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Make SkGpuBlurUtils::GaussianBlur more drawContext centric

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This is split out of https://codereview.chromium.org/1959493002/ (Retract GrRenderTarget from SkGpuBlurUtils)

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1962903003

Review-Url: https://codereview.chromium.org/1962903003
This commit is contained in:
robertphillips 2016-05-11 07:55:35 -07:00 committed by Commit bot
parent fe4d5d3af5
commit e7ef01dcfd
4 changed files with 73 additions and 124 deletions
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19
src/effects/SkBlurImageFilter.cpp
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@ -121,20 +121,21 @@ sk_sp<SkSpecialImage> SkBlurImageFilter::onFilterImage(SkSpecialImage* source,
inputBounds.offset(-inputOffset);
dstBounds.offset(-inputOffset);
SkRect inputBoundsF(SkRect::Make(inputBounds));
sk_sp<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(context,
inputTexture.get(),
source->props().isGammaCorrect(),
SkRect::Make(dstBounds),
&inputBoundsF,
sigma.x(),
sigma.y()));
if (!tex) {
sk_sp<GrDrawContext> drawContext(SkGpuBlurUtils::GaussianBlur(
context,
inputTexture.get(),
source->props().isGammaCorrect(),
SkRect::Make(dstBounds),
&inputBoundsF,
sigma.x(),
sigma.y()));
if (!drawContext) {
return nullptr;
}
return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(dstBounds.width(), dstBounds.height()),
kNeedNewImageUniqueID_SpecialImage,
std::move(tex), &source->props());
drawContext->asTexture(), &source->props());
}
#endif

16
src/effects/SkBlurMaskFilter.cpp
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@ -1248,10 +1248,11 @@ bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src,
// If we're doing a normal blur, we can clobber the pathTexture in the
// gaussianBlur. Otherwise, we need to save it for later compositing.
bool isNormalBlur = (kNormal_SkBlurStyle == fBlurStyle);
*result = SkGpuBlurUtils::GaussianBlur(context, src, isNormalBlur && canOverwriteSrc,
clipRect, nullptr,
xformedSigma, xformedSigma);
if (nullptr == *result) {
sk_sp<GrDrawContext> drawContext(SkGpuBlurUtils::GaussianBlur(context, src,
isNormalBlur && canOverwriteSrc,
clipRect, nullptr,
xformedSigma, xformedSigma));
if (!drawContext) {
return false;
}
@ -1276,15 +1277,10 @@ bool SkBlurMaskFilterImpl::filterMaskGPU(GrTexture* src,
paint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op);
}
sk_sp<GrDrawContext> drawContext(
context->drawContext(sk_ref_sp((*result)->asRenderTarget())));
if (!drawContext) {
return false;
}
drawContext->drawRect(GrClip::WideOpen(), paint, SkMatrix::I(), clipRect);
}
*result = drawContext->asTexture().release();
return true;
}

132
src/effects/SkGpuBlurUtils.cpp
View File

@ -163,13 +163,13 @@ static void convolve_gaussian(GrDrawContext* drawContext,
}
}
GrTexture* GaussianBlur(GrContext* context,
GrTexture* srcTexture,
bool gammaCorrect,
const SkRect& dstBounds,
const SkRect* srcBounds,
float sigmaX,
float sigmaY) {
sk_sp<GrDrawContext> GaussianBlur(GrContext* context,
GrTexture* srcTexture,
bool gammaCorrect,
const SkRect& dstBounds,
const SkRect* srcBounds,
float sigmaX,
float sigmaY) {
SkASSERT(context);
SkIRect clearRect;
int scaleFactorX, radiusX;
@ -211,6 +211,14 @@ GrTexture* GaussianBlur(GrContext* context,
const SkSurfaceProps props(gammaCorrect ? SkSurfaceProps::kGammaCorrect_Flag : 0,
SkSurfaceProps::kLegacyFontHost_InitType);
sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(SkBackingFit::kApprox,
width, height, config,
0, kDefault_GrSurfaceOrigin,
&props));
if (!dstDrawContext) {
return nullptr;
}
// For really small blurs (certainly no wider than 5x5 on desktop gpus) it is faster to just
// launch a single non separable kernel vs two launches
if (sigmaX > 0.0f && sigmaY > 0.0f &&
@ -218,35 +226,17 @@ GrTexture* GaussianBlur(GrContext* context,
// We shouldn't be scaling because this is a small size blur
SkASSERT((1 == scaleFactorX) && (1 == scaleFactorY));
sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(SkBackingFit::kApprox,
width, height, config,
0, kDefault_GrSurfaceOrigin,
&props));
if (!dstDrawContext) {
return nullptr;
}
convolve_gaussian_2d(dstDrawContext.get(), clip, localDstBounds, srcOffset,
srcTexture, radiusX, radiusY, sigmaX, sigmaY, srcBounds);
return dstDrawContext->asTexture().release();
return dstDrawContext;
}
GrSurfaceDesc desc;
desc.fFlags = kRenderTarget_GrSurfaceFlag;
desc.fWidth = width;
desc.fHeight = height;
desc.fConfig = config;
GrTexture* dstTexture;
GrTexture* tempTexture;
SkAutoTUnref<GrTexture> temp1, temp2;
temp1.reset(context->textureProvider()->createApproxTexture(desc));
dstTexture = temp1.get();
temp2.reset(context->textureProvider()->createApproxTexture(desc));
tempTexture = temp2.get();
if (!dstTexture || !tempTexture) {
sk_sp<GrDrawContext> tmpDrawContext(context->newDrawContext(SkBackingFit::kApprox,
width, height, config,
0, kDefault_GrSurfaceOrigin,
&props));
if (!tmpDrawContext) {
return nullptr;
}
@ -280,17 +270,12 @@ GrTexture* GaussianBlur(GrContext* context,
scale_rect(&dstRect, i < scaleFactorX ? 0.5f : 1.0f,
i < scaleFactorY ? 0.5f : 1.0f);
sk_sp<GrDrawContext> dstDrawContext(
context->drawContext(sk_ref_sp(dstTexture->asRenderTarget())));
if (!dstDrawContext) {
return nullptr;
}
dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcRect);
srcDrawContext.swap(dstDrawContext);
srcDrawContext = dstDrawContext;
srcRect = dstRect;
srcTexture = dstTexture;
SkTSwap(dstTexture, tempTexture);
srcTexture = srcDrawContext->asTexture().release();
SkTSwap(dstDrawContext, tmpDrawContext);
localSrcBounds = srcRect;
}
@ -301,13 +286,7 @@ GrTexture* GaussianBlur(GrContext* context,
SkIRect srcIRect = srcRect.roundOut();
if (sigmaX > 0.0f) {
if (scaleFactorX > 1) {
// TODO: if we pass in the source draw context we don't need this here
if (!srcDrawContext) {
srcDrawContext = context->drawContext(sk_ref_sp(srcTexture->asRenderTarget()));
if (!srcDrawContext) {
return nullptr;
}
}
SkASSERT(srcDrawContext);
// Clear out a radius to the right of the srcRect to prevent the
// X convolution from reading garbage.
@ -316,31 +295,20 @@ GrTexture* GaussianBlur(GrContext* context,
srcDrawContext->clear(&clearRect, 0x0, false);
}
sk_sp<GrDrawContext> dstDrawContext(
context->drawContext(sk_ref_sp(dstTexture->asRenderTarget()), &props));
if (!dstDrawContext) {
return nullptr;
}
convolve_gaussian(dstDrawContext.get(), clip, srcRect,
srcTexture, Gr1DKernelEffect::kX_Direction, radiusX, sigmaX,
srcBounds, srcOffset);
srcDrawContext.swap(dstDrawContext);
srcTexture = dstTexture;
srcDrawContext = dstDrawContext;
srcTexture = srcDrawContext->asTexture().release();
srcRect.offsetTo(0, 0);
SkTSwap(dstTexture, tempTexture);
SkTSwap(dstDrawContext, tmpDrawContext);
localSrcBounds = srcRect;
srcOffset.set(0, 0);
}
if (sigmaY > 0.0f) {
if (scaleFactorY > 1 || sigmaX > 0.0f) {
// TODO: if we pass in the source draw context we don't need this here
if (!srcDrawContext) {
srcDrawContext = context->drawContext(sk_ref_sp(srcTexture->asRenderTarget()));
if (!srcDrawContext) {
return nullptr;
}
}
SkASSERT(srcDrawContext);
// Clear out a radius below the srcRect to prevent the Y
// convolution from reading garbage.
@ -349,61 +317,47 @@ GrTexture* GaussianBlur(GrContext* context,
srcDrawContext->clear(&clearRect, 0x0, false);
}
sk_sp<GrDrawContext> dstDrawContext(
context->drawContext(sk_ref_sp(dstTexture->asRenderTarget()), &props));
if (!dstDrawContext) {
return nullptr;
}
convolve_gaussian(dstDrawContext.get(), clip, srcRect,
srcTexture, Gr1DKernelEffect::kY_Direction, radiusY, sigmaY,
srcBounds, srcOffset);
srcDrawContext.swap(dstDrawContext);
srcTexture = dstTexture;
srcDrawContext = dstDrawContext;
srcRect.offsetTo(0, 0);
SkTSwap(dstTexture, tempTexture);
SkTSwap(dstDrawContext, tmpDrawContext);
}
SkASSERT(srcDrawContext);
srcTexture = nullptr; // we don't use this from here on out
srcIRect = srcRect.roundOut();
if (scaleFactorX > 1 || scaleFactorY > 1) {
SkASSERT(srcDrawContext);
// Clear one pixel to the right and below, to accommodate bilinear upsampling.
clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom, srcIRect.width() + 1, 1);
srcDrawContext->clear(&clearRect, 0x0, false);
clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop, 1, srcIRect.height());
srcDrawContext->clear(&clearRect, 0x0, false);
// Clear one pixel to the right and below, to accommodate bilinear
// upsampling.
clearRect = SkIRect::MakeXYWH(srcIRect.fLeft, srcIRect.fBottom,
srcIRect.width() + 1, 1);
srcDrawContext->clear(&clearRect, 0x0, false);
clearRect = SkIRect::MakeXYWH(srcIRect.fRight, srcIRect.fTop,
1, srcIRect.height());
srcDrawContext->clear(&clearRect, 0x0, false);
SkMatrix matrix;
matrix.setIDiv(srcTexture->width(), srcTexture->height());
matrix.setIDiv(srcDrawContext->width(), srcDrawContext->height());
GrPaint paint;
paint.setGammaCorrect(gammaCorrect);
// FIXME: this should be mitchell, not bilinear.
GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
paint.addColorTextureProcessor(srcTexture, matrix, params);
paint.addColorTextureProcessor(srcDrawContext->asTexture().release(), matrix, params);
paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
SkRect dstRect(srcRect);
scale_rect(&dstRect, (float) scaleFactorX, (float) scaleFactorY);
sk_sp<GrDrawContext> dstDrawContext(
context->drawContext(sk_ref_sp(dstTexture->asRenderTarget())));
if (!dstDrawContext) {
return nullptr;
}
dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcRect);
srcDrawContext.swap(dstDrawContext);
srcDrawContext = dstDrawContext;
srcRect = dstRect;
srcTexture = dstTexture;
SkTSwap(dstTexture, tempTexture);
SkTSwap(dstDrawContext, tmpDrawContext);
}
return SkRef(srcTexture);
return srcDrawContext;
}
#endif

30
src/effects/SkGpuBlurUtils.h
View File

@ -9,19 +9,18 @@
#define SkGpuBlurUtils_DEFINED
#if SK_SUPPORT_GPU
#include "GrTextureProvider.h"
#include "GrDrawContext.h"
class GrTexture;
class GrContext;
#endif
class GrTexture;
struct SkRect;
namespace SkGpuBlurUtils {
#if SK_SUPPORT_GPU
/**
* Applies a 2D Gaussian blur to a given texture.
* Applies a 2D Gaussian blur to a given texture. The blurred result is returned
* as a drawContext in case the caller wishes to future draw into the result.
* Note: one of sigmaX and sigmaY should be non-zero!
* @param context The GPU context
* @param srcTexture The source texture to be blurred.
* @param gammaCorrect Should blur be gamma-correct (sRGB to linear, etc...)
@ -30,18 +29,17 @@ namespace SkGpuBlurUtils {
* no pixels will be sampled outside of this rectangle.
* @param sigmaX The blur's standard deviation in X.
* @param sigmaY The blur's standard deviation in Y.
* @return the blurred texture, which may be srcTexture reffed, or a
* new texture. It is the caller's responsibility to unref this texture.
* @return The drawContext containing the blurred result.
*/
GrTexture* GaussianBlur(GrContext* context,
GrTexture* srcTexture,
bool gammaCorrect,
const SkRect& dstBounds,
const SkRect* srcBounds,
float sigmaX,
float sigmaY);
#endif
sk_sp<GrDrawContext> GaussianBlur(GrContext* context,
GrTexture* srcTexture,
bool gammaCorrect,
const SkRect& dstBounds,
const SkRect* srcBounds,
float sigmaX,
float sigmaY);
};
#endif
#endif