static bool get_packed_glyph_image(SkGlyphCache* cache, const SkGlyph& glyph, int width,
int height, int dstRB, GrMaskFormat expectedMaskFormat,
void* dst) {
SkASSERT(glyph.fWidth == width);
SkASSERT(glyph.fHeight == height);
const void* src = cache->findImage(glyph);
if (nullptr == src) {
return false;
}
// crbug:510931
// Retrieving the image from the cache can actually change the mask format. This case is very
// uncommon so for now we just draw a clear box for these glyphs.
if (get_packed_glyph_mask_format(glyph) != expectedMaskFormat) {
const int bpp = GrMaskFormatBytesPerPixel(expectedMaskFormat);
for (int y = 0; y < height; y++) {
sk_bzero(dst, width * bpp);
dst = (char*)dst + dstRB;
}
return true;
}
int srcRB = glyph.rowBytes();
// The windows font host sometimes has BW glyphs in a non-BW strike. So it is important here to
// check the glyph's format, not the strike's format, and to be able to convert to any of the
// GrMaskFormats.
if (SkMask::kBW_Format == glyph.fMaskFormat) {
// expand bits to our mask type
const uint8_t* bits = reinterpret_cast<const uint8_t*>(src);
switch (expectedMaskFormat) {
case kA8_GrMaskFormat:{
uint8_t* bytes = reinterpret_cast<uint8_t*>(dst);
expand_bits(bytes, bits, width, height, dstRB, srcRB);
break;
}
case kA565_GrMaskFormat: {
uint16_t* rgb565 = reinterpret_cast<uint16_t*>(dst);
expand_bits(rgb565, bits, width, height, dstRB, srcRB);
break;
}
default:
SkFAIL("Invalid GrMaskFormat");
}
} else if (srcRB == dstRB) {
memcpy(dst, src, dstRB * height);
} else {
const int bbp = GrMaskFormatBytesPerPixel(expectedMaskFormat);
for (int y = 0; y < height; y++) {
memcpy(dst, src, width * bbp);
src = (const char*)src + srcRB;
dst = (char*)dst + dstRB;
}
}
return true;
}
bool SkGrFontScaler::getPackedGlyphImage(GrGlyph::PackedID packed,
int width, int height,
int dstRB, void* dst) {
const SkGlyph& glyph = fStrike->getGlyphIDMetrics(GrGlyph::UnpackID(packed),
GrGlyph::UnpackFixedX(packed),
GrGlyph::UnpackFixedY(packed));
SkASSERT(glyph.fWidth == width);
SkASSERT(glyph.fHeight == height);
const void* src = fStrike->findImage(glyph);
if (NULL == src) {
return false;
}
int srcRB = glyph.rowBytes();
// The windows font host sometimes has BW glyphs in a non-BW strike. So it is important here to
// check the glyph's format, not the strike's format, and to be able to convert to any of the
// GrMaskFormats.
if (SkMask::kBW_Format == glyph.fMaskFormat) {
// expand bits to our mask type
const uint8_t* bits = reinterpret_cast<const uint8_t*>(src);
switch (this->getMaskFormat()) {
case kA8_GrMaskFormat: {
uint8_t* bytes = reinterpret_cast<uint8_t*>(dst);
expand_bits(bytes, bits, width, height, dstRB, srcRB);
break;
}
case kA565_GrMaskFormat: {
uint16_t* rgb565 = reinterpret_cast<uint16_t*>(dst);
expand_bits(rgb565, bits, width, height, dstRB, srcRB);
break;
}
case kA888_GrMaskFormat: {
uint32_t* rgba8888 = reinterpret_cast<uint32_t*>(dst);
expand_bits(rgba8888, bits, width, height, dstRB, srcRB);
break;
}
default:
GrCrash("Invalid GrMaskFormat");
}
} else if (srcRB == dstRB) {
memcpy(dst, src, dstRB * height);
} else {
const int bbp = GrMaskFormatBytesPerPixel(this->getMaskFormat());
for (int y = 0; y < height; y++) {
memcpy(dst, src, width * bbp);
src = (const char*)src + srcRB;
dst = (char*)dst + dstRB;
}
}
return true;
}
static int
get_section (
BITS *bits, /* Bitstring to work with */
int index, /* Index block number */
int section, /* Section within index */
byte *buffer, /* Returned buffer */
Bool update) /* If TRUE, frees section blocks */
{
BITBLOCK
*index_block, /* Points to index block */
*section_block; /* Points to section block */
dbyte
section_head, /* Section block list head */
block_nbr, /* Entry into block table */
block_next; /* Next block in section list */
static byte
comp [BIT_SECTSIZE + 1]; /* Section blocks' data */
word
comp_size, /* Size of compressed data */
expand_size; /* Size of expanded data */
ASSERT (bits);
ASSERT (buffer);
index_block = bits-> block [index];
section_head = index_block-> block.index [section];
if (section_head == 0x0000) /* All 0's */
memset (buffer, 0x00, BIT_SECTSIZE);
else
if (section_head == 0xFFFF) /* All 1's */
memset (buffer, 0xFF, BIT_SECTSIZE);
else
{
block_nbr = section_head;
comp_size = 0; /* Get compressed block */
while (block_nbr) /* from 1 or more sections */
{
section_block = bits-> block [block_nbr];
ASSERT (comp_size < BIT_SECTSIZE);
memcpy (comp + comp_size, section_block-> block.data,
section_block-> size);
comp_size += section_block-> size;
block_next = section_block-> right;
if (update)
{ /* Move block to free list */
section_block-> right = bits-> free_list;
section_block-> size = 0;
bits-> free_list = block_nbr;
}
block_nbr = block_next;
}
if (update) /* Wipe section block list */
index_block-> block.index [section] = 0;
expand_size = expand_bits (comp, buffer, comp_size);
ASSERT (expand_size == BIT_SECTSIZE);
}
return 0;
}
local
expand_file_rle (FILE *input, FILE *output)
{
word
in_size,
out_size;
while ((fread (&in_size, 1, sizeof (in_size), input)) > 0)
{
ASSERT (fread (in_block, 1, in_size, input));
out_size = expand_bits (in_block, out_block, in_size);
ASSERT (fwrite (out_block, 1, out_size, output));
printf ("rle expand: in=%d out=%d\n", in_size, out_size);
}
}