/*
* Copyright 2014 Google Inc.
* Copyright 2017 ARM Ltd.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrSmallPathRenderer.h"
#include "GrBuffer.h"
#include "GrCaps.h"
#include "GrDistanceFieldGenFromVector.h"
#include "GrDrawOpTest.h"
#include "GrQuad.h"
#include "GrRenderTargetContext.h"
#include "GrResourceProvider.h"
#include "GrSimpleMeshDrawOpHelper.h"
#include "GrVertexWriter.h"
#include "SkAutoMalloc.h"
#include "SkAutoPixmapStorage.h"
#include "SkDistanceFieldGen.h"
#include "SkDraw.h"
#include "SkPaint.h"
#include "SkPointPriv.h"
#include "SkRasterClip.h"
#include "effects/GrBitmapTextGeoProc.h"
#include "effects/GrDistanceFieldGeoProc.h"
#include "ops/GrMeshDrawOp.h"
#define ATLAS_TEXTURE_WIDTH 2048
#define ATLAS_TEXTURE_HEIGHT 2048
#define PLOT_WIDTH 512
#define PLOT_HEIGHT 256
#define NUM_PLOTS_X (ATLAS_TEXTURE_WIDTH / PLOT_WIDTH)
#define NUM_PLOTS_Y (ATLAS_TEXTURE_HEIGHT / PLOT_HEIGHT)
#ifdef DF_PATH_TRACKING
static int g_NumCachedShapes = 0;
static int g_NumFreedShapes = 0;
#endif
// mip levels
static const SkScalar kIdealMinMIP = 12;
static const SkScalar kMaxMIP = 162;
static const SkScalar kMaxDim = 73;
static const SkScalar kMinSize = SK_ScalarHalf;
static const SkScalar kMaxSize = 2*kMaxMIP;
class ShapeDataKey {
public:
ShapeDataKey() {}
ShapeDataKey(const ShapeDataKey& that) { *this = that; }
ShapeDataKey(const GrShape& shape, uint32_t dim) { this->set(shape, dim); }
ShapeDataKey(const GrShape& shape, const SkMatrix& ctm) { this->set(shape, ctm); }
ShapeDataKey& operator=(const ShapeDataKey& that) {
fKey.reset(that.fKey.count());
memcpy(fKey.get(), that.fKey.get(), fKey.count() * sizeof(uint32_t));
return *this;
}
// for SDF paths
void set(const GrShape& shape, uint32_t dim) {
// Shapes' keys are for their pre-style geometry, but by now we shouldn't have any
// relevant styling information.
SkASSERT(shape.style().isSimpleFill());
SkASSERT(shape.hasUnstyledKey());
int shapeKeySize = shape.unstyledKeySize();
fKey.reset(1 + shapeKeySize);
fKey[0] = dim;
shape.writeUnstyledKey(&fKey[1]);
}
// for bitmap paths
void set(const GrShape& shape, const SkMatrix& ctm) {
// Shapes' keys are for their pre-style geometry, but by now we shouldn't have any
// relevant styling information.
SkASSERT(shape.style().isSimpleFill());
SkASSERT(shape.hasUnstyledKey());
// We require the upper left 2x2 of the matrix to match exactly for a cache hit.
SkScalar sx = ctm.get(SkMatrix::kMScaleX);
SkScalar sy = ctm.get(SkMatrix::kMScaleY);
SkScalar kx = ctm.get(SkMatrix::kMSkewX);
SkScalar ky = ctm.get(SkMatrix::kMSkewY);
SkScalar tx = ctm.get(SkMatrix::kMTransX);
SkScalar ty = ctm.get(SkMatrix::kMTransY);
// Allow 8 bits each in x and y of subpixel positioning.
tx -= SkScalarFloorToScalar(tx);
ty -= SkScalarFloorToScalar(ty);
SkFixed fracX = SkScalarToFixed(tx) & 0x0000FF00;
SkFixed fracY = SkScalarToFixed(ty) & 0x0000FF00;
int shapeKeySize = shape.unstyledKeySize();
fKey.reset(5 + shapeKeySize);
fKey[0] = SkFloat2Bits(sx);
fKey[1] = SkFloat2Bits(sy);
fKey[2] = SkFloat2Bits(kx);
fKey[3] = SkFloat2Bits(ky);
fKey[4] = fracX | (fracY >> 8);
shape.writeUnstyledKey(&fKey[5]);
}
bool operator==(const ShapeDataKey& that) const {
return fKey.count() == that.fKey.count() &&
0 == memcmp(fKey.get(), that.fKey.get(), sizeof(uint32_t) * fKey.count());
}
int count32() const { return fKey.count(); }
const uint32_t* data() const { return fKey.get(); }
private:
// The key is composed of the GrShape's key, and either the dimensions of the DF
// generated for the path (32x32 max, 64x64 max, 128x128 max) if an SDF image or
// the matrix for the path with only fractional translation.
SkAutoSTArray<24, uint32_t> fKey;
};
class ShapeData {
public:
ShapeDataKey fKey;
GrDrawOpAtlas::AtlasID fID;
SkRect fBounds;
GrIRect16 fTextureCoords;
SK_DECLARE_INTERNAL_LLIST_INTERFACE(ShapeData);
static inline const ShapeDataKey& GetKey(const ShapeData& data) {
return data.fKey;
}
static inline uint32_t Hash(const ShapeDataKey& key) {
return SkOpts::hash(key.data(), sizeof(uint32_t) * key.count32());
}
};
// Callback to clear out internal path cache when eviction occurs
void GrSmallPathRenderer::HandleEviction(GrDrawOpAtlas::AtlasID id, void* pr) {
GrSmallPathRenderer* dfpr = (GrSmallPathRenderer*)pr;
// remove any paths that use this plot
ShapeDataList::Iter iter;
iter.init(dfpr->fShapeList, ShapeDataList::Iter::kHead_IterStart);
ShapeData* shapeData;
while ((shapeData = iter.get())) {
iter.next();
if (id == shapeData->fID) {
dfpr->fShapeCache.remove(shapeData->fKey);
dfpr->fShapeList.remove(shapeData);
delete shapeData;
#ifdef DF_PATH_TRACKING
++g_NumFreedPaths;
#endif
}
}
}
////////////////////////////////////////////////////////////////////////////////
GrSmallPathRenderer::GrSmallPathRenderer() : fAtlas(nullptr) {}
GrSmallPathRenderer::~GrSmallPathRenderer() {
ShapeDataList::Iter iter;
iter.init(fShapeList, ShapeDataList::Iter::kHead_IterStart);
ShapeData* shapeData;
while ((shapeData = iter.get())) {
iter.next();
delete shapeData;
}
#ifdef DF_PATH_TRACKING
SkDebugf("Cached shapes: %d, freed shapes: %d\n", g_NumCachedShapes, g_NumFreedShapes);
#endif
}
////////////////////////////////////////////////////////////////////////////////
GrPathRenderer::CanDrawPath GrSmallPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const {
if (!args.fCaps->shaderCaps()->shaderDerivativeSupport()) {
return CanDrawPath::kNo;
}
// If the shape has no key then we won't get any reuse.
if (!args.fShape->hasUnstyledKey()) {
return CanDrawPath::kNo;
}
// This only supports filled paths, however, the caller may apply the style to make a filled
// path and try again.
if (!args.fShape->style().isSimpleFill()) {
return CanDrawPath::kNo;
}
// This does non-inverse coverage-based antialiased fills.
if (GrAAType::kCoverage != args.fAAType) {
return CanDrawPath::kNo;
}
// TODO: Support inverse fill
if (args.fShape->inverseFilled()) {
return CanDrawPath::kNo;
}
// Only support paths with bounds within kMaxDim by kMaxDim,
// scaled to have bounds within kMaxSize by kMaxSize.
// The goal is to accelerate rendering of lots of small paths that may be scaling.
SkScalar scaleFactors[2] = { 1, 1 };
if (!args.fViewMatrix->hasPerspective() && !args.fViewMatrix->getMinMaxScales(scaleFactors)) {
return CanDrawPath::kNo;
}
SkRect bounds = args.fShape->styledBounds();
SkScalar minDim = SkMinScalar(bounds.width(), bounds.height());
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
SkScalar minSize = minDim * SkScalarAbs(scaleFactors[0]);
SkScalar maxSize = maxDim * SkScalarAbs(scaleFactors[1]);
if (maxDim > kMaxDim || kMinSize > minSize || maxSize > kMaxSize) {
return CanDrawPath::kNo;
}
return CanDrawPath::kYes;
}
////////////////////////////////////////////////////////////////////////////////
// padding around path bounds to allow for antialiased pixels
static const SkScalar kAntiAliasPad = 1.0f;
class GrSmallPathRenderer::SmallPathOp final : public GrMeshDrawOp {
private:
using Helper = GrSimpleMeshDrawOpHelperWithStencil;
public:
DEFINE_OP_CLASS_ID
using ShapeCache = SkTDynamicHash<ShapeData, ShapeDataKey>;
using ShapeDataList = GrSmallPathRenderer::ShapeDataList;
static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* context,
GrPaint&& paint,
const GrShape& shape,
const SkMatrix& viewMatrix,
GrDrawOpAtlas* atlas,
ShapeCache* shapeCache,
ShapeDataList* shapeList,
bool gammaCorrect,
const GrUserStencilSettings* stencilSettings) {
return Helper::FactoryHelper<SmallPathOp>(context, std::move(paint), shape, viewMatrix,
atlas, shapeCache, shapeList, gammaCorrect,
stencilSettings);
}
SmallPathOp(Helper::MakeArgs helperArgs, const SkPMColor4f& color, const GrShape& shape,
const SkMatrix& viewMatrix, GrDrawOpAtlas* atlas, ShapeCache* shapeCache,
ShapeDataList* shapeList, bool gammaCorrect,
const GrUserStencilSettings* stencilSettings)
: INHERITED(ClassID()), fHelper(helperArgs, GrAAType::kCoverage, stencilSettings) {
SkASSERT(shape.hasUnstyledKey());
// Compute bounds
this->setTransformedBounds(shape.bounds(), viewMatrix, HasAABloat::kYes, IsZeroArea::kNo);
#if defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
fUsesDistanceField = true;
#else
// only use distance fields on desktop and Android framework to save space in the atlas
fUsesDistanceField = this->bounds().width() > kMaxMIP || this->bounds().height() > kMaxMIP;
#endif
// always use distance fields if in perspective
fUsesDistanceField = fUsesDistanceField || viewMatrix.hasPerspective();
fShapes.emplace_back(Entry{color, shape, viewMatrix});
fAtlas = atlas;
fShapeCache = shapeCache;
fShapeList = shapeList;
fGammaCorrect = gammaCorrect;
fWideColor = !SkPMColor4fFitsInBytes(color);
}
const char* name() const override { return "SmallPathOp"; }
void visitProxies(const VisitProxyFunc& func, VisitorType) const override {
fHelper.visitProxies(func);
const sk_sp<GrTextureProxy>* proxies = fAtlas->getProxies();
for (uint32_t i = 0; i < fAtlas->numActivePages(); ++i) {
SkASSERT(proxies[i]);
func(proxies[i].get());
}
}
#ifdef SK_DEBUG
SkString dumpInfo() const override {
SkString string;
for (const auto& geo : fShapes) {
string.appendf("Color: 0x%08x\n", geo.fColor.toBytes_RGBA());
}
string += fHelper.dumpInfo();
string += INHERITED::dumpInfo();
return string;
}
#endif
FixedFunctionFlags fixedFunctionFlags() const override { return fHelper.fixedFunctionFlags(); }
GrProcessorSet::Analysis finalize(const GrCaps& caps, const GrAppliedClip* clip,
GrFSAAType fsaaType, GrClampType clampType) override {
return fHelper.finalizeProcessors(
caps, clip, fsaaType, clampType, GrProcessorAnalysisCoverage::kSingleChannel,
&fShapes.front().fColor);
}
private:
struct FlushInfo {
sk_sp<const GrBuffer> fVertexBuffer;
sk_sp<const GrBuffer> fIndexBuffer;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
GrPipeline::FixedDynamicState* fFixedDynamicState;
int fVertexOffset;
int fInstancesToFlush;
};
void onPrepareDraws(Target* target) override {
int instanceCount = fShapes.count();
static constexpr int kMaxTextures = GrDistanceFieldPathGeoProc::kMaxTextures;
GR_STATIC_ASSERT(GrBitmapTextGeoProc::kMaxTextures == kMaxTextures);
FlushInfo flushInfo;
flushInfo.fFixedDynamicState = target->makeFixedDynamicState(kMaxTextures);
int numActiveProxies = fAtlas->numActivePages();
const auto proxies = fAtlas->getProxies();
for (int i = 0; i < numActiveProxies; ++i) {
flushInfo.fFixedDynamicState->fPrimitiveProcessorTextures[i] = proxies[i].get();
}
// Setup GrGeometryProcessor
const SkMatrix& ctm = fShapes[0].fViewMatrix;
if (fUsesDistanceField) {
uint32_t flags = 0;
// Still need to key off of ctm to pick the right shader for the transformed quad
flags |= ctm.isScaleTranslate() ? kScaleOnly_DistanceFieldEffectFlag : 0;
flags |= ctm.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
flags |= fGammaCorrect ? kGammaCorrect_DistanceFieldEffectFlag : 0;
const SkMatrix* matrix;
SkMatrix invert;
if (ctm.hasPerspective()) {
matrix = &ctm;
} else if (fHelper.usesLocalCoords()) {
if (!ctm.invert(&invert)) {
return;
}
matrix = &invert;
} else {
matrix = &SkMatrix::I();
}
flushInfo.fGeometryProcessor = GrDistanceFieldPathGeoProc::Make(
*target->caps().shaderCaps(), *matrix, fWideColor, fAtlas->getProxies(),
fAtlas->numActivePages(), GrSamplerState::ClampBilerp(), flags);
} else {
SkMatrix invert;
if (fHelper.usesLocalCoords()) {
if (!ctm.invert(&invert)) {
return;
}
}
flushInfo.fGeometryProcessor = GrBitmapTextGeoProc::Make(
*target->caps().shaderCaps(), this->color(), fWideColor, fAtlas->getProxies(),
fAtlas->numActivePages(), GrSamplerState::ClampNearest(), kA8_GrMaskFormat,
invert, false);
}
// allocate vertices
const size_t kVertexStride = flushInfo.fGeometryProcessor->vertexStride();
// We need to make sure we don't overflow a 32 bit int when we request space in the
// makeVertexSpace call below.
if (instanceCount > SK_MaxS32 / kVerticesPerQuad) {
return;
}
GrVertexWriter vertices{target->makeVertexSpace(kVertexStride,
kVerticesPerQuad * instanceCount,
&flushInfo.fVertexBuffer,
&flushInfo.fVertexOffset)};
flushInfo.fIndexBuffer = target->resourceProvider()->refQuadIndexBuffer();
if (!vertices.fPtr || !flushInfo.fIndexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
flushInfo.fInstancesToFlush = 0;
for (int i = 0; i < instanceCount; i++) {
const Entry& args = fShapes[i];
ShapeData* shapeData;
if (fUsesDistanceField) {
// get mip level
SkScalar maxScale;
const SkRect& bounds = args.fShape.bounds();
if (args.fViewMatrix.hasPerspective()) {
// approximate the scale since we can't get it from the matrix
SkRect xformedBounds;
args.fViewMatrix.mapRect(&xformedBounds, bounds);
maxScale = SkScalarAbs(SkTMax(xformedBounds.width() / bounds.width(),
xformedBounds.height() / bounds.height()));
} else {
maxScale = SkScalarAbs(args.fViewMatrix.getMaxScale());
}
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
// We try to create the DF at a 2^n scaled path resolution (1/2, 1, 2, 4, etc.)
// In the majority of cases this will yield a crisper rendering.
SkScalar mipScale = 1.0f;
// Our mipscale is the maxScale clamped to the next highest power of 2
if (maxScale <= SK_ScalarHalf) {
SkScalar log = SkScalarFloorToScalar(SkScalarLog2(SkScalarInvert(maxScale)));
mipScale = SkScalarPow(2, -log);
} else if (maxScale > SK_Scalar1) {
SkScalar log = SkScalarCeilToScalar(SkScalarLog2(maxScale));
mipScale = SkScalarPow(2, log);
}
SkASSERT(maxScale <= mipScale);
SkScalar mipSize = mipScale*SkScalarAbs(maxDim);
// For sizes less than kIdealMinMIP we want to use as large a distance field as we can
// so we can preserve as much detail as possible. However, we can't scale down more
// than a 1/4 of the size without artifacts. So the idea is that we pick the mipsize
// just bigger than the ideal, and then scale down until we are no more than 4x the
// original mipsize.
if (mipSize < kIdealMinMIP) {
SkScalar newMipSize = mipSize;
do {
newMipSize *= 2;
} while (newMipSize < kIdealMinMIP);
while (newMipSize > 4 * mipSize) {
newMipSize *= 0.25f;
}
mipSize = newMipSize;
}
SkScalar desiredDimension = SkTMin(mipSize, kMaxMIP);
// check to see if df path is cached
ShapeDataKey key(args.fShape, SkScalarCeilToInt(desiredDimension));
shapeData = fShapeCache->find(key);
if (nullptr == shapeData || !fAtlas->hasID(shapeData->fID)) {
// Remove the stale cache entry
if (shapeData) {
fShapeCache->remove(shapeData->fKey);
fShapeList->remove(shapeData);
delete shapeData;
}
SkScalar scale = desiredDimension / maxDim;
shapeData = new ShapeData;
if (!this->addDFPathToAtlas(target,
&flushInfo,
fAtlas,
shapeData,
args.fShape,
SkScalarCeilToInt(desiredDimension),
scale)) {
delete shapeData;
continue;
}
}
} else {
// check to see if bitmap path is cached
ShapeDataKey key(args.fShape, args.fViewMatrix);
shapeData = fShapeCache->find(key);
if (nullptr == shapeData || !fAtlas->hasID(shapeData->fID)) {
// Remove the stale cache entry
if (shapeData) {
fShapeCache->remove(shapeData->fKey);
fShapeList->remove(shapeData);
delete shapeData;
}
shapeData = new ShapeData;
if (!this->addBMPathToAtlas(target,
&flushInfo,
fAtlas,
shapeData,
args.fShape,
args.fViewMatrix)) {
delete shapeData;
continue;
}
}
}
auto uploadTarget = target->deferredUploadTarget();
fAtlas->setLastUseToken(shapeData->fID, uploadTarget->tokenTracker()->nextDrawToken());
this->writePathVertices(fAtlas, vertices, GrVertexColor(args.fColor, fWideColor),
args.fViewMatrix, shapeData);
flushInfo.fInstancesToFlush++;
}
this->flush(target, &flushInfo);
}
bool addToAtlas(GrMeshDrawOp::Target* target, FlushInfo* flushInfo, GrDrawOpAtlas* atlas,
int width, int height, const void* image,
GrDrawOpAtlas::AtlasID* id, SkIPoint16* atlasLocation) const {
auto resourceProvider = target->resourceProvider();
auto uploadTarget = target->deferredUploadTarget();
GrDrawOpAtlas::ErrorCode code = atlas->addToAtlas(resourceProvider, id,
uploadTarget, width, height,
image, atlasLocation);
if (GrDrawOpAtlas::ErrorCode::kError == code) {
return false;
}
if (GrDrawOpAtlas::ErrorCode::kTryAgain == code) {
this->flush(target, flushInfo);
code = atlas->addToAtlas(resourceProvider, id, uploadTarget, width, height,
image, atlasLocation);
}
return GrDrawOpAtlas::ErrorCode::kSucceeded == code;
}
bool addDFPathToAtlas(GrMeshDrawOp::Target* target, FlushInfo* flushInfo,
GrDrawOpAtlas* atlas, ShapeData* shapeData, const GrShape& shape,
uint32_t dimension, SkScalar scale) const {
const SkRect& bounds = shape.bounds();
// generate bounding rect for bitmap draw
SkRect scaledBounds = bounds;
// scale to mip level size
scaledBounds.fLeft *= scale;
scaledBounds.fTop *= scale;
scaledBounds.fRight *= scale;
scaledBounds.fBottom *= scale;
// subtract out integer portion of origin
// (SDF created will be placed with fractional offset burnt in)
SkScalar dx = SkScalarFloorToScalar(scaledBounds.fLeft);
SkScalar dy = SkScalarFloorToScalar(scaledBounds.fTop);
scaledBounds.offset(-dx, -dy);
// get integer boundary
SkIRect devPathBounds;
scaledBounds.roundOut(&devPathBounds);
// pad to allow room for antialiasing
const int intPad = SkScalarCeilToInt(kAntiAliasPad);
// place devBounds at origin
int width = devPathBounds.width() + 2*intPad;
int height = devPathBounds.height() + 2*intPad;
devPathBounds = SkIRect::MakeWH(width, height);
SkScalar translateX = intPad - dx;
SkScalar translateY = intPad - dy;
// draw path to bitmap
SkMatrix drawMatrix;
drawMatrix.setScale(scale, scale);
drawMatrix.postTranslate(translateX, translateY);
SkASSERT(devPathBounds.fLeft == 0);
SkASSERT(devPathBounds.fTop == 0);
SkASSERT(devPathBounds.width() > 0);
SkASSERT(devPathBounds.height() > 0);
// setup signed distance field storage
SkIRect dfBounds = devPathBounds.makeOutset(SK_DistanceFieldPad, SK_DistanceFieldPad);
width = dfBounds.width();
height = dfBounds.height();
// TODO We should really generate this directly into the plot somehow
SkAutoSMalloc<1024> dfStorage(width * height * sizeof(unsigned char));
SkPath path;
shape.asPath(&path);
#ifndef SK_USE_LEGACY_DISTANCE_FIELDS
// Generate signed distance field directly from SkPath
bool succeed = GrGenerateDistanceFieldFromPath((unsigned char*)dfStorage.get(),
path, drawMatrix,
width, height, width * sizeof(unsigned char));
if (!succeed) {
#endif
// setup bitmap backing
SkAutoPixmapStorage dst;
if (!dst.tryAlloc(SkImageInfo::MakeA8(devPathBounds.width(),
devPathBounds.height()))) {
return false;
}
sk_bzero(dst.writable_addr(), dst.computeByteSize());
// rasterize path
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
SkDraw draw;
SkRasterClip rasterClip;
rasterClip.setRect(devPathBounds);
draw.fRC = &rasterClip;
draw.fMatrix = &drawMatrix;
draw.fDst = dst;
draw.drawPathCoverage(path, paint);
// Generate signed distance field
SkGenerateDistanceFieldFromA8Image((unsigned char*)dfStorage.get(),
(const unsigned char*)dst.addr(),
dst.width(), dst.height(), dst.rowBytes());
#ifndef SK_USE_LEGACY_DISTANCE_FIELDS
}
#endif
// add to atlas
SkIPoint16 atlasLocation;
GrDrawOpAtlas::AtlasID id;
if (!this->addToAtlas(target, flushInfo, atlas,
width, height, dfStorage.get(), &id, &atlasLocation)) {
return false;
}
// add to cache
shapeData->fKey.set(shape, dimension);
shapeData->fID = id;
shapeData->fBounds = SkRect::Make(devPathBounds);
shapeData->fBounds.offset(-translateX, -translateY);
shapeData->fBounds.fLeft /= scale;
shapeData->fBounds.fTop /= scale;
shapeData->fBounds.fRight /= scale;
shapeData->fBounds.fBottom /= scale;
// We pack the 2bit page index in the low bit of the u and v texture coords
uint16_t pageIndex = GrDrawOpAtlas::GetPageIndexFromID(id);
SkASSERT(pageIndex < 4);
uint16_t uBit = (pageIndex >> 1) & 0x1;
uint16_t vBit = pageIndex & 0x1;
shapeData->fTextureCoords.set((atlasLocation.fX+SK_DistanceFieldPad) << 1 | uBit,
(atlasLocation.fY+SK_DistanceFieldPad) << 1 | vBit,
(atlasLocation.fX+SK_DistanceFieldPad+
devPathBounds.width()) << 1 | uBit,
(atlasLocation.fY+SK_DistanceFieldPad+
devPathBounds.height()) << 1 | vBit);
fShapeCache->add(shapeData);
fShapeList->addToTail(shapeData);
#ifdef DF_PATH_TRACKING
++g_NumCachedPaths;
#endif
return true;
}
bool addBMPathToAtlas(GrMeshDrawOp::Target* target, FlushInfo* flushInfo,
GrDrawOpAtlas* atlas, ShapeData* shapeData, const GrShape& shape,
const SkMatrix& ctm) const {
const SkRect& bounds = shape.bounds();
if (bounds.isEmpty()) {
return false;
}
SkMatrix drawMatrix(ctm);
SkScalar tx = ctm.getTranslateX();
SkScalar ty = ctm.getTranslateY();
tx -= SkScalarFloorToScalar(tx);
ty -= SkScalarFloorToScalar(ty);
drawMatrix.set(SkMatrix::kMTransX, tx);
drawMatrix.set(SkMatrix::kMTransY, ty);
SkRect shapeDevBounds;
drawMatrix.mapRect(&shapeDevBounds, bounds);
SkScalar dx = SkScalarFloorToScalar(shapeDevBounds.fLeft);
SkScalar dy = SkScalarFloorToScalar(shapeDevBounds.fTop);
// get integer boundary
SkIRect devPathBounds;
shapeDevBounds.roundOut(&devPathBounds);
// pad to allow room for antialiasing
const int intPad = SkScalarCeilToInt(kAntiAliasPad);
// place devBounds at origin
int width = devPathBounds.width() + 2 * intPad;
int height = devPathBounds.height() + 2 * intPad;
devPathBounds = SkIRect::MakeWH(width, height);
SkScalar translateX = intPad - dx;
SkScalar translateY = intPad - dy;
SkASSERT(devPathBounds.fLeft == 0);
SkASSERT(devPathBounds.fTop == 0);
SkASSERT(devPathBounds.width() > 0);
SkASSERT(devPathBounds.height() > 0);
SkPath path;
shape.asPath(&path);
// setup bitmap backing
SkAutoPixmapStorage dst;
if (!dst.tryAlloc(SkImageInfo::MakeA8(devPathBounds.width(),
devPathBounds.height()))) {
return false;
}
sk_bzero(dst.writable_addr(), dst.computeByteSize());
// rasterize path
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
SkDraw draw;
SkRasterClip rasterClip;
rasterClip.setRect(devPathBounds);
draw.fRC = &rasterClip;
drawMatrix.postTranslate(translateX, translateY);
draw.fMatrix = &drawMatrix;
draw.fDst = dst;
draw.drawPathCoverage(path, paint);
// add to atlas
SkIPoint16 atlasLocation;
GrDrawOpAtlas::AtlasID id;
if (!this->addToAtlas(target, flushInfo, atlas,
dst.width(), dst.height(), dst.addr(), &id, &atlasLocation)) {
return false;
}
// add to cache
shapeData->fKey.set(shape, ctm);
shapeData->fID = id;
shapeData->fBounds = SkRect::Make(devPathBounds);
shapeData->fBounds.offset(-translateX, -translateY);
// We pack the 2bit page index in the low bit of the u and v texture coords
uint16_t pageIndex = GrDrawOpAtlas::GetPageIndexFromID(id);
SkASSERT(pageIndex < 4);
uint16_t uBit = (pageIndex >> 1) & 0x1;
uint16_t vBit = pageIndex & 0x1;
shapeData->fTextureCoords.set(atlasLocation.fX << 1 | uBit, atlasLocation.fY << 1 | vBit,
(atlasLocation.fX+width) << 1 | uBit,
(atlasLocation.fY+height) << 1 | vBit);
fShapeCache->add(shapeData);
fShapeList->addToTail(shapeData);
#ifdef DF_PATH_TRACKING
++g_NumCachedPaths;
#endif
return true;
}
void writePathVertices(GrDrawOpAtlas* atlas,
GrVertexWriter& vertices,
const GrVertexColor& color,
const SkMatrix& ctm,
const ShapeData* shapeData) const {
SkRect translatedBounds(shapeData->fBounds);
if (!fUsesDistanceField) {
translatedBounds.offset(SkScalarFloorToScalar(ctm.get(SkMatrix::kMTransX)),
SkScalarFloorToScalar(ctm.get(SkMatrix::kMTransY)));
}
// set up texture coordinates
GrVertexWriter::TriStrip<uint16_t> texCoords{
(uint16_t)shapeData->fTextureCoords.fLeft,
(uint16_t)shapeData->fTextureCoords.fTop,
(uint16_t)shapeData->fTextureCoords.fRight,
(uint16_t)shapeData->fTextureCoords.fBottom
};
if (fUsesDistanceField && !ctm.hasPerspective()) {
vertices.writeQuad(GrQuad::MakeFromRect(translatedBounds, ctm),
color,
texCoords);
} else {
vertices.writeQuad(GrVertexWriter::TriStripFromRect(translatedBounds),
color,
texCoords);
}
}
void flush(GrMeshDrawOp::Target* target, FlushInfo* flushInfo) const {
GrGeometryProcessor* gp = flushInfo->fGeometryProcessor.get();
int numAtlasTextures = SkToInt(fAtlas->numActivePages());
auto proxies = fAtlas->getProxies();
if (gp->numTextureSamplers() != numAtlasTextures) {
for (int i = gp->numTextureSamplers(); i < numAtlasTextures; ++i) {
flushInfo->fFixedDynamicState->fPrimitiveProcessorTextures[i] = proxies[i].get();
}
// During preparation the number of atlas pages has increased.
// Update the proxies used in the GP to match.
if (fUsesDistanceField) {
reinterpret_cast<GrDistanceFieldPathGeoProc*>(gp)->addNewProxies(
fAtlas->getProxies(), fAtlas->numActivePages(), GrSamplerState::ClampBilerp());
} else {
reinterpret_cast<GrBitmapTextGeoProc*>(gp)->addNewProxies(
fAtlas->getProxies(), fAtlas->numActivePages(), GrSamplerState::ClampNearest());
}
}
if (flushInfo->fInstancesToFlush) {
GrMesh* mesh = target->allocMesh(GrPrimitiveType::kTriangles);
int maxInstancesPerDraw =
static_cast<int>(flushInfo->fIndexBuffer->size() / sizeof(uint16_t) / 6);
mesh->setIndexedPatterned(flushInfo->fIndexBuffer, kIndicesPerQuad, kVerticesPerQuad,
flushInfo->fInstancesToFlush, maxInstancesPerDraw);
mesh->setVertexData(flushInfo->fVertexBuffer, flushInfo->fVertexOffset);
target->recordDraw(
flushInfo->fGeometryProcessor, mesh, 1, flushInfo->fFixedDynamicState, nullptr);
flushInfo->fVertexOffset += kVerticesPerQuad * flushInfo->fInstancesToFlush;
flushInfo->fInstancesToFlush = 0;
}
}
void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) override {
fHelper.executeDrawsAndUploads(this, flushState, chainBounds);
}
const SkPMColor4f& color() const { return fShapes[0].fColor; }
bool usesDistanceField() const { return fUsesDistanceField; }
CombineResult onCombineIfPossible(GrOp* t, const GrCaps& caps) override {
SmallPathOp* that = t->cast<SmallPathOp>();
if (!fHelper.isCompatible(that->fHelper, caps, this->bounds(), that->bounds())) {
return CombineResult::kCannotCombine;
}
if (this->usesDistanceField() != that->usesDistanceField()) {
return CombineResult::kCannotCombine;
}
const SkMatrix& thisCtm = this->fShapes[0].fViewMatrix;
const SkMatrix& thatCtm = that->fShapes[0].fViewMatrix;
if (thisCtm.hasPerspective() != thatCtm.hasPerspective()) {
return CombineResult::kCannotCombine;
}
// We can position on the cpu unless we're in perspective,
// but also need to make sure local matrices are identical
if ((thisCtm.hasPerspective() || fHelper.usesLocalCoords()) &&
!thisCtm.cheapEqualTo(thatCtm)) {
return CombineResult::kCannotCombine;
}
// Depending on the ctm we may have a different shader for SDF paths
if (this->usesDistanceField()) {
if (thisCtm.isScaleTranslate() != thatCtm.isScaleTranslate() ||
thisCtm.isSimilarity() != thatCtm.isSimilarity()) {
return CombineResult::kCannotCombine;
}
}
fShapes.push_back_n(that->fShapes.count(), that->fShapes.begin());
fWideColor |= that->fWideColor;
return CombineResult::kMerged;
}
bool fUsesDistanceField;
struct Entry {
SkPMColor4f fColor;
GrShape fShape;
SkMatrix fViewMatrix;
};
SkSTArray<1, Entry> fShapes;
Helper fHelper;
GrDrawOpAtlas* fAtlas;
ShapeCache* fShapeCache;
ShapeDataList* fShapeList;
bool fGammaCorrect;
bool fWideColor;
typedef GrMeshDrawOp INHERITED;
};
bool GrSmallPathRenderer::onDrawPath(const DrawPathArgs& args) {
GR_AUDIT_TRAIL_AUTO_FRAME(args.fRenderTargetContext->auditTrail(),
"GrSmallPathRenderer::onDrawPath");
// we've already bailed on inverse filled paths, so this is safe
SkASSERT(!args.fShape->isEmpty());
SkASSERT(args.fShape->hasUnstyledKey());
if (!fAtlas) {
const GrBackendFormat format =
args.fContext->priv().caps()->getBackendFormatFromColorType(
kAlpha_8_SkColorType);
fAtlas = GrDrawOpAtlas::Make(args.fContext->priv().proxyProvider(),
format,
kAlpha_8_GrPixelConfig,
ATLAS_TEXTURE_WIDTH, ATLAS_TEXTURE_HEIGHT,
PLOT_WIDTH, PLOT_HEIGHT,
GrDrawOpAtlas::AllowMultitexturing::kYes,
&GrSmallPathRenderer::HandleEviction,
(void*)this);
if (!fAtlas) {
return false;
}
}
std::unique_ptr<GrDrawOp> op = SmallPathOp::Make(
args.fContext, std::move(args.fPaint), *args.fShape, *args.fViewMatrix, fAtlas.get(),
&fShapeCache, &fShapeList, args.fGammaCorrect, args.fUserStencilSettings);
args.fRenderTargetContext->addDrawOp(*args.fClip, std::move(op));
return true;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#if GR_TEST_UTILS
struct GrSmallPathRenderer::PathTestStruct {
PathTestStruct() : fContextID(SK_InvalidGenID), fAtlas(nullptr) {}
~PathTestStruct() { this->reset(); }
void reset() {
ShapeDataList::Iter iter;
iter.init(fShapeList, ShapeDataList::Iter::kHead_IterStart);
ShapeData* shapeData;
while ((shapeData = iter.get())) {
iter.next();
fShapeList.remove(shapeData);
delete shapeData;
}
fAtlas = nullptr;
fShapeCache.reset();
}
static void HandleEviction(GrDrawOpAtlas::AtlasID id, void* pr) {
PathTestStruct* dfpr = (PathTestStruct*)pr;
// remove any paths that use this plot
ShapeDataList::Iter iter;
iter.init(dfpr->fShapeList, ShapeDataList::Iter::kHead_IterStart);
ShapeData* shapeData;
while ((shapeData = iter.get())) {
iter.next();
if (id == shapeData->fID) {
dfpr->fShapeCache.remove(shapeData->fKey);
dfpr->fShapeList.remove(shapeData);
delete shapeData;
}
}
}
uint32_t fContextID;
std::unique_ptr<GrDrawOpAtlas> fAtlas;
ShapeCache fShapeCache;
ShapeDataList fShapeList;
};
std::unique_ptr<GrDrawOp> GrSmallPathRenderer::createOp_TestingOnly(
GrRecordingContext* context,
GrPaint&& paint,
const GrShape& shape,
const SkMatrix& viewMatrix,
GrDrawOpAtlas* atlas,
ShapeCache* shapeCache,
ShapeDataList* shapeList,
bool gammaCorrect,
const GrUserStencilSettings* stencil) {
return GrSmallPathRenderer::SmallPathOp::Make(context, std::move(paint), shape, viewMatrix,
atlas, shapeCache, shapeList, gammaCorrect,
stencil);
}
GR_DRAW_OP_TEST_DEFINE(SmallPathOp) {
using PathTestStruct = GrSmallPathRenderer::PathTestStruct;
static PathTestStruct gTestStruct;
if (context->priv().contextID() != gTestStruct.fContextID) {
gTestStruct.fContextID = context->priv().contextID();
gTestStruct.reset();
const GrBackendFormat format =
context->priv().caps()->getBackendFormatFromColorType(kAlpha_8_SkColorType);
gTestStruct.fAtlas = GrDrawOpAtlas::Make(context->priv().proxyProvider(),
format, kAlpha_8_GrPixelConfig,
ATLAS_TEXTURE_WIDTH, ATLAS_TEXTURE_HEIGHT,
PLOT_WIDTH, PLOT_HEIGHT,
GrDrawOpAtlas::AllowMultitexturing::kYes,
&PathTestStruct::HandleEviction,
(void*)&gTestStruct);
}
SkMatrix viewMatrix = GrTest::TestMatrix(random);
bool gammaCorrect = random->nextBool();
// This path renderer only allows fill styles.
GrShape shape(GrTest::TestPath(random), GrStyle::SimpleFill());
return GrSmallPathRenderer::createOp_TestingOnly(
context,
std::move(paint), shape, viewMatrix,
gTestStruct.fAtlas.get(),
&gTestStruct.fShapeCache,
&gTestStruct.fShapeList,
gammaCorrect,
GrGetRandomStencil(random, context));
}
#endif