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/*
* Copyright 2012, The Android Open Source Project
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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.
*/
#define LOG_TAG "CanvasLayer"
#define LOG_NDEBUG 1
#include "config.h"
#include "CanvasLayer.h"
#if USE(ACCELERATED_COMPOSITING)
#include "AndroidLog.h"
#include "CanvasTexture.h"
#include "DrawQuadData.h"
#include "Image.h"
#include "ImageBuffer.h"
#include "RenderLayerCompositor.h"
#include "SkBitmap.h"
#include "SkBitmapRef.h"
#include "SkCanvas.h"
#include "TilesManager.h"
namespace WebCore {
CanvasLayer::CanvasLayer(RenderLayer* owner, HTMLCanvasElement* canvas)
: LayerAndroid(owner)
, m_canvas(canvas)
, m_dirtyCanvas()
, m_bitmap(0)
{
init();
m_canvas->addObserver(this);
}
CanvasLayer::CanvasLayer(const CanvasLayer& layer)
: LayerAndroid(layer)
, m_canvas(0)
, m_bitmap(0)
{
init();
if (!layer.m_canvas) {
// The canvas has already been destroyed - this shouldn't happen
ALOGW("Creating a CanvasLayer for a destroyed canvas!");
m_contentRect = IntRect();
m_offsetFromRenderer = IntSize();
m_texture->setHwAccelerated(false);
return;
}
// We are making a copy for the UI, sync the interesting bits
m_contentRect = layer.contentRect();
m_offsetFromRenderer = layer.offsetFromRenderer();
bool previousState = m_texture->hasValidTexture();
if (!previousState && layer.m_dirtyCanvas.isEmpty()) {
// We were previously in software and don't have anything new to draw,
// so stay in software
m_bitmap = layer.bitmap();
SkSafeRef(m_bitmap);
} else {
// Attempt to upload to a surface texture
if (!m_texture->uploadImageBuffer(layer.m_canvas->buffer())) {
// Blargh, no surface texture or ImageBuffer - fall back to software
m_bitmap = layer.bitmap();
SkSafeRef(m_bitmap);
// Merge the canvas invals with the layer's invals to repaint the needed
// tiles.
SkRegion::Iterator iter(layer.m_dirtyCanvas);
const IntPoint& offset = m_contentRect.location();
for (; !iter.done(); iter.next()) {
SkIRect diff = iter.rect();
diff.fLeft += offset.x();
diff.fRight += offset.x();
diff.fTop += offset.y();
diff.fBottom += offset.y();
m_dirtyRegion.op(diff, SkRegion::kUnion_Op);
}
}
if (previousState != m_texture->hasValidTexture()) {
// Need to do a full inval of the canvas content as we are mode switching
m_dirtyRegion.op(m_contentRect.x(), m_contentRect.y(),
m_contentRect.maxX(), m_contentRect.maxY(), SkRegion::kUnion_Op);
}
}
}
CanvasLayer::~CanvasLayer()
{
if (m_canvas)
m_canvas->removeObserver(this);
SkSafeUnref(m_bitmap);
}
void CanvasLayer::init()
{
m_texture = CanvasTexture::getCanvasTexture(this);
}
void CanvasLayer::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect)
{
if (!m_texture->hasValidTexture()) {
// We only need to track invals if we aren't using a SurfaceTexture.
// If we drop out of hwa, we will do a full inval anyway
SkIRect irect = SkIRect::MakeXYWH(changedRect.x(), changedRect.y(),
changedRect.width(), changedRect.height());
m_dirtyCanvas.op(irect, SkRegion::kUnion_Op);
}
owningLayer()->compositor()->scheduleLayerFlush();
}
void CanvasLayer::canvasResized(HTMLCanvasElement*)
{
const IntSize& size = m_canvas->size();
m_dirtyCanvas.setRect(0, 0, size.width(), size.height());
// If we are smaller than one tile, don't bother using a surface texture
if (size.width() <= TilesManager::tileWidth()
&& size.height() <= TilesManager::tileHeight())
m_texture->setSize(IntSize());
else
m_texture->setSize(size);
}
void CanvasLayer::canvasDestroyed(HTMLCanvasElement*)
{
m_canvas = 0;
}
void CanvasLayer::clearDirtyRegion()
{
LayerAndroid::clearDirtyRegion();
m_dirtyCanvas.setEmpty();
if (m_canvas)
m_canvas->clearDirtyRect();
}
SkBitmapRef* CanvasLayer::bitmap() const
{
if (!m_canvas || !m_canvas->buffer())
return 0;
return m_canvas->copiedImage()->nativeImageForCurrentFrame();
}
IntRect CanvasLayer::contentRect() const
{
if (!m_canvas
|| !m_canvas->renderer()
|| !m_canvas->renderer()->style()
|| !m_canvas->inDocument()
|| m_canvas->renderer()->style()->visibility() != VISIBLE)
return IntRect();
return m_canvas->renderBox()->contentBoxRect();
}
IntSize CanvasLayer::offsetFromRenderer() const
{
return m_canvas->renderBox()->layer()->backing()->graphicsLayer()->offsetFromRenderer();
}
bool CanvasLayer::needsTexture()
{
return m_bitmap || LayerAndroid::needsTexture();
}
void CanvasLayer::contentDraw(SkCanvas* canvas, PaintStyle style)
{
LayerAndroid::contentDraw(canvas, style);
if (!m_bitmap)
return;
SkBitmap& bitmap = m_bitmap->bitmap();
SkRect dst = SkRect::MakeXYWH(m_contentRect.x() - m_offsetFromRenderer.width(),
m_contentRect.y() - m_offsetFromRenderer.height(),
m_contentRect.width(), m_contentRect.height());
canvas->drawBitmapRect(bitmap, 0, dst, 0);
}
bool CanvasLayer::drawGL(bool layerTilesDisabled)
{
bool ret = LayerAndroid::drawGL(layerTilesDisabled);
m_texture->requireTexture();
if (!m_bitmap && m_texture->updateTexImage()) {
SkRect rect = SkRect::MakeXYWH(m_contentRect.x() - m_offsetFromRenderer.width(),
m_contentRect.y() - m_offsetFromRenderer.height(),
m_contentRect.width(), m_contentRect.height());
TextureQuadData data(m_texture->texture(), GL_TEXTURE_EXTERNAL_OES,
GL_LINEAR, LayerQuad, &m_drawTransform, &rect);
TilesManager::instance()->shader()->drawQuad(&data);
}
return ret;
}
LayerAndroid::InvalidateFlags CanvasLayer::onSetHwAccelerated(bool hwAccelerated)
{
if (m_texture->setHwAccelerated(hwAccelerated))
return LayerAndroid::InvalidateLayers;
return LayerAndroid::InvalidateNone;
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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