summaryrefslogtreecommitdiff
path: root/riscos/image.c
blob: 6ba57695b3b283474ff28113d2b0a0f33de787db (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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
/*
 * Copyright 2004 John M Bell <jmb202@ecs.soton.ac.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/>.
 */

#include <stdbool.h>
#include "swis.h"
#include "oslib/colourtrans.h"
#include "oslib/osspriteop.h"
#include "riscos/image.h"
#include "riscos/gui.h"
#include "riscos/options.h"
#include "riscos/tinct.h"
#include "utils/log.h"
#include "utils/utils.h"


static bool image_redraw_tinct(osspriteop_id header, int x, int y,
		int req_width, int req_height, int width, int height,
		colour background_colour, bool repeatx, bool repeaty,
		bool alpha, unsigned int tinct_options);
static bool image_redraw_os(osspriteop_id header, int x, int y,
		int req_width, int req_height, int width, int height);

/**
 * Plot an image at the given coordinates using the method specified
 *
 * \param area              The sprite area containing the sprite
 * \param x                 Left edge of sprite
 * \param y                 Top edge of sprite
 * \param req_width         The requested width of the sprite
 * \param req_height        The requested height of the sprite
 * \param width             The actual width of the sprite
 * \param height            The actual height of the sprite
 * \param background_colour The background colour to blend to
 * \param repeatx           Repeat the image in the x direction
 * \param repeaty           Repeat the image in the y direction
 * \param background	    Use background image settings (otherwise foreground)
 * \param type              The plot method to use
 * \return true on success, false otherwise
 */
bool image_redraw(osspriteop_area *area, int x, int y, int req_width,
		int req_height, int width, int height,
		colour background_colour,
		bool repeatx, bool repeaty, bool background, image_type type)
{
	unsigned int tinct_options;

	/* failed decompression/loading can result in no image being present */
	if (!area)
		return false;

	osspriteop_id header = (osspriteop_id)
			((char*) area + area->first);
	req_width *= 2;
	req_height *= 2;
	width *= 2;
	height *= 2;
	tinct_options = background ? option_bg_plot_style :
			option_fg_plot_style;
	switch (type) {
		case IMAGE_PLOT_TINCT_ALPHA:
			return image_redraw_tinct(header, x, y,
						req_width, req_height,
						width, height,
						background_colour,
						repeatx, repeaty, true,
						tinct_options);
		case IMAGE_PLOT_TINCT_OPAQUE:
			return image_redraw_tinct(header, x, y,
						req_width, req_height,
						width, height,
						background_colour,
						repeatx, repeaty, false,
						tinct_options);
		case IMAGE_PLOT_OS:
			return image_redraw_os(header, x, y, req_width,
						req_height, width, height);
		default:
			break;
	}

	return false;
}

/**
 * Plot an image at the given coordinates using tinct
 *
 * \param area              The sprite area containing the sprite
 * \param x                 Left edge of sprite
 * \param y                 Top edge of sprite
 * \param req_width         The requested width of the sprite
 * \param req_height        The requested height of the sprite
 * \param width             The actual width of the sprite
 * \param height            The actual height of the sprite
 * \param background_colour The background colour to blend to
 * \param repeatx           Repeat the image in the x direction
 * \param repeaty           Repeat the image in the y direction
 * \param alpha             Use the alpha channel
 * \param tinct_options	    The base option set to use
 * \return true on success, false otherwise
 */
bool image_redraw_tinct(osspriteop_id header, int x, int y,
		int req_width, int req_height, int width, int height,
		colour background_colour, bool repeatx, bool repeaty,
		bool alpha, unsigned int tinct_options)
{
	_kernel_oserror *error;

	/*	Set up our flagword
	*/
	tinct_options |= background_colour << tinct_BACKGROUND_SHIFT;
	if (print_active)
		tinct_options |= tinct_USE_OS_SPRITE_OP;
	if (repeatx)
		tinct_options |= tinct_FILL_HORIZONTALLY;
	if (repeaty)
		tinct_options |= tinct_FILL_VERTICALLY;

	if (alpha) {
		error = _swix(Tinct_PlotScaledAlpha, _INR(2,7),
				header, x, y - req_height,
				req_width, req_height, tinct_options);
	} else {
		error = _swix(Tinct_PlotScaled, _INR(2,7),
				header, x, y - req_height,
				req_width, req_height, tinct_options);
	}

	if (error) {
		LOG(("xtinct_plotscaled%s: 0x%x: %s", (alpha ? "alpha" : ""),
				error->errnum, error->errmess));
		return false;
	}

	return true;
}


/**
 * Plot an image at the given coordinates using os_spriteop
 *
 * \param area       The sprite area containing the sprite
 * \param x          Left edge of sprite
 * \param y          Top edge of sprite
 * \param req_width  The requested width of the sprite
 * \param req_height The requested height of the sprite
 * \param width      The actual width of the sprite
 * \param height     The actual height of the sprite
 * \return true on success, false otherwise
 */
bool image_redraw_os(osspriteop_id header, int x, int y, int req_width,
		int req_height, int width, int height)
{
	int size;
	os_factors f;
	osspriteop_trans_tab *table;
	os_error *error;

	error = xcolourtrans_generate_table_for_sprite(
			(osspriteop_area *)0x100, header,
			os_CURRENT_MODE,
			colourtrans_CURRENT_PALETTE,
			0, colourtrans_GIVEN_SPRITE, 0, 0, &size);
	if (error) {
		LOG(("xcolourtrans_generate_table_for_sprite: 0x%x: %s",
				error->errnum, error->errmess));
		return false;
	}

	table = calloc(size, sizeof(char));
	if (!table) {
		LOG(("malloc failed"));
		warn_user("NoMemory", 0);
		return false;
	}

	error = xcolourtrans_generate_table_for_sprite(
			(osspriteop_area *)0x100, header,
			os_CURRENT_MODE,
			colourtrans_CURRENT_PALETTE,
			table, colourtrans_GIVEN_SPRITE, 0, 0, 0);
	if (error) {
		LOG(("xcolourtrans_generate_table_for_sprite: 0x%x: %s",
				error->errnum, error->errmess));
		free(table);
		return false;
	}

	f.xmul = req_width;
	f.ymul = req_height;
	f.xdiv = width;
	f.ydiv = height;

	error = xosspriteop_put_sprite_scaled(osspriteop_PTR,
			(osspriteop_area *)0x100, header,
			x, (int)(y - req_height),
			8, &f, table);
	if (error) {
		LOG(("xosspriteop_put_sprite_scaled: 0x%x: %s",
				error->errnum, error->errmess));
		free(table);
		return false;
	}

	free(table);

	return true;
}