summaryrefslogtreecommitdiff
path: root/image/webp.c
blob: 439bdfc9bc9bbd893d506e614056778c076fc531 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
 /*
 * Copyright 2010 Chris Young <chris@unsatisfactorysoftware.co.uk>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/** \file
 * Content for image/webp (libwebp implementation).
 *
 */

#include "utils/config.h"
#ifdef WITH_WEBP

#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <webp/decode.h>
#include "desktop/plotters.h"
#include "image/bitmap.h"
#include "content/content_protected.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"

/**
 * Convert a CONTENT_WEBP for display.
 *
 * No conversion is necessary. We merely read the WebP dimensions.
 */

bool webp_convert(struct content *c)
{
	union content_msg_data msg_data;
	const uint8_t *data;
	unsigned char *imagebuf = NULL;
	unsigned long size;
	int width = 0, height = 0;
	char title[100];
	int res = 0;
	uint8_t *res_p = NULL;

	data = (uint8_t *)content__get_source_data(c, &size);

	res = WebPGetInfo(data, size, &width, &height);
	if (res == 0) {
		msg_data.error = messages_get("NoMemory");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	}

	c->bitmap = bitmap_create(width, height, BITMAP_NEW | BITMAP_OPAQUE);
	if (!c->bitmap) {
		msg_data.error = messages_get("NoMemory");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	}

	imagebuf = bitmap_get_buffer(c->bitmap);
	if (!imagebuf) {
		msg_data.error = messages_get("NoMemory");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	}
	unsigned int row_width = bitmap_get_rowstride(c->bitmap);

	res_p = WebPDecodeRGBAInto(data, size, imagebuf,
				row_width * height, row_width);
	if (res_p == NULL) {
		msg_data.error = messages_get("NoMemory");
		content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
		return false;
	}

	c->width = width;
	c->height = height;
	snprintf(title, sizeof(title), messages_get("WebPTitle"),
		width, height, size);
	content__set_title(c, title);

	bitmap_modified(c->bitmap);

	content_set_ready(c);
	content_set_done(c);

	content_set_status(c, "");
	return true;
}


/**
 * Destroy a CONTENT_WEBP and free all resources it owns.
 */

void webp_destroy(struct content *c)
{
	if (c->bitmap != NULL)
		bitmap_destroy(c->bitmap);
}


/**
 * Redraw a CONTENT_WEBP.
 */

bool webp_redraw(struct content *c, int x, int y,
		int width, int height, const struct rect *clip,
		float scale, colour background_colour)
{
	return plot.bitmap(x, y, width, height,
			c->bitmap, background_colour, BITMAPF_NONE);
}


bool webp_clone(const struct content *old, struct content *new_content)
{
	/* Simply replay convert */
	if (old->status == CONTENT_STATUS_READY ||
			old->status == CONTENT_STATUS_DONE) {
		if (webp_convert(new_content) == false)
			return false;
	}

	return true;
}

#endif