Mercurial > sdl-ios-xcode
annotate src/video/riscos/SDL_riscossprite.c @ 3468:789b97008d8a
My first OpenGL shader! Momma will be so proud!
This shader implements the software renderer mask semantics where the source pixel is multiplied by the color and alpha modulation values and then any pixel with non-zero alpha is fully opaque.
The OpenGL renderer on Mac OS X now passes all the automated render tests! :)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 21 Nov 2009 05:29:31 +0000 |
parents | 99210400e8b9 |
children | f7b03b6838cb |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 /* |
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25 File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability |
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26 27 March 2003 |
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27 |
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28 Implements Sprite plotting code for wimp display.window |
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29 */ |
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30 |
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31 #include "kernel.h" |
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32 #include "swis.h" |
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33 |
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34 #include "SDL_stdinc.h" |
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35 #include "SDL_riscosvideo.h" |
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36 |
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37 extern void WIMP_ReadModeInfo(_THIS); |
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38 |
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39 void WIMP_PaletteChanged(_THIS); |
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40 |
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41 |
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42 /* Create sprite buffer for screen */ |
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43 |
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44 unsigned char * |
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45 WIMP_CreateBuffer(int width, int height, int bpp) |
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46 { |
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47 int size; |
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48 char sprite_name[12] = "display"; |
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49 unsigned char *buffer; |
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50 _kernel_swi_regs regs; |
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51 int bytesPerPixel; |
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52 int bytesPerRow; |
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53 int offsetToSpriteData = 60; |
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54 |
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55 switch (bpp) { |
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56 case 32: |
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57 bytesPerPixel = 4; |
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58 break; |
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59 case 16: |
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60 bytesPerPixel = 2; |
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61 break; |
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62 case 8: |
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63 bytesPerPixel = 1; |
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64 offsetToSpriteData += 2048; /* Add in size of palette */ |
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65 break; |
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66 default: |
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67 return NULL; |
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68 break; |
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69 } |
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70 |
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71 bytesPerRow = bytesPerPixel * width; |
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72 |
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73 if ((bytesPerRow & 3) != 0) { |
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74 bytesPerRow += 4 - (bytesPerRow & 3); |
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75 } |
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76 size = bytesPerRow * height; |
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77 |
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78 buffer = SDL_malloc((size_t) size + offsetToSpriteData); |
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79 if (!buffer) |
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80 return NULL; |
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81 |
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82 /* Initialise a sprite area */ |
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83 |
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84 *(unsigned int *) buffer = size + offsetToSpriteData; |
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85 *(unsigned int *) (buffer + 8) = 16; |
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86 |
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87 regs.r[0] = 256 + 9; |
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88 regs.r[1] = (unsigned int) buffer; |
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89 _kernel_swi(OS_SpriteOp, ®s, ®s); |
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90 |
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91 regs.r[0] = 256 + 15; |
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92 regs.r[1] = (unsigned int) buffer; |
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93 regs.r[2] = (unsigned int) &sprite_name; |
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94 regs.r[3] = 0; /* Palette flag: 0 = no palette */ |
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95 regs.r[4] = width; |
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96 regs.r[5] = height; |
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97 if (bpp == 8) { |
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98 /* Use old style mode number */ |
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99 regs.r[6] = 28; /* 8bpp 90x90dpi */ |
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100 } else { |
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101 regs.r[6] = (((bpp == 16) ? 5 : 6) << 27) /* Type 6 = 32bpp sprite, 5 = 16bpp sprite */ |
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102 |(90 << 14) /* Vertical dpi */ |
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103 |(90 << 1) /* Horizontal dpi */ |
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104 |1; /* Marker to distinguish between mode selectors and sprite modes */ |
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105 } |
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106 if (_kernel_swi(OS_SpriteOp, ®s, ®s) == NULL) { |
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107 if (bpp == 8) { |
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108 /* Modify sprite to take into account 256 colour palette */ |
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109 int *sprite = (int *) (buffer + 16); |
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110 /* Adjust sprite offsets */ |
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111 sprite[0] += 2048; |
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112 sprite[8] += 2048; |
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113 sprite[9] += 2048; |
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114 /* Adjust sprite area next free pointer */ |
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115 (*(int *) (buffer + 12)) += 2048; |
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116 |
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117 /* Don't need to set up palette as SDL sets up the default |
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118 256 colour palette */ |
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119 /* { |
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120 int *pal = sprite + 11; |
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121 unsigned int j; |
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122 unsigned int entry; |
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123 for (j = 0; j < 255; j++) |
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124 { |
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125 entry = (j << 24) | (j << 16) | (j << 8); |
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126 *pal++ = entry; |
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127 *pal++ = entry; |
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128 } |
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129 } |
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130 */ |
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131 } |
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132 } else { |
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133 SDL_free(buffer); |
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134 buffer = NULL; |
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135 } |
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136 |
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137 return buffer; |
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138 } |
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139 |
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140 |
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141 /* Setup translation buffers for the sprite plotting */ |
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142 |
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143 void |
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144 WIMP_SetupPlotInfo(_THIS) |
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145 { |
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146 _kernel_swi_regs regs; |
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147 int *sprite = ((int *) this->hidden->bank[1]) + 4; |
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148 |
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149 regs.r[0] = (unsigned int) this->hidden->bank[1]; |
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150 regs.r[1] = (unsigned int) sprite; |
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151 regs.r[2] = -1; /* Current mode */ |
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152 regs.r[3] = -1; /* Current palette */ |
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153 regs.r[4] = 0; /* Get size of buffer */ |
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154 regs.r[5] = 1 | 2 | 16; /* R1 - pointer to sprite and can use full palette words */ |
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155 regs.r[6] = 0; |
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156 regs.r[7] = 0; |
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157 |
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158 if (this->hidden->pixtrans) |
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159 SDL_free(this->hidden->pixtrans); |
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160 this->hidden->pixtrans = 0; |
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161 |
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162 /* Get the size required for the buffer */ |
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163 _kernel_swi(ColourTrans_GenerateTable, ®s, ®s); |
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164 if (regs.r[4]) { |
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165 this->hidden->pixtrans = SDL_malloc(regs.r[4]); |
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166 |
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167 regs.r[4] = (unsigned int) this->hidden->pixtrans; |
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168 /* Actually read the buffer */ |
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169 _kernel_swi(ColourTrans_GenerateTable, ®s, ®s); |
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170 } |
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171 } |
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172 |
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173 /* Plot the sprite in the given context */ |
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174 void |
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175 WIMP_PlotSprite(_THIS, int x, int y) |
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176 { |
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177 _kernel_swi_regs regs; |
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178 _kernel_oserror *err; |
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179 |
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180 regs.r[0] = 52 + 512; |
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181 regs.r[1] = (unsigned int) this->hidden->bank[1]; |
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182 regs.r[2] = (unsigned int) this->hidden->bank[1] + 16; |
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183 regs.r[3] = x; |
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184 regs.r[4] = y; |
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185 regs.r[5] = 0 | 32; /* Overwrite screen and pixtrans contains wide colour entries */ |
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186 regs.r[6] = 0; /* No scale factors i.e. 1:1 */ |
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187 regs.r[7] = (int) this->hidden->pixtrans; |
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188 |
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189 if ((err = _kernel_swi(OS_SpriteOp, ®s, ®s)) != 0) { |
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190 int *p = (int *) this->hidden->pixtrans; |
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191 printf("OS_SpriteOp failed \n%s\n", err->errmess); |
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192 printf("pixtrans %d\n", (int) this->hidden->pixtrans); |
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193 printf("%x %x %x\n", p[0], p[1], p[2]); |
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194 } |
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195 } |
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196 |
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197 |
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198 /* Wimp mode has changes so update colour mapping and pixel sizes |
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199 of windows and the sprites they plot */ |
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200 |
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201 void |
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202 WIMP_ModeChanged(_THIS) |
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203 { |
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204 int oldXeig = this->hidden->xeig; |
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205 int oldYeig = this->hidden->yeig; |
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206 |
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207 WIMP_ReadModeInfo(this); |
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208 |
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209 if (oldXeig == this->hidden->xeig && oldYeig == this->hidden->yeig) { |
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210 /* Only need to update the palette */ |
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211 WIMP_PaletteChanged(this); |
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212 } else { |
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213 _kernel_swi_regs regs; |
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214 int window_state[9]; |
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215 int extent[4]; |
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216 int currWidth, currHeight; |
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217 int newWidth, newHeight; |
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218 |
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219 /* Need to resize windows and update the palette */ |
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220 WIMP_SetupPlotInfo(this); |
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221 |
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222 |
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223 window_state[0] = this->hidden->window_handle; |
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224 regs.r[1] = (unsigned int) window_state; |
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225 _kernel_swi(Wimp_GetWindowState, ®s, ®s); |
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226 |
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227 currWidth = window_state[3] - window_state[1]; |
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228 currHeight = window_state[4] - window_state[2]; |
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229 |
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230 newWidth = (currWidth >> oldXeig) << this->hidden->xeig; |
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231 newHeight = (currHeight >> oldYeig) << this->hidden->yeig; |
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232 /* Need to avoid extent getting too small for visible part |
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233 of window */ |
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234 extent[0] = 0; |
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235 if (currHeight <= newHeight) { |
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236 extent[1] = -newHeight; |
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237 } else { |
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238 extent[1] = -currHeight; |
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239 } |
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240 if (currWidth <= newWidth) { |
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241 extent[2] = newWidth; |
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242 } else { |
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243 extent[2] = currWidth; |
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244 } |
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245 extent[3] = 0; |
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246 |
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247 regs.r[0] = this->hidden->window_handle; |
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248 regs.r[1] = (int) extent; |
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249 _kernel_swi(Wimp_SetExtent, ®s, ®s); |
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250 |
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251 /*TODO: May need to set flag to resize window on next open */ |
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252 } |
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253 } |
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254 |
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255 /* Palette has changed so update palettes used for windows sprites */ |
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256 |
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257 void |
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258 WIMP_PaletteChanged(_THIS) |
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259 { |
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260 WIMP_SetupPlotInfo(this); |
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261 } |
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262 |
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263 /* vi: set ts=4 sw=4 expandtab: */ |