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// Copyright 2013 The Chromium Authors
// 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/notreached.h"
#include "base/trace_event/trace_event.h"
#include "cc/raster/raster_buffer.h"
#include "cc/raster/raster_source.h"
#include "components/viz/common/resources/platform_color.h"
#include "components/viz/common/resources/shared_image_format_utils.h"
#include "skia/ext/legacy_display_globals.h"
#include "third_party/skia/include/core/SkAlphaType.h"
#include "third_party/skia/include/core/SkBlendMode.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColorSpace.h"
#include "third_party/skia/include/core/SkColorType.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/core/SkSurfaceProps.h"
#include "ui/gfx/geometry/axis_transform2d.h"
namespace cc {
RasterBufferProvider::RasterBufferProvider() = default;
RasterBufferProvider::~RasterBufferProvider() = default;
namespace {
bool IsSupportedPlaybackToMemoryFormat(viz::SharedImageFormat format) {
return (format == viz::SinglePlaneFormat::kRGBA_4444) ||
(format == viz::SinglePlaneFormat::kRGBA_8888) ||
(format == viz::SinglePlaneFormat::kBGRA_8888) ||
(format == viz::SinglePlaneFormat::kRGBA_F16);
}
} // anonymous namespace
// static
void RasterBufferProvider::PlaybackToMemory(
void* memory,
viz::SharedImageFormat format,
const gfx::Size& size,
size_t stride,
const RasterSource* raster_source,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
const gfx::AxisTransform2d& transform,
const gfx::ColorSpace& target_color_space,
const RasterSource::PlaybackSettings& playback_settings) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("cc.debug"),
"RasterBufferProvider::PlaybackToMemory");
DCHECK(IsSupportedPlaybackToMemoryFormat(format)) << format.ToString();
SkColorType color_type = ToClosestSkColorType(format);
// Uses kPremul_SkAlphaType since the result is not known to be opaque.
SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), color_type,
kPremul_SkAlphaType,
target_color_space.ToSkColorSpace());
// Use unknown pixel geometry to disable LCD text.
SkSurfaceProps surface_props(0, kUnknown_SkPixelGeometry);
if (playback_settings.use_lcd_text) {
surface_props = skia::LegacyDisplayGlobals::GetSkSurfaceProps();
}
if (!stride)
stride = info.minRowBytes();
DCHECK_GT(stride, 0u);
gfx::Size content_size = raster_source->GetContentSize(transform.scale());
if ((format == viz::SinglePlaneFormat::kRGBA_8888) ||
(format == viz::SinglePlaneFormat::kBGRA_8888) ||
(format == viz::SinglePlaneFormat::kRGBA_F16)) {
sk_sp<SkSurface> surface =
SkSurfaces::WrapPixels(info, memory, stride, &surface_props);
// There are some rare crashes where this doesn't succeed and may be
// indicative of memory stomps elsewhere. Instead of displaying
// invalid content, just crash the renderer and try again.
// See: http://crbug.com/721744.
CHECK(surface);
raster_source->PlaybackToCanvas(surface->getCanvas(), content_size,
canvas_bitmap_rect, canvas_playback_rect,
transform, playback_settings);
return;
}
if (format == viz::SinglePlaneFormat::kRGBA_4444) {
sk_sp<SkSurface> surface = SkSurfaces::Raster(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(), content_size,
canvas_bitmap_rect, canvas_bitmap_rect,
transform, playback_settings);
TRACE_EVENT0("cc",
"RasterBufferProvider::PlaybackToMemory::ConvertRGBA4444");
SkImageInfo dst_info = info.makeColorType(color_type);
auto dst_canvas =
SkCanvas::MakeRasterDirect(dst_info, memory, stride, &surface_props);
DCHECK(dst_canvas);
SkPaint paint;
paint.setDither(true);
paint.setBlendMode(SkBlendMode::kSrc);
surface->draw(dst_canvas.get(), 0, 0, SkSamplingOptions(), &paint);
return;
}
NOTREACHED();
}
void RasterBufferProvider::FlushIfNeeded() {
if (!needs_flush_) {
return;
}
Flush();
needs_flush_ = false;
}
} // namespace cc
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