| |
| /* |
| * 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 "GrAndroidPathRenderer.h" |
| #include "AndroidPathRenderer.h" |
| #include "Vertex.h" |
| |
| GrAndroidPathRenderer::GrAndroidPathRenderer() { |
| } |
| |
| bool GrAndroidPathRenderer::canDrawPath(const SkPath& path, |
| const SkStrokeRec& stroke, |
| const GrDrawTarget* target, |
| bool antiAlias) const { |
| return ((stroke.isFillStyle() || stroke.getStyle() == SkStrokeRec::kStroke_Style) |
| && !path.isInverseFillType() && path.isConvex()); |
| } |
| |
| struct ColorVertex { |
| SkPoint pos; |
| GrColor color; |
| }; |
| |
| bool GrAndroidPathRenderer::onDrawPath(const SkPath& origPath, |
| const SkStrokeRec& stroke, |
| GrDrawTarget* target, |
| bool antiAlias) { |
| |
| // generate verts using Android algorithm |
| android::uirenderer::VertexBuffer vertices; |
| android::uirenderer::PathRenderer::ConvexPathVertices(origPath, stroke, antiAlias, NULL, |
| &vertices); |
| |
| // set vertex layout depending on anti-alias |
| GrVertexLayout layout = antiAlias ? GrDrawState::kCoverage_VertexLayoutBit : 0; |
| |
| // allocate our vert buffer |
| int vertCount = vertices.getSize(); |
| GrDrawTarget::AutoReleaseGeometry geo(target, layout, vertCount, 0); |
| if (!geo.succeeded()) { |
| GrPrintf("Failed to get space for vertices!\n"); |
| return false; |
| } |
| |
| // copy android verts to our vertex buffer |
| if (antiAlias) { |
| ColorVertex* outVert = reinterpret_cast<ColorVertex*>(geo.vertices()); |
| android::uirenderer::AlphaVertex* inVert = |
| reinterpret_cast<android::uirenderer::AlphaVertex*>(vertices.getBuffer()); |
| |
| for (int i = 0; i < vertCount; ++i) { |
| // copy vertex position |
| outVert->pos.set(inVert->position[0], inVert->position[1]); |
| // copy alpha |
| int coverage = static_cast<int>(inVert->alpha * 0xff); |
| outVert->color = GrColorPackRGBA(coverage, coverage, coverage, coverage); |
| ++outVert; |
| ++inVert; |
| } |
| } else { |
| size_t vsize = GrDrawState::VertexSize(layout); |
| size_t copySize = vsize*vertCount; |
| memcpy(geo.vertices(), vertices.getBuffer(), copySize); |
| } |
| |
| // render it |
| target->drawNonIndexed(kTriangleStrip_GrPrimitiveType, 0, vertCount); |
| |
| return true; |
| } |