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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkGlyph.h"
void SkGlyph::initWithGlyphID(SkPackedGlyphID glyph_id) {
fID = glyph_id;
fImage = nullptr;
fPathData = nullptr;
fMaskFormat = MASK_FORMAT_UNKNOWN;
fForceBW = 0;
}
void SkGlyph::toMask(SkMask* mask) const {
SkASSERT(mask);
mask->fImage = (uint8_t*)fImage;
mask->fBounds.set(fLeft, fTop, fLeft + fWidth, fTop + fHeight);
mask->fRowBytes = this->rowBytes();
mask->fFormat = static_cast<SkMask::Format>(fMaskFormat);
}
void SkGlyph::zeroMetrics() {
fAdvanceX = 0;
fAdvanceY = 0;
fWidth = 0;
fHeight = 0;
fTop = 0;
fLeft = 0;
}
static size_t bits_to_bytes(size_t bits) {
return (bits + 7) >> 3;
}
static size_t format_alignment(SkMask::Format format) {
switch (format) {
case SkMask::kBW_Format:
case SkMask::kA8_Format:
case SkMask::k3D_Format:
case SkMask::kSDF_Format:
return alignof(uint8_t);
case SkMask::kARGB32_Format:
return alignof(uint32_t);
case SkMask::kLCD16_Format:
return alignof(uint16_t);
default:
SK_ABORT("Unknown mask format.");
break;
}
return 0;
}
static size_t format_rowbytes(int width, SkMask::Format format) {
return format == SkMask::kBW_Format ? bits_to_bytes(width)
: width * format_alignment(format);
}
size_t SkGlyph::allocImage(SkArenaAlloc* alloc) {
auto size = this->computeImageSize();
auto format = static_cast<SkMask::Format>(fMaskFormat);
fImage = alloc->makeBytesAlignedTo(size, format_alignment(format));
return size;
}
size_t SkGlyph::rowBytes() const {
return format_rowbytes(fWidth, (SkMask::Format)fMaskFormat);
}
size_t SkGlyph::rowBytesUsingFormat(SkMask::Format format) const {
return format_rowbytes(fWidth, format);
}
size_t SkGlyph::computeImageSize() const {
size_t size = this->rowBytes() * fHeight;
if (fMaskFormat == SkMask::k3D_Format) {
size *= 3;
}
return size;
}
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