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/*
* 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 "GrBatchFlushState.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)
: INHERITED(ClassID()) {
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 GrPipelineOptimizations& opt) {
// 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();
}
void GrDrawVerticesBatch::onPrepareDraws(Target* target) {
int colorOffset = -1, texOffset = -1;
SkAutoTUnref<const GrGeometryProcessor> gp(
set_vertex_attributes(this->hasLocalCoords(), this->hasColors(), &colorOffset,
&texOffset, this->color(), this->viewMatrix(),
this->coverageIgnored()));
target->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 = target->makeVertexSpace(vertexStride, this->vertexCount(),
&vertexBuffer, &firstVertex);
if (!verts) {
SkDebugf("Could not allocate vertices\n");
return;
}
const GrIndexBuffer* indexBuffer = nullptr;
int firstIndex = 0;
uint16_t* indices = nullptr;
if (this->hasIndices()) {
indices = target->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());
}
target->draw(vertices);
}
bool GrDrawVerticesBatch::onCombineIfPossible(GrBatch* t, const GrCaps& caps) {
GrDrawVerticesBatch* that = t->cast<GrDrawVerticesBatch>();
if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pipeline(),
that->bounds(), caps)) {
return false;
}
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));
}
}
}
DRAW_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
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