static void paintSkBitmap(PlatformContextSkia* platformContext, const NativeImageSkia& bitmap, const SkIRect& srcRect, const SkRect& destRect, const SkXfermode::Mode& compOp)
{
SkPaint paint;
paint.setXfermodeMode(compOp);
paint.setFilterBitmap(true);
paint.setAlpha(platformContext->getNormalizedAlpha());
paint.setLooper(platformContext->getDrawLooper());
// only antialias if we're rotated or skewed
paint.setAntiAlias(hasNon90rotation(platformContext));
SkCanvas* canvas = platformContext->canvas();
ResamplingMode resampling;
if (platformContext->isAccelerated())
resampling = RESAMPLE_LINEAR;
else
resampling = platformContext->printing() ? RESAMPLE_NONE :
computeResamplingMode(platformContext, bitmap, srcRect.width(), srcRect.height(), SkScalarToFloat(destRect.width()), SkScalarToFloat(destRect.height()));
if (resampling == RESAMPLE_AWESOME) {
drawResampledBitmap(*canvas, paint, bitmap, srcRect, destRect);
} else {
// No resampling necessary, we can just draw the bitmap. We want to
// filter it if we decided to do linear interpolation above, or if there
// is something interesting going on with the matrix (like a rotation).
// Note: for serialization, we will want to subset the bitmap first so
// we don't send extra pixels.
canvas->drawBitmapRect(bitmap.bitmap(), &srcRect, destRect, &paint);
}
}
static void paintSkBitmap(PlatformContextSkia* platformContext, const NativeImageSkia& bitmap, const SkIRect& srcRect, const SkRect& destRect, const SkXfermode::Mode& compOp)
{
#if PLATFORM(CHROMIUM)
TRACE_EVENT0("skia", "paintSkBitmap");
#endif
SkPaint paint;
paint.setXfermodeMode(compOp);
paint.setAlpha(platformContext->getNormalizedAlpha());
paint.setLooper(platformContext->getDrawLooper());
// only antialias if we're rotated or skewed
paint.setAntiAlias(hasNon90rotation(platformContext));
SkCanvas* canvas = platformContext->canvas();
ResamplingMode resampling;
if (platformContext->isAccelerated())
resampling = RESAMPLE_LINEAR;
else if (platformContext->printing())
resampling = RESAMPLE_NONE;
else {
// Take into account scale applied to the canvas when computing sampling mode (e.g. CSS scale or page scale).
SkRect destRectTarget = destRect;
if (!(canvas->getTotalMatrix().getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
canvas->getTotalMatrix().mapRect(&destRectTarget, destRect);
resampling = computeResamplingMode(canvas->getTotalMatrix(), bitmap, srcRect.width(), srcRect.height(),
SkScalarToFloat(destRectTarget.width()), SkScalarToFloat(destRectTarget.height()));
}
if (resampling == RESAMPLE_NONE) {
// FIXME: This is to not break tests (it results in the filter bitmap flag
// being set to true). We need to decide if we respect RESAMPLE_NONE
// being returned from computeResamplingMode.
resampling = RESAMPLE_LINEAR;
}
resampling = limitResamplingMode(platformContext, resampling);
paint.setFilterBitmap(resampling == RESAMPLE_LINEAR);
if (resampling == RESAMPLE_AWESOME)
drawResampledBitmap(*canvas, paint, bitmap, srcRect, destRect);
else {
// No resampling necessary, we can just draw the bitmap. We want to
// filter it if we decided to do linear interpolation above, or if there
// is something interesting going on with the matrix (like a rotation).
// Note: for serialization, we will want to subset the bitmap first so
// we don't send extra pixels.
canvas->drawBitmapRect(bitmap.bitmap(), &srcRect, destRect, &paint);
}
platformContext->didDrawRect(destRect, paint, &bitmap.bitmap());
}
static void paintSkBitmap(PlatformContextSkia* platformContext, const NativeImageSkia& bitmap, const SkRect& srcRect, const SkRect& destRect, const SkXfermode::Mode& compOp)
{
#if PLATFORM(CHROMIUM)
TRACE_EVENT0("skia", "paintSkBitmap");
#endif
SkPaint paint;
paint.setXfermodeMode(compOp);
paint.setAlpha(platformContext->getNormalizedAlpha());
paint.setLooper(platformContext->getDrawLooper());
// only antialias if we're rotated or skewed
paint.setAntiAlias(hasNon90rotation(platformContext));
ResamplingMode resampling;
if (platformContext->isAccelerated())
resampling = RESAMPLE_LINEAR;
else if (platformContext->printing())
resampling = RESAMPLE_NONE;
else {
// Take into account scale applied to the canvas when computing sampling mode (e.g. CSS scale or page scale).
SkRect destRectTarget = destRect;
if (!(platformContext->getTotalMatrix().getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
platformContext->getTotalMatrix().mapRect(&destRectTarget, destRect);
resampling = computeResamplingMode(platformContext->getTotalMatrix(), bitmap,
SkScalarToFloat(srcRect.width()), SkScalarToFloat(srcRect.height()),
SkScalarToFloat(destRectTarget.width()), SkScalarToFloat(destRectTarget.height()));
}
if (resampling == RESAMPLE_NONE) {
// FIXME: This is to not break tests (it results in the filter bitmap flag
// being set to true). We need to decide if we respect RESAMPLE_NONE
// being returned from computeResamplingMode.
resampling = RESAMPLE_LINEAR;
}
resampling = limitResamplingMode(platformContext, resampling);
paint.setFilterBitmap(resampling == RESAMPLE_LINEAR);
if (resampling == RESAMPLE_AWESOME)
drawResampledBitmap(platformContext, paint, bitmap, srcRect, destRect);
else {
// No resampling necessary, we can just draw the bitmap. We want to
// filter it if we decided to do linear interpolation above, or if there
// is something interesting going on with the matrix (like a rotation).
// Note: for serialization, we will want to subset the bitmap first so
// we don't send extra pixels.
SkIRect enclosingSrcRect;
SkRect enclosingDestRect;
SkISize bitmapSize = SkISize::Make(bitmap.bitmap().width(), bitmap.bitmap().height());
bool needsClipping = computeBitmapDrawRects(bitmapSize, srcRect, destRect, &enclosingSrcRect, &enclosingDestRect);
if (enclosingSrcRect.isEmpty() || enclosingDestRect.isEmpty())
return;
// If destination is enlarged because source rectangle didn't align to
// integer boundaries then we draw a slightly larger rectangle and clip
// to the original destination rectangle.
// See http://crbug.com/145540.
if (needsClipping) {
platformContext->save();
platformContext->clipRect(destRect);
}
platformContext->drawBitmapRect(bitmap.bitmap(), &enclosingSrcRect, enclosingDestRect, &paint);
if (needsClipping)
platformContext->restore();
}
platformContext->didDrawRect(destRect, paint, &bitmap.bitmap());
}
void NativeImageSkia::draw(GraphicsContext* context, const SkRect& srcRect, const SkRect& destRect, PassRefPtr<SkXfermode> compOp) const
{
TRACE_EVENT0("skia", "NativeImageSkia::draw");
SkPaint paint;
paint.setXfermode(compOp.get());
paint.setColorFilter(context->colorFilter());
paint.setAlpha(context->getNormalizedAlpha());
paint.setLooper(context->drawLooper());
// only antialias if we're rotated or skewed
paint.setAntiAlias(hasNon90rotation(context));
ResamplingMode resampling;
if (context->isAccelerated()) {
resampling = LinearResampling;
} else if (context->printing()) {
resampling = NoResampling;
} else {
// Take into account scale applied to the canvas when computing sampling mode (e.g. CSS scale or page scale).
SkRect destRectTarget = destRect;
SkMatrix totalMatrix = context->getTotalMatrix();
if (!(totalMatrix.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
totalMatrix.mapRect(&destRectTarget, destRect);
resampling = computeResamplingMode(totalMatrix,
SkScalarToFloat(srcRect.width()), SkScalarToFloat(srcRect.height()),
SkScalarToFloat(destRectTarget.width()), SkScalarToFloat(destRectTarget.height()));
}
if (resampling == NoResampling) {
// FIXME: This is to not break tests (it results in the filter bitmap flag
// being set to true). We need to decide if we respect NoResampling
// being returned from computeResamplingMode.
resampling = LinearResampling;
}
resampling = limitResamplingMode(context, resampling);
paint.setFilterBitmap(resampling == LinearResampling);
bool isLazyDecoded = DeferredImageDecoder::isLazyDecoded(bitmap());
// FIXME: Bicubic filtering in Skia is only applied to defer-decoded images
// as an experiment. Once this filtering code path becomes stable we should
// turn this on for all cases, including non-defer-decoded images.
bool useBicubicFilter = resampling == AwesomeResampling && isLazyDecoded;
if (useBicubicFilter)
paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
if (resampling == AwesomeResampling && !useBicubicFilter) {
// Resample the image and then draw the result to canvas with bilinear
// filtering.
drawResampledBitmap(context, paint, srcRect, destRect);
} else {
// We want to filter it if we decided to do interpolation above, or if
// there is something interesting going on with the matrix (like a rotation).
// Note: for serialization, we will want to subset the bitmap first so we
// don't send extra pixels.
context->drawBitmapRect(bitmap(), &srcRect, destRect, &paint);
}
if (isLazyDecoded)
PlatformInstrumentation::didDrawLazyPixelRef(bitmap().getGenerationID());
context->didDrawRect(destRect, paint, &bitmap());
}