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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 "GrLatticeOp.h"
#include "GrDefaultGeoProcFactory.h"
#include "GrMeshDrawOp.h"
#include "GrOpFlushState.h"
#include "GrResourceProvider.h"
#include "SkBitmap.h"
#include "SkLatticeIter.h"
#include "SkRect.h"
static sk_sp<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::Make(color, coverage, localCoords, SkMatrix::I());
}
class NonAALatticeOp final : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
static const int kVertsPerRect = 4;
static const int kIndicesPerRect = 6;
NonAALatticeOp(GrColor color, const SkMatrix& viewMatrix, int imageWidth, int imageHeight,
std::unique_ptr<SkLatticeIter> iter, const SkRect& dst)
: INHERITED(ClassID()) {
Patch& patch = fPatches.push_back();
patch.fViewMatrix = viewMatrix;
patch.fColor = color;
patch.fIter = std::move(iter);
patch.fDst = dst;
fImageWidth = imageWidth;
fImageHeight = imageHeight;
// setup bounds
this->setTransformedBounds(patch.fDst, viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
}
const char* name() const override { return "NonAALatticeOp"; }
SkString dumpInfo() const override {
SkString str;
for (int i = 0; i < fPatches.count(); ++i) {
str.appendf("%d: Color: 0x%08x Dst [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n", i,
fPatches[i].fColor, fPatches[i].fDst.fLeft, fPatches[i].fDst.fTop,
fPatches[i].fDst.fRight, fPatches[i].fDst.fBottom);
}
str.append(DumpPipelineInfo(*this->pipeline()));
str.append(INHERITED::dumpInfo());
return str;
}
void computePipelineOptimizations(GrInitInvariantOutput* color,
GrInitInvariantOutput* coverage,
GrBatchToXPOverrides* overrides) const override {
color->setUnknownFourComponents();
coverage->setKnownSingleComponent(0xff);
}
private:
void onPrepareDraws(Target* target) const override {
sk_sp<GrGeometryProcessor> gp(create_gp(fOverrides.readsCoverage()));
if (!gp) {
SkDebugf("Couldn't create GrGeometryProcessor\n");
return;
}
size_t vertexStride = gp->getVertexStride();
int patchCnt = fPatches.count();
int numRects = 0;
for (int i = 0; i < patchCnt; i++) {
numRects += fPatches[i].fIter->numRectsToDraw();
}
sk_sp<const GrBuffer> indexBuffer(target->resourceProvider()->refQuadIndexBuffer());
InstancedHelper helper;
void* vertices = helper.init(target, kTriangles_GrPrimitiveType, vertexStride,
indexBuffer.get(), kVertsPerRect, kIndicesPerRect, numRects);
if (!vertices || !indexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
intptr_t verts = reinterpret_cast<intptr_t>(vertices);
for (int i = 0; i < patchCnt; i++) {
const Patch& patch = fPatches[i];
// Apply the view matrix here if it is scale-translate. Otherwise, we need to
// wait until we've created the dst rects.
bool isScaleTranslate = patch.fViewMatrix.isScaleTranslate();
if (isScaleTranslate) {
patch.fIter->mapDstScaleTranslate(patch.fViewMatrix);
}
SkRect srcR, dstR;
intptr_t patchVerts = verts;
while (patch.fIter->next(&srcR, &dstR)) {
SkPoint* positions = reinterpret_cast<SkPoint*>(verts);
positions->setRectFan(dstR.fLeft, dstR.fTop, dstR.fRight, dstR.fBottom,
vertexStride);
// 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 = patch.fColor;
vertColor = (GrColor*)((intptr_t)vertColor + vertexStride);
}
verts += kVertsPerRect * vertexStride;
}
// If we didn't handle it above, apply the matrix here.
if (!isScaleTranslate) {
SkPoint* positions = reinterpret_cast<SkPoint*>(patchVerts);
patch.fViewMatrix.mapPointsWithStride(
positions, vertexStride, kVertsPerRect * patch.fIter->numRectsToDraw());
}
}
helper.recordDraw(target, gp.get());
}
void initBatchTracker(const GrXPOverridesForBatch& overrides) override {
overrides.getOverrideColorIfSet(&fPatches[0].fColor);
fOverrides = overrides;
}
bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
NonAALatticeOp* that = t->cast<NonAALatticeOp>();
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 ops, one who can tweak, one who cannot, we just fall back to not
// tweaking.
if (fOverrides.canTweakAlphaForCoverage() && !that->fOverrides.canTweakAlphaForCoverage()) {
fOverrides = that->fOverrides;
}
fPatches.move_back_n(that->fPatches.count(), that->fPatches.begin());
this->joinBounds(*that);
return true;
}
struct Patch {
SkMatrix fViewMatrix;
std::unique_ptr<SkLatticeIter> fIter;
SkRect fDst;
GrColor fColor;
};
GrXPOverridesForBatch fOverrides;
int fImageWidth;
int fImageHeight;
SkSTArray<1, Patch, true> fPatches;
typedef GrMeshDrawOp INHERITED;
};
namespace GrLatticeOp {
sk_sp<GrDrawOp> MakeNonAA(GrColor color, const SkMatrix& viewMatrix, int imageWidth,
int imageHeight, std::unique_ptr<SkLatticeIter> iter, const SkRect& dst) {
return sk_sp<GrDrawOp>(
new NonAALatticeOp(color, viewMatrix, imageWidth, imageHeight, std::move(iter), dst));
}
};
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