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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 "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);
}
namespace {
////////////////////////////////////////////////////////////////////////////////
// gets device coord bounds of path (not considering the fill) and clip. The
// path bounds will be a subset of the clip bounds. returns false if
// path bounds would be empty.
bool get_shape_and_clip_bounds(int width, int height,
const GrClip& clip,
const GrShape& shape,
const SkMatrix& matrix,
SkIRect* devShapeBounds,
SkIRect* devClipBounds) {
// compute bounds as intersection of rt size, clip, and path
clip.getConservativeBounds(width, height, devClipBounds);
if (devClipBounds->isEmpty()) {
*devShapeBounds = SkIRect::MakeWH(width, height);
return false;
}
SkRect shapeBounds = shape.styledBounds();
if (!shapeBounds.isEmpty()) {
SkRect shapeSBounds;
matrix.mapRect(&shapeSBounds, shapeBounds);
SkIRect shapeIBounds;
shapeSBounds.roundOut(&shapeIBounds);
*devShapeBounds = *devClipBounds;
if (!devShapeBounds->intersect(shapeIBounds)) {
// set the correct path bounds, as this would be used later.
*devShapeBounds = shapeIBounds;
return false;
}
} else {
*devShapeBounds = 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 devShapeBounds, devClipBounds;
if (!get_shape_and_clip_bounds(args.fDrawContext->width(), args.fDrawContext->height(),
*args.fClip, *args.fShape,
*args.fViewMatrix, &devShapeBounds, &devClipBounds)) {
if (inverseFilled) {
DrawAroundInvPath(args.fDrawContext, *args.fPaint, *args.fUserStencilSettings,
*args.fClip,
*args.fViewMatrix, devClipBounds, devShapeBounds);
}
return true;
}
SkAutoTUnref<GrTexture> texture(
GrSWMaskHelper::DrawShapeMaskToTexture(fTexProvider, *args.fShape, devShapeBounds,
args.fAntiAlias, args.fViewMatrix));
if (!texture) {
return false;
}
GrSWMaskHelper::DrawToTargetWithShapeMask(texture, args.fDrawContext, *args.fPaint,
*args.fUserStencilSettings,
*args.fClip, *args.fViewMatrix,
devShapeBounds);
if (inverseFilled) {
DrawAroundInvPath(args.fDrawContext, *args.fPaint, *args.fUserStencilSettings,
*args.fClip,
*args.fViewMatrix, devClipBounds, devShapeBounds);
}
return true;
}
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