|
1 /* |
|
2 SDL - Simple DirectMedia Layer |
|
3 Copyright (C) 1997-2004 Sam Lantinga |
|
4 |
|
5 This library is free software; you can redistribute it and/or |
|
6 modify it under the terms of the GNU Library General Public |
|
7 License as published by the Free Software Foundation; either |
|
8 version 2 of the License, or (at your option) any later version. |
|
9 |
|
10 This library is distributed in the hope that it will be useful, |
|
11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
13 Library General Public License for more details. |
|
14 |
|
15 You should have received a copy of the GNU Library General Public |
|
16 License along with this library; if not, write to the Free |
|
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|
18 |
|
19 Sam Lantinga |
|
20 slouken@libsdl.org |
|
21 */ |
|
22 #include "SDL_config.h" |
|
23 |
|
24 /* |
|
25 File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability |
|
26 27 March 2003 |
|
27 |
|
28 Implements Sprite plotting code for wimp display.window |
|
29 */ |
|
30 |
|
31 #include "kernel.h" |
|
32 #include "swis.h" |
|
33 |
|
34 #include "SDL_stdinc.h" |
|
35 #include "SDL_riscosvideo.h" |
|
36 |
|
37 extern void WIMP_ReadModeInfo(_THIS); |
|
38 |
|
39 void WIMP_PaletteChanged(_THIS); |
|
40 |
|
41 |
|
42 /* Create sprite buffer for screen */ |
|
43 |
|
44 unsigned char *WIMP_CreateBuffer(int width, int height, int bpp) |
|
45 { |
|
46 int size; |
|
47 char sprite_name[12] = "display"; |
|
48 unsigned char *buffer; |
|
49 _kernel_swi_regs regs; |
|
50 int bytesPerPixel; |
|
51 int bytesPerRow; |
|
52 int offsetToSpriteData = 60; |
|
53 |
|
54 switch(bpp) |
|
55 { |
|
56 case 32: bytesPerPixel = 4; break; |
|
57 case 16: bytesPerPixel = 2; break; |
|
58 case 8: |
|
59 bytesPerPixel = 1; |
|
60 offsetToSpriteData += 2048; /* Add in size of palette */ |
|
61 break; |
|
62 default: |
|
63 return NULL; |
|
64 break; |
|
65 } |
|
66 |
|
67 bytesPerRow = bytesPerPixel * width; |
|
68 |
|
69 if ((bytesPerRow & 3) != 0) |
|
70 { |
|
71 bytesPerRow += 4 - (bytesPerRow & 3); |
|
72 } |
|
73 size = bytesPerRow * height; |
|
74 |
|
75 buffer = SDL_malloc( (size_t) size + offsetToSpriteData ); |
|
76 if (!buffer) return NULL; |
|
77 |
|
78 /* Initialise a sprite area */ |
|
79 |
|
80 *(unsigned int *)buffer = size + offsetToSpriteData; |
|
81 *(unsigned int *)(buffer + 8) = 16; |
|
82 |
|
83 regs.r[0] = 256+9; |
|
84 regs.r[1] = (unsigned int)buffer; |
|
85 _kernel_swi(OS_SpriteOp, ®s, ®s); |
|
86 |
|
87 regs.r[0] = 256+15; |
|
88 regs.r[1] = (unsigned int)buffer; |
|
89 regs.r[2] = (unsigned int)&sprite_name; |
|
90 regs.r[3] = 0; /* Palette flag: 0 = no palette */ |
|
91 regs.r[4] = width; |
|
92 regs.r[5] = height; |
|
93 if (bpp == 8) |
|
94 { |
|
95 /* Use old style mode number */ |
|
96 regs.r[6] = 28; /* 8bpp 90x90dpi */ |
|
97 } else |
|
98 { |
|
99 regs.r[6] = (((bpp == 16) ? 5 : 6) << 27) /* Type 6 = 32bpp sprite, 5 = 16bpp sprite */ |
|
100 | (90 << 14) /* Vertical dpi */ |
|
101 | (90 << 1) /* Horizontal dpi */ |
|
102 | 1; /* Marker to distinguish between mode selectors and sprite modes */ |
|
103 } |
|
104 if (_kernel_swi(OS_SpriteOp, ®s, ®s) == NULL) |
|
105 { |
|
106 if (bpp == 8) |
|
107 { |
|
108 /* Modify sprite to take into account 256 colour palette */ |
|
109 int *sprite = (int *)(buffer + 16); |
|
110 /* Adjust sprite offsets */ |
|
111 sprite[0] += 2048; |
|
112 sprite[8] += 2048; |
|
113 sprite[9] += 2048; |
|
114 /* Adjust sprite area next free pointer */ |
|
115 (*(int *)(buffer+12)) += 2048; |
|
116 |
|
117 /* Don't need to set up palette as SDL sets up the default |
|
118 256 colour palette */ |
|
119 /* { |
|
120 int *pal = sprite + 11; |
|
121 unsigned int j; |
|
122 unsigned int entry; |
|
123 for (j = 0; j < 255; j++) |
|
124 { |
|
125 entry = (j << 24) | (j << 16) | (j << 8); |
|
126 *pal++ = entry; |
|
127 *pal++ = entry; |
|
128 } |
|
129 } |
|
130 */ |
|
131 } |
|
132 } else |
|
133 { |
|
134 SDL_free(buffer); |
|
135 buffer = NULL; |
|
136 } |
|
137 |
|
138 return buffer; |
|
139 } |
|
140 |
|
141 |
|
142 /* Setup translation buffers for the sprite plotting */ |
|
143 |
|
144 void WIMP_SetupPlotInfo(_THIS) |
|
145 { |
|
146 _kernel_swi_regs regs; |
|
147 int *sprite = ((int *)this->hidden->bank[1])+4; |
|
148 |
|
149 regs.r[0] = (unsigned int)this->hidden->bank[1]; |
|
150 regs.r[1] = (unsigned int)sprite; |
|
151 regs.r[2] = -1; /* Current mode */ |
|
152 regs.r[3] = -1; /* Current palette */ |
|
153 regs.r[4] = 0; /* Get size of buffer */ |
|
154 regs.r[5] = 1|2|16; /* R1 - pointer to sprite and can use full palette words */ |
|
155 regs.r[6] = 0; |
|
156 regs.r[7] = 0; |
|
157 |
|
158 if (this->hidden->pixtrans) SDL_free(this->hidden->pixtrans); |
|
159 this->hidden->pixtrans = 0; |
|
160 |
|
161 /* Get the size required for the buffer */ |
|
162 _kernel_swi(ColourTrans_GenerateTable, ®s, ®s); |
|
163 if (regs.r[4]) |
|
164 { |
|
165 this->hidden->pixtrans = SDL_malloc(regs.r[4]); |
|
166 |
|
167 regs.r[4] = (unsigned int)this->hidden->pixtrans; |
|
168 /* Actually read the buffer */ |
|
169 _kernel_swi(ColourTrans_GenerateTable, ®s, ®s); |
|
170 } |
|
171 } |
|
172 |
|
173 /* Plot the sprite in the given context */ |
|
174 void WIMP_PlotSprite(_THIS, int x, int y) |
|
175 { |
|
176 _kernel_swi_regs regs; |
|
177 _kernel_oserror *err; |
|
178 |
|
179 regs.r[0] = 52 + 512; |
|
180 regs.r[1] = (unsigned int)this->hidden->bank[1]; |
|
181 regs.r[2] = (unsigned int)this->hidden->bank[1]+16; |
|
182 regs.r[3] = x; |
|
183 regs.r[4] = y; |
|
184 regs.r[5] = 0|32; /* Overwrite screen and pixtrans contains wide colour entries */ |
|
185 regs.r[6] = 0; /* No scale factors i.e. 1:1 */ |
|
186 regs.r[7] = (int)this->hidden->pixtrans; |
|
187 |
|
188 if ((err = _kernel_swi(OS_SpriteOp, ®s, ®s)) != 0) |
|
189 { |
|
190 int *p = (int *)this->hidden->pixtrans; |
|
191 printf("OS_SpriteOp failed \n%s\n",err->errmess); |
|
192 printf("pixtrans %d\n", (int)this->hidden->pixtrans); |
|
193 printf("%x %x %x\n", p[0], p[1], p[2]); |
|
194 } |
|
195 } |
|
196 |
|
197 |
|
198 /* Wimp mode has changes so update colour mapping and pixel sizes |
|
199 of windows and the sprites they plot */ |
|
200 |
|
201 void WIMP_ModeChanged(_THIS) |
|
202 { |
|
203 int oldXeig = this->hidden->xeig; |
|
204 int oldYeig = this->hidden->yeig; |
|
205 |
|
206 WIMP_ReadModeInfo(this); |
|
207 |
|
208 if (oldXeig == this->hidden->xeig && oldYeig == this->hidden->yeig) |
|
209 { |
|
210 /* Only need to update the palette */ |
|
211 WIMP_PaletteChanged(this); |
|
212 } else |
|
213 { |
|
214 _kernel_swi_regs regs; |
|
215 int window_state[9]; |
|
216 int extent[4]; |
|
217 int currWidth, currHeight; |
|
218 int newWidth, newHeight; |
|
219 |
|
220 /* Need to resize windows and update the palette */ |
|
221 WIMP_SetupPlotInfo(this); |
|
222 |
|
223 |
|
224 window_state[0] = this->hidden->window_handle; |
|
225 regs.r[1] = (unsigned int)window_state; |
|
226 _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
|
227 |
|
228 currWidth = window_state[3] - window_state[1]; |
|
229 currHeight = window_state[4] - window_state[2]; |
|
230 |
|
231 newWidth = (currWidth >> oldXeig) << this->hidden->xeig; |
|
232 newHeight = (currHeight >> oldYeig) << this->hidden->yeig; |
|
233 /* Need to avoid extent getting too small for visible part |
|
234 of window */ |
|
235 extent[0] = 0; |
|
236 if (currHeight <= newHeight) |
|
237 { |
|
238 extent[1] = -newHeight; |
|
239 } else |
|
240 { |
|
241 extent[1] = -currHeight; |
|
242 } |
|
243 if (currWidth <= newWidth) |
|
244 { |
|
245 extent[2] = newWidth; |
|
246 } else |
|
247 { |
|
248 extent[2] = currWidth; |
|
249 } |
|
250 extent[3] = 0; |
|
251 |
|
252 regs.r[0] = this->hidden->window_handle; |
|
253 regs.r[1] = (int)extent; |
|
254 _kernel_swi(Wimp_SetExtent, ®s, ®s); |
|
255 |
|
256 /*TODO: May need to set flag to resize window on next open */ |
|
257 } |
|
258 } |
|
259 |
|
260 /* Palette has changed so update palettes used for windows sprites */ |
|
261 |
|
262 void WIMP_PaletteChanged(_THIS) |
|
263 { |
|
264 WIMP_SetupPlotInfo(this); |
|
265 } |