| 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 | } |