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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 "GrNonAAFillRectOp.h"
#include "GrColor.h"
#include "GrDefaultGeoProcFactory.h"
#include "GrMeshDrawOp.h"
#include "GrOpFlushState.h"
#include "GrPrimitiveProcessor.h"
#include "GrQuad.h"
#include "GrResourceProvider.h"
#include "SkMatrixPriv.h"
static const int kVertsPerInstance = 4;
static const int kIndicesPerInstance = 6;
/** We always use per-vertex colors so that rects can be combined across color changes. Sometimes
we have explicit local coords and sometimes not. We *could* always provide explicit local
coords and just duplicate the positions when the caller hasn't provided a local coord rect,
but we haven't seen a use case which frequently switches between local rect and no local
rect draws.
The vertex attrib order is always pos, color, [local coords].
*/
static sk_sp<GrGeometryProcessor> make_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());
}
static void tesselate(intptr_t vertices,
size_t vertexStride,
GrColor color,
const SkMatrix* viewMatrix,
const SkRect& rect,
const GrQuad* localQuad) {
SkPoint* positions = reinterpret_cast<SkPoint*>(vertices);
positions->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, vertexStride);
if (viewMatrix) {
SkMatrixPriv::MapPointsWithStride(*viewMatrix, positions, vertexStride, kVertsPerInstance);
}
// Setup local coords
// TODO we should only do this if local coords are being read
if (localQuad) {
static const int kLocalOffset = sizeof(SkPoint) + sizeof(GrColor);
for (int i = 0; i < kVertsPerInstance; i++) {
SkPoint* coords =
reinterpret_cast<SkPoint*>(vertices + kLocalOffset + i * vertexStride);
*coords = localQuad->point(i);
}
}
static const int kColorOffset = sizeof(SkPoint);
GrColor* vertColor = reinterpret_cast<GrColor*>(vertices + kColorOffset);
for (int j = 0; j < 4; ++j) {
*vertColor = color;
vertColor = (GrColor*)((intptr_t)vertColor + vertexStride);
}
}
class NonAAFillRectOp final : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
NonAAFillRectOp(GrColor color, const SkMatrix& viewMatrix, const SkRect& rect,
const SkRect* localRect, const SkMatrix* localMatrix)
: INHERITED(ClassID()) {
SkASSERT(!viewMatrix.hasPerspective() && (!localMatrix || !localMatrix->hasPerspective()));
RectInfo& info = fRects.push_back();
info.fColor = color;
info.fViewMatrix = viewMatrix;
info.fRect = rect;
if (localRect && localMatrix) {
info.fLocalQuad.setFromMappedRect(*localRect, *localMatrix);
} else if (localRect) {
info.fLocalQuad.set(*localRect);
} else if (localMatrix) {
info.fLocalQuad.setFromMappedRect(rect, *localMatrix);
} else {
info.fLocalQuad.set(rect);
}
this->setTransformedBounds(fRects[0].fRect, viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
}
const char* name() const override { return "NonAAFillRectOp"; }
SkString dumpInfo() const override {
SkString str;
str.appendf("# combined: %d\n", fRects.count());
for (int i = 0; i < fRects.count(); ++i) {
const RectInfo& info = fRects[i];
str.appendf("%d: Color: 0x%08x, Rect [L: %.2f, T: %.2f, R: %.2f, B: %.2f]\n", i,
info.fColor, info.fRect.fLeft, info.fRect.fTop, info.fRect.fRight,
info.fRect.fBottom);
}
str.append(DumpPipelineInfo(*this->pipeline()));
str.append(INHERITED::dumpInfo());
return str;
}
private:
NonAAFillRectOp() : INHERITED(ClassID()) {}
void getPipelineAnalysisInput(GrPipelineAnalysisDrawOpInput* input) const override {
input->pipelineColorInput()->setKnownFourComponents(fRects[0].fColor);
input->pipelineCoverageInput()->setKnownSingleComponent(0xff);
}
void applyPipelineOptimizations(const GrPipelineOptimizations& optimizations) override {
optimizations.getOverrideColorIfSet(&fRects[0].fColor);
fOptimizations = optimizations;
}
void onPrepareDraws(Target* target) const override {
sk_sp<GrGeometryProcessor> gp = make_gp(fOptimizations.readsCoverage());
if (!gp) {
SkDebugf("Couldn't create GrGeometryProcessor\n");
return;
}
SkASSERT(gp->getVertexStride() ==
sizeof(GrDefaultGeoProcFactory::PositionColorLocalCoordAttr));
size_t vertexStride = gp->getVertexStride();
int instanceCount = fRects.count();
sk_sp<const GrBuffer> indexBuffer(target->resourceProvider()->refQuadIndexBuffer());
InstancedHelper helper;
void* vertices =
helper.init(target, kTriangles_GrPrimitiveType, vertexStride, indexBuffer.get(),
kVertsPerInstance, kIndicesPerInstance, instanceCount);
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 * kVertsPerInstance * vertexStride;
tesselate(verts, vertexStride, fRects[i].fColor, &fRects[i].fViewMatrix,
fRects[i].fRect, &fRects[i].fLocalQuad);
}
helper.recordDraw(target, gp.get());
}
bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
NonAAFillRectOp* that = t->cast<NonAAFillRectOp>();
if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pipeline(),
that->bounds(), caps)) {
return false;
}
// In the event of two ops, one who can tweak, one who cannot, we just fall back to not
// tweaking.
if (fOptimizations.canTweakAlphaForCoverage() &&
!that->fOptimizations.canTweakAlphaForCoverage()) {
fOptimizations = that->fOptimizations;
}
fRects.push_back_n(that->fRects.count(), that->fRects.begin());
this->joinBounds(*that);
return true;
}
struct RectInfo {
GrColor fColor;
SkMatrix fViewMatrix;
SkRect fRect;
GrQuad fLocalQuad;
};
GrPipelineOptimizations fOptimizations;
SkSTArray<1, RectInfo, true> fRects;
typedef GrMeshDrawOp INHERITED;
};
namespace GrNonAAFillRectOp {
sk_sp<GrDrawOp> Make(GrColor color,
const SkMatrix& viewMatrix,
const SkRect& rect,
const SkRect* localRect,
const SkMatrix* localMatrix) {
return sk_sp<GrDrawOp>(new NonAAFillRectOp(color, viewMatrix, rect, localRect, localMatrix));
}
};
///////////////////////////////////////////////////////////////////////////////////////////////////
#ifdef GR_TEST_UTILS
#include "GrDrawOpTest.h"
DRAW_OP_TEST_DEFINE(NonAAFillRectOp) {
GrColor color = GrRandomColor(random);
SkRect rect = GrTest::TestRect(random);
SkRect localRect = GrTest::TestRect(random);
SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random);
SkMatrix localMatrix = GrTest::TestMatrix(random);
bool hasLocalRect = random->nextBool();
bool hasLocalMatrix = random->nextBool();
return GrNonAAFillRectOp::Make(color,
viewMatrix,
rect,
hasLocalRect ? &localRect : nullptr,
hasLocalMatrix ? &localMatrix : nullptr);
}
#endif
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