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gfx/ots/src/maxp.cc@6474c204b198 (annotated)

gfx/ots/src/maxp.cc

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	// Copyright (c) 2009 The Chromium Authors. All rights reserved.
michael@0	2	// Use of this source code is governed by a BSD-style license that can be
michael@0	3	// found in the LICENSE file.
michael@0	4
michael@0	5	#include "maxp.h"
michael@0	6
michael@0	7	// maxp - Maximum Profile
michael@0	8	// http://www.microsoft.com/typography/otspec/maxp.htm
michael@0	9
michael@0	10	#define TABLE_NAME "maxp"
michael@0	11
michael@0	12	namespace ots {
michael@0	13
michael@0	14	bool ots_maxp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) {
michael@0	15	Buffer table(data, length);
michael@0	16
michael@0	17	OpenTypeMAXP *maxp = new OpenTypeMAXP;
michael@0	18	file->maxp = maxp;
michael@0	19
michael@0	20	uint32_t version = 0;
michael@0	21	if (!table.ReadU32(&version)) {
michael@0	22	return OTS_FAILURE_MSG("Failed to read version of maxp table");
michael@0	23	}
michael@0	24
michael@0	25	if (version >> 16 > 1) {
michael@0	26	return OTS_FAILURE_MSG("Bad maxp version %d", version);
michael@0	27	}
michael@0	28
michael@0	29	if (!table.ReadU16(&maxp->num_glyphs)) {
michael@0	30	return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table");
michael@0	31	}
michael@0	32
michael@0	33	if (!maxp->num_glyphs) {
michael@0	34	return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table");
michael@0	35	}
michael@0	36
michael@0	37	if (version >> 16 == 1) {
michael@0	38	maxp->version_1 = true;
michael@0	39	if (!table.ReadU16(&maxp->max_points) ||
michael@0	40	!table.ReadU16(&maxp->max_contours) ||
michael@0	41	!table.ReadU16(&maxp->max_c_points) ||
michael@0	42	!table.ReadU16(&maxp->max_c_contours) ||
michael@0	43	!table.ReadU16(&maxp->max_zones) ||
michael@0	44	!table.ReadU16(&maxp->max_t_points) ||
michael@0	45	!table.ReadU16(&maxp->max_storage) ||
michael@0	46	!table.ReadU16(&maxp->max_fdefs) ||
michael@0	47	!table.ReadU16(&maxp->max_idefs) ||
michael@0	48	!table.ReadU16(&maxp->max_stack) ||
michael@0	49	!table.ReadU16(&maxp->max_size_glyf_instructions) ||
michael@0	50	!table.ReadU16(&maxp->max_c_components) ||
michael@0	51	!table.ReadU16(&maxp->max_c_depth)) {
michael@0	52	return OTS_FAILURE_MSG("Failed to read maxp table");
michael@0	53	}
michael@0	54
michael@0	55	if (maxp->max_zones == 0) {
michael@0	56	// workaround for ipa*.ttf Japanese fonts.
michael@0	57	OTS_WARNING("bad max_zones: %u", maxp->max_zones);
michael@0	58	maxp->max_zones = 1;
michael@0	59	} else if (maxp->max_zones == 3) {
michael@0	60	// workaround for Ecolier-*.ttf fonts.
michael@0	61	OTS_WARNING("bad max_zones: %u", maxp->max_zones);
michael@0	62	maxp->max_zones = 2;
michael@0	63	}
michael@0	64
michael@0	65	if ((maxp->max_zones != 1) && (maxp->max_zones != 2)) {
michael@0	66	return OTS_FAILURE_MSG("Bad max zones %d in maxp", maxp->max_zones);
michael@0	67	}
michael@0	68	} else {
michael@0	69	maxp->version_1 = false;
michael@0	70	}
michael@0	71
michael@0	72	return true;
michael@0	73	}
michael@0	74
michael@0	75	bool ots_maxp_should_serialise(OpenTypeFile *file) {
michael@0	76	return file->maxp != NULL;
michael@0	77	}
michael@0	78
michael@0	79	bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) {
michael@0	80	const OpenTypeMAXP *maxp = file->maxp;
michael@0	81
michael@0	82	if (!out->WriteU32(maxp->version_1 ? 0x00010000 : 0x00005000) ||
michael@0	83	!out->WriteU16(maxp->num_glyphs)) {
michael@0	84	return OTS_FAILURE_MSG("Failed to write maxp version or number of glyphs");
michael@0	85	}
michael@0	86
michael@0	87	if (!maxp->version_1) return true;
michael@0	88
michael@0	89	if (!out->WriteU16(maxp->max_points) ||
michael@0	90	!out->WriteU16(maxp->max_contours) ||
michael@0	91	!out->WriteU16(maxp->max_c_points) ||
michael@0	92	!out->WriteU16(maxp->max_c_contours)) {
michael@0	93	return OTS_FAILURE_MSG("Failed to write maxp");
michael@0	94	}
michael@0	95
michael@0	96	if (g_transcode_hints) {
michael@0	97	if (!out->WriteU16(maxp->max_zones) ||
michael@0	98	!out->WriteU16(maxp->max_t_points) ||
michael@0	99	!out->WriteU16(maxp->max_storage) ||
michael@0	100	!out->WriteU16(maxp->max_fdefs) ||
michael@0	101	!out->WriteU16(maxp->max_idefs) ||
michael@0	102	!out->WriteU16(maxp->max_stack) ||
michael@0	103	!out->WriteU16(maxp->max_size_glyf_instructions)) {
michael@0	104	return OTS_FAILURE_MSG("Failed to write more maxp");
michael@0	105	}
michael@0	106	} else {
michael@0	107	if (!out->WriteU16(1) || // max zones
michael@0	108	!out->WriteU16(0) || // max twilight points
michael@0	109	!out->WriteU16(0) || // max storage
michael@0	110	!out->WriteU16(0) || // max function defs
michael@0	111	!out->WriteU16(0) || // max instruction defs
michael@0	112	!out->WriteU16(0) || // max stack elements
michael@0	113	!out->WriteU16(0)) { // max instruction byte count
michael@0	114	return OTS_FAILURE_MSG("Failed to write more maxp");
michael@0	115	}
michael@0	116	}
michael@0	117
michael@0	118	if (!out->WriteU16(maxp->max_c_components) ||
michael@0	119	!out->WriteU16(maxp->max_c_depth)) {
michael@0	120	return OTS_FAILURE_MSG("Failed to write yet more maxp");
michael@0	121	}
michael@0	122
michael@0	123	return true;
michael@0	124	}
michael@0	125
michael@0	126	void ots_maxp_free(OpenTypeFile *file) {
michael@0	127	delete file->maxp;
michael@0	128	}
michael@0	129
michael@0	130	} // namespace ots