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Side by Side Diff: src/gpu/GrAAConvexPathRenderer.cpp

Issue 23926019: Stateful PathRenderer implementation (Closed) Base URL: http://skia.googlecode.com/svn/trunk/
Patch Set: add assert & patch for missing AutoPathClear Created 6 years, 10 months ago
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1 1
2 /* 2 /*
3 * Copyright 2012 Google Inc. 3 * Copyright 2012 Google Inc.
4 * 4 *
5 * Use of this source code is governed by a BSD-style license that can be 5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file. 6 * found in the LICENSE file.
7 */ 7 */
8 8
9 #include "GrAAConvexPathRenderer.h" 9 #include "GrAAConvexPathRenderer.h"
10 10
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598 GrEffectRef* QuadEdgeEffect::TestCreate(SkRandom* random, 598 GrEffectRef* QuadEdgeEffect::TestCreate(SkRandom* random,
599 GrContext*, 599 GrContext*,
600 const GrDrawTargetCaps& caps, 600 const GrDrawTargetCaps& caps,
601 GrTexture*[]) { 601 GrTexture*[]) {
602 // Doesn't work without derivative instructions. 602 // Doesn't work without derivative instructions.
603 return caps.shaderDerivativeSupport() ? QuadEdgeEffect::Create() : NULL; 603 return caps.shaderDerivativeSupport() ? QuadEdgeEffect::Create() : NULL;
604 } 604 }
605 605
606 /////////////////////////////////////////////////////////////////////////////// 606 ///////////////////////////////////////////////////////////////////////////////
607 607
608 bool GrAAConvexPathRenderer::canDrawPath(const SkPath& path, 608 bool GrAAConvexPathRenderer::canDrawPath(const SkStrokeRec& stroke,
609 const SkStrokeRec& stroke,
610 const GrDrawTarget* target, 609 const GrDrawTarget* target,
611 bool antiAlias) const { 610 bool antiAlias) const {
612 return (target->caps()->shaderDerivativeSupport() && antiAlias && 611 return (target->caps()->shaderDerivativeSupport() && antiAlias &&
613 stroke.isFillStyle() && !path.isInverseFillType() && path.isConvex() ); 612 stroke.isFillStyle() && !this->path().isInverseFillType() && this->p ath().isConvex());
614 } 613 }
615 614
616 namespace { 615 namespace {
617 616
618 // position + edge 617 // position + edge
619 extern const GrVertexAttrib gPathAttribs[] = { 618 extern const GrVertexAttrib gPathAttribs[] = {
620 {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding }, 619 {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding },
621 {kVec4f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding} 620 {kVec4f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding}
622 }; 621 };
623 622
624 }; 623 };
625 624
626 bool GrAAConvexPathRenderer::onDrawPath(const SkPath& origPath, 625 bool GrAAConvexPathRenderer::onDrawPath(const SkStrokeRec&,
627 const SkStrokeRec&,
628 GrDrawTarget* target, 626 GrDrawTarget* target,
629 bool antiAlias) { 627 bool antiAlias) {
630 628
631 const SkPath* path = &origPath; 629 const SkPath* path = &this->path();
632 if (path->isEmpty()) { 630 if (path->isEmpty()) {
633 return true; 631 return true;
634 } 632 }
635 633
636 SkMatrix viewMatrix = target->getDrawState().getViewMatrix(); 634 SkMatrix viewMatrix = target->getDrawState().getViewMatrix();
637 GrDrawTarget::AutoStateRestore asr; 635 GrDrawTarget::AutoStateRestore asr;
638 if (!asr.setIdentity(target, GrDrawTarget::kPreserve_ASRInit)) { 636 if (!asr.setIdentity(target, GrDrawTarget::kPreserve_ASRInit)) {
639 return false; 637 return false;
640 } 638 }
641 GrDrawState* drawState = target->drawState(); 639 GrDrawState* drawState = target->drawState();
642 640
643 // We use the fact that SkPath::transform path does subdivision based on 641 // We use the fact that SkPath::transform path does subdivision based on
644 // perspective. Otherwise, we apply the view matrix when copying to the 642 // perspective. Otherwise, we apply the view matrix when copying to the
645 // segment representation. 643 // segment representation.
646 SkPath tmpPath; 644 SkPath tmpPath;
647 if (viewMatrix.hasPerspective()) { 645 if (viewMatrix.hasPerspective()) {
648 origPath.transform(viewMatrix, &tmpPath); 646 this->path().transform(viewMatrix, &tmpPath);
649 path = &tmpPath; 647 path = &tmpPath;
650 viewMatrix = SkMatrix::I(); 648 viewMatrix = SkMatrix::I();
651 } 649 }
652 650
653 QuadVertex *verts; 651 QuadVertex *verts;
654 uint16_t* idxs; 652 uint16_t* idxs;
655 653
656 int vCount; 654 int vCount;
657 int iCount; 655 int iCount;
658 enum { 656 enum {
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708 vOffset, // start vertex 706 vOffset, // start vertex
709 0, // start index 707 0, // start index
710 draw.fVertexCnt, 708 draw.fVertexCnt,
711 draw.fIndexCnt, 709 draw.fIndexCnt,
712 &devBounds); 710 &devBounds);
713 vOffset += draw.fVertexCnt; 711 vOffset += draw.fVertexCnt;
714 } 712 }
715 713
716 return true; 714 return true;
717 } 715 }
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