Move StrokeRectBatches into .cpp files

src/gpu/batches/GrNonAAStrokeRectBatch.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrNonAAStrokeRectBatch.h"
+
+#include "GrBatchTest.h"
+#include "GrBatchFlushState.h"
+#include "GrColor.h"
+#include "GrDefaultGeoProcFactory.h"
+#include "GrVertexBatch.h"
+#include "SkRandom.h"
+
+/*  create a triangle strip that strokes the specified rect. There are 8
+    unique vertices, but we repeat the last 2 to close up. Alternatively we
+    could use an indices array, and then only send 8 verts, but not sure that
+    would be faster.
+    */
+static void init_stroke_rect_strip(SkPoint verts[10], const SkRect& rect, SkScalar width) {
+    const SkScalar rad = SkScalarHalf(width);
+    // TODO we should be able to enable this assert, but we'd have to filter these draws
+    // this is a bug
+    //SkASSERT(rad < rect.width() / 2 && rad < rect.height() / 2);
+
+    verts[0].set(rect.fLeft + rad, rect.fTop + rad);
+    verts[1].set(rect.fLeft - rad, rect.fTop - rad);
+    verts[2].set(rect.fRight - rad, rect.fTop + rad);
+    verts[3].set(rect.fRight + rad, rect.fTop - rad);
+    verts[4].set(rect.fRight - rad, rect.fBottom - rad);
+    verts[5].set(rect.fRight + rad, rect.fBottom + rad);
+    verts[6].set(rect.fLeft + rad, rect.fBottom - rad);
+    verts[7].set(rect.fLeft - rad, rect.fBottom + rad);
+    verts[8] = verts[0];
+    verts[9] = verts[1];
+}
+
+class NonAAStrokeRectBatch : public GrVertexBatch {
+public:
+    DEFINE_BATCH_CLASS_ID
+
+    struct Geometry {
+        SkMatrix fViewMatrix;
+        SkRect fRect;
+        SkScalar fStrokeWidth;
+        GrColor fColor;
+    };
+
+    static GrDrawBatch* Create(GrColor color, const SkMatrix& viewMatrix, const SkRect& rect,
+                               SkScalar strokeWidth, bool snapToPixelCenters) {
+        return new NonAAStrokeRectBatch(color, viewMatrix, rect, strokeWidth, snapToPixelCenters);
+    }
+
+    const char* name() const override { return "GrStrokeRectBatch"; }
+
+    void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
+        // When this is called on a batch, there is only one geometry bundle
+        out->setKnownFourComponents(fGeoData[0].fColor);
+    }
+
+    void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
+        out->setKnownSingleComponent(0xff);
+    }
+
+private:
+    void onPrepareDraws(Target* target) override {
+        SkAutoTUnref<const GrGeometryProcessor> gp;
+        {
+            using namespace GrDefaultGeoProcFactory;
+            Color color(this->color());
+            Coverage coverage(this->coverageIgnored() ? Coverage::kSolid_Type :
+                                                        Coverage::kNone_Type);
+            LocalCoords localCoords(this->usesLocalCoords() ? LocalCoords::kUsePosition_Type :
+                                                                LocalCoords::kUnused_Type);
+            gp.reset(GrDefaultGeoProcFactory::Create(color, coverage, localCoords,
+                                                        this->viewMatrix()));
+        }
+
+        target->initDraw(gp, this->pipeline());
+
+        size_t vertexStride = gp->getVertexStride();
+
+        SkASSERT(vertexStride == sizeof(GrDefaultGeoProcFactory::PositionAttr));
+
+        Geometry& args = fGeoData[0];
+
+        int vertexCount = kVertsPerHairlineRect;
+        if (args.fStrokeWidth > 0) {
+            vertexCount = kVertsPerStrokeRect;
+        }
+
+        const GrVertexBuffer* vertexBuffer;
+        int firstVertex;
+
+        void* verts = target->makeVertexSpace(vertexStride, vertexCount, &vertexBuffer,
+                                              &firstVertex);
+
+        if (!verts) {
+            SkDebugf("Could not allocate vertices\n");
+            return;
+        }
+
+        SkPoint* vertex = reinterpret_cast<SkPoint*>(verts);
+
+        GrPrimitiveType primType;
+
+        if (args.fStrokeWidth > 0) {;
+            primType = kTriangleStrip_GrPrimitiveType;
+            args.fRect.sort();
+            init_stroke_rect_strip(vertex, args.fRect, args.fStrokeWidth);
+        } else {
+            // hairline
+            primType = kLineStrip_GrPrimitiveType;
+            vertex[0].set(args.fRect.fLeft, args.fRect.fTop);
+            vertex[1].set(args.fRect.fRight, args.fRect.fTop);
+            vertex[2].set(args.fRect.fRight, args.fRect.fBottom);
+            vertex[3].set(args.fRect.fLeft, args.fRect.fBottom);
+            vertex[4].set(args.fRect.fLeft, args.fRect.fTop);
+        }
+
+        GrVertices vertices;
+        vertices.init(primType, vertexBuffer, firstVertex, vertexCount);
+        target->draw(vertices);
+    }
+    void initBatchTracker(const GrPipelineOptimizations& opt) override {
+        // Handle any color overrides
+        if (!opt.readsColor()) {
+            fGeoData[0].fColor = GrColor_ILLEGAL;
+        }
+        opt.getOverrideColorIfSet(&fGeoData[0].fColor);
+
+        // setup batch properties
+        fBatch.fColorIgnored = !opt.readsColor();
+        fBatch.fColor = fGeoData[0].fColor;
+        fBatch.fUsesLocalCoords = opt.readsLocalCoords();
+        fBatch.fCoverageIgnored = !opt.readsCoverage();
+    }
+
+    NonAAStrokeRectBatch(GrColor color, const SkMatrix& viewMatrix, const SkRect& rect,
+                      SkScalar strokeWidth, bool snapToPixelCenters)
+        : INHERITED(ClassID()) {
+        Geometry& geometry = fGeoData.push_back();
+        geometry.fViewMatrix = viewMatrix;
+        geometry.fRect = rect;
+        geometry.fStrokeWidth = strokeWidth;
+        geometry.fColor = color;
+
+        fBatch.fHairline = geometry.fStrokeWidth == 0;
+
+        fGeoData.push_back(geometry);
+
+        // setup bounds
+        fBounds = geometry.fRect;
+        SkScalar rad = SkScalarHalf(geometry.fStrokeWidth);
+        fBounds.outset(rad, rad);
+        geometry.fViewMatrix.mapRect(&fBounds);
+
+        // If our caller snaps to pixel centers then we have to round out the bounds
+        if (snapToPixelCenters) {
+            fBounds.roundOut();
+        }
+    }
+
+    GrColor color() const { return fBatch.fColor; }
+    bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
+    bool colorIgnored() const { return fBatch.fColorIgnored; }
+    const SkMatrix& viewMatrix() const { return fGeoData[0].fViewMatrix; }
+    bool hairline() const { return fBatch.fHairline; }
+    bool coverageIgnored() const { return fBatch.fCoverageIgnored; }
+
+    bool onCombineIfPossible(GrBatch* t, const GrCaps&) override {
+        // if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *t->pipeline(),
+        //     t->bounds(), caps)) {
+        //     return false;
+        // }
+        // GrStrokeRectBatch* that = t->cast<StrokeRectBatch>();
+
+        // NonAA stroke rects cannot batch right now
+        // TODO make these batchable
+        return false;
+    }
+
+    struct BatchTracker {
+        GrColor fColor;
+        bool fUsesLocalCoords;
+        bool fColorIgnored;
+        bool fCoverageIgnored;
+        bool fHairline;
+    };
+
+    const static int kVertsPerHairlineRect = 5;
+    const static int kVertsPerStrokeRect = 10;
+
+    BatchTracker fBatch;
+    SkSTArray<1, Geometry, true> fGeoData;
+
+    typedef GrVertexBatch INHERITED;
+};
+
+namespace GrNonAAStrokeRectBatch {
+
+GrDrawBatch* Create(GrColor color,
+                    const SkMatrix& viewMatrix,
+                    const SkRect& rect,
+                    SkScalar strokeWidth,
+                    bool snapToPixelCenters) {
+    return NonAAStrokeRectBatch::Create(color, viewMatrix, rect, strokeWidth, snapToPixelCenters);
+}
+
+};
+
+#ifdef GR_TEST_UTILS
+
+DRAW_BATCH_TEST_DEFINE(NonAAStrokeRectBatch) {
+    SkMatrix viewMatrix = GrTest::TestMatrix(random);
+    GrColor color = GrRandomColor(random);
+    SkRect rect = GrTest::TestRect(random);
+    SkScalar strokeWidth = random->nextBool() ? 0.0f : 1.0f;
+
+    return NonAAStrokeRectBatch::Create(color, viewMatrix, rect, strokeWidth, random->nextBool());
+}
+
+#endif