e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | } |