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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/* FreeSCI 0.3.1+ graphics subsystem helper functions */
#ifndef SCI_GFX_GFX_TOOLS_H
#define SCI_GFX_GFX_TOOLS_H
#include "graphics/pixelformat.h"
#include "sci/gfx/gfx_system.h"
#include "sci/gfx/gfx_driver.h"
namespace Sci {
enum gfx_xlate_filter_t {
GFX_XLATE_FILTER_NONE,
GFX_XLATE_FILTER_LINEAR,
GFX_XLATE_FILTER_TRILINEAR
};
extern int gfx_crossblit_alpha_threshold; /* Crossblitting functions use this value as threshold
** for distinguishing between transparent and opaque
** wrt alpha values */
gfx_mode_t *gfx_new_mode(int xfact, int yfact, const Graphics::PixelFormat &format, int palette, int flags);
/* Allocates a new gfx_mode_t structure with the specified parameters
** Parameters: (int x int) xfact x yfact: Horizontal and vertical scaling factors
** (Graphics::PixelFormat) format: pixel format description
** (int) palette: Number of palette colors, 0 if we're not in palette mode
** (int) flags: GFX_MODE_FLAG_* values ORred together, or just 0
** Returns : (gfx_mode_t *) A newly allocated gfx_mode_t structure
*/
void gfx_clip_box_basic(rect_t *box, int maxx, int maxy);
/* Clips a rect_t
** Parameters: (rect_t *) box: Pointer to the box to clip
** (int x int) maxx, maxy: Maximum allowed width and height
** Returns : (void)
*/
void gfx_free_mode(gfx_mode_t *mode);
/* Frees all memory allocated by a mode structure
** Parameters: (gfx_mode_t *) mode: The mode to free
** Returns : (void)
*/
gfx_pixmap_t *gfx_new_pixmap(int xl, int yl, int resid, int loop, int cel);
/* Creates a new pixmap structure
** Parameters: (int x int) xl x yl: The dimensions (in SCI coordinates) of the pixmap
** (int) resid: The pixmap's resource ID, or GFX_RESID_NONE
** (int) loop: For views: The pixmap's loop number
** (int) cel: For cels: The pixmap's cel number
** Returns : (gfx_pixmap_t *) The newly allocated pixmap
** The following fiels are initialized:
** ID, loop, cel, index_xl, index_yl, xl, yl, data <- NULL,
** alpha_map <- NULL, internal.handle <- 0, internal.info <- NULL, colors <- NULL,
** index_scaled <- 0
*/
gfx_pixmap_t *gfx_clone_pixmap(gfx_pixmap_t *pixmap, gfx_mode_t *mode);
/* Clones a pixmap, minus its index data, palette and driver-specific handles
** Parameters: (gfx_pixmap_t *) pixmap: The pixmap to clone
** (gfx_mode_t *) mode: The mode to be applied to the pixmap
** Returns : (gfx_pixmap_t *) The clone
*/
gfx_pixmap_t *gfx_pixmap_alloc_index_data(gfx_pixmap_t *pixmap);
/* Allocates the index_data field of a pixmap
** Parameters: (gfx_pixmap_t *) pixmap: The pixmap to allocate for
** Returns : (gfx_pixmap_t *) pixmap
*/
gfx_pixmap_t *gfx_pixmap_free_index_data(gfx_pixmap_t *pixmap);
/* Frees the index_data field of a pixmap
** Parameters: (gfx_pixmap_t *) pixmap: The pixmap to modify
** Returns : (gfx_pixmap_t *) pixmap
*/
gfx_pixmap_t *gfx_pixmap_alloc_data(gfx_pixmap_t *pixmap, gfx_mode_t *mode);
/* Allocates the data field of a pixmap
** Parameters: (gfx_pixmap_t *) pixmap: The pixmap to allocate for
** (gfx_mode_t *) mode: The mode the memory is to be allocated for
** Returns : (gfx_pixmap_t *) pixmap
*/
gfx_pixmap_t *gfx_pixmap_free_data(gfx_pixmap_t *pixmap);
/* Frees the memory allocated for a pixmap's data field
** Parameters: (gfx_pixmap_t *) pixmap: The pixmap to modify
** Returns : (gfx_pixmap_t *) pixmap
*/
void gfx_free_pixmap(gfx_driver_t *driver, gfx_pixmap_t *pxm);
/* Frees all memory associated with a pixmap
** Parameters: (gfx_driver_t *) driver: The driver the pixmap is to be removed from
** (gfx_pixmap_t *) pxm: The pixmap to free
** Returns : (void)
*/
void gfx_draw_line_pixmap_i(gfx_pixmap_t *pxm, Common::Point start, Common::Point end, int color);
/* Draws a line to a pixmap's index data buffer
** Parameters: (gfx_pixmap_t *) pxm: The pixmap to draw to
** (Common::Point) start: Starting point of the line to draw
** (Common::Point) end: End point of the line to draw
** (int) color: The byte value to write
** Returns : (void)
** Remember, this only draws to the /index/ buffer, not to the drawable buffer.
** The line is not clipped. Invalid x, y, x1, y1 values will result in memory corruption.
*/
void gfx_draw_box_pixmap_i(gfx_pixmap_t *pxm, rect_t box, int color);
/* Draws a filled rectangular area to a pixmap's index buffer
** Parameters: (gfx_pixmap_t *) pxm: The pixmap to draw to
** (rect_t) box: The box to fill
** (int) color: The color to use for drawing
** Returns : (void)
** This function only draws to the index buffer.
*/
void gfx_copy_pixmap_box_i(gfx_pixmap_t *dest, gfx_pixmap_t *src, rect_t box);
/* Copies part of a pixmap to another pixmap, with clipping
** Parameters: (gfx_pixmap_t *) dest: The destination pixmap
** (gfx_pixmap_t *) src: The source pixmap
** (rect_t) box: The area to copy
** Returns : (void)
*/
void gfx_xlate_pixmap(gfx_pixmap_t *pxm, gfx_mode_t *mode, gfx_xlate_filter_t filter);
/* Translates a pixmap's index data to drawable graphics data
** Parameters: (gfx_pixmap_t *) pxm: The pixmap to translate
** (gfx_mode_t *) mode: The mode according which to scale
** (gfx_xlate_filter_t) filter: How to filter the data
** Returns : (void)
*/
#define GFX_CROSSBLIT_FLAG_DATA_IS_HOMED (1<<0)
/* Means that the first byte in the visual data refers to the
** point corresponding to (dest.x, dest.y) */
int gfx_crossblit_pixmap(gfx_mode_t *mode, gfx_pixmap_t *pxm, int priority,
rect_t src_coords, rect_t dest_coords, byte *dest, int dest_line_width,
byte *priority_dest, int priority_line_width, int priority_skip, int flags);
/* Transfers the non-transparent part of a pixmap to a linear pixel buffer
** Parameters: (gfx_mode_t *) mode: The graphics mode of the target buffer
** (gfx_pixmap_t *) pxm: The pixmap to transfer
** (int priority): The pixmap's priority
** (rect_t) src_coords: The source coordinates within the pixmap
** (rect_t) dest_coords: The destination coordinates (no scaling)
** (byte *) dest: Memory position of the upper left pixel of the
** linear pixel buffer
** (int) dest_line_width: Byte offset of the very first pixel in the
** second line of the linear pixel buffer,
** relative to dest.
** (byte *) priority_dest: Destination buffer for the pixmap's priority
** values
** (int) priority_line_width: Byte offset of the first pixel in the
** second line of the priority buffer
** (int) priority_skip: Amount of bytes allocated by each priority value
** (int) flags: Any crossblit flags
** Returns : (int) GFX_OK, or GFX_ERROR if the specified mode was invalid or unsupported
** A 'linear buffer' in this context means a data buffer containing an entire
** screen (visual or priority), with fixed offsets between each data row, and
** linear access.
*/
int gfx_alloc_color(gfx_palette_t *pal, gfx_pixmap_color_t *color);
/* Allocates a color entry for the specified pixmap color
** Parameters: (gfx_palette_t *) pal: The palette structure the color should be allocated in
** (gfx_pixmap_color_t *) color: The color to allocate
** Returns : (int) GFX_ERROR if any error occured, GFX_OK if the color could be mapped to an
** existing color or a positive value if a new color was allocated in the
** palette.
*/
int gfx_free_color(gfx_palette_t *pal, gfx_pixmap_color_t *color);
/* Frees the color entry allocated for the specified pixmap color
** Parameters: (gfx_palette_t *) pal: The palette structure the color was previously allocated in
** (gfx_pixmap_color_t *) color: The color to free
** Returns : (int) GFX_ERROR if any error occured, GFX_OK otherwise
*/
gfx_pixmap_t *gfx_pixmap_scale_index_data(gfx_pixmap_t *pixmap, gfx_mode_t *mode);
/* Scales the index data associated with a pixmap
** Parameters: (gfx_pixmap_t *) pixmap: The pixmap whose index data should be scaled
** (gfx_mode_t *) mode: The mode to scale it to
** Returns : (gfx_pixmap_t *) pixmap
*/
} // End of namespace Sci
#endif // SCI_GFX_GFX_TOOLS_H
|
