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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 bool antiAlias) { | 598 bool antiAlias) { |
599 | 599 |
600 const SkPath* path = &origPath; | 600 const SkPath* path = &origPath; |
601 if (path->isEmpty()) { | 601 if (path->isEmpty()) { |
602 return true; | 602 return true; |
603 } | 603 } |
604 | 604 |
605 GrDrawTarget::AutoStateRestore asr(target, GrDrawTarget::kPreserve_ASRInit); | 605 GrDrawTarget::AutoStateRestore asr(target, GrDrawTarget::kPreserve_ASRInit); |
606 GrDrawState* drawState = target->drawState(); | 606 GrDrawState* drawState = target->drawState(); |
607 | 607 |
608 GrDrawState::AutoDeviceCoordDraw adcd(drawState); | 608 SkMatrix viewMatrix = drawState->getViewMatrix(); |
609 if (!adcd.succeeded()) { | 609 GrDrawState::AutoViewMatrixRestore avmr; |
| 610 if (!avmr.setIdentity(drawState)) { |
610 return false; | 611 return false; |
611 } | 612 } |
612 const SkMatrix* vm = &adcd.getOriginalMatrix(); | |
613 | 613 |
614 // We use the fact that SkPath::transform path does subdivision based on | 614 // We use the fact that SkPath::transform path does subdivision based on |
615 // perspective. Otherwise, we apply the view matrix when copying to the | 615 // perspective. Otherwise, we apply the view matrix when copying to the |
616 // segment representation. | 616 // segment representation. |
617 SkPath tmpPath; | 617 SkPath tmpPath; |
618 if (vm->hasPerspective()) { | 618 if (viewMatrix.hasPerspective()) { |
619 origPath.transform(*vm, &tmpPath); | 619 origPath.transform(viewMatrix, &tmpPath); |
620 path = &tmpPath; | 620 path = &tmpPath; |
621 vm = &SkMatrix::I(); | 621 viewMatrix = SkMatrix::I(); |
622 } | 622 } |
623 | 623 |
624 QuadVertex *verts; | 624 QuadVertex *verts; |
625 uint16_t* idxs; | 625 uint16_t* idxs; |
626 | 626 |
627 int vCount; | 627 int vCount; |
628 int iCount; | 628 int iCount; |
629 enum { | 629 enum { |
630 kPreallocSegmentCnt = 512 / sizeof(Segment), | 630 kPreallocSegmentCnt = 512 / sizeof(Segment), |
631 kPreallocDrawCnt = 4, | 631 kPreallocDrawCnt = 4, |
632 }; | 632 }; |
633 SkSTArray<kPreallocSegmentCnt, Segment, true> segments; | 633 SkSTArray<kPreallocSegmentCnt, Segment, true> segments; |
634 SkPoint fanPt; | 634 SkPoint fanPt; |
635 | 635 |
636 if (!get_segments(*path, *vm, &segments, &fanPt, &vCount, &iCount)) { | 636 if (!get_segments(*path, viewMatrix, &segments, &fanPt, &vCount, &iCount)) { |
637 return false; | 637 return false; |
638 } | 638 } |
639 | 639 |
640 drawState->setVertexAttribs<gPathAttribs>(SK_ARRAY_COUNT(gPathAttribs)); | 640 drawState->setVertexAttribs<gPathAttribs>(SK_ARRAY_COUNT(gPathAttribs)); |
641 | 641 |
642 enum { | 642 enum { |
643 // the edge effects share this stage with glyph rendering | 643 // the edge effects share this stage with glyph rendering |
644 // (kGlyphMaskStage in GrTextContext) && SW path rendering | 644 // (kGlyphMaskStage in GrTextContext) && SW path rendering |
645 // (kPathMaskStage in GrSWMaskHelper) | 645 // (kPathMaskStage in GrSWMaskHelper) |
646 kEdgeEffectStage = GrPaint::kTotalStages, | 646 kEdgeEffectStage = GrPaint::kTotalStages, |
647 }; | 647 }; |
648 static const int kEdgeAttrIndex = 1; | 648 static const int kEdgeAttrIndex = 1; |
649 GrEffectRef* quadEffect = QuadEdgeEffect::Create(); | 649 GrEffectRef* quadEffect = QuadEdgeEffect::Create(); |
650 drawState->setEffect(kEdgeEffectStage, quadEffect, kEdgeAttrIndex)->unref(); | 650 drawState->setEffect(kEdgeEffectStage, quadEffect, kEdgeAttrIndex)->unref(); |
651 | 651 |
652 GrDrawTarget::AutoReleaseGeometry arg(target, vCount, iCount); | 652 GrDrawTarget::AutoReleaseGeometry arg(target, vCount, iCount); |
653 if (!arg.succeeded()) { | 653 if (!arg.succeeded()) { |
654 return false; | 654 return false; |
655 } | 655 } |
656 GrAssert(sizeof(QuadVertex) == drawState->getVertexSize()); | 656 GrAssert(sizeof(QuadVertex) == drawState->getVertexSize()); |
657 verts = reinterpret_cast<QuadVertex*>(arg.vertices()); | 657 verts = reinterpret_cast<QuadVertex*>(arg.vertices()); |
658 idxs = reinterpret_cast<uint16_t*>(arg.indices()); | 658 idxs = reinterpret_cast<uint16_t*>(arg.indices()); |
659 | 659 |
660 SkSTArray<kPreallocDrawCnt, Draw, true> draws; | 660 SkSTArray<kPreallocDrawCnt, Draw, true> draws; |
661 create_vertices(segments, fanPt, &draws, verts, idxs); | 661 create_vertices(segments, fanPt, &draws, verts, idxs); |
662 | 662 |
663 // This is valid because all the computed verts are within 1 pixel of the pa
th control points. | 663 // This is valid because all the computed verts are within 1 pixel of the pa
th control points. |
664 SkRect devBounds; | 664 SkRect devBounds; |
665 devBounds = origPath.getBounds(); | 665 devBounds = path->getBounds(); |
666 adcd.getOriginalMatrix().mapRect(&devBounds); | 666 viewMatrix.mapRect(&devBounds); |
667 devBounds.outset(SK_Scalar1, SK_Scalar1); | 667 devBounds.outset(SK_Scalar1, SK_Scalar1); |
668 | 668 |
669 // Check devBounds | 669 // Check devBounds |
670 #if GR_DEBUG | 670 #if GR_DEBUG |
671 SkRect tolDevBounds = devBounds; | 671 SkRect tolDevBounds = devBounds; |
672 tolDevBounds.outset(SK_Scalar1 / 10000, SK_Scalar1 / 10000); | 672 tolDevBounds.outset(SK_Scalar1 / 10000, SK_Scalar1 / 10000); |
673 SkRect actualBounds; | 673 SkRect actualBounds; |
674 actualBounds.set(verts[0].fPos, verts[1].fPos); | 674 actualBounds.set(verts[0].fPos, verts[1].fPos); |
675 for (int i = 2; i < vCount; ++i) { | 675 for (int i = 2; i < vCount; ++i) { |
676 actualBounds.growToInclude(verts[i].fPos.fX, verts[i].fPos.fY); | 676 actualBounds.growToInclude(verts[i].fPos.fX, verts[i].fPos.fY); |
677 } | 677 } |
678 GrAssert(tolDevBounds.contains(actualBounds)); | 678 GrAssert(tolDevBounds.contains(actualBounds)); |
679 #endif | 679 #endif |
680 | 680 |
681 int vOffset = 0; | 681 int vOffset = 0; |
682 for (int i = 0; i < draws.count(); ++i) { | 682 for (int i = 0; i < draws.count(); ++i) { |
683 const Draw& draw = draws[i]; | 683 const Draw& draw = draws[i]; |
684 target->drawIndexed(kTriangles_GrPrimitiveType, | 684 target->drawIndexed(kTriangles_GrPrimitiveType, |
685 vOffset, // start vertex | 685 vOffset, // start vertex |
686 0, // start index | 686 0, // start index |
687 draw.fVertexCnt, | 687 draw.fVertexCnt, |
688 draw.fIndexCnt, | 688 draw.fIndexCnt, |
689 &devBounds); | 689 &devBounds); |
690 vOffset += draw.fVertexCnt; | 690 vOffset += draw.fVertexCnt; |
691 } | 691 } |
692 | 692 |
693 return true; | 693 return true; |
694 } | 694 } |
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