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)
{
SkPaint paint;
paint.setXfermodeMode(compOp);
paint.setFilterBitmap(true);
int alpha = roundf(platformContext->getAlpha() * 256);
if (alpha > 255)
alpha = 255;
else if (alpha < 0)
alpha = 0;
paint.setAlpha(alpha);
skia::PlatformCanvas* canvas = platformContext->canvas();
ResamplingMode resampling = platformContext->isPrinting() ? RESAMPLE_NONE :
computeResamplingMode(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, &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());
}
void Image::drawPattern(GraphicsContext* context,
const FloatRect& floatSrcRect,
const AffineTransform& patternTransform,
const FloatPoint& phase,
ColorSpace styleColorSpace,
CompositeOperator compositeOp,
const FloatRect& destRect)
{
#if PLATFORM(CHROMIUM)
TRACE_EVENT0("skia", "Image::drawPattern");
#endif
FloatRect normSrcRect = normalizeRect(floatSrcRect);
if (destRect.isEmpty() || normSrcRect.isEmpty())
return; // nothing to draw
NativeImageSkia* bitmap = nativeImageForCurrentFrame();
if (!bitmap)
return;
SkMatrix ctm = context->platformContext()->canvas()->getTotalMatrix();
SkMatrix totalMatrix;
totalMatrix.setConcat(ctm, patternTransform);
// Figure out what size the bitmap will be in the destination. The
// destination rect is the bounds of the pattern, we need to use the
// matrix to see how big it will be.
SkRect destRectTarget;
totalMatrix.mapRect(&destRectTarget, normSrcRect);
float destBitmapWidth = SkScalarToFloat(destRectTarget.width());
float destBitmapHeight = SkScalarToFloat(destRectTarget.height());
// Compute the resampling mode.
ResamplingMode resampling;
if (context->platformContext()->isAccelerated() || context->platformContext()->printing())
resampling = RESAMPLE_LINEAR;
else
resampling = computeResamplingMode(totalMatrix, *bitmap, normSrcRect.width(), normSrcRect.height(), destBitmapWidth, destBitmapHeight);
resampling = limitResamplingMode(context->platformContext(), resampling);
// Load the transform WebKit requested.
SkMatrix matrix(patternTransform);
SkShader* shader;
if (resampling == RESAMPLE_AWESOME) {
// Do nice resampling.
float scaleX = destBitmapWidth / normSrcRect.width();
float scaleY = destBitmapHeight / normSrcRect.height();
SkRect scaledSrcRect;
SkIRect enclosingScaledSrcRect;
// The image fragment generated here is not exactly what is
// requested. The scale factor used is approximated and image
// fragment is slightly larger to align to integer
// boundaries.
SkBitmap resampled = extractScaledImageFragment(*bitmap, normSrcRect, scaleX, scaleY, &scaledSrcRect, &enclosingScaledSrcRect);
shader = SkShader::CreateBitmapShader(resampled, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
// Since we just resized the bitmap, we need to remove the scale
// applied to the pixels in the bitmap shader. This means we need
// CTM * patternTransform to have identity scale. Since we
// can't modify CTM (or the rectangle will be drawn in the wrong
// place), we must set patternTransform's scale to the inverse of
// CTM scale.
matrix.setScaleX(ctm.getScaleX() ? 1 / ctm.getScaleX() : 1);
matrix.setScaleY(ctm.getScaleY() ? 1 / ctm.getScaleY() : 1);
} else {
// No need to do nice resampling.
SkBitmap srcSubset;
bitmap->bitmap().extractSubset(&srcSubset, enclosingIntRect(normSrcRect));
shader = SkShader::CreateBitmapShader(srcSubset, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
}
// We also need to translate it such that the origin of the pattern is the
// origin of the destination rect, which is what WebKit expects. Skia uses
// the coordinate system origin as the base for the patter. If WebKit wants
// a shifted image, it will shift it from there using the patternTransform.
float adjustedX = phase.x() + normSrcRect.x() *
narrowPrecisionToFloat(patternTransform.a());
float adjustedY = phase.y() + normSrcRect.y() *
narrowPrecisionToFloat(patternTransform.d());
matrix.postTranslate(SkFloatToScalar(adjustedX),
SkFloatToScalar(adjustedY));
shader->setLocalMatrix(matrix);
SkPaint paint;
paint.setShader(shader)->unref();
paint.setXfermodeMode(WebCoreCompositeToSkiaComposite(compositeOp));
paint.setFilterBitmap(resampling == RESAMPLE_LINEAR);
context->platformContext()->paintSkPaint(destRect, paint);
}
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 Image::drawPattern(GraphicsContext* context,
const FloatRect& floatSrcRect,
const AffineTransform& patternTransform,
const FloatPoint& phase,
ColorSpace styleColorSpace,
CompositeOperator compositeOp,
const FloatRect& destRect)
{
FloatRect normSrcRect = normalizeRect(floatSrcRect);
if (destRect.isEmpty() || normSrcRect.isEmpty())
return; // nothing to draw
NativeImageSkia* bitmap = nativeImageForCurrentFrame();
if (!bitmap)
return;
SkIRect srcRect = enclosingIntRect(normSrcRect);
// Figure out what size the bitmap will be in the destination. The
// destination rect is the bounds of the pattern, we need to use the
// matrix to see how big it will be.
float destBitmapWidth, destBitmapHeight;
TransformDimensions(patternTransform, srcRect.width(), srcRect.height(),
&destBitmapWidth, &destBitmapHeight);
// Compute the resampling mode.
ResamplingMode resampling;
if (context->platformContext()->isAccelerated() || context->platformContext()->printing())
resampling = RESAMPLE_LINEAR;
else
resampling = computeResamplingMode(context->platformContext(), *bitmap, srcRect.width(), srcRect.height(), destBitmapWidth, destBitmapHeight);
// Load the transform WebKit requested.
SkMatrix matrix(patternTransform);
SkShader* shader;
if (resampling == RESAMPLE_AWESOME) {
// Do nice resampling.
int width = static_cast<int>(destBitmapWidth);
int height = static_cast<int>(destBitmapHeight);
SkBitmap resampled = bitmap->resizedBitmap(srcRect, width, height);
shader = SkShader::CreateBitmapShader(resampled, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
// Since we just resized the bitmap, we need to undo the scale set in
// the image transform.
matrix.setScaleX(SkIntToScalar(1));
matrix.setScaleY(SkIntToScalar(1));
} else {
// No need to do nice resampling.
SkBitmap srcSubset;
bitmap->bitmap().extractSubset(&srcSubset, srcRect);
shader = SkShader::CreateBitmapShader(srcSubset, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
}
// We also need to translate it such that the origin of the pattern is the
// origin of the destination rect, which is what WebKit expects. Skia uses
// the coordinate system origin as the base for the patter. If WebKit wants
// a shifted image, it will shift it from there using the patternTransform.
float adjustedX = phase.x() + normSrcRect.x() *
narrowPrecisionToFloat(patternTransform.a());
float adjustedY = phase.y() + normSrcRect.y() *
narrowPrecisionToFloat(patternTransform.d());
matrix.postTranslate(SkFloatToScalar(adjustedX),
SkFloatToScalar(adjustedY));
shader->setLocalMatrix(matrix);
SkPaint paint;
paint.setShader(shader)->unref();
paint.setXfermodeMode(WebCoreCompositeToSkiaComposite(compositeOp));
paint.setFilterBitmap(resampling == RESAMPLE_LINEAR);
context->platformContext()->paintSkPaint(destRect, paint);
}
void NativeImageSkia::drawPattern(
GraphicsContext* context,
const FloatRect& floatSrcRect,
const FloatSize& scale,
const FloatPoint& phase,
CompositeOperator compositeOp,
const FloatRect& destRect,
blink::WebBlendMode blendMode,
const IntSize& repeatSpacing) const
{
FloatRect normSrcRect = floatSrcRect;
normSrcRect.intersect(FloatRect(0, 0, bitmap().width(), bitmap().height()));
if (destRect.isEmpty() || normSrcRect.isEmpty())
return; // nothing to draw
SkMatrix totalMatrix = context->getTotalMatrix();
SkScalar ctmScaleX = totalMatrix.getScaleX();
SkScalar ctmScaleY = totalMatrix.getScaleY();
totalMatrix.preScale(scale.width(), scale.height());
// Figure out what size the bitmap will be in the destination. The
// destination rect is the bounds of the pattern, we need to use the
// matrix to see how big it will be.
SkRect destRectTarget;
totalMatrix.mapRect(&destRectTarget, normSrcRect);
float destBitmapWidth = SkScalarToFloat(destRectTarget.width());
float destBitmapHeight = SkScalarToFloat(destRectTarget.height());
// Compute the resampling mode.
ResamplingMode resampling;
if (context->isAccelerated() || context->printing())
resampling = LinearResampling;
else
resampling = computeResamplingMode(totalMatrix, normSrcRect.width(), normSrcRect.height(), destBitmapWidth, destBitmapHeight);
resampling = limitResamplingMode(context, resampling);
SkMatrix shaderTransform;
RefPtr<SkShader> shader;
bool isLazyDecoded = DeferredImageDecoder::isLazyDecoded(bitmap());
// Bicubic filter is only applied to defer-decoded images, see
// NativeImageSkia::draw for details.
bool useBicubicFilter = resampling == AwesomeResampling && isLazyDecoded;
if (resampling == AwesomeResampling && !useBicubicFilter) {
// Do nice resampling.
float scaleX = destBitmapWidth / normSrcRect.width();
float scaleY = destBitmapHeight / normSrcRect.height();
SkRect scaledSrcRect;
// The image fragment generated here is not exactly what is
// requested. The scale factor used is approximated and image
// fragment is slightly larger to align to integer
// boundaries.
SkBitmap resampled = extractScaledImageFragment(normSrcRect, scaleX, scaleY, &scaledSrcRect);
if (repeatSpacing.isZero()) {
shader = adoptRef(SkShader::CreateBitmapShader(resampled, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
} else {
shader = adoptRef(SkShader::CreateBitmapShader(
createBitmapWithSpace(resampled, repeatSpacing.width() * ctmScaleX, repeatSpacing.height() * ctmScaleY),
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
}
// Since we just resized the bitmap, we need to remove the scale
// applied to the pixels in the bitmap shader. This means we need
// CTM * shaderTransform to have identity scale. Since we
// can't modify CTM (or the rectangle will be drawn in the wrong
// place), we must set shaderTransform's scale to the inverse of
// CTM scale.
shaderTransform.setScale(ctmScaleX ? 1 / ctmScaleX : 1, ctmScaleY ? 1 / ctmScaleY : 1);
} else {
// No need to resample before drawing.
SkBitmap srcSubset;
bitmap().extractSubset(&srcSubset, enclosingIntRect(normSrcRect));
if (repeatSpacing.isZero()) {
shader = adoptRef(SkShader::CreateBitmapShader(srcSubset, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
} else {
shader = adoptRef(SkShader::CreateBitmapShader(
createBitmapWithSpace(srcSubset, repeatSpacing.width() * ctmScaleX, repeatSpacing.height() * ctmScaleY),
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
}
// Because no resizing occurred, the shader transform should be
// set to the pattern's transform, which just includes scale.
shaderTransform.setScale(scale.width(), scale.height());
}
// We also need to translate it such that the origin of the pattern is the
// origin of the destination rect, which is what WebKit expects. Skia uses
// the coordinate system origin as the base for the pattern. If WebKit wants
// a shifted image, it will shift it from there using the shaderTransform.
float adjustedX = phase.x() + normSrcRect.x() * scale.width();
float adjustedY = phase.y() + normSrcRect.y() * scale.height();
shaderTransform.postTranslate(SkFloatToScalar(adjustedX), SkFloatToScalar(adjustedY));
shader->setLocalMatrix(shaderTransform);
SkPaint paint;
paint.setShader(shader.get());
paint.setXfermode(WebCoreCompositeToSkiaComposite(compositeOp, blendMode).get());
paint.setColorFilter(context->colorFilter());
paint.setFilterBitmap(resampling == LinearResampling);
if (useBicubicFilter)
paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
if (isLazyDecoded)
PlatformInstrumentation::didDrawLazyPixelRef(bitmap().getGenerationID());
context->drawRect(destRect, paint);
}
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());
}