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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkAtlasTextTarget.h"
#include "GrClip.h"
#include "GrContextPriv.h"
#include "GrDrawingManager.h"
#include "GrMemoryPool.h"
#include "SkAtlasTextContext.h"
#include "SkAtlasTextFont.h"
#include "SkAtlasTextRenderer.h"
#include "SkGr.h"
#include "SkInternalAtlasTextContext.h"
#include "ops/GrAtlasTextOp.h"
#include "text/GrTextContext.h"
static constexpr int kMaxBatchLookBack = 10;
SkAtlasTextTarget::SkAtlasTextTarget(sk_sp<SkAtlasTextContext> context, int width, int height,
void* handle)
: fHandle(handle)
, fContext(std::move(context))
, fWidth(width)
, fHeight(height)
, fMatrixStack(sizeof(SkMatrix), 4)
, fSaveCnt(0) {
fMatrixStack.push_back();
this->accessCTM()->reset();
}
SkAtlasTextTarget::~SkAtlasTextTarget() { fContext->renderer()->targetDeleted(fHandle); }
int SkAtlasTextTarget::save() {
const auto& currCTM = this->ctm();
*static_cast<SkMatrix*>(fMatrixStack.push_back()) = currCTM;
return fSaveCnt++;
}
void SkAtlasTextTarget::restore() {
if (fSaveCnt) {
fMatrixStack.pop_back();
fSaveCnt--;
}
}
void SkAtlasTextTarget::restoreToCount(int count) {
while (fSaveCnt > count) {
this->restore();
}
}
void SkAtlasTextTarget::translate(SkScalar dx, SkScalar dy) {
this->accessCTM()->preTranslate(dx, dy);
}
void SkAtlasTextTarget::scale(SkScalar sx, SkScalar sy) { this->accessCTM()->preScale(sx, sy); }
void SkAtlasTextTarget::rotate(SkScalar degrees) { this->accessCTM()->preRotate(degrees); }
void SkAtlasTextTarget::rotate(SkScalar degrees, SkScalar px, SkScalar py) {
this->accessCTM()->preRotate(degrees, px, py);
}
void SkAtlasTextTarget::skew(SkScalar sx, SkScalar sy) { this->accessCTM()->preSkew(sx, sy); }
void SkAtlasTextTarget::concat(const SkMatrix& matrix) { this->accessCTM()->preConcat(matrix); }
//////////////////////////////////////////////////////////////////////////////
static const GrColorSpaceInfo kColorSpaceInfo(nullptr, kRGBA_8888_GrPixelConfig);
//////////////////////////////////////////////////////////////////////////////
class SkInternalAtlasTextTarget : public GrTextUtils::Target, public SkAtlasTextTarget {
public:
SkInternalAtlasTextTarget(sk_sp<SkAtlasTextContext> context,
int width, int height,
void* handle)
: GrTextUtils::Target(width, height, kColorSpaceInfo)
, SkAtlasTextTarget(std::move(context), width, height, handle) {
}
/** GrTextUtils::Target overrides */
void addDrawOp(const GrClip&, std::unique_ptr<GrAtlasTextOp> op) override;
void drawPath(const GrClip&, const SkPath&, const SkPaint&, const SkMatrix& viewMatrix,
const SkMatrix* pathMatrix, const SkIRect& clipBounds) override {
SkDebugf("Path glyph??");
}
void makeGrPaint(GrMaskFormat, const SkPaint& skPaint, const SkMatrix&,
GrPaint* grPaint) override {
grPaint->setColor4f(SkColorToPremulGrColor4fLegacy(skPaint.getColor()));
}
GrContext* getContext() override {
return this->context()->internal().grContext();
}
/** SkAtlasTextTarget overrides */
void drawText(const SkGlyphID[], const SkPoint[], int glyphCnt, uint32_t color,
const SkAtlasTextFont&) override;
void flush() override;
private:
uint32_t fColor;
using SkAtlasTextTarget::fWidth;
using SkAtlasTextTarget::fHeight;
SkTArray<std::unique_ptr<GrAtlasTextOp>, true> fOps;
};
//////////////////////////////////////////////////////////////////////////////
std::unique_ptr<SkAtlasTextTarget> SkAtlasTextTarget::Make(sk_sp<SkAtlasTextContext> context,
int width, int height, void* handle) {
return std::unique_ptr<SkAtlasTextTarget>(
new SkInternalAtlasTextTarget(std::move(context), width, height, handle));
}
//////////////////////////////////////////////////////////////////////////////
void SkInternalAtlasTextTarget::drawText(const SkGlyphID glyphs[], const SkPoint positions[],
int glyphCnt, uint32_t color,
const SkAtlasTextFont& font) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setTypeface(font.refTypeface());
paint.setTextSize(font.size());
paint.setStyle(SkPaint::kFill_Style);
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
// The atlas text context does munging of the paint color. We store the client's color here
// and then overwrite the generated op's color when addDrawOp() is called.
fColor = color;
SkSurfaceProps props(SkSurfaceProps::kUseDistanceFieldFonts_Flag, kUnknown_SkPixelGeometry);
auto* grContext = this->context()->internal().grContext();
auto bounds = SkIRect::MakeWH(fWidth, fHeight);
auto atlasTextContext = grContext->contextPriv().drawingManager()->getTextContext();
size_t byteLength = sizeof(SkGlyphID) * glyphCnt;
const SkScalar* pos = &positions->fX;
atlasTextContext->drawPosText(grContext, this, GrNoClip(), paint, this->ctm(), props,
(const char*)glyphs, byteLength, pos, 2, {0, 0}, bounds);
}
void SkInternalAtlasTextTarget::addDrawOp(const GrClip& clip, std::unique_ptr<GrAtlasTextOp> op) {
SkASSERT(clip.quickContains(SkRect::MakeIWH(fWidth, fHeight)));
// The SkAtlasTextRenderer currently only handles grayscale SDF glyphs.
if (op->maskType() != GrAtlasTextOp::kGrayscaleDistanceField_MaskType) {
return;
}
const GrCaps& caps = *this->context()->internal().grContext()->contextPriv().caps();
op->finalizeForTextTarget(fColor, caps);
int n = SkTMin(kMaxBatchLookBack, fOps.count());
for (int i = 0; i < n; ++i) {
GrAtlasTextOp* other = fOps.fromBack(i).get();
if (other->combineIfPossible(op.get(), caps)) {
return;
}
if (GrRectsOverlap(op->bounds(), other->bounds())) {
break;
}
}
op->visitProxies([](GrSurfaceProxy*) {});
fOps.emplace_back(std::move(op));
}
void SkInternalAtlasTextTarget::flush() {
for (int i = 0; i < fOps.count(); ++i) {
fOps[i]->executeForTextTarget(this);
}
this->context()->internal().flush();
fOps.reset();
}
void GrAtlasTextOp::finalizeForTextTarget(uint32_t color, const GrCaps& caps) {
for (int i = 0; i < fGeoCount; ++i) {
fGeoData[i].fColor = color;
}
this->finalize(caps, nullptr /* applied clip */, GrPixelConfigIsClamped::kNo);
}
void GrAtlasTextOp::executeForTextTarget(SkAtlasTextTarget* target) {
FlushInfo flushInfo;
SkExclusiveStrikePtr autoGlyphCache;
auto& context = target->context()->internal();
auto glyphCache = context.grContext()->contextPriv().getGlyphCache();
auto atlasManager = context.grContext()->contextPriv().getAtlasManager();
auto resourceProvider = context.grContext()->contextPriv().resourceProvider();
unsigned int numProxies;
if (!atlasManager->getProxies(kA8_GrMaskFormat, &numProxies)) {
return;
}
for (int i = 0; i < fGeoCount; ++i) {
GrTextBlob::VertexRegenerator regenerator(
resourceProvider, fGeoData[i].fBlob, fGeoData[i].fRun, fGeoData[i].fSubRun,
fGeoData[i].fViewMatrix, fGeoData[i].fX, fGeoData[i].fY, fGeoData[i].fColor,
&context, glyphCache, atlasManager, &autoGlyphCache);
bool done = false;
while (!done) {
GrTextBlob::VertexRegenerator::Result result;
if (!regenerator.regenerate(&result)) {
break;
}
done = result.fFinished;
context.recordDraw(result.fFirstVertex, result.fGlyphsRegenerated,
fGeoData[i].fViewMatrix, target->handle());
if (!result.fFinished) {
// Make space in the atlas so we can continue generating vertices.
context.flush();
}
}
}
}
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