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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 "GrDrawAtlasBatch.h"
#include "GrBatchTest.h"
#include "SkRandom.h"
void GrDrawAtlasBatch::initBatchTracker(const GrPipelineInfo& init) {
// Handle any color overrides
if (!init.readsColor()) {
fGeoData[0].fColor = GrColor_ILLEGAL;
}
init.getOverrideColorIfSet(&fGeoData[0].fColor);
// setup batch properties
fColorIgnored = !init.readsColor();
fColor = fGeoData[0].fColor;
// We'd like to assert this, but we can't because of GLPrograms test
//SkASSERT(init.readsLocalCoords());
fCoverageIgnored = !init.readsCoverage();
}
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);
}
void GrDrawAtlasBatch::generateGeometry(GrBatchTarget* batchTarget) {
int colorOffset = -1, texOffset = -1;
// Setup geometry processor
SkAutoTUnref<const GrGeometryProcessor> gp(
set_vertex_attributes(true, this->hasColors(), &colorOffset,
&texOffset, this->color(), this->viewMatrix(),
this->coverageIgnored()));
batchTarget->initDraw(gp, this->pipeline());
int instanceCount = fGeoData.count();
size_t vertexStride = gp->getVertexStride();
SkASSERT(vertexStride == sizeof(SkPoint) + sizeof(SkPoint)
+ (this->hasColors() ? sizeof(GrColor) : 0));
QuadHelper helper;
int numQuads = this->vertexCount()/4;
void* verts = helper.init(batchTarget, vertexStride, numQuads);
if (!verts) {
SkDebugf("Could not allocate vertices\n");
return;
}
int vertexOffset = 0;
for (int i = 0; i < instanceCount; i++) {
const Geometry& args = fGeoData[i];
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];
}
*(SkPoint*)((intptr_t)verts + texOffset) = args.fLocalCoords[j];
verts = (void*)((intptr_t)verts + vertexStride);
vertexOffset++;
}
}
helper.issueDraw(batchTarget);
}
GrDrawAtlasBatch::GrDrawAtlasBatch(const Geometry& geometry, const SkMatrix& viewMatrix,
const SkPoint* positions, int vertexCount,
const GrColor* colors, const SkPoint* localCoords,
const SkRect& bounds) {
this->initClassID<GrDrawAtlasBatch>();
SkASSERT(positions);
SkASSERT(localCoords);
fViewMatrix = viewMatrix;
Geometry& installedGeo = fGeoData.push_back(geometry);
installedGeo.fPositions.append(vertexCount, positions);
if (colors) {
installedGeo.fColors.append(vertexCount, colors);
fHasColors = true;
} else {
fHasColors = false;
}
installedGeo.fLocalCoords.append(vertexCount, localCoords);
fVertexCount = vertexCount;
this->setBounds(bounds);
}
bool GrDrawAtlasBatch::onCombineIfPossible(GrBatch* t) {
if (!this->pipeline()->isEqual(*t->pipeline())) {
return false;
}
GrDrawAtlasBatch* that = t->cast<GrDrawAtlasBatch>();
// 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->hasColors() && this->color() != that->color()) {
return false;
}
if (this->color() != that->color()) {
fColor = GrColor_ILLEGAL;
}
fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin());
fVertexCount += that->vertexCount();
this->joinBounds(that->bounds());
return true;
}
#ifdef GR_TEST_UTILS
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, SkScalar min, SkScalar max,
SkRandom* random,
SkTArray<SkPoint>* positions,
SkTArray<SkPoint>* texCoords,
SkTArray<GrColor>* colors, bool hasColors) {
for (uint32_t v = 0; v < count; v++) {
positions->push_back(random_point(random, min, max));
texCoords->push_back(random_point(random, min, max));
if (hasColors) {
colors->push_back(GrRandomColor(random));
}
}
}
BATCH_TEST_DEFINE(GrDrawAtlasBatch) {
uint32_t spriteCount = random->nextRangeU(1, 100);
// TODO make 'sensible' indexbuffers
SkTArray<SkPoint> positions;
SkTArray<SkPoint> texCoords;
SkTArray<GrColor> colors;
bool hasColors = random->nextBool();
uint32_t vertexCount = 4*spriteCount;
static const SkScalar kMinVertExtent = -100.f;
static const SkScalar kMaxVertExtent = 100.f;
randomize_params(vertexCount, kMinVertExtent, kMaxVertExtent,
random,
&positions,
&texCoords,
&colors, hasColors);
SkMatrix viewMatrix = GrTest::TestMatrix(random);
SkRect bounds;
SkDEBUGCODE(bool result = ) bounds.setBoundsCheck(positions.begin(), vertexCount);
SkASSERT(result);
viewMatrix.mapRect(&bounds);
GrDrawAtlasBatch::Geometry geometry;
geometry.fColor = GrRandomColor(random);
return GrDrawAtlasBatch::Create(geometry, viewMatrix,
positions.begin(), vertexCount,
colors.begin(),
texCoords.begin(),
bounds);
}
#endif
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