#ifndef HB_OT_COLOR_CPAL_TABLE_HH
#define HB_OT_COLOR_CPAL_TABLE_HH
-#include "hb-open-type-private.hh"
-
-
-/*
- * Following parts to be moved to a public header.
- */
-
-/**
- * hb_ot_color_t:
- * ARGB data type for holding color values.
- *
- * Since: REPLACEME
- */
-typedef uint32_t hb_ot_color_t;
-
-
-/**
- * hb_ot_color_palette_flags_t:
- * @HB_OT_COLOR_PALETTE_FLAG_DEFAULT: default indicating that there is nothing special to note about a color palette.
- * @HB_OT_COLOR_PALETTE_FLAG_FOR_LIGHT_BACKGROUND: flag indicating that the color palette is suitable for rendering text on light background.
- * @HB_OT_COLOR_PALETTE_FLAG_FOR_DARK_BACKGROUND: flag indicating that the color palette is suitable for rendering text on dark background.
- *
- * Since: REPLACEME
- */
-typedef enum { /*< flags >*/
- HB_OT_COLOR_PALETTE_FLAG_DEFAULT = 0x00000000u,
- HB_OT_COLOR_PALETTE_FLAG_FOR_LIGHT_BACKGROUND = 0x00000001u,
- HB_OT_COLOR_PALETTE_FLAG_FOR_DARK_BACKGROUND = 0x00000002u,
-} hb_ot_color_palette_flags_t;
-
-// HB_EXTERN unsigned int
-// hb_ot_color_get_palette_count (hb_face_t *face);
-
-// HB_EXTERN unsigned int
-// hb_ot_color_get_palette_name_id (hb_face_t *face, unsigned int palette);
-
-// HB_EXTERN hb_ot_color_palette_flags_t
-// hb_ot_color_get_palette_flags (hb_face_t *face, unsigned int palette);
-
-// HB_EXTERN unsigned int
-// hb_ot_color_get_palette_colors (hb_face_t *face,
-// unsigned int palette, /* default=0 */
-// unsigned int start_offset,
-// unsigned int *color_count /* IN/OUT */,
-// hb_ot_color_t *colors /* OUT */);
-
-
-
+#include "hb-open-type.hh"
+#include "hb-ot-color.h"
+#include "hb-ot-name.h"
/*
{
friend struct CPAL;
- inline bool
- sanitize (hb_sanitize_context_t *c, const void *base, unsigned int palettes) const
+ private:
+ hb_ot_color_palette_flags_t get_palette_flags (const void *base,
+ unsigned int palette_index,
+ unsigned int palette_count) const
{
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this) &&
- (base+paletteFlagsZ).sanitize (c, palettes) &&
- (base+paletteLabelZ).sanitize (c, palettes) &&
- (base+paletteEntryLabelZ).sanitize (c, palettes));
+ if (!paletteFlagsZ) return HB_OT_COLOR_PALETTE_FLAG_DEFAULT;
+ return (hb_ot_color_palette_flags_t) (uint32_t)
+ (base+paletteFlagsZ).as_array (palette_count)[palette_index];
}
- private:
- inline hb_ot_color_palette_flags_t
- get_palette_flags (const void *base, unsigned int palette) const
+ hb_ot_name_id_t get_palette_name_id (const void *base,
+ unsigned int palette_index,
+ unsigned int palette_count) const
{
- // range checked at the CPAL caller
- return (hb_ot_color_palette_flags_t) (uint32_t) (base+paletteFlagsZ)[palette];
+ if (!paletteLabelsZ) return HB_OT_NAME_ID_INVALID;
+ return (base+paletteLabelsZ).as_array (palette_count)[palette_index];
}
- inline unsigned int
- get_palette_name_id (const void *base, unsigned int palette) const
+ hb_ot_name_id_t get_color_name_id (const void *base,
+ unsigned int color_index,
+ unsigned int color_count) const
{
- // range checked at the CPAL caller
- return (base+paletteLabelZ)[palette];
+ if (!colorLabelsZ) return HB_OT_NAME_ID_INVALID;
+ return (base+colorLabelsZ).as_array (color_count)[color_index];
+ }
+
+ public:
+ bool sanitize (hb_sanitize_context_t *c,
+ const void *base,
+ unsigned int palette_count,
+ unsigned int color_count) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ (!paletteFlagsZ || (base+paletteFlagsZ).sanitize (c, palette_count)) &&
+ (!paletteLabelsZ || (base+paletteLabelsZ).sanitize (c, palette_count)) &&
+ (!colorLabelsZ || (base+colorLabelsZ).sanitize (c, color_count)));
}
protected:
- LOffsetTo<UnsizedArrayOf<HBUINT32> >
+ LNNOffsetTo<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
+ LNNOffsetTo<UnsizedArrayOf<NameID> >
+ paletteLabelsZ; /* 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
+ LNNOffsetTo<UnsizedArrayOf<NameID> >
+ colorLabelsZ; /* Offset from the beginning of CPAL table to
+ * the color labels array. Set to 0
* if no array is provided. */
public:
DEFINE_SIZE_STATIC (12);
struct CPAL
{
- static const hb_tag_t tableTag = HB_OT_TAG_CPAL;
+ static constexpr hb_tag_t tableTag = HB_OT_TAG_CPAL;
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!(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 (unlikely (colorRecordIndicesZ[i] + numPaletteEntries > numColorRecords))
- return_trace (false);
-
- // If version is zero, we are done here; otherwise we need to check tail also
- if (version == 0)
- return_trace (true);
-
- const CPALV1Tail &v1 = StructAfter<CPALV1Tail> (*this);
- return_trace (likely (v1.sanitize (c, this, numPalettes)));
- }
+ bool has_data () const { return numPalettes; }
- inline unsigned int get_size (void) const
- {
- return min_size + numPalettes * sizeof (HBUINT16);
- }
+ unsigned int get_size () const
+ { return min_size + numPalettes * sizeof (colorRecordIndicesZ[0]); }
- inline hb_ot_color_palette_flags_t get_palette_flags (unsigned int palette) const
- {
- if (unlikely (version == 0 || palette >= numPalettes))
- return HB_OT_COLOR_PALETTE_FLAG_DEFAULT;
+ unsigned int get_palette_count () const { return numPalettes; }
+ unsigned int get_color_count () const { return numColors; }
- const CPALV1Tail& cpal1 = StructAfter<CPALV1Tail> (*this);
- return cpal1.get_palette_flags (this, palette);
- }
+ hb_ot_color_palette_flags_t get_palette_flags (unsigned int palette_index) const
+ { return v1 ().get_palette_flags (this, palette_index, numPalettes); }
- inline unsigned int get_palette_name_id (unsigned int palette) const
- {
- if (unlikely (version == 0 || palette >= numPalettes))
- return 0xFFFF;
+ hb_ot_name_id_t get_palette_name_id (unsigned int palette_index) const
+ { return v1 ().get_palette_name_id (this, palette_index, numPalettes); }
- const CPALV1Tail& cpal1 = StructAfter<CPALV1Tail> (*this);
- return cpal1.get_palette_name_id (this, palette);
- }
+ hb_ot_name_id_t get_color_name_id (unsigned int color_index) const
+ { return v1 ().get_color_name_id (this, color_index, numColors); }
- inline unsigned int get_palette_count () const
+ unsigned int get_palette_colors (unsigned int palette_index,
+ unsigned int start_offset,
+ unsigned int *color_count, /* IN/OUT. May be NULL. */
+ hb_color_t *colors /* OUT. May be NULL. */) const
{
- return numPalettes;
+ if (unlikely (palette_index >= numPalettes))
+ {
+ if (color_count) *color_count = 0;
+ return 0;
+ }
+ unsigned int start_index = colorRecordIndicesZ[palette_index];
+ hb_array_t<const BGRAColor> all_colors ((this+colorRecordsZ).arrayZ, numColorRecords);
+ hb_array_t<const BGRAColor> palette_colors = all_colors.sub_array (start_index,
+ numColors);
+ if (color_count)
+ {
+ hb_array_t<const BGRAColor> segment_colors = palette_colors.sub_array (start_offset, *color_count);
+ /* Always return numColors colors per palette even if it has out-of-bounds start index. */
+ unsigned int count = MIN<unsigned int> (MAX<int> (numColors - start_offset, 0), *color_count);
+ *color_count = count;
+ for (unsigned int i = 0; i < count; i++)
+ colors[i] = segment_colors[i]; /* Bound-checked read. */
+ }
+ return numColors;
}
- inline hb_ot_color_t
- get_color_record_argb (unsigned int color_index, unsigned int palette) const
+ private:
+ const CPALV1Tail& v1 () const
{
- if (unlikely (color_index >= numPaletteEntries || palette >= numPalettes))
- return 0;
+ if (version == 0) return Null(CPALV1Tail);
+ return StructAfter<CPALV1Tail> (*this);
+ }
- // No need for more range check as it is already done on #sanitize
- const UnsizedArrayOf<BGRAColor>& color_records = this+colorRecordsZ;
- return color_records[colorRecordIndicesZ[palette] + color_index];
+ public:
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ (this+colorRecordsZ).sanitize (c, numColorRecords) &&
+ colorRecordIndicesZ.sanitize (c, numPalettes) &&
+ (version == 0 || v1 ().sanitize (c, this, numPalettes, numColors)));
}
protected:
HBUINT16 version; /* Table version number */
/* Version 0 */
- HBUINT16 numPaletteEntries; /* Number of palette entries in each palette. */
+ HBUINT16 numColors; /* Number of colors 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> >
+ LNNOffsetTo<UnsizedArrayOf<BGRAColor> >
colorRecordsZ; /* Offset from the beginning of CPAL table to
* the first ColorRecord. */
UnsizedArrayOf<HBUINT16>
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