GrDrawVertices to batches

src/gpu/batches/GrDrawVerticesBatch.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 "GrDrawVerticesBatch.h"
+
+#include "GrBatchTarget.h"
+#include "GrInvariantOutput.h"
+#include "GrDefaultGeoProcFactory.h"
+
+static const GrGeometryProcessor* set_vertex_attributes(bool hasLocalCoords,
+                                                        bool hasColors,
+                                                        int* colorOffset,
+                                                        int* texOffset,
+                                                        GrColor color,
+                                                        const SkMatrix& viewMatrix,
+                                                        bool coverageIgnored) {
+    using namespace GrDefaultGeoProcFactory;
+    *texOffset = -1;
+    *colorOffset = -1;
+    Color gpColor(color);
+    if (hasColors) {
+        gpColor.fType = Color::kAttribute_Type;
+    }
+
+    Coverage coverage(coverageIgnored ? Coverage::kNone_Type : Coverage::kSolid_Type);
+    LocalCoords localCoords(hasLocalCoords ? LocalCoords::kHasExplicit_Type :
+                                             LocalCoords::kUsePosition_Type);
+    if (hasLocalCoords && hasColors) {
+        *colorOffset = sizeof(SkPoint);
+        *texOffset = sizeof(SkPoint) + sizeof(GrColor);
+    } else if (hasLocalCoords) {
+        *texOffset = sizeof(SkPoint);
+    } else if (hasColors) {
+        *colorOffset = sizeof(SkPoint);
+    }
+    return GrDefaultGeoProcFactory::Create(gpColor, coverage, localCoords, viewMatrix);
+}
+
+GrDrawVerticesBatch::GrDrawVerticesBatch(const Geometry& geometry, GrPrimitiveType primitiveType,
+                                         const SkMatrix& viewMatrix,
+                                         const SkPoint* positions, int vertexCount,
+                                         const uint16_t* indices, int indexCount,
+                                         const GrColor* colors, const SkPoint* localCoords,
+                                         const SkRect& bounds) {
+    this->initClassID<GrDrawVerticesBatch>();
+    SkASSERT(positions);
+
+    fBatch.fViewMatrix = viewMatrix;
+    Geometry& installedGeo = fGeoData.push_back(geometry);
+
+    installedGeo.fPositions.append(vertexCount, positions);
+    if (indices) {
+        installedGeo.fIndices.append(indexCount, indices);
+        fBatch.fHasIndices = true;
+    } else {
+        fBatch.fHasIndices = false;
+    }
+
+    if (colors) {
+        installedGeo.fColors.append(vertexCount, colors);
+        fBatch.fHasColors = true;
+    } else {
+        fBatch.fHasColors = false;
+    }
+
+    if (localCoords) {
+        installedGeo.fLocalCoords.append(vertexCount, localCoords);
+        fBatch.fHasLocalCoords = true;
+    } else {
+        fBatch.fHasLocalCoords = false;
+    }
+    fBatch.fVertexCount = vertexCount;
+    fBatch.fIndexCount = indexCount;
+    fBatch.fPrimitiveType = primitiveType;
+
+    this->setBounds(bounds);
+}
+
+void GrDrawVerticesBatch::getInvariantOutputColor(GrInitInvariantOutput* out) const {
+    // When this is called on a batch, there is only one geometry bundle
+    if (this->hasColors()) {
+        out->setUnknownFourComponents();
+    } else {
+        out->setKnownFourComponents(fGeoData[0].fColor);
+    }
+}
+
+void GrDrawVerticesBatch::getInvariantOutputCoverage(GrInitInvariantOutput* out) const {
+    out->setKnownSingleComponent(0xff);
+}
+
+void GrDrawVerticesBatch::initBatchTracker(const GrPipelineInfo& init) {
+    // Handle any color overrides
+    if (!init.readsColor()) {
+        fGeoData[0].fColor = GrColor_ILLEGAL;
+    }
+    init.getOverrideColorIfSet(&fGeoData[0].fColor);
+
+    // setup batch properties
+    fBatch.fColorIgnored = !init.readsColor();
+    fBatch.fColor = fGeoData[0].fColor;
+    fBatch.fUsesLocalCoords = init.readsLocalCoords();
+    fBatch.fCoverageIgnored = !init.readsCoverage();
+}
+
+void GrDrawVerticesBatch::generateGeometry(GrBatchTarget* batchTarget) {
+    int colorOffset = -1, texOffset = -1;
+    SkAutoTUnref<const GrGeometryProcessor> gp(
+            set_vertex_attributes(this->hasLocalCoords(), this->hasColors(), &colorOffset,
+                                  &texOffset, this->color(), this->viewMatrix(),
+                                  this->coverageIgnored()));
+
+    batchTarget->initDraw(gp, this->pipeline());
+
+    size_t vertexStride = gp->getVertexStride();
+
+    SkASSERT(vertexStride == sizeof(SkPoint) + (this->hasLocalCoords() ? sizeof(SkPoint) : 0)
+                                             + (this->hasColors() ? sizeof(GrColor) : 0));
+
+    int instanceCount = fGeoData.count();
+
+    const GrVertexBuffer* vertexBuffer;
+    int firstVertex;
+
+    void* verts = batchTarget->makeVertSpace(vertexStride, this->vertexCount(),
+                                             &vertexBuffer, &firstVertex);
+
+    if (!verts) {
+        SkDebugf("Could not allocate vertices\n");
+        return;
+    }
+
+    const GrIndexBuffer* indexBuffer = NULL;
+    int firstIndex = 0;
+
+    uint16_t* indices = NULL;
+    if (this->hasIndices()) {
+        indices = batchTarget->makeIndexSpace(this->indexCount(), &indexBuffer, &firstIndex);
+
+        if (!indices) {
+            SkDebugf("Could not allocate indices\n");
+            return;
+        }
+    }
+
+    int indexOffset = 0;
+    int vertexOffset = 0;
+    for (int i = 0; i < instanceCount; i++) {
+        const Geometry& args = fGeoData[i];
+
+        // TODO we can actually cache this interleaved and then just memcopy
+        if (this->hasIndices()) {
+            for (int j = 0; j < args.fIndices.count(); ++j, ++indexOffset) {
+                *(indices + indexOffset) = args.fIndices[j] + vertexOffset;
+            }
+        }
+
+        for (int j = 0; j < args.fPositions.count(); ++j) {
+            *((SkPoint*)verts) = args.fPositions[j];
+            if (this->hasColors()) {
+                *(GrColor*)((intptr_t)verts + colorOffset) = args.fColors[j];
+            }
+            if (this->hasLocalCoords()) {
+                *(SkPoint*)((intptr_t)verts + texOffset) = args.fLocalCoords[j];
+            }
+            verts = (void*)((intptr_t)verts + vertexStride);
+            vertexOffset++;
+        }
+    }
+
+    GrVertices vertices;
+    if (this->hasIndices()) {
+        vertices.initIndexed(this->primitiveType(), vertexBuffer, indexBuffer, firstVertex,
+                             firstIndex, this->vertexCount(), this->indexCount());
+
+    } else {
+        vertices.init(this->primitiveType(), vertexBuffer, firstVertex, this->vertexCount());
+    }
+    batchTarget->draw(vertices);
+}
+
+bool GrDrawVerticesBatch::onCombineIfPossible(GrBatch* t) {
+    if (!this->pipeline()->isEqual(*t->pipeline())) {
+        return false;
+    }
+
+    GrDrawVerticesBatch* that = t->cast<GrDrawVerticesBatch>();
+
+    if (!this->batchablePrimitiveType() || this->primitiveType() != that->primitiveType()) {
+        return false;
+    }
+
+    SkASSERT(this->usesLocalCoords() == that->usesLocalCoords());
+
+    // We currently use a uniform viewmatrix for this batch
+    if (!this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
+        return false;
+    }
+
+    if (this->hasColors() != that->hasColors()) {
+        return false;
+    }
+
+    if (this->hasIndices() != that->hasIndices()) {
+        return false;
+    }
+
+    if (this->hasLocalCoords() != that->hasLocalCoords()) {
+        return false;
+    }
+
+    if (!this->hasColors() && this->color() != that->color()) {
+        return false;
+    }
+
+    if (this->color() != that->color()) {
+        fBatch.fColor = GrColor_ILLEGAL;
+    }
+    fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin());
+    fBatch.fVertexCount += that->vertexCount();
+    fBatch.fIndexCount += that->indexCount();
+
+    this->joinBounds(that->bounds());
+    return true;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifdef GR_TEST_UTILS
+
+#include "GrBatchTest.h"
+
+static uint32_t seed_vertices(GrPrimitiveType type) {
+    switch (type) {
+        case kTriangles_GrPrimitiveType:
+        case kTriangleStrip_GrPrimitiveType:
+        case kTriangleFan_GrPrimitiveType:
+            return 3;
+        case kPoints_GrPrimitiveType:
+            return 1;
+        case kLines_GrPrimitiveType:
+        case kLineStrip_GrPrimitiveType:
+            return 2;
+    }
+    SkFAIL("Incomplete switch\n");
+    return 0;
+}
+
+static uint32_t primitive_vertices(GrPrimitiveType type) {
+    switch (type) {
+        case kTriangles_GrPrimitiveType:
+            return 3;
+        case kLines_GrPrimitiveType:
+            return 2;
+        case kTriangleStrip_GrPrimitiveType:
+        case kTriangleFan_GrPrimitiveType:
+        case kPoints_GrPrimitiveType:
+        case kLineStrip_GrPrimitiveType:
+            return 1;
+    }
+    SkFAIL("Incomplete switch\n");
+    return 0;
+}
+
+static SkPoint random_point(SkRandom* random, SkScalar min, SkScalar max) {
+    SkPoint p;
+    p.fX = random->nextRangeScalar(min, max);
+    p.fY = random->nextRangeScalar(min, max);
+    return p;
+}
+
+static void randomize_params(size_t count, size_t maxVertex, SkScalar min, SkScalar max,
+                             SkRandom* random,
+                             SkTArray<SkPoint>* positions,
+                             SkTArray<SkPoint>* texCoords, bool hasTexCoords,
+                             SkTArray<GrColor>* colors, bool hasColors,
+                             SkTArray<uint16_t>* indices, bool hasIndices) {
+    for (uint32_t v = 0; v < count; v++) {
+        positions->push_back(random_point(random, min, max));
+        if (hasTexCoords) {
+            texCoords->push_back(random_point(random, min, max));
+        }
+        if (hasColors) {
+            colors->push_back(GrRandomColor(random));
+        }
+        if (hasIndices) {
+            SkASSERT(maxVertex <= SK_MaxU16);
+            indices->push_back(random->nextULessThan((uint16_t)maxVertex));
+        }
+    }
+}
+
+BATCH_TEST_DEFINE(VerticesBatch) {
+    GrPrimitiveType type = GrPrimitiveType(random->nextULessThan(kLast_GrPrimitiveType + 1));
+    uint32_t primitiveCount = random->nextRangeU(1, 100);
+
+    // TODO make 'sensible' indexbuffers
+    SkTArray<SkPoint> positions;
+    SkTArray<SkPoint> texCoords;
+    SkTArray<GrColor> colors;
+    SkTArray<uint16_t> indices;
+
+    bool hasTexCoords = random->nextBool();
+    bool hasIndices = random->nextBool();
+    bool hasColors = random->nextBool();
+
+    uint32_t vertexCount = seed_vertices(type) + (primitiveCount - 1) * primitive_vertices(type);
+
+    static const SkScalar kMinVertExtent = -100.f;
+    static const SkScalar kMaxVertExtent = 100.f;
+    randomize_params(seed_vertices(type), vertexCount, kMinVertExtent, kMaxVertExtent,
+                     random,
+                     &positions,
+                     &texCoords, hasTexCoords,
+                     &colors, hasColors,
+                     &indices, hasIndices);
+
+    for (uint32_t i = 1; i < primitiveCount; i++) {
+        randomize_params(primitive_vertices(type), vertexCount, kMinVertExtent, kMaxVertExtent,
+                         random,
+                         &positions,
+                         &texCoords, hasTexCoords,
+                         &colors, hasColors,
+                         &indices, hasIndices);
+    }
+
+    SkMatrix viewMatrix = GrTest::TestMatrix(random);
+    SkRect bounds;
+    SkDEBUGCODE(bool result = ) bounds.setBoundsCheck(positions.begin(), vertexCount);
+    SkASSERT(result);
+
+    viewMatrix.mapRect(&bounds);
+
+    GrDrawVerticesBatch::Geometry geometry;
+    geometry.fColor = GrRandomColor(random);
+    return GrDrawVerticesBatch::Create(geometry, type, viewMatrix,
+                                       positions.begin(), vertexCount,
+                                       indices.begin(), hasIndices ? vertexCount : 0,
+                                       colors.begin(),
+                                       texCoords.begin(),
+                                       bounds);
+}
+
+#endif