コード例 #1
0
ファイル: GrAARectRenderer.cpp プロジェクト: Jichao/skia
    void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override {
        bool canTweakAlphaForCoverage = this->canTweakAlphaForCoverage();

        // Local matrix is ignored if we don't have local coords.  If we have localcoords we only
        // batch with identical view matrices
        SkMatrix localMatrix;
        if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) {
            SkDebugf("Cannot invert\n");
            return;
        }

        SkAutoTUnref<const GrGeometryProcessor> gp(create_fill_rect_gp(canTweakAlphaForCoverage,
                                                                       localMatrix,
                                                                       this->usesLocalCoords(),
                                                                       this->coverageIgnored()));

        batchTarget->initDraw(gp, pipeline);

        size_t vertexStride = gp->getVertexStride();

        SkASSERT(canTweakAlphaForCoverage ?
                 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorAttr) :
                 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorCoverageAttr));
        int innerVertexNum = 4;
        int outerVertexNum = this->miterStroke() ? 4 : 8;
        int verticesPerInstance = (outerVertexNum + innerVertexNum) * 2;
        int indicesPerInstance = this->miterStroke() ? kMiterIndexCnt : kBevelIndexCnt;
        int instanceCount = fGeoData.count();

        const SkAutoTUnref<const GrIndexBuffer> indexBuffer(
            GetIndexBuffer(batchTarget->resourceProvider(), this->miterStroke()));
        InstancedHelper helper;
        void* vertices = helper.init(batchTarget, kTriangles_GrPrimitiveType, vertexStride,
                                     indexBuffer, verticesPerInstance,  indicesPerInstance,
                                     instanceCount);
        if (!vertices || !indexBuffer) {
             SkDebugf("Could not allocate vertices\n");
             return;
         }

        for (int i = 0; i < instanceCount; i++) {
            const Geometry& args = fGeoData[i];
            this->generateAAStrokeRectGeometry(vertices,
                                               i * verticesPerInstance * vertexStride,
                                               vertexStride,
                                               outerVertexNum,
                                               innerVertexNum,
                                               args.fColor,
                                               args.fDevOutside,
                                               args.fDevOutsideAssist,
                                               args.fDevInside,
                                               args.fMiterStroke,
                                               canTweakAlphaForCoverage);
        }
        helper.issueDraw(batchTarget);
    }
コード例 #2
0
ファイル: GrAARectRenderer.cpp プロジェクト: Jichao/skia
    void generateGeometry(GrBatchTarget* batchTarget, const GrPipeline* pipeline) override {
        bool canTweakAlphaForCoverage = this->canTweakAlphaForCoverage();

        SkMatrix localMatrix;
        if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) {
            SkDebugf("Cannot invert\n");
            return;
        }

        SkAutoTUnref<const GrGeometryProcessor> gp(create_fill_rect_gp(canTweakAlphaForCoverage,
                                                                       localMatrix,
                                                                       this->usesLocalCoords(),
                                                                       this->coverageIgnored()));

        batchTarget->initDraw(gp, pipeline);

        size_t vertexStride = gp->getVertexStride();
        SkASSERT(canTweakAlphaForCoverage ?
                 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorAttr) :
                 vertexStride == sizeof(GrDefaultGeoProcFactory::PositionColorCoverageAttr));
        int instanceCount = fGeoData.count();

        SkAutoTUnref<const GrIndexBuffer> indexBuffer(this->getIndexBuffer(
            batchTarget->resourceProvider()));
        InstancedHelper helper;
        void* vertices = helper.init(batchTarget, kTriangles_GrPrimitiveType, vertexStride,
                                     indexBuffer, kVertsPerAAFillRect, kIndicesPerAAFillRect,
                                     instanceCount);
        if (!vertices || !indexBuffer) {
            SkDebugf("Could not allocate vertices\n");
            return;
        }

        for (int i = 0; i < instanceCount; i++) {
            const Geometry& args = fGeoData[i];
            this->generateAAFillRectGeometry(vertices,
                                             i * kVertsPerAAFillRect * vertexStride,
                                             vertexStride,
                                             args.fColor,
                                             args.fViewMatrix,
                                             args.fRect,
                                             args.fDevRect,
                                             canTweakAlphaForCoverage);
        }

        helper.issueDraw(batchTarget);
    }