summaryrefslogtreecommitdiff
path: root/amiga/bitmap.h
blob: 63969ecaa01fca6533f6356583c2829329ab03b3 (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
/*
 * Copyright 2008,2009 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/>.
 */

#ifndef AMIGA_BITMAP_H
#define AMIGA_BITMAP_H

#include <exec/types.h>
#include <proto/graphics.h>
#include <intuition/classusr.h>
#include <libraries/Picasso96.h>

#define AMI_BITMAP_FORMAT RGBFB_R8G8B8A8
#define AMI_BITMAP_FORCE_OVERWRITE 0xFF

struct gui_bitmap_table *amiga_bitmap_table;

struct bitmap {
	int width;
	int height;
	UBYTE *pixdata;
	bool opaque;
	struct BitMap *nativebm;
	int nativebmwidth;
	int nativebmheight;
	PLANEPTR native_mask;
	Object *dto;
	char *url;   /* temporary storage space */
	char *title; /* temporary storage space */
	ULONG *icondata; /* for appicons */
};

struct BitMap *ami_bitmap_get_native(struct bitmap *bitmap,
				int width, int height, struct BitMap *friendbm);
PLANEPTR ami_bitmap_get_mask(struct bitmap *bitmap, int width,
				int height, struct BitMap *n_bm);

Object *ami_datatype_object_from_bitmap(struct bitmap *bitmap);
struct bitmap *ami_bitmap_from_datatype(char *filename);

#ifndef __amigaos4__
void ami_bitmap_argb_to_rgba(struct bitmap *bm);
#endif

/**
 * Create a bitmap.
 *
 * \param  width   width of image in pixels
 * \param  height  width of image in pixels
 * \param  state   a flag word indicating the initial state
 * \return an opaque struct bitmap, or NULL on memory exhaustion
 */
void *amiga_bitmap_create(int width, int height, unsigned int state);

/**
 * Return a pointer to the pixel data in a bitmap.
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 * \return pointer to the pixel buffer
 *
 * The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end
 * of rows. The width of a row in bytes is given by bitmap_get_rowstride().
 */
unsigned char *amiga_bitmap_get_buffer(void *bitmap);

/**
 * Find the width of a pixel row in bytes.
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 * \return width of a pixel row in the bitmap
 */
size_t amiga_bitmap_get_rowstride(void *bitmap);

/**
 * Free a bitmap.
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 */
void amiga_bitmap_destroy(void *bitmap);

/**
 * Save a bitmap in the platform's native format.
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 * \param  path    pathname for file
 * \param flags flags controlling how the bitmap is saved.
 * \return true on success, false on error and error reported
 */
bool amiga_bitmap_save(void *bitmap, const char *path, unsigned flags);

/**
 * The bitmap image has changed, so flush any persistant cache.
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 */
void amiga_bitmap_modified(void *bitmap);

/**
 * Sets whether a bitmap should be plotted opaque
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 * \param  opaque  whether the bitmap should be plotted opaque
 */
void amiga_bitmap_set_opaque(void *bitmap, bool opaque);

/**
 * Tests whether a bitmap has an opaque alpha channel
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 * \return whether the bitmap is opaque
 */
bool amiga_bitmap_test_opaque(void *bitmap);

/**
 * Gets whether a bitmap should be plotted opaque
 *
 * \param  bitmap  a bitmap, as returned by bitmap_create()
 */
bool amiga_bitmap_get_opaque(void *bitmap);


#endif