/* * 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 "GrAARectRenderer.h" #include "GrRefCnt.h" #include "GrGpu.h" SK_DEFINE_INST_COUNT(GrAARectRenderer) namespace { static GrVertexLayout aa_rect_layout(const GrDrawTarget* target, bool useCoverage) { GrVertexLayout layout = 0; if (useCoverage) { layout |= GrDrawTarget::kCoverage_VertexLayoutBit; } else { layout |= GrDrawTarget::kColor_VertexLayoutBit; } return layout; } static void setInsetFan(GrPoint* pts, size_t stride, const GrRect& r, GrScalar dx, GrScalar dy) { pts->setRectFan(r.fLeft + dx, r.fTop + dy, r.fRight - dx, r.fBottom - dy, stride); } }; void GrAARectRenderer::reset() { GrSafeSetNull(fAAFillRectIndexBuffer); GrSafeSetNull(fAAStrokeRectIndexBuffer); } const uint16_t GrAARectRenderer::gFillAARectIdx[] = { 0, 1, 5, 5, 4, 0, 1, 2, 6, 6, 5, 1, 2, 3, 7, 7, 6, 2, 3, 0, 4, 4, 7, 3, 4, 5, 6, 6, 7, 4, }; int GrAARectRenderer::aaFillRectIndexCount() { return GR_ARRAY_COUNT(gFillAARectIdx); } GrIndexBuffer* GrAARectRenderer::aaFillRectIndexBuffer(GrGpu* gpu) { if (NULL == fAAFillRectIndexBuffer) { fAAFillRectIndexBuffer = gpu->createIndexBuffer(sizeof(gFillAARectIdx), false); if (NULL != fAAFillRectIndexBuffer) { #if GR_DEBUG bool updated = #endif fAAFillRectIndexBuffer->updateData(gFillAARectIdx, sizeof(gFillAARectIdx)); GR_DEBUGASSERT(updated); } } return fAAFillRectIndexBuffer; } const uint16_t GrAARectRenderer::gStrokeAARectIdx[] = { 0 + 0, 1 + 0, 5 + 0, 5 + 0, 4 + 0, 0 + 0, 1 + 0, 2 + 0, 6 + 0, 6 + 0, 5 + 0, 1 + 0, 2 + 0, 3 + 0, 7 + 0, 7 + 0, 6 + 0, 2 + 0, 3 + 0, 0 + 0, 4 + 0, 4 + 0, 7 + 0, 3 + 0, 0 + 4, 1 + 4, 5 + 4, 5 + 4, 4 + 4, 0 + 4, 1 + 4, 2 + 4, 6 + 4, 6 + 4, 5 + 4, 1 + 4, 2 + 4, 3 + 4, 7 + 4, 7 + 4, 6 + 4, 2 + 4, 3 + 4, 0 + 4, 4 + 4, 4 + 4, 7 + 4, 3 + 4, 0 + 8, 1 + 8, 5 + 8, 5 + 8, 4 + 8, 0 + 8, 1 + 8, 2 + 8, 6 + 8, 6 + 8, 5 + 8, 1 + 8, 2 + 8, 3 + 8, 7 + 8, 7 + 8, 6 + 8, 2 + 8, 3 + 8, 0 + 8, 4 + 8, 4 + 8, 7 + 8, 3 + 8, }; int GrAARectRenderer::aaStrokeRectIndexCount() { return GR_ARRAY_COUNT(gStrokeAARectIdx); } GrIndexBuffer* GrAARectRenderer::aaStrokeRectIndexBuffer(GrGpu* gpu) { if (NULL == fAAStrokeRectIndexBuffer) { fAAStrokeRectIndexBuffer = gpu->createIndexBuffer(sizeof(gStrokeAARectIdx), false); if (NULL != fAAStrokeRectIndexBuffer) { #if GR_DEBUG bool updated = #endif fAAStrokeRectIndexBuffer->updateData(gStrokeAARectIdx, sizeof(gStrokeAARectIdx)); GR_DEBUGASSERT(updated); } } return fAAStrokeRectIndexBuffer; } void GrAARectRenderer::fillAARect(GrGpu* gpu, GrDrawTarget* target, const GrRect& devRect, bool useVertexCoverage) { GrVertexLayout layout = aa_rect_layout(target, useVertexCoverage); size_t vsize = GrDrawTarget::VertexSize(layout); GrDrawTarget::AutoReleaseGeometry geo(target, layout, 8, 0); if (!geo.succeeded()) { GrPrintf("Failed to get space for vertices!\n"); return; } GrIndexBuffer* indexBuffer = this->aaFillRectIndexBuffer(gpu); if (NULL == indexBuffer) { GrPrintf("Failed to create index buffer!\n"); return; } intptr_t verts = reinterpret_cast(geo.vertices()); GrPoint* fan0Pos = reinterpret_cast(verts); GrPoint* fan1Pos = reinterpret_cast(verts + 4 * vsize); setInsetFan(fan0Pos, vsize, devRect, -GR_ScalarHalf, -GR_ScalarHalf); setInsetFan(fan1Pos, vsize, devRect, GR_ScalarHalf, GR_ScalarHalf); verts += sizeof(GrPoint); for (int i = 0; i < 4; ++i) { *reinterpret_cast(verts + i * vsize) = 0; } GrColor innerColor; if (useVertexCoverage) { innerColor = 0xffffffff; } else { innerColor = target->getDrawState().getColor(); } verts += 4 * vsize; for (int i = 0; i < 4; ++i) { *reinterpret_cast(verts + i * vsize) = innerColor; } target->setIndexSourceToBuffer(indexBuffer); target->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 8, this->aaFillRectIndexCount()); } void GrAARectRenderer::strokeAARect(GrGpu* gpu, GrDrawTarget* target, const GrRect& devRect, const GrVec& devStrokeSize, bool useVertexCoverage) { const GrScalar& dx = devStrokeSize.fX; const GrScalar& dy = devStrokeSize.fY; const GrScalar rx = GrMul(dx, GR_ScalarHalf); const GrScalar ry = GrMul(dy, GR_ScalarHalf); GrScalar spare; { GrScalar w = devRect.width() - dx; GrScalar h = devRect.height() - dy; spare = GrMin(w, h); } if (spare <= 0) { GrRect r(devRect); r.inset(-rx, -ry); this->fillAARect(gpu, target, r, useVertexCoverage); return; } GrVertexLayout layout = aa_rect_layout(target, useVertexCoverage); size_t vsize = GrDrawTarget::VertexSize(layout); GrDrawTarget::AutoReleaseGeometry geo(target, layout, 16, 0); if (!geo.succeeded()) { GrPrintf("Failed to get space for vertices!\n"); return; } GrIndexBuffer* indexBuffer = this->aaStrokeRectIndexBuffer(gpu); if (NULL == indexBuffer) { GrPrintf("Failed to create index buffer!\n"); return; } intptr_t verts = reinterpret_cast(geo.vertices()); GrPoint* fan0Pos = reinterpret_cast(verts); GrPoint* fan1Pos = reinterpret_cast(verts + 4 * vsize); GrPoint* fan2Pos = reinterpret_cast(verts + 8 * vsize); GrPoint* fan3Pos = reinterpret_cast(verts + 12 * vsize); setInsetFan(fan0Pos, vsize, devRect, -rx - GR_ScalarHalf, -ry - GR_ScalarHalf); setInsetFan(fan1Pos, vsize, devRect, -rx + GR_ScalarHalf, -ry + GR_ScalarHalf); setInsetFan(fan2Pos, vsize, devRect, rx - GR_ScalarHalf, ry - GR_ScalarHalf); setInsetFan(fan3Pos, vsize, devRect, rx + GR_ScalarHalf, ry + GR_ScalarHalf); verts += sizeof(GrPoint); for (int i = 0; i < 4; ++i) { *reinterpret_cast(verts + i * vsize) = 0; } GrColor innerColor; if (useVertexCoverage) { innerColor = 0xffffffff; } else { innerColor = target->getDrawState().getColor(); } verts += 4 * vsize; for (int i = 0; i < 8; ++i) { *reinterpret_cast(verts + i * vsize) = innerColor; } verts += 8 * vsize; for (int i = 0; i < 8; ++i) { *reinterpret_cast(verts + i * vsize) = 0; } target->setIndexSourceToBuffer(indexBuffer); target->drawIndexed(kTriangles_GrPrimitiveType, 0, 0, 16, aaStrokeRectIndexCount()); }