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// Copyright 2015 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 "content/browser/compositor/surface_utils.h"
#include "base/callback_helpers.h"
#include "base/memory/ref_counted.h"
#include "build/build_config.h"
#include "cc/output/copy_output_result.h"
#include "cc/resources/single_release_callback.h"
#include "cc/surfaces/surface_id_allocator.h"
#include "content/common/gpu/client/gl_helper.h"
#include "skia/ext/image_operations.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColorFilter.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/effects/SkLumaColorFilter.h"
#include "ui/gfx/geometry/rect.h"
#if defined(OS_ANDROID)
#include "content/browser/renderer_host/compositor_impl_android.h"
#else
#include "content/browser/compositor/image_transport_factory.h"
#include "ui/compositor/compositor.h"
#endif
namespace {
#if !defined(OS_ANDROID) || defined(USE_AURA)
void CopyFromCompositingSurfaceFinished(
const content::ReadbackRequestCallback& callback,
scoped_ptr<cc::SingleReleaseCallback> release_callback,
scoped_ptr<SkBitmap> bitmap,
scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock,
bool result) {
bitmap_pixels_lock.reset();
gpu::SyncToken sync_token;
if (result) {
content::GLHelper* gl_helper =
content::ImageTransportFactory::GetInstance()->GetGLHelper();
if (gl_helper)
gl_helper->GenerateSyncToken(&sync_token);
}
const bool lost_resource = !sync_token.HasData();
release_callback->Run(sync_token, lost_resource);
callback.Run(*bitmap,
result ? content::READBACK_SUCCESS : content::READBACK_FAILED);
}
#endif
// TODO(wjmaclean): There is significant overlap between
// PrepareTextureCopyOutputResult and CopyFromCompositingSurfaceFinished in
// this file, and the versions in RenderWidgetHostViewAndroid. They should
// be merged. See https://crbug.com/582955
void PrepareTextureCopyOutputResult(
const gfx::Size& dst_size_in_pixel,
const SkColorType color_type,
const content::ReadbackRequestCallback& callback,
scoped_ptr<cc::CopyOutputResult> result) {
#if defined(OS_ANDROID) && !defined(USE_AURA)
// TODO(wjmaclean): See if there's an equivalent pathway for Android and
// implement it here.
callback.Run(SkBitmap(), content::READBACK_FAILED);
#else
DCHECK(result->HasTexture());
base::ScopedClosureRunner scoped_callback_runner(
base::Bind(callback, SkBitmap(), content::READBACK_FAILED));
// TODO(siva.gunturi): We should be able to validate the format here using
// GLHelper::IsReadbackConfigSupported before we processs the result.
// See crbug.com/415682 and crbug.com/415131.
scoped_ptr<SkBitmap> bitmap(new SkBitmap);
if (!bitmap->tryAllocPixels(SkImageInfo::Make(
dst_size_in_pixel.width(), dst_size_in_pixel.height(), color_type,
kOpaque_SkAlphaType))) {
scoped_callback_runner.Reset(base::Bind(
callback, SkBitmap(), content::READBACK_BITMAP_ALLOCATION_FAILURE));
return;
}
content::ImageTransportFactory* factory =
content::ImageTransportFactory::GetInstance();
content::GLHelper* gl_helper = factory->GetGLHelper();
if (!gl_helper)
return;
scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock(
new SkAutoLockPixels(*bitmap));
uint8_t* pixels = static_cast<uint8_t*>(bitmap->getPixels());
cc::TextureMailbox texture_mailbox;
scoped_ptr<cc::SingleReleaseCallback> release_callback;
result->TakeTexture(&texture_mailbox, &release_callback);
DCHECK(texture_mailbox.IsTexture());
ignore_result(scoped_callback_runner.Release());
gl_helper->CropScaleReadbackAndCleanMailbox(
texture_mailbox.mailbox(), texture_mailbox.sync_token(), result->size(),
gfx::Rect(result->size()), dst_size_in_pixel, pixels, color_type,
base::Bind(&CopyFromCompositingSurfaceFinished, callback,
base::Passed(&release_callback), base::Passed(&bitmap),
base::Passed(&bitmap_pixels_lock)),
content::GLHelper::SCALER_QUALITY_GOOD);
#endif
}
void PrepareBitmapCopyOutputResult(
const gfx::Size& dst_size_in_pixel,
const SkColorType preferred_color_type,
const content::ReadbackRequestCallback& callback,
scoped_ptr<cc::CopyOutputResult> result) {
SkColorType color_type = preferred_color_type;
if (color_type != kN32_SkColorType && color_type != kAlpha_8_SkColorType) {
// Switch back to default colortype if format not supported.
color_type = kN32_SkColorType;
}
DCHECK(result->HasBitmap());
scoped_ptr<SkBitmap> source = result->TakeBitmap();
DCHECK(source);
SkBitmap scaled_bitmap;
if (source->width() != dst_size_in_pixel.width() ||
source->height() != dst_size_in_pixel.height()) {
scaled_bitmap = skia::ImageOperations::Resize(
*source, skia::ImageOperations::RESIZE_BEST, dst_size_in_pixel.width(),
dst_size_in_pixel.height());
} else {
scaled_bitmap = *source;
}
if (color_type == kN32_SkColorType) {
DCHECK_EQ(scaled_bitmap.colorType(), kN32_SkColorType);
callback.Run(scaled_bitmap, content::READBACK_SUCCESS);
return;
}
DCHECK_EQ(color_type, kAlpha_8_SkColorType);
// The software path currently always returns N32 bitmap regardless of the
// |color_type| we ask for.
DCHECK_EQ(scaled_bitmap.colorType(), kN32_SkColorType);
// Paint |scaledBitmap| to alpha-only |grayscale_bitmap|.
SkBitmap grayscale_bitmap;
bool success = grayscale_bitmap.tryAllocPixels(
SkImageInfo::MakeA8(scaled_bitmap.width(), scaled_bitmap.height()));
if (!success) {
callback.Run(SkBitmap(), content::READBACK_BITMAP_ALLOCATION_FAILURE);
return;
}
SkCanvas canvas(grayscale_bitmap);
SkPaint paint;
skia::RefPtr<SkColorFilter> filter =
skia::AdoptRef(SkLumaColorFilter::Create());
paint.setColorFilter(filter.get());
canvas.drawBitmap(scaled_bitmap, SkIntToScalar(0), SkIntToScalar(0), &paint);
callback.Run(grayscale_bitmap, content::READBACK_SUCCESS);
}
} // namespace
namespace content {
scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() {
#if defined(OS_ANDROID)
return CompositorImpl::CreateSurfaceIdAllocator();
#else
ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
return factory->GetContextFactory()->CreateSurfaceIdAllocator();
#endif
}
cc::SurfaceManager* GetSurfaceManager() {
#if defined(OS_ANDROID)
return CompositorImpl::GetSurfaceManager();
#else
ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
return factory->GetSurfaceManager();
#endif
}
void CopyFromCompositingSurfaceHasResult(
const gfx::Size& dst_size_in_pixel,
const SkColorType color_type,
const ReadbackRequestCallback& callback,
scoped_ptr<cc::CopyOutputResult> result) {
if (result->IsEmpty() || result->size().IsEmpty()) {
callback.Run(SkBitmap(), READBACK_FAILED);
return;
}
gfx::Size output_size_in_pixel;
if (dst_size_in_pixel.IsEmpty())
output_size_in_pixel = result->size();
else
output_size_in_pixel = dst_size_in_pixel;
if (result->HasTexture()) {
// GPU-accelerated path
PrepareTextureCopyOutputResult(output_size_in_pixel, color_type, callback,
std::move(result));
return;
}
DCHECK(result->HasBitmap());
// Software path
PrepareBitmapCopyOutputResult(output_size_in_pixel, color_type, callback,
std::move(result));
}
} // namespace content
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