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Factor out GrAtlasTextBatch fromt GrAtlasTextContext

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BUG=skia:

Review URL: https://codereview.chromium.org/1458233003
This commit is contained in:
joshualitt 2015-11-20 13:37:32 -08:00 committed by Commit bot
parent 897c993763
commit a751c97e30
6 changed files with 757 additions and 703 deletions
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2
gyp/gpu.gypi
View File

@ -210,6 +210,8 @@
'<(skia_src_path)/gpu/batches/GrAAFillRectBatch.h',
'<(skia_src_path)/gpu/batches/GrAAStrokeRectBatch.cpp',
'<(skia_src_path)/gpu/batches/GrAAStrokeRectBatch.h',
'<(skia_src_path)/gpu/batches/GrAtlasTextBatch.cpp',
'<(skia_src_path)/gpu/batches/GrAtlasTextBatch.h',
'<(skia_src_path)/gpu/batches/GrBatch.cpp',
'<(skia_src_path)/gpu/batches/GrBatch.h',
'<(skia_src_path)/gpu/batches/GrClearBatch.h',

719
src/gpu/GrAtlasTextContext.cpp
View File

@ -6,15 +6,10 @@
*/
#include "GrAtlasTextContext.h"
#include "GrBatchFontCache.h"
#include "GrBatchFlushState.h"
#include "GrBatchTest.h"
#include "GrBlurUtils.h"
#include "GrDefaultGeoProcFactory.h"
#include "GrDrawContext.h"
#include "GrDrawTarget.h"
#include "GrFontScaler.h"
#include "GrResourceProvider.h"
#include "GrStrokeInfo.h"
#include "GrTextBlobCache.h"
#include "GrTexturePriv.h"
@ -37,19 +32,9 @@
#include "SkTextBlob.h"
#include "SkTextMapStateProc.h"
#include "batches/GrVertexBatch.h"
#include "effects/GrBitmapTextGeoProc.h"
#include "effects/GrDistanceFieldGeoProc.h"
#include "batches/GrAtlasTextBatch.h"
namespace {
static const size_t kLCDTextVASize = sizeof(SkPoint) + sizeof(SkIPoint16);
// position + local coord
static const size_t kColorTextVASize = sizeof(SkPoint) + sizeof(SkIPoint16);
static const size_t kGrayTextVASize = sizeof(SkPoint) + sizeof(GrColor) + sizeof(SkIPoint16);
static const int kMinDFFontSize = 18;
static const int kSmallDFFontSize = 32;
static const int kSmallDFFontLimit = 32;
@ -63,38 +48,6 @@ static const int kLargeDFFontLimit = 2 * kLargeDFFontSize;
#endif
SkDEBUGCODE(static const int kExpectedDistanceAdjustTableSize = 8;)
static const int kDistanceAdjustLumShift = 5;
static const int kVerticesPerGlyph = 4;
static const int kIndicesPerGlyph = 6;
static size_t get_vertex_stride(GrMaskFormat maskFormat) {
switch (maskFormat) {
case kA8_GrMaskFormat:
return kGrayTextVASize;
case kARGB_GrMaskFormat:
return kColorTextVASize;
default:
return kLCDTextVASize;
}
}
static size_t get_vertex_stride_df(GrMaskFormat maskFormat, bool useLCDText) {
SkASSERT(maskFormat == kA8_GrMaskFormat);
if (useLCDText) {
return kLCDTextVASize;
} else {
return kGrayTextVASize;
}
}
static inline GrColor skcolor_to_grcolor_nopremultiply(SkColor c) {
unsigned r = SkColorGetR(c);
unsigned g = SkColorGetG(c);
unsigned b = SkColorGetB(c);
return GrColorPackRGBA(r, g, b, 0xff);
}
};
GrAtlasTextContext::GrAtlasTextContext(GrContext* context, const SkSurfaceProps& surfaceProps)
@ -102,7 +55,8 @@ GrAtlasTextContext::GrAtlasTextContext(GrContext* context, const SkSurfaceProps&
, fDistanceAdjustTable(new DistanceAdjustTable) {
// We overallocate vertices in our textblobs based on the assumption that A8 has the greatest
// vertexStride
static_assert(kGrayTextVASize >= kColorTextVASize && kGrayTextVASize >= kLCDTextVASize,
static_assert(GrAtlasTextBatch::kGrayTextVASize >= GrAtlasTextBatch::kColorTextVASize &&
GrAtlasTextBatch::kGrayTextVASize >= GrAtlasTextBatch::kLCDTextVASize,
"vertex_attribute_changed");
fCurrStrike = nullptr;
fCache = context->getTextBlobCache();
@ -402,7 +356,7 @@ void GrAtlasTextContext::drawTextBlob(GrDrawContext* dc, GrRenderTarget* rt,
// but we'd have to clear the subrun information
fCache->remove(cacheBlob);
cacheBlob.reset(SkRef(fCache->createCachedBlob(blob, key, blurRec, skPaint,
kGrayTextVASize)));
GrAtlasTextBatch::kGrayTextVASize)));
this->regenerateTextBlob(cacheBlob, skPaint, grPaint.getColor(), viewMatrix,
blob, x, y, drawFilter, clipRect, rt, clip);
} else {
@ -430,9 +384,9 @@ void GrAtlasTextContext::drawTextBlob(GrDrawContext* dc, GrRenderTarget* rt,
} else {
if (canCache) {
cacheBlob.reset(SkRef(fCache->createCachedBlob(blob, key, blurRec, skPaint,
kGrayTextVASize)));
GrAtlasTextBatch::kGrayTextVASize)));
} else {
cacheBlob.reset(fCache->createBlob(blob, kGrayTextVASize));
cacheBlob.reset(fCache->createBlob(blob, GrAtlasTextBatch::kGrayTextVASize));
}
this->regenerateTextBlob(cacheBlob, skPaint, grPaint.getColor(), viewMatrix,
blob, x, y, drawFilter, clipRect, rt, clip);
@ -689,7 +643,7 @@ inline GrAtlasTextBlob*
GrAtlasTextContext::setupDFBlob(int glyphCount, const SkPaint& origPaint,
const SkMatrix& viewMatrix, SkPaint* dfPaint,
SkScalar* textRatio) {
GrAtlasTextBlob* blob = fCache->createBlob(glyphCount, 1, kGrayTextVASize);
GrAtlasTextBlob* blob = fCache->createBlob(glyphCount, 1, GrAtlasTextBatch::kGrayTextVASize);
*dfPaint = origPaint;
this->initDistanceFieldPaint(blob, dfPaint, textRatio, viewMatrix);
@ -729,7 +683,7 @@ GrAtlasTextContext::createDrawTextBlob(GrRenderTarget* rt, const GrClip& clip,
fallbackTxt, fallbackPos, 2, offset, clipRect);
}
} else {
blob = fCache->createBlob(glyphCount, 1, kGrayTextVASize);
blob = fCache->createBlob(glyphCount, 1, GrAtlasTextBatch::kGrayTextVASize);
blob->fViewMatrix = viewMatrix;
SkGlyphCache* cache = this->setupCache(&blob->fRuns[0], skPaint, &viewMatrix, false);
@ -769,7 +723,7 @@ GrAtlasTextContext::createDrawPosTextBlob(GrRenderTarget* rt, const GrClip& clip
clipRect);
}
} else {
blob = fCache->createBlob(glyphCount, 1, kGrayTextVASize);
blob = fCache->createBlob(glyphCount, 1, GrAtlasTextBatch::kGrayTextVASize);
blob->fViewMatrix = viewMatrix;
SkGlyphCache* cache = this->setupCache(&blob->fRuns[0], skPaint, &viewMatrix, false);
this->internalDrawBMPPosText(blob, 0, cache, skPaint, paint.getColor(), viewMatrix, text,
@ -1090,7 +1044,7 @@ void GrAtlasTextContext::bmpAppendGlyph(GrAtlasTextBlob* blob, int runIndex,
run.fInitialized = true;
size_t vertexStride = get_vertex_stride(format);
size_t vertexStride = GrAtlasTextBatch::GetVertexStride(format);
SkRect r;
r.fLeft = SkIntToScalar(x);
@ -1168,7 +1122,8 @@ bool GrAtlasTextContext::dfAppendGlyph(GrAtlasTextBlob* blob, int runIndex,
SkASSERT(glyph->fMaskFormat == kA8_GrMaskFormat);
subRun->fMaskFormat = kA8_GrMaskFormat;
size_t vertexStride = get_vertex_stride_df(kA8_GrMaskFormat, subRun->fUseLCDText);
size_t vertexStride = GrAtlasTextBatch::GetVertexStrideDf(kA8_GrMaskFormat,
subRun->fUseLCDText);
bool useColorVerts = !subRun->fUseLCDText;
this->appendGlyphCommon(blob, &run, subRun, glyphRect, color, vertexStride, useColorVerts,
@ -1251,645 +1206,9 @@ inline void GrAtlasTextContext::appendGlyphCommon(GrAtlasTextBlob* blob, Run* ru
}
subRun->fGlyphEndIndex++;
subRun->fVertexEndIndex += vertexStride * kVerticesPerGlyph;
subRun->fVertexEndIndex += vertexStride * GrAtlasTextBatch::kVerticesPerGlyph;
}
class TextBatch : public GrVertexBatch {
public:
DEFINE_BATCH_CLASS_ID
typedef GrAtlasTextContext::DistanceAdjustTable DistanceAdjustTable;
typedef GrAtlasTextBlob Blob;
typedef Blob::Run Run;
typedef Run::SubRunInfo TextInfo;
struct Geometry {
Blob* fBlob;
int fRun;
int fSubRun;
GrColor fColor;
SkScalar fTransX;
SkScalar fTransY;
};
static TextBatch* CreateBitmap(GrMaskFormat maskFormat, int glyphCount,
GrBatchFontCache* fontCache) {
TextBatch* batch = new TextBatch;
batch->fFontCache = fontCache;
switch (maskFormat) {
case kA8_GrMaskFormat:
batch->fMaskType = kGrayscaleCoverageMask_MaskType;
break;
case kA565_GrMaskFormat:
batch->fMaskType = kLCDCoverageMask_MaskType;
break;
case kARGB_GrMaskFormat:
batch->fMaskType = kColorBitmapMask_MaskType;
break;
}
batch->fBatch.fNumGlyphs = glyphCount;
batch->fGeoCount = 1;
batch->fFilteredColor = 0;
batch->fFontCache = fontCache;
batch->fUseBGR = false;
return batch;
}
static TextBatch* CreateDistanceField(int glyphCount, GrBatchFontCache* fontCache,
const DistanceAdjustTable* distanceAdjustTable,
SkColor filteredColor, bool isLCD,
bool useBGR) {
TextBatch* batch = new TextBatch;
batch->fFontCache = fontCache;
batch->fMaskType = isLCD ? kLCDDistanceField_MaskType : kGrayscaleDistanceField_MaskType;
batch->fDistanceAdjustTable.reset(SkRef(distanceAdjustTable));
batch->fFilteredColor = filteredColor;
batch->fUseBGR = useBGR;
batch->fBatch.fNumGlyphs = glyphCount;
batch->fGeoCount = 1;
return batch;
}
// to avoid even the initial copy of the struct, we have a getter for the first item which
// is used to seed the batch with its initial geometry. After seeding, the client should call
// init() so the Batch can initialize itself
Geometry& geometry() { return fGeoData[0]; }
void init() {
const Geometry& geo = fGeoData[0];
fBatch.fColor = geo.fColor;
fBatch.fViewMatrix = geo.fBlob->fViewMatrix;
// We don't yet position distance field text on the cpu, so we have to map the vertex bounds
// into device space
const Run& run = geo.fBlob->fRuns[geo.fRun];
if (run.fSubRunInfo[geo.fSubRun].fDrawAsDistanceFields) {
SkRect bounds = run.fVertexBounds;
fBatch.fViewMatrix.mapRect(&bounds);
this->setBounds(bounds);
} else {
this->setBounds(run.fVertexBounds);
}
}
const char* name() const override { return "TextBatch"; }
SkString dumpInfo() const override {
SkString str;
for (int i = 0; i < fGeoCount; ++i) {
str.appendf("%d: Color: 0x%08x Trans: %.2f,%.2f Runs: %d\n",
i,
fGeoData[i].fColor,
fGeoData[i].fTransX,
fGeoData[i].fTransY,
fGeoData[i].fBlob->fRunCount);
}
str.append(INHERITED::dumpInfo());
return str;
}
void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
if (kColorBitmapMask_MaskType == fMaskType) {
out->setUnknownFourComponents();
} else {
out->setKnownFourComponents(fBatch.fColor);
}
}
void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
switch (fMaskType) {
case kGrayscaleDistanceField_MaskType:
case kGrayscaleCoverageMask_MaskType:
out->setUnknownSingleComponent();
break;
case kLCDCoverageMask_MaskType:
case kLCDDistanceField_MaskType:
out->setUnknownOpaqueFourComponents();
out->setUsingLCDCoverage();
break;
case kColorBitmapMask_MaskType:
out->setKnownSingleComponent(0xff);
}
}
private:
void initBatchTracker(const GrPipelineOptimizations& opt) override {
// Handle any color overrides
if (!opt.readsColor()) {
fGeoData[0].fColor = GrColor_ILLEGAL;
}
opt.getOverrideColorIfSet(&fGeoData[0].fColor);
// setup batch properties
fBatch.fColorIgnored = !opt.readsColor();
fBatch.fColor = fGeoData[0].fColor;
fBatch.fUsesLocalCoords = opt.readsLocalCoords();
fBatch.fCoverageIgnored = !opt.readsCoverage();
}
struct FlushInfo {
SkAutoTUnref<const GrVertexBuffer> fVertexBuffer;
SkAutoTUnref<const GrIndexBuffer> fIndexBuffer;
int fGlyphsToFlush;
int fVertexOffset;
};
void onPrepareDraws(Target* target) override {
// if we have RGB, then we won't have any SkShaders so no need to use a localmatrix.
// TODO actually only invert if we don't have RGBA
SkMatrix localMatrix;
if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) {
SkDebugf("Cannot invert viewmatrix\n");
return;
}
GrTexture* texture = fFontCache->getTexture(this->maskFormat());
if (!texture) {
SkDebugf("Could not allocate backing texture for atlas\n");
return;
}
bool usesDistanceFields = this->usesDistanceFields();
GrMaskFormat maskFormat = this->maskFormat();
bool isLCD = this->isLCD();
SkAutoTUnref<const GrGeometryProcessor> gp;
if (usesDistanceFields) {
gp.reset(this->setupDfProcessor(this->viewMatrix(), fFilteredColor, this->color(),
texture));
} else {
GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
gp.reset(GrBitmapTextGeoProc::Create(this->color(),
texture,
params,
maskFormat,
localMatrix,
this->usesLocalCoords()));
}
FlushInfo flushInfo;
flushInfo.fGlyphsToFlush = 0;
size_t vertexStride = gp->getVertexStride();
SkASSERT(vertexStride == (usesDistanceFields ?
get_vertex_stride_df(maskFormat, isLCD) :
get_vertex_stride(maskFormat)));
target->initDraw(gp, this->pipeline());
int glyphCount = this->numGlyphs();
const GrVertexBuffer* vertexBuffer;
void* vertices = target->makeVertexSpace(vertexStride,
glyphCount * kVerticesPerGlyph,
&vertexBuffer,
&flushInfo.fVertexOffset);
flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer));
flushInfo.fIndexBuffer.reset(target->resourceProvider()->refQuadIndexBuffer());
if (!vertices || !flushInfo.fVertexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
unsigned char* currVertex = reinterpret_cast<unsigned char*>(vertices);
// We cache some values to avoid going to the glyphcache for the same fontScaler twice
// in a row
const SkDescriptor* desc = nullptr;
SkGlyphCache* cache = nullptr;
GrFontScaler* scaler = nullptr;
SkTypeface* typeface = nullptr;
for (int i = 0; i < fGeoCount; i++) {
Geometry& args = fGeoData[i];
Blob* blob = args.fBlob;
Run& run = blob->fRuns[args.fRun];
TextInfo& info = run.fSubRunInfo[args.fSubRun];
uint64_t currentAtlasGen = fFontCache->atlasGeneration(maskFormat);
bool regenerateTextureCoords = info.fAtlasGeneration != currentAtlasGen ||
info.fStrike->isAbandoned();
bool regenerateColors;
if (usesDistanceFields) {
regenerateColors = !isLCD && run.fColor != args.fColor;
} else {
regenerateColors = kA8_GrMaskFormat == maskFormat && run.fColor != args.fColor;
}
bool regeneratePositions = args.fTransX != 0.f || args.fTransY != 0.f;
int glyphCount = info.fGlyphEndIndex - info.fGlyphStartIndex;
// We regenerate both texture coords and colors in the blob itself, and update the
// atlas generation. If we don't end up purging any unused plots, we can avoid
// regenerating the coords. We could take a finer grained approach to updating texture
// coords but its not clear if the extra bookkeeping would offset any gains.
// To avoid looping over the glyphs twice, we do one loop and conditionally update color
// or coords as needed. One final note, if we have to break a run for an atlas eviction
// then we can't really trust the atlas has all of the correct data. Atlas evictions
// should be pretty rare, so we just always regenerate in those cases
if (regenerateTextureCoords || regenerateColors || regeneratePositions) {
// first regenerate texture coordinates / colors if need be
bool brokenRun = false;
// Because the GrBatchFontCache may evict the strike a blob depends on using for
// generating its texture coords, we have to track whether or not the strike has
// been abandoned. If it hasn't been abandoned, then we can use the GrGlyph*s as is
// otherwise we have to get the new strike, and use that to get the correct glyphs.
// Because we do not have the packed ids, and thus can't look up our glyphs in the
// new strike, we instead keep our ref to the old strike and use the packed ids from
// it. These ids will still be valid as long as we hold the ref. When we are done
// updating our cache of the GrGlyph*s, we drop our ref on the old strike
bool regenerateGlyphs = false;
GrBatchTextStrike* strike = nullptr;
if (regenerateTextureCoords) {
info.fBulkUseToken.reset();
// We can reuse if we have a valid strike and our descriptors / typeface are the
// same. The override descriptor is only for the non distance field text within
// a run
const SkDescriptor* newDesc = (run.fOverrideDescriptor && !usesDistanceFields) ?
run.fOverrideDescriptor->getDesc() :
run.fDescriptor.getDesc();
if (!cache || !SkTypeface::Equal(typeface, run.fTypeface) ||
!(desc->equals(*newDesc))) {
if (cache) {
SkGlyphCache::AttachCache(cache);
}
desc = newDesc;
cache = SkGlyphCache::DetachCache(run.fTypeface, desc);
scaler = GrTextContext::GetGrFontScaler(cache);
strike = info.fStrike;
typeface = run.fTypeface;
}
if (info.fStrike->isAbandoned()) {
regenerateGlyphs = true;
strike = fFontCache->getStrike(scaler);
} else {
strike = info.fStrike;
}
}
for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) {
if (regenerateTextureCoords) {
size_t glyphOffset = glyphIdx + info.fGlyphStartIndex;
GrGlyph* glyph = blob->fGlyphs[glyphOffset];
GrGlyph::PackedID id = glyph->fPackedID;
const SkGlyph& skGlyph = scaler->grToSkGlyph(id);
if (regenerateGlyphs) {
// Get the id from the old glyph, and use the new strike to lookup
// the glyph.
blob->fGlyphs[glyphOffset] = strike->getGlyph(skGlyph, id, maskFormat,
scaler);
}
glyph = blob->fGlyphs[glyphOffset];
SkASSERT(glyph);
SkASSERT(id == glyph->fPackedID);
// We want to be able to assert this but cannot for testing purposes.
// once skbug:4143 has landed we can revist this assert
//SkASSERT(glyph->fMaskFormat == this->maskFormat());
if (!fFontCache->hasGlyph(glyph) &&
!strike->addGlyphToAtlas(target, glyph, scaler, skGlyph, maskFormat)) {
this->flush(target, &flushInfo);
target->initDraw(gp, this->pipeline());
brokenRun = glyphIdx > 0;
SkDEBUGCODE(bool success =) strike->addGlyphToAtlas(target,
glyph,
scaler,
skGlyph,
maskFormat);
SkASSERT(success);
}
fFontCache->addGlyphToBulkAndSetUseToken(&info.fBulkUseToken, glyph,
target->currentToken());
// Texture coords are the last vertex attribute so we get a pointer to the
// first one and then map with stride in regenerateTextureCoords
intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices);
vertex += info.fVertexStartIndex;
vertex += vertexStride * glyphIdx * kVerticesPerGlyph;
vertex += vertexStride - sizeof(SkIPoint16);
this->regenerateTextureCoords(glyph, vertex, vertexStride);
}
if (regenerateColors) {
intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices);
vertex += info.fVertexStartIndex;
vertex += vertexStride * glyphIdx * kVerticesPerGlyph + sizeof(SkPoint);
this->regenerateColors(vertex, vertexStride, args.fColor);
}
if (regeneratePositions) {
intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices);
vertex += info.fVertexStartIndex;
vertex += vertexStride * glyphIdx * kVerticesPerGlyph;
SkScalar transX = args.fTransX;
SkScalar transY = args.fTransY;
this->regeneratePositions(vertex, vertexStride, transX, transY);
}
flushInfo.fGlyphsToFlush++;
}
// We my have changed the color so update it here
run.fColor = args.fColor;
if (regenerateTextureCoords) {
if (regenerateGlyphs) {
info.fStrike.reset(SkRef(strike));
}
info.fAtlasGeneration = brokenRun ? GrBatchAtlas::kInvalidAtlasGeneration :
fFontCache->atlasGeneration(maskFormat);
}
} else {
flushInfo.fGlyphsToFlush += glyphCount;
// set use tokens for all of the glyphs in our subrun. This is only valid if we
// have a valid atlas generation
fFontCache->setUseTokenBulk(info.fBulkUseToken, target->currentToken(), maskFormat);
}
// now copy all vertices
size_t byteCount = info.fVertexEndIndex - info.fVertexStartIndex;
memcpy(currVertex, blob->fVertices + info.fVertexStartIndex, byteCount);
currVertex += byteCount;
}
// Make sure to attach the last cache if applicable
if (cache) {
SkGlyphCache::AttachCache(cache);
}
this->flush(target, &flushInfo);
}
TextBatch() : INHERITED(ClassID()) {} // initialized in factory functions.
~TextBatch() {
for (int i = 0; i < fGeoCount; i++) {
fGeoData[i].fBlob->unref();
}
}
GrMaskFormat maskFormat() const {
switch (fMaskType) {
case kLCDCoverageMask_MaskType:
return kA565_GrMaskFormat;
case kColorBitmapMask_MaskType:
return kARGB_GrMaskFormat;
case kGrayscaleCoverageMask_MaskType:
case kGrayscaleDistanceField_MaskType:
case kLCDDistanceField_MaskType:
return kA8_GrMaskFormat;
}
return kA8_GrMaskFormat; // suppress warning
}
bool usesDistanceFields() const {
return kGrayscaleDistanceField_MaskType == fMaskType ||
kLCDDistanceField_MaskType == fMaskType;
}
bool isLCD() const {
return kLCDCoverageMask_MaskType == fMaskType ||
kLCDDistanceField_MaskType == fMaskType;
}
void regenerateTextureCoords(GrGlyph* glyph, intptr_t vertex, size_t vertexStride) {
int width = glyph->fBounds.width();
int height = glyph->fBounds.height();
int u0, v0, u1, v1;
if (this->usesDistanceFields()) {
u0 = glyph->fAtlasLocation.fX + SK_DistanceFieldInset;
v0 = glyph->fAtlasLocation.fY + SK_DistanceFieldInset;
u1 = u0 + width - 2 * SK_DistanceFieldInset;
v1 = v0 + height - 2 * SK_DistanceFieldInset;
} else {
u0 = glyph->fAtlasLocation.fX;
v0 = glyph->fAtlasLocation.fY;
u1 = u0 + width;
v1 = v0 + height;
}
SkIPoint16* textureCoords;
// V0
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u0, v0);
vertex += vertexStride;
// V1
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u0, v1);
vertex += vertexStride;
// V2
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u1, v1);
vertex += vertexStride;
// V3
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u1, v0);
}
void regenerateColors(intptr_t vertex, size_t vertexStride, GrColor color) {
for (int i = 0; i < kVerticesPerGlyph; i++) {
SkColor* vcolor = reinterpret_cast<SkColor*>(vertex);
*vcolor = color;
vertex += vertexStride;
}
}
void regeneratePositions(intptr_t vertex, size_t vertexStride, SkScalar transX,
SkScalar transY) {
for (int i = 0; i < kVerticesPerGlyph; i++) {
SkPoint* point = reinterpret_cast<SkPoint*>(vertex);
point->fX += transX;
point->fY += transY;
vertex += vertexStride;
}
}
void flush(GrVertexBatch::Target* target, FlushInfo* flushInfo) {
GrVertices vertices;
int maxGlyphsPerDraw = flushInfo->fIndexBuffer->maxQuads();
vertices.initInstanced(kTriangles_GrPrimitiveType, flushInfo->fVertexBuffer,
flushInfo->fIndexBuffer, flushInfo->fVertexOffset,
kVerticesPerGlyph, kIndicesPerGlyph, flushInfo->fGlyphsToFlush,
maxGlyphsPerDraw);
target->draw(vertices);
flushInfo->fVertexOffset += kVerticesPerGlyph * flushInfo->fGlyphsToFlush;
flushInfo->fGlyphsToFlush = 0;
}
GrColor color() const { return fBatch.fColor; }
const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; }
bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
int numGlyphs() const { return fBatch.fNumGlyphs; }
bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override {
TextBatch* that = t->cast<TextBatch>();
if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pipeline(),
that->bounds(), caps)) {
return false;
}
if (fMaskType != that->fMaskType) {
return false;
}
if (!this->usesDistanceFields()) {
// TODO we can often batch across LCD text if we have dual source blending and don't
// have to use the blend constant
if (kGrayscaleCoverageMask_MaskType != fMaskType && this->color() != that->color()) {
return false;
}
if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
return false;
}
} else {
if (!this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
return false;
}
if (fFilteredColor != that->fFilteredColor) {
return false;
}
if (fUseBGR != that->fUseBGR) {
return false;
}
// TODO see note above
if (kLCDDistanceField_MaskType == fMaskType && this->color() != that->color()) {
return false;
}
}
fBatch.fNumGlyphs += that->numGlyphs();
// Reallocate space for geo data if necessary and then import that's geo data.
int newGeoCount = that->fGeoCount + fGeoCount;
// We assume (and here enforce) that the allocation size is the smallest power of two that
// is greater than or equal to the number of geometries (and at least
// kMinGeometryAllocated).
int newAllocSize = GrNextPow2(newGeoCount);
int currAllocSize = SkTMax<int>(kMinGeometryAllocated, GrNextPow2(fGeoCount));
if (newGeoCount > currAllocSize) {
fGeoData.realloc(newAllocSize);
}
memcpy(&fGeoData[fGeoCount], that->fGeoData.get(), that->fGeoCount * sizeof(Geometry));
// We steal the ref on the blobs from the other TextBatch and set its count to 0 so that
// it doesn't try to unref them.
#ifdef SK_DEBUG
for (int i = 0; i < that->fGeoCount; ++i) {
that->fGeoData.get()[i].fBlob = (Blob*)0x1;
}
#endif
that->fGeoCount = 0;
fGeoCount = newGeoCount;
this->joinBounds(that->bounds());
return true;
}
// TODO just use class params
// TODO trying to figure out why lcd is so whack
GrGeometryProcessor* setupDfProcessor(const SkMatrix& viewMatrix, SkColor filteredColor,
GrColor color, GrTexture* texture) {
GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
bool isLCD = this->isLCD();
// set up any flags
uint32_t flags = viewMatrix.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
// see if we need to create a new effect
if (isLCD) {
flags |= kUseLCD_DistanceFieldEffectFlag;
flags |= viewMatrix.rectStaysRect() ? kRectToRect_DistanceFieldEffectFlag : 0;
flags |= fUseBGR ? kBGR_DistanceFieldEffectFlag : 0;
GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
float redCorrection =
(*fDistanceAdjustTable)[GrColorUnpackR(colorNoPreMul) >> kDistanceAdjustLumShift];
float greenCorrection =
(*fDistanceAdjustTable)[GrColorUnpackG(colorNoPreMul) >> kDistanceAdjustLumShift];
float blueCorrection =
(*fDistanceAdjustTable)[GrColorUnpackB(colorNoPreMul) >> kDistanceAdjustLumShift];
GrDistanceFieldLCDTextGeoProc::DistanceAdjust widthAdjust =
GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(redCorrection,
greenCorrection,
blueCorrection);
return GrDistanceFieldLCDTextGeoProc::Create(color,
viewMatrix,
texture,
params,
widthAdjust,
flags,
this->usesLocalCoords());
} else {
flags |= kColorAttr_DistanceFieldEffectFlag;
#ifdef SK_GAMMA_APPLY_TO_A8
U8CPU lum = SkColorSpaceLuminance::computeLuminance(SK_GAMMA_EXPONENT, filteredColor);
float correction = (*fDistanceAdjustTable)[lum >> kDistanceAdjustLumShift];
return GrDistanceFieldA8TextGeoProc::Create(color,
viewMatrix,
texture,
params,
correction,
flags,
this->usesLocalCoords());
#else
return GrDistanceFieldA8TextGeoProc::Create(color,
viewMatrix,
texture,
params,
flags,
this->usesLocalCoords());
#endif
}
}
struct BatchTracker {
GrColor fColor;
SkMatrix fViewMatrix;
bool fUsesLocalCoords;
bool fColorIgnored;
bool fCoverageIgnored;
int fNumGlyphs;
};
BatchTracker fBatch;
// The minimum number of Geometry we will try to allocate.
enum { kMinGeometryAllocated = 4 };
SkAutoSTMalloc<kMinGeometryAllocated, Geometry> fGeoData;
int fGeoCount;
enum MaskType {
kGrayscaleCoverageMask_MaskType,
kLCDCoverageMask_MaskType,
kColorBitmapMask_MaskType,
kGrayscaleDistanceField_MaskType,
kLCDDistanceField_MaskType,
} fMaskType;
bool fUseBGR; // fold this into the enum?
GrBatchFontCache* fFontCache;
// Distance field properties
SkAutoTUnref<const DistanceAdjustTable> fDistanceAdjustTable;
SkColor fFilteredColor;
typedef GrVertexBatch INHERITED;
};
void GrAtlasTextContext::flushRunAsPaths(GrDrawContext* dc, GrRenderTarget* rt,
const SkTextBlobRunIterator& it,
const GrClip& clip, const SkPaint& skPaint,
@ -1942,7 +1261,7 @@ GrAtlasTextContext::createBatch(GrAtlasTextBlob* cacheBlob, const PerSubRunInfo&
subRunColor = color;
}
TextBatch* batch;
GrAtlasTextBatch* batch;
if (info.fDrawAsDistanceFields) {
SkColor filteredColor;
SkColorFilter* colorFilter = skPaint.getColorFilter();
@ -1952,13 +1271,13 @@ GrAtlasTextContext::createBatch(GrAtlasTextBlob* cacheBlob, const PerSubRunInfo&
filteredColor = skPaint.getColor();
}
bool useBGR = SkPixelGeometryIsBGR(fSurfaceProps.pixelGeometry());
batch = TextBatch::CreateDistanceField(glyphCount, fContext->getBatchFontCache(),
fDistanceAdjustTable, filteredColor,
info.fUseLCDText, useBGR);
batch = GrAtlasTextBatch::CreateDistanceField(glyphCount, fContext->getBatchFontCache(),
fDistanceAdjustTable, filteredColor,
info.fUseLCDText, useBGR);
} else {
batch = TextBatch::CreateBitmap(format, glyphCount, fContext->getBatchFontCache());
batch = GrAtlasTextBatch::CreateBitmap(format, glyphCount, fContext->getBatchFontCache());
}
TextBatch::Geometry& geometry = batch->geometry();
GrAtlasTextBatch::Geometry& geometry = batch->geometry();
geometry.fBlob = SkRef(cacheBlob);
geometry.fRun = run;
geometry.fSubRun = subRun;

3
src/gpu/GrAtlasTextContext.h
View File

@ -27,7 +27,6 @@ class SkGlyph;
/*
* This class implements GrTextContext using standard bitmap fonts, and can also process textblobs.
* TODO replace GrBitmapTextContext
*/
class GrAtlasTextContext : public GrTextContext {
public:
@ -184,7 +183,7 @@ private:
SkAutoTUnref<const DistanceAdjustTable> fDistanceAdjustTable;
friend class GrTextBlobCache;
friend class TextBatch;
friend class GrAtlasTextBatch;
#ifdef GR_TEST_UTILS
DRAW_BATCH_TEST_FRIEND(TextBlobBatch);

2
src/gpu/GrTextContext.h
View File

@ -82,7 +82,7 @@ protected:
const char text[], size_t byteLength, SkVector* stopVector);
static uint32_t FilterTextFlags(const SkSurfaceProps& surfaceProps, const SkPaint& paint);
friend class TextBatch;
friend class GrAtlasTextBatch;
};
#endif

507
src/gpu/batches/GrAtlasTextBatch.cpp Normal file
View File

@ -0,0 +1,507 @@
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrAtlasTextBatch.h"
#include "GrBatchFontCache.h"
#include "GrBatchFlushState.h"
#include "GrBatchTest.h"
#include "GrResourceProvider.h"
#include "SkDistanceFieldGen.h"
#include "SkGlyphCache.h"
#include "effects/GrBitmapTextGeoProc.h"
#include "effects/GrDistanceFieldGeoProc.h"
static inline GrColor skcolor_to_grcolor_nopremultiply(SkColor c) {
unsigned r = SkColorGetR(c);
unsigned g = SkColorGetG(c);
unsigned b = SkColorGetB(c);
return GrColorPackRGBA(r, g, b, 0xff);
}
static const int kDistanceAdjustLumShift = 5;
SkString GrAtlasTextBatch::dumpInfo() const {
SkString str;
for (int i = 0; i < fGeoCount; ++i) {
str.appendf("%d: Color: 0x%08x Trans: %.2f,%.2f Runs: %d\n",
i,
fGeoData[i].fColor,
fGeoData[i].fTransX,
fGeoData[i].fTransY,
fGeoData[i].fBlob->fRunCount);
}
str.append(INHERITED::dumpInfo());
return str;
}
void GrAtlasTextBatch::getInvariantOutputColor(GrInitInvariantOutput* out) const {
if (kColorBitmapMask_MaskType == fMaskType) {
out->setUnknownFourComponents();
} else {
out->setKnownFourComponents(fBatch.fColor);
}
}
void GrAtlasTextBatch::getInvariantOutputCoverage(GrInitInvariantOutput* out) const {
switch (fMaskType) {
case kGrayscaleDistanceField_MaskType:
case kGrayscaleCoverageMask_MaskType:
out->setUnknownSingleComponent();
break;
case kLCDCoverageMask_MaskType:
case kLCDDistanceField_MaskType:
out->setUnknownOpaqueFourComponents();
out->setUsingLCDCoverage();
break;
case kColorBitmapMask_MaskType:
out->setKnownSingleComponent(0xff);
}
}
void GrAtlasTextBatch::initBatchTracker(const GrPipelineOptimizations& opt) {
// Handle any color overrides
if (!opt.readsColor()) {
fGeoData[0].fColor = GrColor_ILLEGAL;
}
opt.getOverrideColorIfSet(&fGeoData[0].fColor);
// setup batch properties
fBatch.fColorIgnored = !opt.readsColor();
fBatch.fColor = fGeoData[0].fColor;
fBatch.fUsesLocalCoords = opt.readsLocalCoords();
fBatch.fCoverageIgnored = !opt.readsCoverage();
}
void GrAtlasTextBatch::onPrepareDraws(Target* target) {
// if we have RGB, then we won't have any SkShaders so no need to use a localmatrix.
// TODO actually only invert if we don't have RGBA
SkMatrix localMatrix;
if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) {
SkDebugf("Cannot invert viewmatrix\n");
return;
}
GrTexture* texture = fFontCache->getTexture(this->maskFormat());
if (!texture) {
SkDebugf("Could not allocate backing texture for atlas\n");
return;
}
bool usesDistanceFields = this->usesDistanceFields();
GrMaskFormat maskFormat = this->maskFormat();
bool isLCD = this->isLCD();
SkAutoTUnref<const GrGeometryProcessor> gp;
if (usesDistanceFields) {
gp.reset(this->setupDfProcessor(this->viewMatrix(), fFilteredColor, this->color(),
texture));
} else {
GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
gp.reset(GrBitmapTextGeoProc::Create(this->color(),
texture,
params,
maskFormat,
localMatrix,
this->usesLocalCoords()));
}
FlushInfo flushInfo;
flushInfo.fGlyphsToFlush = 0;
size_t vertexStride = gp->getVertexStride();
SkASSERT(vertexStride == (usesDistanceFields ?
GetVertexStrideDf(maskFormat, isLCD) :
GetVertexStride(maskFormat)));
target->initDraw(gp, this->pipeline());
int glyphCount = this->numGlyphs();
const GrVertexBuffer* vertexBuffer;
void* vertices = target->makeVertexSpace(vertexStride,
glyphCount * kVerticesPerGlyph,
&vertexBuffer,
&flushInfo.fVertexOffset);
flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer));
flushInfo.fIndexBuffer.reset(target->resourceProvider()->refQuadIndexBuffer());
if (!vertices || !flushInfo.fVertexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
unsigned char* currVertex = reinterpret_cast<unsigned char*>(vertices);
// We cache some values to avoid going to the glyphcache for the same fontScaler twice
// in a row
const SkDescriptor* desc = nullptr;
SkGlyphCache* cache = nullptr;
GrFontScaler* scaler = nullptr;
SkTypeface* typeface = nullptr;
for (int i = 0; i < fGeoCount; i++) {
Geometry& args = fGeoData[i];
Blob* blob = args.fBlob;
Run& run = blob->fRuns[args.fRun];
TextInfo& info = run.fSubRunInfo[args.fSubRun];
uint64_t currentAtlasGen = fFontCache->atlasGeneration(maskFormat);
bool regenerateTextureCoords = info.fAtlasGeneration != currentAtlasGen ||
info.fStrike->isAbandoned();
bool regenerateColors;
if (usesDistanceFields) {
regenerateColors = !isLCD && run.fColor != args.fColor;
} else {
regenerateColors = kA8_GrMaskFormat == maskFormat && run.fColor != args.fColor;
}
bool regeneratePositions = args.fTransX != 0.f || args.fTransY != 0.f;
int glyphCount = info.fGlyphEndIndex - info.fGlyphStartIndex;
// We regenerate both texture coords and colors in the blob itself, and update the
// atlas generation. If we don't end up purging any unused plots, we can avoid
// regenerating the coords. We could take a finer grained approach to updating texture
// coords but its not clear if the extra bookkeeping would offset any gains.
// To avoid looping over the glyphs twice, we do one loop and conditionally update color
// or coords as needed. One final note, if we have to break a run for an atlas eviction
// then we can't really trust the atlas has all of the correct data. Atlas evictions
// should be pretty rare, so we just always regenerate in those cases
if (regenerateTextureCoords || regenerateColors || regeneratePositions) {
// first regenerate texture coordinates / colors if need be
bool brokenRun = false;
// Because the GrBatchFontCache may evict the strike a blob depends on using for
// generating its texture coords, we have to track whether or not the strike has
// been abandoned. If it hasn't been abandoned, then we can use the GrGlyph*s as is
// otherwise we have to get the new strike, and use that to get the correct glyphs.
// Because we do not have the packed ids, and thus can't look up our glyphs in the
// new strike, we instead keep our ref to the old strike and use the packed ids from
// it. These ids will still be valid as long as we hold the ref. When we are done
// updating our cache of the GrGlyph*s, we drop our ref on the old strike
bool regenerateGlyphs = false;
GrBatchTextStrike* strike = nullptr;
if (regenerateTextureCoords) {
info.fBulkUseToken.reset();
// We can reuse if we have a valid strike and our descriptors / typeface are the
// same. The override descriptor is only for the non distance field text within
// a run
const SkDescriptor* newDesc = (run.fOverrideDescriptor && !usesDistanceFields) ?
run.fOverrideDescriptor->getDesc() :
run.fDescriptor.getDesc();
if (!cache || !SkTypeface::Equal(typeface, run.fTypeface) ||
!(desc->equals(*newDesc))) {
if (cache) {
SkGlyphCache::AttachCache(cache);
}
desc = newDesc;
cache = SkGlyphCache::DetachCache(run.fTypeface, desc);
scaler = GrTextContext::GetGrFontScaler(cache);
strike = info.fStrike;
typeface = run.fTypeface;
}
if (info.fStrike->isAbandoned()) {
regenerateGlyphs = true;
strike = fFontCache->getStrike(scaler);
} else {
strike = info.fStrike;
}
}
for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) {
if (regenerateTextureCoords) {
size_t glyphOffset = glyphIdx + info.fGlyphStartIndex;
GrGlyph* glyph = blob->fGlyphs[glyphOffset];
GrGlyph::PackedID id = glyph->fPackedID;
const SkGlyph& skGlyph = scaler->grToSkGlyph(id);
if (regenerateGlyphs) {
// Get the id from the old glyph, and use the new strike to lookup
// the glyph.
blob->fGlyphs[glyphOffset] = strike->getGlyph(skGlyph, id, maskFormat,
scaler);
}
glyph = blob->fGlyphs[glyphOffset];
SkASSERT(glyph);
SkASSERT(id == glyph->fPackedID);
// We want to be able to assert this but cannot for testing purposes.
// once skbug:4143 has landed we can revist this assert
//SkASSERT(glyph->fMaskFormat == this->maskFormat());
if (!fFontCache->hasGlyph(glyph) &&
!strike->addGlyphToAtlas(target, glyph, scaler, skGlyph, maskFormat)) {
this->flush(target, &flushInfo);
target->initDraw(gp, this->pipeline());
brokenRun = glyphIdx > 0;
SkDEBUGCODE(bool success =) strike->addGlyphToAtlas(target,
glyph,
scaler,
skGlyph,
maskFormat);
SkASSERT(success);
}
fFontCache->addGlyphToBulkAndSetUseToken(&info.fBulkUseToken, glyph,
target->currentToken());
// Texture coords are the last vertex attribute so we get a pointer to the
// first one and then map with stride in regenerateTextureCoords
intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices);
vertex += info.fVertexStartIndex;
vertex += vertexStride * glyphIdx * kVerticesPerGlyph;
vertex += vertexStride - sizeof(SkIPoint16);
this->regenerateTextureCoords(glyph, vertex, vertexStride);
}
if (regenerateColors) {
intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices);
vertex += info.fVertexStartIndex;
vertex += vertexStride * glyphIdx * kVerticesPerGlyph + sizeof(SkPoint);
this->regenerateColors(vertex, vertexStride, args.fColor);
}
if (regeneratePositions) {
intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices);
vertex += info.fVertexStartIndex;
vertex += vertexStride * glyphIdx * kVerticesPerGlyph;
SkScalar transX = args.fTransX;
SkScalar transY = args.fTransY;
this->regeneratePositions(vertex, vertexStride, transX, transY);
}
flushInfo.fGlyphsToFlush++;
}
// We my have changed the color so update it here
run.fColor = args.fColor;
if (regenerateTextureCoords) {
if (regenerateGlyphs) {
info.fStrike.reset(SkRef(strike));
}
info.fAtlasGeneration = brokenRun ? GrBatchAtlas::kInvalidAtlasGeneration :
fFontCache->atlasGeneration(maskFormat);
}
} else {
flushInfo.fGlyphsToFlush += glyphCount;
// set use tokens for all of the glyphs in our subrun. This is only valid if we
// have a valid atlas generation
fFontCache->setUseTokenBulk(info.fBulkUseToken, target->currentToken(), maskFormat);
}
// now copy all vertices
size_t byteCount = info.fVertexEndIndex - info.fVertexStartIndex;
memcpy(currVertex, blob->fVertices + info.fVertexStartIndex, byteCount);
currVertex += byteCount;
}
// Make sure to attach the last cache if applicable
if (cache) {
SkGlyphCache::AttachCache(cache);
}
this->flush(target, &flushInfo);
}
void GrAtlasTextBatch::regenerateTextureCoords(GrGlyph* glyph, intptr_t vertex,
size_t vertexStride) {
int width = glyph->fBounds.width();
int height = glyph->fBounds.height();
int u0, v0, u1, v1;
if (this->usesDistanceFields()) {
u0 = glyph->fAtlasLocation.fX + SK_DistanceFieldInset;
v0 = glyph->fAtlasLocation.fY + SK_DistanceFieldInset;
u1 = u0 + width - 2 * SK_DistanceFieldInset;
v1 = v0 + height - 2 * SK_DistanceFieldInset;
} else {
u0 = glyph->fAtlasLocation.fX;
v0 = glyph->fAtlasLocation.fY;
u1 = u0 + width;
v1 = v0 + height;
}
SkIPoint16* textureCoords;
// V0
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u0, v0);
vertex += vertexStride;
// V1
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u0, v1);
vertex += vertexStride;
// V2
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u1, v1);
vertex += vertexStride;
// V3
textureCoords = reinterpret_cast<SkIPoint16*>(vertex);
textureCoords->set(u1, v0);
}
void GrAtlasTextBatch::regenerateColors(intptr_t vertex, size_t vertexStride, GrColor color) {
for (int i = 0; i < kVerticesPerGlyph; i++) {
SkColor* vcolor = reinterpret_cast<SkColor*>(vertex);
*vcolor = color;
vertex += vertexStride;
}
}
void GrAtlasTextBatch::regeneratePositions(intptr_t vertex, size_t vertexStride, SkScalar transX,
SkScalar transY) {
for (int i = 0; i < kVerticesPerGlyph; i++) {
SkPoint* point = reinterpret_cast<SkPoint*>(vertex);
point->fX += transX;
point->fY += transY;
vertex += vertexStride;
}
}
void GrAtlasTextBatch::flush(GrVertexBatch::Target* target, FlushInfo* flushInfo) {
GrVertices vertices;
int maxGlyphsPerDraw = flushInfo->fIndexBuffer->maxQuads();
vertices.initInstanced(kTriangles_GrPrimitiveType, flushInfo->fVertexBuffer,
flushInfo->fIndexBuffer, flushInfo->fVertexOffset,
kVerticesPerGlyph, kIndicesPerGlyph, flushInfo->fGlyphsToFlush,
maxGlyphsPerDraw);
target->draw(vertices);
flushInfo->fVertexOffset += kVerticesPerGlyph * flushInfo->fGlyphsToFlush;
flushInfo->fGlyphsToFlush = 0;
}
bool GrAtlasTextBatch::onCombineIfPossible(GrBatch* t, const GrCaps& caps) {
GrAtlasTextBatch* that = t->cast<GrAtlasTextBatch>();
if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pipeline(),
that->bounds(), caps)) {
return false;
}
if (fMaskType != that->fMaskType) {
return false;
}
if (!this->usesDistanceFields()) {
// TODO we can often batch across LCD text if we have dual source blending and don't
// have to use the blend constant
if (kGrayscaleCoverageMask_MaskType != fMaskType && this->color() != that->color()) {
return false;
}
if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
return false;
}
} else {
if (!this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
return false;
}
if (fFilteredColor != that->fFilteredColor) {
return false;
}
if (fUseBGR != that->fUseBGR) {
return false;
}
// TODO see note above
if (kLCDDistanceField_MaskType == fMaskType && this->color() != that->color()) {
return false;
}
}
fBatch.fNumGlyphs += that->numGlyphs();
// Reallocate space for geo data if necessary and then import that's geo data.
int newGeoCount = that->fGeoCount + fGeoCount;
// We assume (and here enforce) that the allocation size is the smallest power of two that
// is greater than or equal to the number of geometries (and at least
// kMinGeometryAllocated).
int newAllocSize = GrNextPow2(newGeoCount);
int currAllocSize = SkTMax<int>(kMinGeometryAllocated, GrNextPow2(fGeoCount));
if (newGeoCount > currAllocSize) {
fGeoData.realloc(newAllocSize);
}
memcpy(&fGeoData[fGeoCount], that->fGeoData.get(), that->fGeoCount * sizeof(Geometry));
// We steal the ref on the blobs from the other TextBatch and set its count to 0 so that
// it doesn't try to unref them.
#ifdef SK_DEBUG
for (int i = 0; i < that->fGeoCount; ++i) {
that->fGeoData.get()[i].fBlob = (Blob*)0x1;
}
#endif
that->fGeoCount = 0;
fGeoCount = newGeoCount;
this->joinBounds(that->bounds());
return true;
}
// TODO just use class params
// TODO trying to figure out why lcd is so whack
GrGeometryProcessor* GrAtlasTextBatch::setupDfProcessor(const SkMatrix& viewMatrix,
SkColor filteredColor,
GrColor color, GrTexture* texture) {
GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
bool isLCD = this->isLCD();
// set up any flags
uint32_t flags = viewMatrix.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
// see if we need to create a new effect
if (isLCD) {
flags |= kUseLCD_DistanceFieldEffectFlag;
flags |= viewMatrix.rectStaysRect() ? kRectToRect_DistanceFieldEffectFlag : 0;
flags |= fUseBGR ? kBGR_DistanceFieldEffectFlag : 0;
GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
float redCorrection =
(*fDistanceAdjustTable)[GrColorUnpackR(colorNoPreMul) >> kDistanceAdjustLumShift];
float greenCorrection =
(*fDistanceAdjustTable)[GrColorUnpackG(colorNoPreMul) >> kDistanceAdjustLumShift];
float blueCorrection =
(*fDistanceAdjustTable)[GrColorUnpackB(colorNoPreMul) >> kDistanceAdjustLumShift];
GrDistanceFieldLCDTextGeoProc::DistanceAdjust widthAdjust =
GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(redCorrection,
greenCorrection,
blueCorrection);
return GrDistanceFieldLCDTextGeoProc::Create(color,
viewMatrix,
texture,
params,
widthAdjust,
flags,
this->usesLocalCoords());
} else {
flags |= kColorAttr_DistanceFieldEffectFlag;
#ifdef SK_GAMMA_APPLY_TO_A8
U8CPU lum = SkColorSpaceLuminance::computeLuminance(SK_GAMMA_EXPONENT, filteredColor);
float correction = (*fDistanceAdjustTable)[lum >> kDistanceAdjustLumShift];
return GrDistanceFieldA8TextGeoProc::Create(color,
viewMatrix,
texture,
params,
correction,
flags,
this->usesLocalCoords());
#else
return GrDistanceFieldA8TextGeoProc::Create(color,
viewMatrix,
texture,
params,
flags,
this->usesLocalCoords());
#endif
}
}

227
src/gpu/batches/GrAtlasTextBatch.h Normal file
View File

@ -0,0 +1,227 @@
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrAtlasTextBatch_DEFINED
#define GrAtlasTextBatch_DEFINED
#include "batches/GrVertexBatch.h"
#include "GrAtlasTextContext.h"
class GrAtlasTextBatch : public GrVertexBatch {
public:
DEFINE_BATCH_CLASS_ID
static const size_t kLCDTextVASize = sizeof(SkPoint) + sizeof(SkIPoint16);
// position + local coord
static const size_t kColorTextVASize = sizeof(SkPoint) + sizeof(SkIPoint16);
static const size_t kGrayTextVASize = sizeof(SkPoint) + sizeof(GrColor) + sizeof(SkIPoint16);
static const int kVerticesPerGlyph = 4;
static const int kIndicesPerGlyph = 6;
typedef GrAtlasTextContext::DistanceAdjustTable DistanceAdjustTable;
typedef GrAtlasTextBlob Blob;
typedef Blob::Run Run;
typedef Run::SubRunInfo TextInfo;
struct Geometry {
Blob* fBlob;
int fRun;
int fSubRun;
GrColor fColor;
SkScalar fTransX;
SkScalar fTransY;
};
static GrAtlasTextBatch* CreateBitmap(GrMaskFormat maskFormat, int glyphCount,
GrBatchFontCache* fontCache) {
GrAtlasTextBatch* batch = new GrAtlasTextBatch;
batch->fFontCache = fontCache;
switch (maskFormat) {
case kA8_GrMaskFormat:
batch->fMaskType = kGrayscaleCoverageMask_MaskType;
break;
case kA565_GrMaskFormat:
batch->fMaskType = kLCDCoverageMask_MaskType;
break;
case kARGB_GrMaskFormat:
batch->fMaskType = kColorBitmapMask_MaskType;
break;
}
batch->fBatch.fNumGlyphs = glyphCount;
batch->fGeoCount = 1;
batch->fFilteredColor = 0;
batch->fFontCache = fontCache;
batch->fUseBGR = false;
return batch;
}
static GrAtlasTextBatch* CreateDistanceField(int glyphCount, GrBatchFontCache* fontCache,
const DistanceAdjustTable* distanceAdjustTable,
SkColor filteredColor, bool isLCD,
bool useBGR) {
GrAtlasTextBatch* batch = new GrAtlasTextBatch;
batch->fFontCache = fontCache;
batch->fMaskType = isLCD ? kLCDDistanceField_MaskType : kGrayscaleDistanceField_MaskType;
batch->fDistanceAdjustTable.reset(SkRef(distanceAdjustTable));
batch->fFilteredColor = filteredColor;
batch->fUseBGR = useBGR;
batch->fBatch.fNumGlyphs = glyphCount;
batch->fGeoCount = 1;
return batch;
}
// to avoid even the initial copy of the struct, we have a getter for the first item which
// is used to seed the batch with its initial geometry. After seeding, the client should call
// init() so the Batch can initialize itself
Geometry& geometry() { return fGeoData[0]; }
void init() {
const Geometry& geo = fGeoData[0];
fBatch.fColor = geo.fColor;
fBatch.fViewMatrix = geo.fBlob->fViewMatrix;
// We don't yet position distance field text on the cpu, so we have to map the vertex bounds
// into device space
const Run& run = geo.fBlob->fRuns[geo.fRun];
if (run.fSubRunInfo[geo.fSubRun].fDrawAsDistanceFields) {
SkRect bounds = run.fVertexBounds;
fBatch.fViewMatrix.mapRect(&bounds);
this->setBounds(bounds);
} else {
this->setBounds(run.fVertexBounds);
}
}
const char* name() const override { return "TextBatch"; }
SkString dumpInfo() const override;
void getInvariantOutputColor(GrInitInvariantOutput* out) const override;
void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override;
static size_t GetVertexStride(GrMaskFormat maskFormat) {
switch (maskFormat) {
case kA8_GrMaskFormat:
return kGrayTextVASize;
case kARGB_GrMaskFormat:
return kColorTextVASize;
default:
return kLCDTextVASize;
}
}
static size_t GetVertexStrideDf(GrMaskFormat maskFormat, bool useLCDText) {
SkASSERT(maskFormat == kA8_GrMaskFormat);
if (useLCDText) {
return kLCDTextVASize;
} else {
return kGrayTextVASize;
}
}
private:
void initBatchTracker(const GrPipelineOptimizations& opt) override;
struct FlushInfo {
SkAutoTUnref<const GrVertexBuffer> fVertexBuffer;
SkAutoTUnref<const GrIndexBuffer> fIndexBuffer;
int fGlyphsToFlush;
int fVertexOffset;
};
void onPrepareDraws(Target* target) override;
GrAtlasTextBatch() : INHERITED(ClassID()) {} // initialized in factory functions.
~GrAtlasTextBatch() {
for (int i = 0; i < fGeoCount; i++) {
fGeoData[i].fBlob->unref();
}
}
GrMaskFormat maskFormat() const {
switch (fMaskType) {
case kLCDCoverageMask_MaskType:
return kA565_GrMaskFormat;
case kColorBitmapMask_MaskType:
return kARGB_GrMaskFormat;
case kGrayscaleCoverageMask_MaskType:
case kGrayscaleDistanceField_MaskType:
case kLCDDistanceField_MaskType:
return kA8_GrMaskFormat;
}
return kA8_GrMaskFormat; // suppress warning
}
bool usesDistanceFields() const {
return kGrayscaleDistanceField_MaskType == fMaskType ||
kLCDDistanceField_MaskType == fMaskType;
}
bool isLCD() const {
return kLCDCoverageMask_MaskType == fMaskType ||
kLCDDistanceField_MaskType == fMaskType;
}
inline void regenerateTextureCoords(GrGlyph* glyph, intptr_t vertex, size_t vertexStride);
inline void regenerateColors(intptr_t vertex, size_t vertexStride, GrColor color);
inline void regeneratePositions(intptr_t vertex, size_t vertexStride, SkScalar transX,
SkScalar transY);
inline void flush(GrVertexBatch::Target* target, FlushInfo* flushInfo);
GrColor color() const { return fBatch.fColor; }
const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; }
bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
int numGlyphs() const { return fBatch.fNumGlyphs; }
bool onCombineIfPossible(GrBatch* t, const GrCaps& caps) override;
// TODO just use class params
// TODO trying to figure out why lcd is so whack
GrGeometryProcessor* setupDfProcessor(const SkMatrix& viewMatrix, SkColor filteredColor,
GrColor color, GrTexture* texture);
struct BatchTracker {
GrColor fColor;
SkMatrix fViewMatrix;
bool fUsesLocalCoords;
bool fColorIgnored;
bool fCoverageIgnored;
int fNumGlyphs;
};
BatchTracker fBatch;
// The minimum number of Geometry we will try to allocate.
enum { kMinGeometryAllocated = 4 };
SkAutoSTMalloc<kMinGeometryAllocated, Geometry> fGeoData;
int fGeoCount;
enum MaskType {
kGrayscaleCoverageMask_MaskType,
kLCDCoverageMask_MaskType,
kColorBitmapMask_MaskType,
kGrayscaleDistanceField_MaskType,
kLCDDistanceField_MaskType,
} fMaskType;
bool fUseBGR; // fold this into the enum?
GrBatchFontCache* fFontCache;
// Distance field properties
SkAutoTUnref<const DistanceAdjustTable> fDistanceAdjustTable;
SkColor fFilteredColor;
typedef GrVertexBatch INHERITED;
};
#endif