[colr/cpal] Improvements and add a sample renderer (#927)

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Ebrahim Byagowi 2018-04-10 00:53:50 +04:30 committed by GitHub
parent f25731a360
commit a62554af89
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4 changed files with 259 additions and 48 deletions

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@ -362,15 +362,11 @@ dist_check_SCRIPTS += \
endif
check_PROGRAMS += \
dump-emoji \
dump-indic-data \
dump-khmer-data \
dump-myanmar-data \
dump-use-data \
$(NULL)
dump_emoji_SOURCES = dump-emoji.cc
dump_emoji_CPPFLAGS = $(HBCFLAGS)
dump_emoji_LDADD = libharfbuzz.la $(HBLIBS)
dump_indic_data_SOURCES = dump-indic-data.cc hb-ot-shape-complex-indic-table.cc
dump_indic_data_CPPFLAGS = $(HBCFLAGS)
dump_indic_data_LDADD = libharfbuzz.la $(HBLIBS)
@ -384,6 +380,15 @@ dump_use_data_SOURCES = dump-use-data.cc hb-ot-shape-complex-use-table.cc
dump_use_data_CPPFLAGS = $(HBCFLAGS)
dump_use_data_LDADD = libharfbuzz.la $(HBLIBS)
if HAVE_FREETYPE
if HAVE_CAIRO_FT
check_PROGRAMS += dump-emoji
dump_emoji_SOURCES = dump-emoji.cc
dump_emoji_CPPFLAGS = $(HBCFLAGS) $(FREETYPE_CFLAGS) $(CAIRO_FT_CFLAGS)
dump_emoji_LDADD = libharfbuzz.la $(HBLIBS) $(FREETYPE_LIBS) $(CAIRO_LIBS) $(CAIRO_FT_LIBS)
endif # HAVE_CAIRO_FT
endif # HAVE_FREETYPE
check_PROGRAMS += test-ot-tag test-unicode-ranges
TESTS += test-ot-tag test-unicode-ranges

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@ -25,9 +25,21 @@
#include "hb.h"
#include "hb-private.hh"
#include "hb-ot-color-cbdt-table.hh"
#include "hb-ot-color-colr-table.hh"
#include "hb-ot-color-cpal-table.hh"
#include "hb-ot-color-sbix-table.hh"
#include "hb-ot-color-svg-table.hh"
#include "hb-ft.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include <cairo.h>
#include <cairo-ft.h>
#include <cairo-svg.h>
#ifdef HAVE_GLIB
#include <glib.h>
#endif
@ -41,9 +53,9 @@ const void * const OT::_hb_NullPool[HB_NULL_POOL_SIZE / sizeof (void *)] = {};
void cbdt_callback (const uint8_t* data, unsigned int length,
unsigned int group, unsigned int gid)
{
char outName[255];
sprintf (outName, "out/cbdt-%d-%d.png", group, gid);
FILE *f = fopen (outName, "wb");
char output_path[255];
sprintf (output_path, "out/cbdt-%d-%d.png", group, gid);
FILE *f = fopen (output_path, "wb");
fwrite (data, 1, length, f);
fclose (f);
}
@ -51,9 +63,9 @@ void cbdt_callback (const uint8_t* data, unsigned int length,
void sbix_callback (const uint8_t* data, unsigned int length,
unsigned int group, unsigned int gid)
{
char outName[255];
sprintf (outName, "out/sbix-%d-%d.png", group, gid);
FILE *f = fopen (outName, "wb");
char output_path[255];
sprintf (output_path, "out/sbix-%d-%d.png", group, gid);
FILE *f = fopen (output_path, "wb");
fwrite (data, 1, length, f);
fclose (f);
}
@ -61,22 +73,145 @@ void sbix_callback (const uint8_t* data, unsigned int length,
void svg_callback (const uint8_t* data, unsigned int length,
unsigned int start_glyph, unsigned int end_glyph)
{
char outName[255];
char output_path[255];
if (start_glyph == end_glyph)
sprintf (outName, "out/svg-%d.svg", start_glyph);
sprintf (output_path, "out/svg-%d.svg", start_glyph);
else
sprintf (outName, "out/svg-%d-%d.svg", start_glyph, end_glyph);
sprintf (output_path, "out/svg-%d-%d.svg", start_glyph, end_glyph);
// append "z" if the content is gzipped
if ((data[0] == 0x1F) && (data[1] == 0x8B))
strcat (outName, "z");
strcat (output_path, "z");
FILE *f = fopen (outName, "wb");
FILE *f = fopen (output_path, "wb");
fwrite (data, 1, length, f);
fclose (f);
}
int main(int argc, char **argv)
void colr_cpal_rendering (cairo_font_face_t *cairo_face, unsigned int upem, unsigned int num_glyphs,
const OT::COLR *colr, const OT::CPAL *cpal)
{
for (int i = 0; i < num_glyphs; ++i)
{
unsigned int first_layer_index, num_layers;
if (colr->get_base_glyph_record (i, &first_layer_index, &num_layers))
{
// Measure
cairo_text_extents_t extents;
{
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
cairo_t *cr = cairo_create (surface);
cairo_set_font_face (cr, cairo_face);
cairo_set_font_size (cr, upem);
cairo_glyph_t *glyphs = (cairo_glyph_t *) calloc (num_layers, sizeof (cairo_glyph_t));
for (unsigned int j = 0; j < num_layers; ++j)
{
hb_codepoint_t glyph_id;
unsigned int color_index;
colr->get_layer_record (first_layer_index + j, &glyph_id, &color_index);
glyphs[j].index = glyph_id;
}
cairo_glyph_extents (cr, glyphs, num_layers, &extents);
free (glyphs);
cairo_surface_destroy (surface);
cairo_destroy (cr);
}
// Add a slight margin
extents.width += extents.width / 10;
extents.height += extents.height / 10;
extents.x_bearing -= extents.width / 20;
extents.y_bearing -= extents.height / 20;
// Render
unsigned int pallet_count = cpal->get_palette_count ();
for (unsigned int pallet = 0; pallet < pallet_count; ++pallet) {
char output_path[255];
// If we have more than one pallet, use a better namin
if (pallet_count == 1)
sprintf (output_path, "out/colr-%d.svg", i);
else
sprintf (output_path, "out/colr-%d-%d.svg", i, pallet);
cairo_surface_t *surface = cairo_svg_surface_create (output_path, extents.width, extents.height);
cairo_t *cr = cairo_create (surface);
cairo_set_font_face (cr, cairo_face);
cairo_set_font_size (cr, upem);
for (unsigned int j = 0; j < num_layers; ++j)
{
hb_codepoint_t glyph_id;
unsigned int color_index;
colr->get_layer_record (first_layer_index + j, &glyph_id, &color_index);
uint32_t color = cpal->get_color_record_argb (color_index, pallet);
int alpha = color & 0xFF;
int r = (color >> 8) & 0xFF;
int g = (color >> 16) & 0xFF;
int b = (color >> 24) & 0xFF;
cairo_set_source_rgba (cr, r / 255.f, g / 255.f, b / 255.f, alpha);
cairo_glyph_t glyph;
glyph.index = glyph_id;
glyph.x = -extents.x_bearing;
glyph.y = -extents.y_bearing;
cairo_show_glyphs (cr, &glyph, 1);
}
cairo_surface_destroy (surface);
cairo_destroy (cr);
}
}
}
}
void dump_glyphs (cairo_font_face_t *cairo_face, unsigned int upem, unsigned int num_glyphs)
{
// Dump every glyph available on the font
for (int i = 0; i < num_glyphs; ++i)
{
cairo_text_extents_t extents;
cairo_glyph_t glyph = {0};
glyph.index = i;
// Measure
{
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
cairo_t *cr = cairo_create (surface);
cairo_set_font_face (cr, cairo_face);
cairo_set_font_size (cr, upem);
cairo_glyph_extents (cr, &glyph, 1, &extents);
cairo_surface_destroy (surface);
cairo_destroy (cr);
}
// Add a slight margin
extents.width += extents.width / 10;
extents.height += extents.height / 10;
extents.x_bearing -= extents.width / 20;
extents.y_bearing -= extents.height / 20;
// Render
{
char output_path[255];
sprintf (output_path, "out/%d.svg", i);
cairo_surface_t *surface = cairo_svg_surface_create (output_path, extents.width, extents.height);
cairo_t *cr = cairo_create (surface);
cairo_set_font_face (cr, cairo_face);
cairo_set_font_size (cr, upem);
glyph.x = -extents.x_bearing;
glyph.y = -extents.y_bearing;
cairo_show_glyphs (cr, &glyph, 1);
cairo_surface_destroy (surface);
cairo_destroy (cr);
}
}
}
int main (int argc, char **argv)
{
if (argc != 2) {
fprintf (stderr, "usage: %s font-file.ttf\n", argv[0]);
@ -133,6 +268,28 @@ int main(int argc, char **argv)
svg.dump (svg_callback);
svg.fini ();
OT::Sanitizer<OT::COLR> sanitizerCOLR;
hb_blob_t* colr_blob = sanitizerCOLR.sanitize (face->reference_table (HB_OT_TAG_COLR));
const OT::COLR *colr = OT::Sanitizer<OT::COLR>::lock_instance (colr_blob);
OT::Sanitizer<OT::CPAL> sanitizerCPAL;
hb_blob_t* cpal_blob = sanitizerCPAL.sanitize (face->reference_table (HB_OT_TAG_CPAL));
const OT::CPAL *cpal = OT::Sanitizer<OT::CPAL>::lock_instance (cpal_blob);
cairo_font_face_t *cairo_face;
{
FT_Library library;
FT_Init_FreeType (&library);
FT_Face ftface;
FT_New_Face (library, argv[1], 0, &ftface);
cairo_face = cairo_ft_font_face_create_for_ft_face (ftface, 0);
}
unsigned int num_glyphs = hb_face_get_glyph_count (face);
unsigned int upem = hb_face_get_upem (face);
colr_cpal_rendering (cairo_face, upem, num_glyphs, colr, cpal);
dump_glyphs (cairo_face, upem, num_glyphs);
hb_font_destroy (font);
hb_face_destroy (face);
hb_blob_destroy (blob);

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@ -64,6 +64,10 @@ struct BaseGlyphRecord
return_trace (c->check_struct (this));
}
inline int cmp (hb_codepoint_t g) const {
return g < glyphid ? -1 : g > glyphid ? 1 : 0;
}
protected:
GlyphID glyphid; /* Glyph ID of reference glyph */
HBUINT16 firstLayerIdx; /* Index to the layer record */
@ -72,6 +76,13 @@ struct BaseGlyphRecord
DEFINE_SIZE_STATIC (6);
};
static int compare_bgr (const void *pa, const void *pb)
{
const hb_codepoint_t *a = (const hb_codepoint_t *) pa;
const BaseGlyphRecord *b = (const BaseGlyphRecord *) pb;
return b->cmp (*a);
}
struct COLR
{
static const hb_tag_t tableTag = HB_OT_TAG_COLR;
@ -80,17 +91,41 @@ struct COLR
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
(this+baseGlyphs).sanitize (c, numBaseGlyphs) &&
(this+layers).sanitize (c, numLayers));
(this+baseGlyphsZ).sanitize (c, numBaseGlyphs) &&
(this+layersZ).sanitize (c, numLayers));
}
inline bool get_base_glyph_record (hb_codepoint_t glyph_id,
unsigned int *first_layer /* OUT */,
unsigned int *num_layers /* OUT */) const
{
const BaseGlyphRecord* record;
record = (BaseGlyphRecord *) bsearch (&glyph_id, &(this+baseGlyphsZ), numBaseGlyphs,
sizeof (BaseGlyphRecord), compare_bgr);
if (!record)
return false;
*first_layer = record->firstLayerIdx;
*num_layers = record->numLayers;
return true;
}
inline void get_layer_record (unsigned int record,
hb_codepoint_t *glyph_id /* OUT */,
unsigned int *palette_index /* OUT */) const
{
const LayerRecord &layer = (this+layersZ)[record];
*glyph_id = layer.glyphid;
*palette_index = layer.colorIdx;
}
protected:
HBUINT16 version; /* Table version number */
HBUINT16 numBaseGlyphs; /* Number of Base Glyph Records */
LOffsetTo<UnsizedArrayOf<BaseGlyphRecord> >
baseGlyphs; /* Offset to Base Glyph records. */
baseGlyphsZ; /* Offset to Base Glyph records. */
LOffsetTo<UnsizedArrayOf<LayerRecord> >
layers; /* Offset to Layer Records */
layersZ; /* Offset to Layer Records */
HBUINT16 numLayers; /* Number of Layer Records */
public:
DEFINE_SIZE_STATIC (14);

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@ -92,35 +92,44 @@ struct CPALV1Tail
{
friend struct CPAL;
inline bool sanitize (hb_sanitize_context_t *c, unsigned int palettes) const
inline bool
sanitize (hb_sanitize_context_t *c, const void *base, unsigned int palettes) const
{
TRACE_SANITIZE (this);
return_trace (
c->check_struct (this) &&
c->check_array ((const void*) &paletteFlags, sizeof (HBUINT32), palettes) &&
c->check_array ((const void*) &paletteLabel, sizeof (HBUINT16), palettes) &&
c->check_array ((const void*) &paletteEntryLabel, sizeof (HBUINT16), palettes));
return_trace (c->check_struct (this) &&
(base+paletteFlagsZ).sanitize (c, palettes) &&
(base+paletteLabelZ).sanitize (c, palettes) &&
(base+paletteEntryLabelZ).sanitize (c, palettes));
}
private:
inline hb_ot_color_palette_flags_t
get_palette_flags (const void *base, unsigned int palette) const
{
const HBUINT32* flags = &paletteFlags (base);
return (hb_ot_color_palette_flags_t) (uint32_t) flags[palette];
// range checked at the CPAL caller
return (hb_ot_color_palette_flags_t) (uint32_t) (base+paletteFlagsZ)[palette];
}
inline unsigned int
get_palette_name_id (const void *base, unsigned int palette) const
{
const HBUINT16* name_ids = &paletteLabel (base);
return name_ids[palette];
// range checked at the CPAL caller
return (base+paletteLabelZ)[palette];
}
protected:
LOffsetTo<HBUINT32> paletteFlags;
LOffsetTo<HBUINT16> paletteLabel;
LOffsetTo<HBUINT16> paletteEntryLabel;
LOffsetTo<UnsizedArrayOf<HBUINT32> >
paletteFlagsZ; /* Offset from the beginning of CPAL table to
* the Palette Type Array. Set to 0 if no array
* is provided. */
LOffsetTo<UnsizedArrayOf<HBUINT16> >
paletteLabelZ; /* Offset from the beginning of CPAL table to
* the Palette Labels Array. Set to 0 if no
* array is provided. */
LOffsetTo<UnsizedArrayOf<HBUINT16> >
paletteEntryLabelZ; /* Offset from the beginning of CPAL table to
* the Palette Entry Label Array. Set to 0
* if no array is provided. */
public:
DEFINE_SIZE_STATIC (12);
};
@ -134,13 +143,13 @@ struct CPAL
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (!(c->check_struct (this) && // This checks colorRecordIndicesX sanity also, see #get_size
c->check_array ((const void*) &colorRecordsZ, sizeof (BGRAColor), numColorRecords)))
if (!(c->check_struct (this) && // it checks colorRecordIndices also, see #get_size
(this+colorRecordsZ).sanitize (c, numColorRecords)))
return_trace (false);
// Check for indices sanity so no need for doing it runtime
for (unsigned int i = 0; i < numPalettes; ++i)
if (colorRecordIndicesX[i] + numPaletteEntries > numColorRecords)
if (colorRecordIndicesZ[i] + numPaletteEntries > numColorRecords)
return_trace (false);
// If version is zero, we are done here; otherwise we need to check tail also
@ -148,7 +157,7 @@ struct CPAL
return_trace (true);
const CPALV1Tail &v1 = StructAfter<CPALV1Tail> (*this);
return_trace (v1.sanitize (c, numPalettes));
return_trace (v1.sanitize (c, this, numPalettes));
}
inline unsigned int get_size (void) const
@ -179,27 +188,32 @@ struct CPAL
return numPalettes;
}
inline hb_ot_color_t get_color_record_argb (unsigned int color_index, unsigned int palette) const
inline hb_ot_color_t
get_color_record_argb (unsigned int color_index, unsigned int palette) const
{
if (color_index >= numPaletteEntries || palette >= numPalettes)
return 0;
const BGRAColor* records = &colorRecordsZ(this);
// No need for more range check as it is already done on #sanitize
return records[colorRecordIndicesX[palette] + color_index];
return (this+colorRecordsZ)[colorRecordIndicesZ[palette] + color_index];
}
protected:
HBUINT16 version;
HBUINT16 version; /* Table version number */
/* Version 0 */
HBUINT16 numPaletteEntries;
HBUINT16 numPalettes;
HBUINT16 numColorRecords;
LOffsetTo<HBUINT32> colorRecordsZ;
HBUINT16 colorRecordIndicesX[VAR]; // VAR=numPalettes
/*CPALV1Tail v1[VAR];*/
HBUINT16 numPaletteEntries; /* Number of palette entries in each palette. */
HBUINT16 numPalettes; /* Number of palettes in the table. */
HBUINT16 numColorRecords; /* Total number of color records, combined for
* all palettes. */
LOffsetTo<UnsizedArrayOf<BGRAColor> >
colorRecordsZ; /* Offset from the beginning of CPAL table to
* the first ColorRecord. */
UnsizedArrayOf<HBUINT16>
colorRecordIndicesZ; /* Index of each palettes first color record in
* the combined color record array. */
/*CPALV1Tail v1;*/
public:
DEFINE_SIZE_ARRAY (12, colorRecordIndicesX);
DEFINE_SIZE_ARRAY (12, colorRecordIndicesZ);
};
} /* namespace OT */