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authorAkira Kakuto <kakuto@fuk.kindai.ac.jp>2018-03-07 22:32:14 +0000
committerAkira Kakuto <kakuto@fuk.kindai.ac.jp>2018-03-07 22:32:14 +0000
commitef9282421b00185a4962b7d22b96e979687258e2 (patch)
treeb6d0d8c700086d3141e228187693a26b102c971f /Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-color-cpal-table.hh
parent55fbdeae2498166ec7c7301fd48d990fc9010058 (diff)
harfbuzz-1.7.6
git-svn-id: svn://tug.org/texlive/trunk@46877 c570f23f-e606-0410-a88d-b1316a301751
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+/*
+ * Copyright © 2016 Google, Inc.
+ * Copyright © 2018 Ebrahim Byagowi
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Sascha Brawer
+ */
+
+#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 */);
+
+
+
+
+
+/*
+ * Color Palette
+ * http://www.microsoft.com/typography/otspec/cpal.htm
+ */
+
+#define HB_OT_TAG_CPAL HB_TAG('C','P','A','L')
+
+namespace OT {
+
+
+struct CPALV1Tail
+{
+ friend struct CPAL;
+
+ inline bool sanitize (hb_sanitize_context_t *c, 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));
+ }
+
+ 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];
+ }
+
+ inline unsigned int
+ get_palette_name_id (const void *base, unsigned int palette) const
+ {
+ const HBUINT16* name_ids = &paletteLabel (base);
+ return name_ids[palette];
+ }
+
+ protected:
+ LOffsetTo<HBUINT32> paletteFlags;
+ LOffsetTo<HBUINT16> paletteLabel;
+ LOffsetTo<HBUINT16> paletteEntryLabel;
+ public:
+ DEFINE_SIZE_STATIC (12);
+};
+
+typedef HBUINT32 BGRAColor;
+
+struct CPAL
+{
+ static const hb_tag_t tableTag = HB_OT_TAG_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)))
+ 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)
+ 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 (v1.sanitize (c, numPalettes));
+ }
+
+ inline unsigned int get_size (void) const
+ {
+ return min_size + numPalettes * sizeof (HBUINT16);
+ }
+
+ inline hb_ot_color_palette_flags_t get_palette_flags (unsigned int palette) const
+ {
+ if (version == 0 || palette >= numPalettes)
+ return HB_OT_COLOR_PALETTE_FLAG_DEFAULT;
+
+ const CPALV1Tail& cpal1 = StructAfter<CPALV1Tail> (*this);
+ return cpal1.get_palette_flags (this, palette);
+ }
+
+ inline unsigned int get_palette_name_id (unsigned int palette) const
+ {
+ if (version == 0 || palette >= numPalettes)
+ return 0xFFFF;
+
+ const CPALV1Tail& cpal1 = StructAfter<CPALV1Tail> (*this);
+ return cpal1.get_palette_name_id (this, palette);
+ }
+
+ inline unsigned int get_palette_count () const
+ {
+ return numPalettes;
+ }
+
+ 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];
+ }
+
+ protected:
+ HBUINT16 version;
+ /* Version 0 */
+ HBUINT16 numPaletteEntries;
+ HBUINT16 numPalettes;
+ HBUINT16 numColorRecords;
+ LOffsetTo<HBUINT32> colorRecordsZ;
+ HBUINT16 colorRecordIndicesX[VAR]; // VAR=numPalettes
+/*CPALV1Tail v1[VAR];*/
+ public:
+ DEFINE_SIZE_ARRAY (12, colorRecordIndicesX);
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_COLOR_CPAL_TABLE_HH */