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annotate src/video/nds/SDL_ndsvideo.c @ 3055:cd863dd2082b

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author Sam Lantinga <slouken@libsdl.org>
date Sat, 07 Feb 2009 18:03:46 +0000
parents 99210400e8b9
children 83518f8fcd61
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 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 /* SDL Nintendo DS video driver implementation
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25 * based on dummy driver:
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26 * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
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27 * of this was cut-and-pasted from Stephane Peter's work in the AAlib
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28 * SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
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29 */
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30
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31 #include <stdio.h>
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32 #include <stdlib.h>
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33 #include <nds.h>
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34 #include <nds/arm9/video.h>
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35
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36 #include "SDL_video.h"
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37 #include "SDL_mouse.h"
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38 #include "../SDL_sysvideo.h"
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39 #include "../SDL_pixels_c.h"
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40 #include "../../events/SDL_events_c.h"
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41
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42 #include "SDL_ndsvideo.h"
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43 #include "SDL_ndsevents_c.h"
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44 #include "SDL_ndsrender_c.h"
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45
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46 #define NDSVID_DRIVER_NAME "nds"
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47
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48 /* Initialization/Query functions */
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49 static int NDS_VideoInit(_THIS);
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50 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
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51 static void NDS_VideoQuit(_THIS);
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52
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53
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54 /* SDL NDS driver bootstrap functions */
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55 static int
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56 NDS_Available(void)
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57 {
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58 return (1); /* always here */
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59 }
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60
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61 static void
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62 NDS_DeleteDevice(SDL_VideoDevice * device)
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63 {
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64 SDL_free(device);
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65 }
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66
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67 static SDL_VideoDevice *
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68 NDS_CreateDevice(int devindex)
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69 {
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70 SDL_VideoDevice *device;
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71
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72 /* Initialize all variables that we clean on shutdown */
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73 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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74 if (!device) {
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75 SDL_OutOfMemory();
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76 if (device) {
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77 SDL_free(device);
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78 }
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79 return (0);
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80 }
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81
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82 /* Set the function pointers */
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83 device->VideoInit = NDS_VideoInit;
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84 device->VideoQuit = NDS_VideoQuit;
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85 device->SetDisplayMode = NDS_SetDisplayMode;
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86 device->PumpEvents = NDS_PumpEvents;
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87
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88 device->num_displays = 2; /* DS = dual screens */
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89
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90 device->free = NDS_DeleteDevice;
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91
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92 return device;
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93 }
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94
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95 VideoBootStrap NDS_bootstrap = {
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96 NDSVID_DRIVER_NAME, "SDL NDS video driver",
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97 NDS_Available, NDS_CreateDevice
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98 };
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99
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100 int
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101 NDS_VideoInit(_THIS)
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102 {
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103 SDL_DisplayMode mode;
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104 int i;
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105
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106 /* simple 256x192x16x60 for now */
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107 mode.w = 256;
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108 mode.h = 192;
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109 mode.format = SDL_PIXELFORMAT_ABGR1555;
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110 mode.refresh_rate = 60;
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111 mode.driverdata = NULL;
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112
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113 SDL_AddBasicVideoDisplay(&mode);
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114 SDL_AddRenderDriver(0, &NDS_RenderDriver);
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115
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116 SDL_zero(mode);
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117 SDL_AddDisplayMode(0, &mode);
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118
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119 powerON(POWER_ALL_2D);
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120 irqInit();
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121 irqEnable(IRQ_VBLANK);
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122 NDS_SetDisplayMode(_this, &mode);
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123
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124 return 0;
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125 }
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126
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127 static int
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128 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
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129 {
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130 /* right now this function is just hard-coded for 256x192 ABGR1555 */
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131 videoSetMode(MODE_5_2D | DISPLAY_BG2_ACTIVE | DISPLAY_BG3_ACTIVE | DISPLAY_BG_EXT_PALETTE | DISPLAY_SPR_1D_LAYOUT | DISPLAY_SPR_1D_BMP | DISPLAY_SPR_1D_BMP_SIZE_256 | /* (try 128 if 256 is trouble.) */
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132 DISPLAY_SPR_ACTIVE | DISPLAY_SPR_EXT_PALETTE); /* display on main core
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133 with lots of flags set for
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134 flexibility/capacity to render */
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135
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136 /* hopefully these cover all the various things we might need to do */
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137 vramSetBankA(VRAM_A_MAIN_BG_0x06000000);
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138 vramSetBankB(VRAM_B_MAIN_BG_0x06020000);
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139 vramSetBankC(VRAM_C_SUB_BG_0x06200000);
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140 vramSetBankD(VRAM_D_MAIN_BG_0x06040000); /* not a typo. vram d can't sub */
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141 vramSetBankE(VRAM_E_MAIN_SPRITE);
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142 vramSetBankF(VRAM_F_OBJ_EXT_PALETTE);
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143 vramSetBankG(VRAM_G_BG_EXT_PALETTE);
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144 vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
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145 vramSetBankI(VRAM_I_SUB_SPRITE);
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146
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147 videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub
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148 TODO: this will change
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149 when multi-head is
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150 introduced in render */
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151
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152 return 0;
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153 }
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154
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155 void
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156 NDS_VideoQuit(_THIS)
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157 {
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158 videoSetMode(DISPLAY_SCREEN_OFF);
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159 videoSetModeSub(DISPLAY_SCREEN_OFF);
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160 vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
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161 vramSetBankE(VRAM_E_LCD);
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162 vramSetBankF(VRAM_F_LCD);
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163 vramSetBankG(VRAM_G_LCD);
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164 vramSetBankH(VRAM_H_LCD);
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165 vramSetBankI(VRAM_I_LCD);
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166 }
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167
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168 /* vi: set ts=4 sw=4 expandtab: */