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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrSoftwarePathRenderer.h"
#include "GrAuditTrail.h"
#include "GrClip.h"
#include "GrPipelineBuilder.h"
#include "GrGpuResourcePriv.h"
#include "GrSWMaskHelper.h"
#include "GrTextureProvider.h"
#include "batches/GrRectBatchFactory.h"
////////////////////////////////////////////////////////////////////////////////
bool GrSoftwarePathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const {
// Pass on any style that applies. The caller will apply the style if a suitable renderer is
// not found and try again with the new GrShape.
return !args.fShape->style().applies() && SkToBool(fTexProvider);
}
////////////////////////////////////////////////////////////////////////////////
static bool get_unclipped_shape_dev_bounds(const GrShape& shape, const SkMatrix& matrix,
SkIRect* devBounds) {
SkRect shapeBounds = shape.styledBounds();
if (shapeBounds.isEmpty()) {
return false;
}
SkRect shapeDevBounds;
matrix.mapRect(&shapeDevBounds, shapeBounds);
shapeDevBounds.roundOut(devBounds);
return true;
}
// Gets the shape bounds, the clip bounds, and the intersection (if any). Returns false if there
// is no intersection.
static bool get_shape_and_clip_bounds(int width, int height,
const GrClip& clip,
const GrShape& shape,
const SkMatrix& matrix,
SkIRect* unclippedDevShapeBounds,
SkIRect* clippedDevShapeBounds,
SkIRect* devClipBounds) {
// compute bounds as intersection of rt size, clip, and path
clip.getConservativeBounds(width, height, devClipBounds);
if (!get_unclipped_shape_dev_bounds(shape, matrix, unclippedDevShapeBounds)) {
*unclippedDevShapeBounds = SkIRect::EmptyIRect();
*clippedDevShapeBounds = SkIRect::EmptyIRect();
return false;
}
if (!clippedDevShapeBounds->intersect(*devClipBounds, *unclippedDevShapeBounds)) {
*clippedDevShapeBounds = SkIRect::EmptyIRect();
return false;
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
void GrSoftwarePathRenderer::DrawNonAARect(GrDrawContext* drawContext,
const GrPaint& paint,
const GrUserStencilSettings& userStencilSettings,
const GrClip& clip,
const SkMatrix& viewMatrix,
const SkRect& rect,
const SkMatrix& localMatrix) {
SkAutoTUnref<GrDrawBatch> batch(GrRectBatchFactory::CreateNonAAFill(paint.getColor(),
viewMatrix, rect,
nullptr, &localMatrix));
GrPipelineBuilder pipelineBuilder(paint, drawContext->mustUseHWAA(paint));
pipelineBuilder.setUserStencil(&userStencilSettings);
drawContext->drawBatch(pipelineBuilder, clip, batch);
}
void GrSoftwarePathRenderer::DrawAroundInvPath(GrDrawContext* drawContext,
const GrPaint& paint,
const GrUserStencilSettings& userStencilSettings,
const GrClip& clip,
const SkMatrix& viewMatrix,
const SkIRect& devClipBounds,
const SkIRect& devPathBounds) {
SkMatrix invert;
if (!viewMatrix.invert(&invert)) {
return;
}
SkRect rect;
if (devClipBounds.fTop < devPathBounds.fTop) {
rect.iset(devClipBounds.fLeft, devClipBounds.fTop,
devClipBounds.fRight, devPathBounds.fTop);
DrawNonAARect(drawContext, paint, userStencilSettings, clip,
SkMatrix::I(), rect, invert);
}
if (devClipBounds.fLeft < devPathBounds.fLeft) {
rect.iset(devClipBounds.fLeft, devPathBounds.fTop,
devPathBounds.fLeft, devPathBounds.fBottom);
DrawNonAARect(drawContext, paint, userStencilSettings, clip,
SkMatrix::I(), rect, invert);
}
if (devClipBounds.fRight > devPathBounds.fRight) {
rect.iset(devPathBounds.fRight, devPathBounds.fTop,
devClipBounds.fRight, devPathBounds.fBottom);
DrawNonAARect(drawContext, paint, userStencilSettings, clip,
SkMatrix::I(), rect, invert);
}
if (devClipBounds.fBottom > devPathBounds.fBottom) {
rect.iset(devClipBounds.fLeft, devPathBounds.fBottom,
devClipBounds.fRight, devClipBounds.fBottom);
DrawNonAARect(drawContext, paint, userStencilSettings, clip,
SkMatrix::I(), rect, invert);
}
}
////////////////////////////////////////////////////////////////////////////////
// return true on success; false on failure
bool GrSoftwarePathRenderer::onDrawPath(const DrawPathArgs& args) {
GR_AUDIT_TRAIL_AUTO_FRAME(args.fDrawContext->auditTrail(),
"GrSoftwarePathRenderer::onDrawPath");
if (!fTexProvider) {
return false;
}
// We really need to know if the shape will be inverse filled or not
bool inverseFilled = false;
SkTLazy<GrShape> tmpShape;
SkASSERT(!args.fShape->style().applies());
inverseFilled = args.fShape->inverseFilled();
SkIRect unclippedDevShapeBounds, clippedDevShapeBounds, devClipBounds;
// To prevent overloading the cache with entries during animations we limit the cache of masks
// to cases where the matrix preserves axis alignment.
bool useCache = fAllowCaching && !inverseFilled && args.fViewMatrix->preservesAxisAlignment() &&
args.fShape->hasUnstyledKey() && args.fAntiAlias;
if (!get_shape_and_clip_bounds(args.fDrawContext->width(), args.fDrawContext->height(),
*args.fClip, *args.fShape,
*args.fViewMatrix, &unclippedDevShapeBounds,
&clippedDevShapeBounds,
&devClipBounds)) {
if (inverseFilled) {
DrawAroundInvPath(args.fDrawContext, *args.fPaint, *args.fUserStencilSettings,
*args.fClip,
*args.fViewMatrix, devClipBounds, unclippedDevShapeBounds);
}
return true;
}
const SkIRect* boundsForMask = &clippedDevShapeBounds;
if (useCache) {
// Use the cache only if >50% of the path is visible.
int unclippedWidth = unclippedDevShapeBounds.width();
int unclippedHeight = unclippedDevShapeBounds.height();
int unclippedArea = unclippedWidth * unclippedHeight;
int clippedArea = clippedDevShapeBounds.width() * clippedDevShapeBounds.height();
int maxTextureSize = args.fDrawContext->caps()->maxTextureSize();
if (unclippedArea > 2 * clippedArea || unclippedWidth > maxTextureSize ||
unclippedHeight > maxTextureSize) {
useCache = false;
} else {
boundsForMask = &unclippedDevShapeBounds;
}
}
GrUniqueKey maskKey;
struct KeyData {
SkScalar fFractionalTranslateX;
SkScalar fFractionalTranslateY;
};
if (useCache) {
// We require the upper left 2x2 of the matrix to match exactly for a cache hit.
SkScalar sx = args.fViewMatrix->get(SkMatrix::kMScaleX);
SkScalar sy = args.fViewMatrix->get(SkMatrix::kMScaleY);
SkScalar kx = args.fViewMatrix->get(SkMatrix::kMSkewX);
SkScalar ky = args.fViewMatrix->get(SkMatrix::kMSkewY);
SkScalar tx = args.fViewMatrix->get(SkMatrix::kMTransX);
SkScalar ty = args.fViewMatrix->get(SkMatrix::kMTransY);
// Allow 8 bits each in x and y of subpixel positioning.
SkFixed fracX = SkScalarToFixed(SkScalarFraction(tx)) & 0x0000FF00;
SkFixed fracY = SkScalarToFixed(SkScalarFraction(ty)) & 0x0000FF00;
static const GrUniqueKey::Domain kDomain = GrUniqueKey::GenerateDomain();
GrUniqueKey::Builder builder(&maskKey, kDomain, 5 + args.fShape->unstyledKeySize());
builder[0] = SkFloat2Bits(sx);
builder[1] = SkFloat2Bits(sy);
builder[2] = SkFloat2Bits(kx);
builder[3] = SkFloat2Bits(ky);
builder[4] = fracX | (fracY >> 8);
args.fShape->writeUnstyledKey(&builder[5]);
}
sk_sp<GrTexture> texture;
if (useCache) {
texture.reset(args.fResourceProvider->findAndRefTextureByUniqueKey(maskKey));
}
if (!texture) {
GrSWMaskHelper::TextureType type = useCache ? GrSWMaskHelper::TextureType::kExactFit
: GrSWMaskHelper::TextureType::kApproximateFit;
texture.reset(GrSWMaskHelper::DrawShapeMaskToTexture(fTexProvider, *args.fShape,
*boundsForMask, args.fAntiAlias,
type, args.fViewMatrix));
if (!texture) {
return false;
}
if (useCache) {
texture->resourcePriv().setUniqueKey(maskKey);
}
}
GrSWMaskHelper::DrawToTargetWithShapeMask(texture.get(), args.fDrawContext, *args.fPaint,
*args.fUserStencilSettings,
*args.fClip, *args.fViewMatrix,
SkIPoint {boundsForMask->fLeft, boundsForMask->fTop},
*boundsForMask);
if (inverseFilled) {
DrawAroundInvPath(args.fDrawContext, *args.fPaint, *args.fUserStencilSettings,
*args.fClip,
*args.fViewMatrix, devClipBounds, unclippedDevShapeBounds);
}
return true;
}
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