| /* | |
| * Copyright 2015 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "SkGpuDevice.h" | |
| #include "GrBlurUtils.h" | |
| #include "GrCaps.h" | |
| #include "GrDrawContext.h" | |
| #include "GrStrokeInfo.h" | |
| #include "GrTextureParamsAdjuster.h" | |
| #include "SkDraw.h" | |
| #include "SkGrPriv.h" | |
| #include "SkMaskFilter.h" | |
| #include "effects/GrBicubicEffect.h" | |
| #include "effects/GrSimpleTextureEffect.h" | |
| #include "effects/GrTextureDomain.h" | |
| static inline bool use_shader(bool textureIsAlphaOnly, const SkPaint& paint) { | |
| return textureIsAlphaOnly && paint.getShader(); | |
| } | |
| ////////////////////////////////////////////////////////////////////////////// | |
| // Helper functions for dropping src rect constraint in bilerp mode. | |
| static const SkScalar kColorBleedTolerance = 0.001f; | |
| static bool has_aligned_samples(const SkRect& srcRect, const SkRect& transformedRect) { | |
| // detect pixel disalignment | |
| if (SkScalarAbs(SkScalarRoundToScalar(transformedRect.left()) - transformedRect.left()) < kColorBleedTolerance && | |
| SkScalarAbs(SkScalarRoundToScalar(transformedRect.top()) - transformedRect.top()) < kColorBleedTolerance && | |
| SkScalarAbs(transformedRect.width() - srcRect.width()) < kColorBleedTolerance && | |
| SkScalarAbs(transformedRect.height() - srcRect.height()) < kColorBleedTolerance) { | |
| return true; | |
| } | |
| return false; | |
| } | |
| static bool may_color_bleed(const SkRect& srcRect, | |
| const SkRect& transformedRect, | |
| const SkMatrix& m, | |
| bool isMSAA) { | |
| // Only gets called if has_aligned_samples returned false. | |
| // So we can assume that sampling is axis aligned but not texel aligned. | |
| SkASSERT(!has_aligned_samples(srcRect, transformedRect)); | |
| SkRect innerSrcRect(srcRect), innerTransformedRect, outerTransformedRect(transformedRect); | |
| if (isMSAA) { | |
| innerSrcRect.inset(SK_Scalar1, SK_Scalar1); | |
| } else { | |
| innerSrcRect.inset(SK_ScalarHalf, SK_ScalarHalf); | |
| } | |
| m.mapRect(&innerTransformedRect, innerSrcRect); | |
| // The gap between outerTransformedRect and innerTransformedRect | |
| // represents the projection of the source border area, which is | |
| // problematic for color bleeding. We must check whether any | |
| // destination pixels sample the border area. | |
| outerTransformedRect.inset(kColorBleedTolerance, kColorBleedTolerance); | |
| innerTransformedRect.outset(kColorBleedTolerance, kColorBleedTolerance); | |
| SkIRect outer, inner; | |
| outerTransformedRect.round(&outer); | |
| innerTransformedRect.round(&inner); | |
| // If the inner and outer rects round to the same result, it means the | |
| // border does not overlap any pixel centers. Yay! | |
| return inner != outer; | |
| } | |
| static bool can_ignore_bilerp_constraint(const GrTextureProducer& producer, | |
| const SkRect& srcRect, | |
| const SkMatrix& srcRectToDeviceSpace, | |
| bool isMSAA) { | |
| if (srcRectToDeviceSpace.rectStaysRect()) { | |
| // sampling is axis-aligned | |
| SkRect transformedRect; | |
| srcRectToDeviceSpace.mapRect(&transformedRect, srcRect); | |
| if (has_aligned_samples(srcRect, transformedRect) || | |
| !may_color_bleed(srcRect, transformedRect, srcRectToDeviceSpace, isMSAA)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| } | |
| ////////////////////////////////////////////////////////////////////////////// | |
| void SkGpuDevice::drawTextureProducer(GrTextureProducer* producer, | |
| const SkRect* srcRect, | |
| const SkRect* dstRect, | |
| SkCanvas::SrcRectConstraint constraint, | |
| const SkMatrix& viewMatrix, | |
| const GrClip& clip, | |
| const SkPaint& paint) { | |
| // This is the funnel for all non-tiled bitmap/image draw calls. Log a histogram entry. | |
| SK_HISTOGRAM_BOOLEAN("DrawTiled", false); | |
| // Figure out the actual dst and src rect by clipping the src rect to the bounds of the | |
| // adjuster. If the src rect is clipped then the dst rect must be recomputed. Also determine | |
| // the matrix that maps the src rect to the dst rect. | |
| SkRect clippedSrcRect; | |
| SkRect clippedDstRect; | |
| const SkRect srcBounds = SkRect::MakeIWH(producer->width(), producer->height()); | |
| SkMatrix srcToDstMatrix; | |
| if (srcRect) { | |
| if (!dstRect) { | |
| dstRect = &srcBounds; | |
| } | |
| if (!srcBounds.contains(*srcRect)) { | |
| clippedSrcRect = *srcRect; | |
| if (!clippedSrcRect.intersect(srcBounds)) { | |
| return; | |
| } | |
| if (!srcToDstMatrix.setRectToRect(*srcRect, *dstRect, SkMatrix::kFill_ScaleToFit)) { | |
| return; | |
| } | |
| srcToDstMatrix.mapRect(&clippedDstRect, clippedSrcRect); | |
| } else { | |
| clippedSrcRect = *srcRect; | |
| clippedDstRect = *dstRect; | |
| if (!srcToDstMatrix.setRectToRect(*srcRect, *dstRect, SkMatrix::kFill_ScaleToFit)) { | |
| return; | |
| } | |
| } | |
| } else { | |
| clippedSrcRect = srcBounds; | |
| if (dstRect) { | |
| clippedDstRect = *dstRect; | |
| if (!srcToDstMatrix.setRectToRect(srcBounds, *dstRect, SkMatrix::kFill_ScaleToFit)) { | |
| return; | |
| } | |
| } else { | |
| clippedDstRect = srcBounds; | |
| srcToDstMatrix.reset(); | |
| } | |
| } | |
| this->drawTextureProducerImpl(producer, clippedSrcRect, clippedDstRect, constraint, viewMatrix, | |
| srcToDstMatrix, clip, paint); | |
| } | |
| void SkGpuDevice::drawTextureProducerImpl(GrTextureProducer* producer, | |
| const SkRect& clippedSrcRect, | |
| const SkRect& clippedDstRect, | |
| SkCanvas::SrcRectConstraint constraint, | |
| const SkMatrix& viewMatrix, | |
| const SkMatrix& srcToDstMatrix, | |
| const GrClip& clip, | |
| const SkPaint& paint) { | |
| // Specifying the texture coords as local coordinates is an attempt to enable more batching | |
| // by not baking anything about the srcRect, dstRect, or viewMatrix, into the texture FP. In | |
| // the future this should be an opaque optimization enabled by the combination of batch/GP and | |
| // FP. | |
| const SkMaskFilter* mf = paint.getMaskFilter(); | |
| // The shader expects proper local coords, so we can't replace local coords with texture coords | |
| // if the shader will be used. If we have a mask filter we will change the underlying geometry | |
| // that is rendered. | |
| bool canUseTextureCoordsAsLocalCoords = !use_shader(producer->isAlphaOnly(), paint) && !mf; | |
| bool doBicubic; | |
| GrTextureParams::FilterMode fm = | |
| GrSkFilterQualityToGrFilterMode(paint.getFilterQuality(), viewMatrix, srcToDstMatrix, | |
| &doBicubic); | |
| const GrTextureParams::FilterMode* filterMode = doBicubic ? nullptr : &fm; | |
| GrTextureAdjuster::FilterConstraint constraintMode; | |
| if (SkCanvas::kFast_SrcRectConstraint == constraint) { | |
| constraintMode = GrTextureAdjuster::kNo_FilterConstraint; | |
| } else { | |
| constraintMode = GrTextureAdjuster::kYes_FilterConstraint; | |
| } | |
| // If we have to outset for AA then we will generate texture coords outside the src rect. The | |
| // same happens for any mask filter that extends the bounds rendered in the dst. | |
| // This is conservative as a mask filter does not have to expand the bounds rendered. | |
| bool coordsAllInsideSrcRect = !paint.isAntiAlias() && !mf; | |
| // Check for optimization to drop the src rect constraint when on bilerp. | |
| if (filterMode && GrTextureParams::kBilerp_FilterMode == *filterMode && | |
| GrTextureAdjuster::kYes_FilterConstraint == constraintMode && coordsAllInsideSrcRect) { | |
| SkMatrix combinedMatrix; | |
| combinedMatrix.setConcat(viewMatrix, srcToDstMatrix); | |
| if (can_ignore_bilerp_constraint(*producer, clippedSrcRect, combinedMatrix, | |
| fRenderTarget->isUnifiedMultisampled())) { | |
| constraintMode = GrTextureAdjuster::kNo_FilterConstraint; | |
| } | |
| } | |
| const SkMatrix* textureMatrix; | |
| SkMatrix tempMatrix; | |
| if (canUseTextureCoordsAsLocalCoords) { | |
| textureMatrix = &SkMatrix::I(); | |
| } else { | |
| if (!srcToDstMatrix.invert(&tempMatrix)) { | |
| return; | |
| } | |
| textureMatrix = &tempMatrix; | |
| } | |
| SkAutoTUnref<const GrFragmentProcessor> fp(producer->createFragmentProcessor( | |
| *textureMatrix, clippedSrcRect, constraintMode, coordsAllInsideSrcRect, filterMode)); | |
| if (!fp) { | |
| return; | |
| } | |
| GrPaint grPaint; | |
| if (!SkPaintToGrPaintWithTexture(fContext, paint, viewMatrix, fp, producer->isAlphaOnly(), | |
| &grPaint)) { | |
| return; | |
| } | |
| if (canUseTextureCoordsAsLocalCoords) { | |
| fDrawContext->fillRectToRect(clip, grPaint, viewMatrix, clippedDstRect, clippedSrcRect); | |
| return; | |
| } | |
| if (!mf) { | |
| fDrawContext->drawRect(clip, grPaint, viewMatrix, clippedDstRect); | |
| return; | |
| } | |
| // First see if we can do the draw + mask filter direct to the dst. | |
| SkStrokeRec rec(SkStrokeRec::kFill_InitStyle); | |
| SkRRect rrect; | |
| rrect.setRect(clippedDstRect); | |
| if (mf->directFilterRRectMaskGPU(fContext->textureProvider(), | |
| fDrawContext, | |
| &grPaint, | |
| clip, | |
| viewMatrix, | |
| rec, | |
| rrect)) { | |
| return; | |
| } | |
| SkPath rectPath; | |
| rectPath.addRect(clippedDstRect); | |
| rectPath.setIsVolatile(true); | |
| GrBlurUtils::drawPathWithMaskFilter(this->context(), fDrawContext, fClip, | |
| rectPath, &grPaint, viewMatrix, mf, paint.getPathEffect(), | |
| GrStrokeInfo::FillInfo(), true); | |
| } |