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annotate src/video/riscos/SDL_riscossprite.c @ 3701:fb905d5674cc

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Fixed showing and hiding fullscreen windows
author Sam Lantinga <slouken@libsdl.org>
date Mon, 01 Feb 2010 01:19:37 +0000
parents f7b03b6838cb
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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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c71e05b4dc2e More header massaging... works great on Windows. ;-)
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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, &regs, &regs);
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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, &regs, &regs) == 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;
630
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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)
630
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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;
630
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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;
630
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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, &regs, &regs);
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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, &regs, &regs);
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170 }
630
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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)
630
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176 {
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177 _kernel_swi_regs regs;
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178 _kernel_oserror *err;
630
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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;
630
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188
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189 if ((err = _kernel_swi(OS_SpriteOp, &regs, &regs)) != 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 }
630
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195 }
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196
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parents:
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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)
630
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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;
630
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206
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207 WIMP_ReadModeInfo(this);
630
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diff changeset
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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diff changeset
212 } else {
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213 _kernel_swi_regs regs;
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diff changeset
214 int window_state[9];
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215 int extent[4];
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diff changeset
216 int currWidth, currHeight;
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diff changeset
217 int newWidth, newHeight;
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diff changeset
218
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diff changeset
219 /* Need to resize windows and update the palette */
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diff changeset
220 WIMP_SetupPlotInfo(this);
630
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221
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
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parents:
diff changeset
222
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223 window_state[0] = this->hidden->window_handle;
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diff changeset
224 regs.r[1] = (unsigned int) window_state;
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diff changeset
225 _kernel_swi(Wimp_GetWindowState, &regs, &regs);
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diff changeset
226
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diff changeset
227 currWidth = window_state[3] - window_state[1];
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228 currHeight = window_state[4] - window_state[2];
630
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229
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230 newWidth = (currWidth >> oldXeig) << this->hidden->xeig;
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diff changeset
231 newHeight = (currHeight >> oldYeig) << this->hidden->yeig;
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diff changeset
232 /* Need to avoid extent getting too small for visible part
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diff changeset
233 of window */
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diff changeset
234 extent[0] = 0;
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diff changeset
235 if (currHeight <= newHeight) {
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diff changeset
236 extent[1] = -newHeight;
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diff changeset
237 } else {
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diff changeset
238 extent[1] = -currHeight;
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diff changeset
239 }
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diff changeset
240 if (currWidth <= newWidth) {
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diff changeset
241 extent[2] = newWidth;
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diff changeset
242 } else {
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diff changeset
243 extent[2] = currWidth;
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diff changeset
244 }
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Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
245 extent[3] = 0;
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parents: 1402
diff changeset
246
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Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
247 regs.r[0] = this->hidden->window_handle;
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parents: 1402
diff changeset
248 regs.r[1] = (int) extent;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
249 _kernel_swi(Wimp_SetExtent, &regs, &regs);
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diff changeset
250
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
251 /*TODO: May need to set flag to resize window on next open */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
252 }
630
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
253 }
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
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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: */