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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrRegionOp.h"
#include <GrDrawOpTest.h>
#include "GrDefaultGeoProcFactory.h"
#include "GrMeshDrawOp.h"
#include "GrOpFlushState.h"
#include "GrResourceProvider.h"
#include "GrSimpleMeshDrawOpHelper.h"
#include "SkMatrixPriv.h"
#include "SkPointPriv.h"
#include "SkRegion.h"
static const int kVertsPerInstance = 4;
static const int kIndicesPerInstance = 6;
static sk_sp<GrGeometryProcessor> make_gp(const SkMatrix& viewMatrix) {
using namespace GrDefaultGeoProcFactory;
return GrDefaultGeoProcFactory::Make(Color::kPremulGrColorAttribute_Type, Coverage::kSolid_Type,
LocalCoords::kUsePosition_Type, viewMatrix);
}
static void tesselate_region(intptr_t vertices,
size_t vertexStride,
GrColor color,
const SkRegion& region) {
SkRegion::Iterator iter(region);
intptr_t verts = vertices;
while (!iter.done()) {
SkRect rect = SkRect::Make(iter.rect());
SkPoint* position = (SkPoint*)verts;
SkPointPriv::SetRectTriStrip(position, rect, vertexStride);
static const int kColorOffset = sizeof(SkPoint);
GrColor* vertColor = reinterpret_cast<GrColor*>(verts + kColorOffset);
for (int i = 0; i < kVertsPerInstance; i++) {
*vertColor = color;
vertColor = (GrColor*)((intptr_t)vertColor + vertexStride);
}
verts += vertexStride * kVertsPerInstance;
iter.next();
}
}
namespace {
class RegionOp final : public GrMeshDrawOp {
private:
using Helper = GrSimpleMeshDrawOpHelperWithStencil;
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(GrContext* context,
GrPaint&& paint,
const SkMatrix& viewMatrix,
const SkRegion& region,
GrAAType aaType,
const GrUserStencilSettings* stencilSettings = nullptr) {
return Helper::FactoryHelper<RegionOp>(context, std::move(paint), viewMatrix, region,
aaType, stencilSettings);
}
RegionOp(const Helper::MakeArgs& helperArgs, GrColor color, const SkMatrix& viewMatrix,
const SkRegion& region, GrAAType aaType, const GrUserStencilSettings* stencilSettings)
: INHERITED(ClassID())
, fHelper(helperArgs, aaType, stencilSettings)
, fViewMatrix(viewMatrix) {
RegionInfo& info = fRegions.push_back();
info.fColor = color;
info.fRegion = region;
SkRect bounds = SkRect::Make(region.getBounds());
this->setTransformedBounds(bounds, viewMatrix, HasAABloat::kNo, IsZeroArea::kNo);
}
const char* name() const override { return "GrRegionOp"; }
void visitProxies(const VisitProxyFunc& func) const override {
fHelper.visitProxies(func);
}
SkString dumpInfo() const override {
SkString str;
str.appendf("# combined: %d\n", fRegions.count());
for (int i = 0; i < fRegions.count(); ++i) {
const RegionInfo& info = fRegions[i];
str.appendf("%d: Color: 0x%08x, Region with %d rects\n", i, info.fColor,
info.fRegion.computeRegionComplexity());
}
str += fHelper.dumpInfo();
str += INHERITED::dumpInfo();
return str;
}
FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); }
RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip) override {
return fHelper.xpRequiresDstTexture(caps, clip, GrProcessorAnalysisCoverage::kNone,
&fRegions[0].fColor);
}
private:
void onPrepareDraws(Target* target) override {
sk_sp<GrGeometryProcessor> gp = make_gp(fViewMatrix);
if (!gp) {
SkDebugf("Couldn't create GrGeometryProcessor\n");
return;
}
static constexpr size_t kVertexStride = sizeof(GrDefaultGeoProcFactory::PositionColorAttr);
SkASSERT(kVertexStride == gp->debugOnly_vertexStride());
int numRegions = fRegions.count();
int numRects = 0;
for (int i = 0; i < numRegions; i++) {
numRects += fRegions[i].fRegion.computeRegionComplexity();
}
if (!numRects) {
return;
}
sk_sp<const GrBuffer> indexBuffer = target->resourceProvider()->refQuadIndexBuffer();
PatternHelper helper(GrPrimitiveType::kTriangles);
void* vertices = helper.init(target, kVertexStride, indexBuffer.get(), kVertsPerInstance,
kIndicesPerInstance, numRects);
if (!vertices || !indexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
intptr_t verts = reinterpret_cast<intptr_t>(vertices);
for (int i = 0; i < numRegions; i++) {
tesselate_region(verts, kVertexStride, fRegions[i].fColor, fRegions[i].fRegion);
int numRectsInRegion = fRegions[i].fRegion.computeRegionComplexity();
verts += numRectsInRegion * kVertsPerInstance * kVertexStride;
}
auto pipe = fHelper.makePipeline(target);
helper.recordDraw(target, gp.get(), pipe.fPipeline, pipe.fFixedDynamicState);
}
bool onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
RegionOp* that = t->cast<RegionOp>();
if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) {
return false;
}
if (fViewMatrix != that->fViewMatrix) {
return false;
}
fRegions.push_back_n(that->fRegions.count(), that->fRegions.begin());
this->joinBounds(*that);
return true;
}
struct RegionInfo {
GrColor fColor;
SkRegion fRegion;
};
Helper fHelper;
SkMatrix fViewMatrix;
SkSTArray<1, RegionInfo, true> fRegions;
typedef GrMeshDrawOp INHERITED;
};
} // anonymous namespace
namespace GrRegionOp {
std::unique_ptr<GrDrawOp> Make(GrContext* context,
GrPaint&& paint,
const SkMatrix& viewMatrix,
const SkRegion& region,
GrAAType aaType,
const GrUserStencilSettings* stencilSettings) {
if (aaType != GrAAType::kNone && aaType != GrAAType::kMSAA) {
return nullptr;
}
return RegionOp::Make(context, std::move(paint), viewMatrix, region, aaType, stencilSettings);
}
}
#if GR_TEST_UTILS
GR_DRAW_OP_TEST_DEFINE(RegionOp) {
SkRegion region;
int n = random->nextULessThan(200);
for (int i = 0; i < n; ++i) {
SkIPoint center;
center.fX = random->nextULessThan(1000);
center.fY = random->nextULessThan(1000);
int w = random->nextRangeU(10, 1000);
int h = random->nextRangeU(10, 1000);
SkIRect rect = {center.fX - w / 2, center.fY - h / 2, center.fX + w / 2, center.fY + h / 2};
SkRegion::Op op;
if (i == 0) {
op = SkRegion::kReplace_Op;
} else {
// Pick an other than replace.
GR_STATIC_ASSERT(SkRegion::kLastOp == SkRegion::kReplace_Op);
op = (SkRegion::Op)random->nextULessThan(SkRegion::kLastOp);
}
region.op(rect, op);
}
SkMatrix viewMatrix = GrTest::TestMatrix(random);
GrAAType aaType = GrAAType::kNone;
if (GrFSAAType::kUnifiedMSAA == fsaaType && random->nextBool()) {
aaType = GrAAType::kMSAA;
}
return RegionOp::Make(context, std::move(paint), viewMatrix, region, aaType,
GrGetRandomStencil(random, context));
}
#endif
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