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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 "GrNinePatch.h"
#include "GrBatchFlushState.h"
#include "GrDefaultGeoProcFactory.h"
#include "GrResourceProvider.h"
#include "GrVertexBatch.h"
#include "SkBitmap.h"
#include "SkNinePatchIter.h"
#include "SkRect.h"
static const GrGeometryProcessor* create_gp(bool readsCoverage) {
using namespace GrDefaultGeoProcFactory;
Color color(Color::kAttribute_Type);
Coverage coverage(readsCoverage ? Coverage::kSolid_Type : Coverage::kNone_Type);
LocalCoords localCoords(LocalCoords::kHasExplicit_Type);
return GrDefaultGeoProcFactory::Create(color, coverage, localCoords, SkMatrix::I());
}
class GrNonAANinePatchBatch : public GrVertexBatch {
public:
DEFINE_BATCH_CLASS_ID
static const int kVertsPerRect = 4;
static const int kIndicesPerRect = 6;
static const int kRectsPerInstance = 9; // We could skip empty rects
struct Geometry {
SkMatrix fViewMatrix;
SkIRect fCenter;
SkRect fDst;
GrColor fColor;
};
GrNonAANinePatchBatch(GrColor color, const SkMatrix& viewMatrix, int imageWidth,
int imageHeight, const SkIRect& center, const SkRect &dst)
: INHERITED(ClassID()) {
Geometry& geo = fGeoData.push_back();
geo.fViewMatrix = viewMatrix;
geo.fColor = color;
geo.fCenter = center;
geo.fDst = dst;
fImageWidth = imageWidth;
fImageHeight = imageHeight;
// setup bounds
geo.fViewMatrix.mapRect(&fBounds, geo.fDst);
}
const char* name() const override { return "NonAANinePatchBatch"; }
SkString dumpInfo() const override {
SkString str;
for (int i = 0; i < fGeoData.count(); ++i) {
str.appendf("%d: Color: 0x%08x Center [L: %d, T: %d, R: %d, B: %d], "
"Dst [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n",
i,
fGeoData[i].fColor,
fGeoData[i].fCenter.fLeft, fGeoData[i].fCenter.fTop,
fGeoData[i].fCenter.fRight, fGeoData[i].fCenter.fBottom,
fGeoData[i].fDst.fLeft, fGeoData[i].fDst.fTop,
fGeoData[i].fDst.fRight, fGeoData[i].fDst.fBottom);
}
str.append(INHERITED::dumpInfo());
return str;
}
void computePipelineOptimizations(GrInitInvariantOutput* color,
GrInitInvariantOutput* coverage,
GrBatchToXPOverrides* overrides) const override {
color->setUnknownFourComponents();
coverage->setKnownSingleComponent(0xff);
}
SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
private:
void onPrepareDraws(Target* target) const override {
SkAutoTUnref<const GrGeometryProcessor> gp(create_gp(fOverrides.readsCoverage()));
if (!gp) {
SkDebugf("Couldn't create GrGeometryProcessor\n");
return;
}
target->initDraw(gp);
size_t vertexStride = gp->getVertexStride();
int instanceCount = fGeoData.count();
SkAutoTUnref<const GrBuffer> indexBuffer(
target->resourceProvider()->refQuadIndexBuffer());
InstancedHelper helper;
void* vertices = helper.init(target, kTriangles_GrPrimitiveType, vertexStride,
indexBuffer, kVertsPerRect,
kIndicesPerRect, instanceCount * kRectsPerInstance);
if (!vertices || !indexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
for (int i = 0; i < instanceCount; i++) {
intptr_t verts = reinterpret_cast<intptr_t>(vertices) +
i * kRectsPerInstance * kVertsPerRect * vertexStride;
const Geometry& geo = fGeoData[i];
SkNinePatchIter iter(fImageWidth, fImageHeight, geo.fCenter, geo.fDst);
SkRect srcR, dstR;
while (iter.next(&srcR, &dstR)) {
SkPoint* positions = reinterpret_cast<SkPoint*>(verts);
positions->setRectFan(dstR.fLeft, dstR.fTop,
dstR.fRight, dstR.fBottom, vertexStride);
SkASSERT(!geo.fViewMatrix.hasPerspective());
geo.fViewMatrix.mapPointsWithStride(positions, vertexStride, kVertsPerRect);
// Setup local coords
static const int kLocalOffset = sizeof(SkPoint) + sizeof(GrColor);
SkPoint* coords = reinterpret_cast<SkPoint*>(verts + kLocalOffset);
coords->setRectFan(srcR.fLeft, srcR.fTop, srcR.fRight, srcR.fBottom, vertexStride);
static const int kColorOffset = sizeof(SkPoint);
GrColor* vertColor = reinterpret_cast<GrColor*>(verts + kColorOffset);
for (int j = 0; j < 4; ++j) {
*vertColor = geo.fColor;
vertColor = (GrColor*) ((intptr_t) vertColor + vertexStride);
}
verts += kVertsPerRect * vertexStride;
}
}
helper.recordDraw(target);
}
void initBatchTracker(const GrXPOverridesForBatch& overrides) override {
overrides.getOverrideColorIfSet(&fGeoData[0].fColor);
fOverrides = overrides;
}
bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override {
GrNonAANinePatchBatch* that = t->cast<GrNonAANinePatchBatch>();
if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pipeline(),
that->bounds(), caps)) {
return false;
}
SkASSERT(this->fImageWidth == that->fImageWidth &&
this->fImageHeight == that->fImageHeight);
// In the event of two batches, one who can tweak, one who cannot, we just fall back to
// not tweaking
if (fOverrides.canTweakAlphaForCoverage() && !that->fOverrides.canTweakAlphaForCoverage()) {
fOverrides = that->fOverrides;
}
fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin());
this->joinBounds(that->bounds());
return true;
}
GrXPOverridesForBatch fOverrides;
int fImageWidth;
int fImageHeight;
SkSTArray<1, Geometry, true> fGeoData;
typedef GrVertexBatch INHERITED;
};
namespace GrNinePatch {
GrDrawBatch* CreateNonAA(GrColor color, const SkMatrix& viewMatrix, int imageWidth, int imageHeight,
const SkIRect& center, const SkRect& dst) {
return new GrNonAANinePatchBatch(color, viewMatrix, imageWidth, imageHeight, center, dst);
}
};
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