Mercurial > sdl-ios-xcode
annotate src/video/nds/SDL_ndsvideo.c @ 2677:6386764eb222 gsoc2008_nds
Starting to work on a more complete video driver.
author | Darren Alton <dalton@stevens.edu> |
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date | Wed, 02 Jul 2008 13:59:30 +0000 |
parents | 24a6b3588eac |
children | bc3e3e889f6d |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 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 /* Dummy SDL video driver implementation; this is just enough to make an |
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25 * SDL-based application THINK it's got a working video driver, for |
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26 * applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it, |
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27 * and also for use as a collection of stubs when porting SDL to a new |
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28 * platform for which you haven't yet written a valid video driver. |
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29 * |
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30 * This is also a great way to determine bottlenecks: if you think that SDL |
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31 * is a performance problem for a given platform, enable this driver, and |
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32 * then see if your application runs faster without video overhead. |
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33 * |
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34 * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion |
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35 * of this was cut-and-pasted from Stephane Peter's work in the AAlib |
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36 * SDL video driver. Renamed to "DUMMY" by Sam Lantinga. |
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37 */ |
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38 |
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39 #include <stdio.h> |
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40 #include <stdlib.h> |
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41 #include <nds.h> |
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42 |
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43 #include "SDL_video.h" |
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44 #include "SDL_mouse.h" |
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45 #include "../SDL_sysvideo.h" |
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46 #include "../SDL_pixels_c.h" |
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47 #include "../../events/SDL_events_c.h" |
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48 |
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49 #include "SDL_ndsvideo.h" |
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50 #include "SDL_ndsevents_c.h" |
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51 #include "SDL_ndsrender_c.h" |
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52 |
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53 #define NDSVID_DRIVER_NAME "nds" |
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54 |
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55 /* Initialization/Query functions */ |
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56 static int NDS_VideoInit(_THIS); |
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57 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode); |
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58 static void NDS_VideoQuit(_THIS); |
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59 |
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60 /* DUMMY driver bootstrap functions */ |
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61 |
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62 static int |
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63 NDS_Available(void) |
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64 { |
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65 const char *envr = SDL_getenv("SDL_VIDEODRIVER"); |
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66 /*printf("NDS_Available()\n"); */ |
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67 return (1); |
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68 } |
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69 |
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70 static void |
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71 NDS_DeleteDevice(SDL_VideoDevice * device) |
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72 { |
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73 SDL_free(device); |
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74 } |
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75 |
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76 static SDL_VideoDevice * |
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77 NDS_CreateDevice(int devindex) |
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78 { |
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79 SDL_VideoDevice *device; |
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80 /*printf("NDS_CreateDevice(%d)\n", devindex); */ |
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81 |
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82 /* Initialize all variables that we clean on shutdown */ |
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83 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice)); |
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84 if (!device) { |
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85 SDL_OutOfMemory(); |
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86 if (device) { |
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87 SDL_free(device); |
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88 } |
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89 return (0); |
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90 } |
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91 |
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92 /* Set the function pointers */ |
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93 device->VideoInit = NDS_VideoInit; |
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94 device->VideoQuit = NDS_VideoQuit; |
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95 device->SetDisplayMode = NDS_SetDisplayMode; |
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96 device->PumpEvents = NDS_PumpEvents; |
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97 |
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98 device->num_displays = 2; /* DS = dual screens */ |
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99 |
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100 device->free = NDS_DeleteDevice; |
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101 |
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102 return device; |
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103 } |
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104 |
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105 VideoBootStrap NDS_bootstrap = { |
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106 NDSVID_DRIVER_NAME, "SDL NDS video driver", |
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107 NDS_Available, NDS_CreateDevice |
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108 }; |
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109 |
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110 int |
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111 NDS_VideoInit(_THIS) |
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112 { |
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113 SDL_DisplayMode mode; |
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114 int i; |
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115 |
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116 /* simple 256x192x15x60 for now */ |
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117 mode.w = 256; |
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118 mode.h = 192; |
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119 mode.format = SDL_PIXELFORMAT_BGR555; |
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120 mode.refresh_rate = 60; |
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121 mode.driverdata = NULL; |
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122 |
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123 SDL_AddBasicVideoDisplay(&mode); |
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124 SDL_AddRenderDriver(0, &NDS_RenderDriver); |
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125 |
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126 SDL_zero(mode); |
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127 SDL_AddDisplayMode(0, &mode); |
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128 |
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129 /* hackish stuff to get things up and running for now, and for a console */ |
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130 powerON(POWER_ALL); |
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131 videoSetMode(MODE_FB0); |
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132 videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub */ |
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133 |
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134 vramSetBankA(VRAM_A_LCD); |
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135 vramSetBankC(VRAM_C_SUB_BG); |
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136 |
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137 irqInit(); |
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138 irqEnable(IRQ_VBLANK); |
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139 /* set up console for debug text 'n stuff */ |
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140 SUB_BG0_CR = BG_MAP_BASE(31); |
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141 BG_PALETTE_SUB[255] = RGB15(31, 31, 31); |
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142 consoleInitDefault((u16 *) SCREEN_BASE_BLOCK_SUB(31), |
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143 (u16 *) CHAR_BASE_BLOCK_SUB(0), 16); |
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144 |
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145 /*NDS_SetDisplayMode(_this, &mode); */ |
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146 return 0; |
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147 } |
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148 |
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149 static int |
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150 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode) |
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151 { |
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152 /* right now this function is just hard-coded for 256x192 ABGR1555 */ |
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153 #if 0 |
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154 videoSetMode(MODE_5_2D | DISPLAY_BG3_ACTIVE); /* display on main core */ |
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155 videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub */ |
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156 vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_LCD, |
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157 VRAM_C_SUB_BG, VRAM_D_LCD); |
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158 |
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159 /* maps well to the 256x192 screen anyway. note: need VRAM_B for bigger */ |
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160 BG3_CR = BG_BMP16_256x256; |
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161 /* affine transformation matrix. nothing too fancy here */ |
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162 BG3_XDX = 0x100; |
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163 BG3_XDY = 0; |
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164 BG3_YDX = 0; |
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165 BG3_YDY = 0x100; |
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166 /* x/y position */ |
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167 BG3_CX = 0; |
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168 BG3_CY = 0; |
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169 #endif |
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170 return 0; |
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171 } |
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172 |
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173 void |
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174 NDS_VideoQuit(_THIS) |
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175 { |
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176 } |