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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 "SkInternalAtlasTextContext.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "SkAtlasTextContext.h"
#include "SkAtlasTextRenderer.h"
#include "text/GrGlyphCache.h"
SkAtlasTextRenderer* SkGetAtlasTextRendererFromInternalContext(
class SkInternalAtlasTextContext& internal) {
return internal.renderer();
}
//////////////////////////////////////////////////////////////////////////////
std::unique_ptr<SkInternalAtlasTextContext> SkInternalAtlasTextContext::Make(
sk_sp<SkAtlasTextRenderer> renderer) {
return std::unique_ptr<SkInternalAtlasTextContext>(
new SkInternalAtlasTextContext(std::move(renderer)));
}
SkInternalAtlasTextContext::SkInternalAtlasTextContext(sk_sp<SkAtlasTextRenderer> renderer)
: fRenderer(std::move(renderer)) {
GrContextOptions options;
options.fAllowMultipleGlyphCacheTextures = GrContextOptions::Enable::kNo;
options.fMinDistanceFieldFontSize = 0.f;
options.fGlyphsAsPathsFontSize = SK_ScalarInfinity;
options.fDistanceFieldGlyphVerticesAlwaysHaveW = GrContextOptions::Enable::kYes;
fGrContext = GrContext::MakeMock(nullptr, options);
}
SkInternalAtlasTextContext::~SkInternalAtlasTextContext() {
if (fDistanceFieldAtlas.fProxy) {
#ifdef SK_DEBUG
auto atlasManager = fGrContext->contextPriv().getAtlasManager();
if (atlasManager) {
unsigned int numProxies;
atlasManager->getProxies(kA8_GrMaskFormat, &numProxies);
SkASSERT(1 == numProxies);
}
#endif
fRenderer->deleteTexture(fDistanceFieldAtlas.fTextureHandle);
}
}
GrGlyphCache* SkInternalAtlasTextContext::glyphCache() {
return fGrContext->contextPriv().getGlyphCache();
}
GrTextBlobCache* SkInternalAtlasTextContext::textBlobCache() {
return fGrContext->contextPriv().getTextBlobCache();
}
GrDeferredUploadToken SkInternalAtlasTextContext::addInlineUpload(
GrDeferredTextureUploadFn&& upload) {
auto token = fTokenTracker.nextDrawToken();
fInlineUploads.append(&fArena, InlineUpload{std::move(upload), token});
return token;
}
GrDeferredUploadToken SkInternalAtlasTextContext::addASAPUpload(
GrDeferredTextureUploadFn&& upload) {
fASAPUploads.append(&fArena, std::move(upload));
return fTokenTracker.nextTokenToFlush();
}
void SkInternalAtlasTextContext::recordDraw(const void* srcVertexData, int glyphCnt,
const SkMatrix& matrix, void* targetHandle) {
auto vertexDataSize = sizeof(SkAtlasTextRenderer::SDFVertex) * 4 * glyphCnt;
auto vertexData = fArena.makeArrayDefault<char>(vertexDataSize);
memcpy(vertexData, srcVertexData, vertexDataSize);
for (int i = 0; i < 4 * glyphCnt; ++i) {
auto* vertex = reinterpret_cast<SkAtlasTextRenderer::SDFVertex*>(vertexData) + i;
// GrTextContext encodes a texture index into the lower bit of each texture coord.
// This isn't expected by SkAtlasTextRenderer subclasses.
vertex->fTextureCoordX /= 2;
vertex->fTextureCoordY /= 2;
matrix.mapHomogeneousPoints(&vertex->fPosition, &vertex->fPosition, 1);
}
fDraws.append(&fArena,
Draw{glyphCnt, fTokenTracker.issueDrawToken(), targetHandle, vertexData});
}
void SkInternalAtlasTextContext::flush() {
auto* atlasManager = fGrContext->contextPriv().getAtlasManager();
if (!fDistanceFieldAtlas.fProxy) {
unsigned int numProxies;
fDistanceFieldAtlas.fProxy = atlasManager->getProxies(kA8_GrMaskFormat, &numProxies)->get();
SkASSERT(1 == numProxies);
fDistanceFieldAtlas.fTextureHandle =
fRenderer->createTexture(SkAtlasTextRenderer::AtlasFormat::kA8,
fDistanceFieldAtlas.fProxy->width(),
fDistanceFieldAtlas.fProxy->height());
}
GrDeferredTextureUploadWritePixelsFn writePixelsFn =
[this](GrTextureProxy* proxy, int left, int top, int width, int height,
GrColorType colorType, const void* data, size_t rowBytes) -> bool {
SkASSERT(GrColorType::kAlpha_8 == colorType);
SkASSERT(proxy == this->fDistanceFieldAtlas.fProxy);
void* handle = fDistanceFieldAtlas.fTextureHandle;
this->fRenderer->setTextureData(handle, data, left, top, width, height, rowBytes);
return true;
};
for (const auto& upload : fASAPUploads) {
upload(writePixelsFn);
}
auto inlineUpload = fInlineUploads.begin();
for (const auto& draw : fDraws) {
while (inlineUpload != fInlineUploads.end() && inlineUpload->fToken == draw.fToken) {
inlineUpload->fUpload(writePixelsFn);
++inlineUpload;
}
auto vertices = reinterpret_cast<const SkAtlasTextRenderer::SDFVertex*>(draw.fVertexData);
fRenderer->drawSDFGlyphs(draw.fTargetHandle, fDistanceFieldAtlas.fTextureHandle, vertices,
draw.fGlyphCnt);
fTokenTracker.flushToken();
}
fASAPUploads.reset();
fInlineUploads.reset();
fDraws.reset();
fArena.reset();
}
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