DEF_TEST(color_half_float, reporter) {
const int w = 100;
const int h = 100;
SkImageInfo info = SkImageInfo::Make(w, h, kRGBA_F16_SkColorType, kPremul_SkAlphaType);
SkAutoPixmapStorage pm;
pm.alloc(info);
REPORTER_ASSERT(reporter, pm.getSafeSize() == SkToSizeT(w * h * sizeof(uint64_t)));
SkColor4f c4 { 1, 0.5f, 0.25f, 0.5f };
pm.erase(c4);
SkPM4f origpm4 = c4.premul();
for (int y = 0; y < pm.height(); ++y) {
for (int x = 0; x < pm.width(); ++x) {
SkPM4f pm4 = SkPM4f::FromF16(pm.addrF16(x, y));
REPORTER_ASSERT(reporter, eq_within_half_float(origpm4, pm4));
}
}
}
bool addPathToAtlas(GrVertexBatch::Target* target,
FlushInfo* flushInfo,
GrBatchAtlas* atlas,
ShapeData* shapeData,
const GrShape& shape,
bool antiAlias,
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;
// move the origin to an integer boundary (gives better results)
SkScalar dx = SkScalarFraction(scaledBounds.fLeft);
SkScalar dy = SkScalarFraction(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);
// pre-move origin (after outset, will be 0,0)
int width = devPathBounds.width();
int height = devPathBounds.height();
devPathBounds.fLeft = intPad;
devPathBounds.fTop = intPad;
devPathBounds.fRight = intPad + width;
devPathBounds.fBottom = intPad + height;
devPathBounds.outset(intPad, intPad);
// draw path to bitmap
SkMatrix drawMatrix;
drawMatrix.setTranslate(-bounds.left(), -bounds.top());
drawMatrix.postScale(scale, scale);
drawMatrix.postTranslate(kAntiAliasPad, kAntiAliasPad);
// setup bitmap backing
SkASSERT(devPathBounds.fLeft == 0);
SkASSERT(devPathBounds.fTop == 0);
SkAutoPixmapStorage dst;
if (!dst.tryAlloc(SkImageInfo::MakeA8(devPathBounds.width(),
devPathBounds.height()))) {
return false;
}
sk_bzero(dst.writable_addr(), dst.getSafeSize());
// rasterize path
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(antiAlias);
SkDraw draw;
sk_bzero(&draw, sizeof(draw));
SkRasterClip rasterClip;
rasterClip.setRect(devPathBounds);
draw.fRC = &rasterClip;
draw.fMatrix = &drawMatrix;
draw.fDst = dst;
SkPath path;
shape.asPath(&path);
draw.drawPathCoverage(path, paint);
// generate signed distance field
devPathBounds.outset(SK_DistanceFieldPad, SK_DistanceFieldPad);
width = devPathBounds.width();
height = devPathBounds.height();
// TODO We should really generate this directly into the plot somehow
SkAutoSMalloc<1024> dfStorage(width * height * sizeof(unsigned char));
// Generate signed distance field
SkGenerateDistanceFieldFromA8Image((unsigned char*)dfStorage.get(),
(const unsigned char*)dst.addr(),
dst.width(), dst.height(), dst.rowBytes());
// add to atlas
SkIPoint16 atlasLocation;
GrBatchAtlas::AtlasID id;
if (!atlas->addToAtlas(&id, target, width, height, dfStorage.get(), &atlasLocation)) {
this->flush(target, flushInfo);
if (!atlas->addToAtlas(&id, target, width, height, dfStorage.get(), &atlasLocation)) {
return false;
}
}
// add to cache
shapeData->fKey.set(shape, dimension);
shapeData->fScale = scale;
shapeData->fID = id;
// change the scaled rect to match the size of the inset distance field
scaledBounds.fRight = scaledBounds.fLeft +
SkIntToScalar(devPathBounds.width() - 2*SK_DistanceFieldInset);
scaledBounds.fBottom = scaledBounds.fTop +
SkIntToScalar(devPathBounds.height() - 2*SK_DistanceFieldInset);
// shift the origin to the correct place relative to the distance field
// need to also restore the fractional translation
scaledBounds.offset(-SkIntToScalar(SK_DistanceFieldInset) - kAntiAliasPad + dx,
-SkIntToScalar(SK_DistanceFieldInset) - kAntiAliasPad + dy);
shapeData->fBounds = scaledBounds;
// origin we render from is inset from distance field edge
atlasLocation.fX += SK_DistanceFieldInset;
atlasLocation.fY += SK_DistanceFieldInset;
shapeData->fAtlasLocation = atlasLocation;
fShapeCache->add(shapeData);
fShapeList->addToTail(shapeData);
#ifdef DF_PATH_TRACKING
++g_NumCachedPaths;
#endif
return true;
}