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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if USE(ACCELERATED_COMPOSITING)
#include "VideoLayerChromium.h"
#include "LayerRendererChromium.h"
#include "RenderLayerBacking.h"
#include "skia/ext/platform_canvas.h"
#include <GLES2/gl2.h>
#define GL_GLEXT_PROTOTYPES
#include <GLES2/gl2ext.h>
#if PLATFORM(SKIA)
#include "NativeImageSkia.h"
#include "PlatformContextSkia.h"
#endif
namespace WebCore {
PassRefPtr<VideoLayerChromium> VideoLayerChromium::create(GraphicsLayerChromium* owner,
VideoFrameProvider* provider)
{
return adoptRef(new VideoLayerChromium(owner, provider));
}
VideoLayerChromium::VideoLayerChromium(GraphicsLayerChromium* owner, VideoFrameProvider* provider)
: ContentLayerChromium(owner)
#if PLATFORM(SKIA)
, m_canvas(0)
, m_skiaContext(0)
#endif
, m_graphicsContext(0)
, m_provider(provider)
{
}
void VideoLayerChromium::updateContents()
{
RenderLayerBacking* backing = static_cast<RenderLayerBacking*>(m_owner->client());
if (!backing || backing->paintingGoesToWindow())
return;
ASSERT(drawsContent());
IntRect dirtyRect(m_dirtyRect);
IntSize requiredTextureSize;
#if PLATFORM(SKIA)
requiredTextureSize = m_bounds;
IntRect boundsRect(IntPoint(0, 0), m_bounds);
// If the texture needs to be reallocated, then we must redraw the entire
// contents of the layer.
if (requiredTextureSize != m_allocatedTextureSize)
dirtyRect = boundsRect;
else {
// Clip the dirtyRect to the size of the layer to avoid drawing outside
// the bounds of the backing texture.
dirtyRect.intersect(boundsRect);
}
if (!m_canvas.get()
|| dirtyRect.width() != m_canvas->getDevice()->width()
|| dirtyRect.height() != m_canvas->getDevice()->height()) {
m_canvas = new skia::PlatformCanvas(dirtyRect.width(), dirtyRect.height(), true);
m_skiaContext = new PlatformContextSkia(m_canvas.get());
// This is needed to get text to show up correctly.
// FIXME: Does this take us down a very slow text rendering path?
m_skiaContext->setDrawingToImageBuffer(true);
m_graphicsContext = new GraphicsContext(reinterpret_cast<PlatformGraphicsContext*>(m_skiaContext.get()));
}
// Bring the canvas into the coordinate system of the paint rect.
m_canvas->translate(static_cast<SkScalar>(-dirtyRect.x()), static_cast<SkScalar>(-dirtyRect.y()));
// FIXME: Remove this test when tiled layers are implemented.
m_skipsDraw = false;
if (!layerRenderer()->checkTextureSize(requiredTextureSize)) {
m_skipsDraw = true;
return;
}
unsigned textureId = m_contentsTexture;
if (!textureId)
textureId = layerRenderer()->createLayerTexture();
// If the texture id or size changed since last time, then we need to tell GL
// to re-allocate a texture.
if (m_contentsTexture != textureId || requiredTextureSize != m_allocatedTextureSize)
createTextureRect(requiredTextureSize, dirtyRect, textureId);
else
updateTextureRect(dirtyRect, textureId);
#else
// FIXME: Implement non-skia path
notImplemented();
#endif
}
void VideoLayerChromium::createTextureRect(const IntSize& requiredTextureSize, const IntRect& updateRect, unsigned textureId)
{
// Paint into graphics context and get bitmap.
m_owner->paintGraphicsLayerContents(*m_graphicsContext, updateRect);
void* pixels = 0;
IntSize bitmapSize = IntSize();
#if PLATFORM(SKIA)
const SkBitmap& bitmap = m_canvas->getDevice()->accessBitmap(false);
const SkBitmap* skiaBitmap = &bitmap;
ASSERT(skiaBitmap);
SkAutoLockPixels lock(*skiaBitmap);
SkBitmap::Config skiaConfig = skiaBitmap->config();
// FIXME: Do we need to support more image configurations?
if (skiaConfig == SkBitmap::kARGB_8888_Config) {
pixels = skiaBitmap->getPixels();
bitmapSize = IntSize(skiaBitmap->width(), skiaBitmap->height());
}
#else
// FIXME: Implement non-skia path
notImplemented();
#endif
if (!pixels)
return;
glBindTexture(GL_TEXTURE_2D, textureId);
ASSERT(bitmapSize == requiredTextureSize);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, requiredTextureSize.width(), requiredTextureSize.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
m_contentsTexture = textureId;
m_allocatedTextureSize = requiredTextureSize;
updateCompleted();
}
void VideoLayerChromium::updateTextureRect(const IntRect& updateRect, unsigned textureId)
{
#if PLATFORM(SKIA)
const SkBitmap& bitmap = m_canvas->getDevice()->accessBitmap(true);
SkBitmap* skiaBitmap = const_cast<SkBitmap*>(&bitmap);
ASSERT(skiaBitmap);
SkAutoLockPixels lock(*skiaBitmap);
SkBitmap::Config skiaConfig = skiaBitmap->config();
if (skiaConfig == SkBitmap::kARGB_8888_Config) {
glBindTexture(GL_TEXTURE_2D, textureId);
void* mem = glMapTexSubImage2D(GL_TEXTURE_2D, 0, updateRect.x(), updateRect.y(), updateRect.width(), updateRect.height(), GL_RGBA, GL_UNSIGNED_BYTE, GL_WRITE_ONLY);
skiaBitmap->setPixels(mem);
m_owner->paintGraphicsLayerContents(*m_graphicsContext, updateRect);
glUnmapTexSubImage2D(mem);
}
updateCompleted();
#else
// FIXME: Implement non-skia path
notImplemented();
#endif
}
void VideoLayerChromium::updateCompleted()
{
m_dirtyRect.setSize(FloatSize());
m_contentsDirty = false;
}
}
#endif // USE(ACCELERATED_COMPOSITING)
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