blob: 4e8ead5b3434d30066fa3c7479f05d261f5ff519 [file] [log] [blame]
* Copyright 2018 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef GrAtlasManager_DEFINED
#define GrAtlasManager_DEFINED
#include "src/gpu/ganesh/GrCaps.h"
#include "src/gpu/ganesh/GrDrawOpAtlas.h"
#include "src/gpu/ganesh/GrOnFlushResourceProvider.h"
#include "src/gpu/ganesh/GrProxyProvider.h"
namespace sktext::gpu {
class Glyph;
class GrResourceProvider;
class SkGlyph;
class GrTextStrike;
/** The GrAtlasManager manages the lifetime of and access to GrDrawOpAtlases.
* It is only available at flush and only via the GrOpFlushState.
* This implies that all of the advanced atlasManager functionality (i.e.,
* adding glyphs to the atlas) are only available at flush time.
class GrAtlasManager : public GrOnFlushCallbackObject, public skgpu::AtlasGenerationCounter {
size_t maxTextureBytes,
bool supportBilerpAtlas);
~GrAtlasManager() override;
// if getViews returns nullptr, the client must not try to use other functions on the
// GrStrikeCache which use the atlas. This function *must* be called first, before other
// functions which use the atlas. Note that we can have proxies available but none active
// (i.e., none instantiated).
const GrSurfaceProxyView* getViews(skgpu::MaskFormat format, unsigned int* numActiveProxies) {
format = this->resolveMaskFormat(format);
if (this->initAtlas(format)) {
*numActiveProxies = this->getAtlas(format)->numActivePages();
return this->getAtlas(format)->getViews();
*numActiveProxies = 0;
return nullptr;
void freeAll();
bool hasGlyph(skgpu::MaskFormat, sktext::gpu::Glyph*);
GrDrawOpAtlas::ErrorCode addGlyphToAtlas(const SkGlyph&,
int srcPadding,
// To ensure the GrDrawOpAtlas does not evict the Glyph Mask from its texture backing store,
// the client must pass in the current op token along with the sktext::gpu::Glyph.
// A BulkUseTokenUpdater is used to manage bulk last use token updating in the Atlas.
// For convenience, this function will also set the use token for the current glyph if required
// NOTE: the bulk uploader is only valid if the subrun has a valid atlasGeneration
void addGlyphToBulkAndSetUseToken(GrDrawOpAtlas::BulkUseTokenUpdater*, skgpu::MaskFormat,
sktext::gpu::Glyph*, GrDeferredUploadToken);
void setUseTokenBulk(const GrDrawOpAtlas::BulkUseTokenUpdater& updater,
GrDeferredUploadToken token,
skgpu::MaskFormat format) {
this->getAtlas(format)->setLastUseTokenBulk(updater, token);
// add to texture atlas that matches this format
GrDrawOpAtlas::ErrorCode addToAtlas(GrResourceProvider*, GrDeferredUploadTarget*,
skgpu::MaskFormat, int width, int height, const void* image,
// Some clients may wish to verify the integrity of the texture backing store of the
// GrDrawOpAtlas. The atlasGeneration returned below is a monotonically increasing number which
// changes every time something is removed from the texture backing store.
uint64_t atlasGeneration(skgpu::MaskFormat format) const {
return this->getAtlas(format)->atlasGeneration();
// GrOnFlushCallbackObject overrides
void preFlush(GrOnFlushResourceProvider* onFlushRP, SkSpan<const uint32_t>) override {
for (int i = 0; i < skgpu::kMaskFormatCount; ++i) {
if (fAtlases[i]) {
void postFlush(GrDeferredUploadToken startTokenForNextFlush, SkSpan<const uint32_t>) override {
for (int i = 0; i < skgpu::kMaskFormatCount; ++i) {
if (fAtlases[i]) {
// The AtlasGlyph cache always survives freeGpuResources so we want it to remain in the active
// OnFlushCallbackObject list
bool retainOnFreeGpuResources() override { return true; }
// Functions intended debug only
#ifdef SK_DEBUG
void dump(GrDirectContext*) const;
void setAtlasDimensionsToMinimum_ForTesting();
void setMaxPages_TestingOnly(uint32_t maxPages);
bool initAtlas(skgpu::MaskFormat);
// Change an expected 565 mask format to 8888 if 565 is not supported (will happen when using
// Metal on macOS). The actual conversion of the data is handled in get_packed_glyph_image() in
// GrStrikeCache.cpp
skgpu::MaskFormat resolveMaskFormat(skgpu::MaskFormat format) const {
if (skgpu::MaskFormat::kA565 == format &&
GrRenderable::kNo).isValid()) {
format = skgpu::MaskFormat::kARGB;
return format;
// There is a 1:1 mapping between skgpu::MaskFormats and atlas indices
static int MaskFormatToAtlasIndex(skgpu::MaskFormat format) {
return static_cast<int>(format);
static skgpu::MaskFormat AtlasIndexToMaskFormat(int idx) {
return static_cast<skgpu::MaskFormat>(idx);
GrDrawOpAtlas* getAtlas(skgpu::MaskFormat format) const {
format = this->resolveMaskFormat(format);
int atlasIndex = MaskFormatToAtlasIndex(format);
return fAtlases[atlasIndex].get();
GrDrawOpAtlas::AllowMultitexturing fAllowMultitexturing;
std::unique_ptr<GrDrawOpAtlas> fAtlases[skgpu::kMaskFormatCount];
static_assert(skgpu::kMaskFormatCount == 3);
bool fSupportBilerpAtlas;
GrProxyProvider* fProxyProvider;
sk_sp<const GrCaps> fCaps;
GrDrawOpAtlasConfig fAtlasConfig;
using INHERITED = GrOnFlushCallbackObject;
#endif // GrAtlasManager_DEFINED