
return;
}
case ALPHA_8:
case LUMINANCE_8:
case RGB_565:
case RED_8:
case LUMINANCE_F16:
NOTREACHED();
return;
}
NOTREACHED();
}
bool RasterBufferProvider::ResourceFormatRequiresSwizzle(
ResourceFormat format) {
switch (format) {
case RGBA_8888:
case BGRA_8888:
// Initialize resource using the preferred PlatformColor component
// order and swizzle in the shader instead of in software.
return !PlatformColor::SameComponentOrder(format);
case RGBA_4444:
case ETC1:
case ALPHA_8:
case LUMINANCE_8:
case RGB_565:
case RED_8:
case LUMINANCE_F16:
case RGBA_F16:
return false;
}
NOTREACHED();
return false;
}
} // namespace cc
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