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annotate src/video/nds/SDL_ndsvideo.c @ 2682:f7594fc66bda gsoc2008_nds

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Some debug work on the video driver, shows an error in the BG's vertical placement
author Darren Alton <dalton@stevens.edu>
date Sat, 26 Jul 2008 05:52:59 +0000
parents c15b6c758be5
children 71c56e900f8b
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 /* 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/sprite.h>
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35 #include <nds/arm9/trig_lut.h>
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36 #include <nds/arm9/video.h>
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37
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38 #include "SDL_video.h"
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39 #include "SDL_mouse.h"
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40 #include "../SDL_sysvideo.h"
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41 #include "../SDL_pixels_c.h"
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42 #include "../../events/SDL_events_c.h"
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43
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44 #include "SDL_ndsvideo.h"
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45 #include "SDL_ndsevents_c.h"
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46 #include "SDL_ndsrender_c.h"
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47
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48 #define NDSVID_DRIVER_NAME "nds"
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49
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50 /* Initialization/Query functions */
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51 static int NDS_VideoInit(_THIS);
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52 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
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53 static void NDS_VideoQuit(_THIS);
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54
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55 /* NDS sprite-related functions */
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56
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57 #define SPRITE_DMA_CHANNEL 3
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58 #define SPRITE_ANGLE_MASK 0x01FF
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59
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60 void
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61 NDS_OAM_Update(tOAM *oam)
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62 {
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63 DC_FlushAll();
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64 dmaCopyHalfWords(SPRITE_DMA_CHANNEL, oam->spriteBuffer, OAM,
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65 SPRITE_COUNT * sizeof(SpriteEntry));
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66 }
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67
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68 void
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69 NDS_OAM_RotateSprite(SpriteRotation *spriteRotation, u16 angle)
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70 {
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71 s16 s = SIN[angle & SPRITE_ANGLE_MASK] >> 4;
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72 s16 c = COS[angle & SPRITE_ANGLE_MASK] >> 4;
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73
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74 spriteRotation->hdx = c;
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75 spriteRotation->hdy = s;
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76 spriteRotation->vdx = -s;
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77 spriteRotation->vdy = c;
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78 }
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79
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80 void
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81 NDS_OAM_Init(tOAM *oam)
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82 {
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83 int i;
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84 for(i = 0; i < SPRITE_COUNT; i++) {
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85 oam->spriteBuffer[i].attribute[0] = ATTR0_DISABLED;
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86 oam->spriteBuffer[i].attribute[1] = 0;
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87 oam->spriteBuffer[i].attribute[2] = 0;
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88 }
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89 for(i = 0; i < MATRIX_COUNT; i++) {
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90 NDS_OAM_RotateSprite(&(oam->matrixBuffer[i]), 0);
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91 }
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92 swiWaitForVBlank();
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93 NDS_OAM_Update(oam);
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94 }
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95
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96 void
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97 NDS_OAM_HideSprite(SpriteEntry *spriteEntry)
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98 {
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99 spriteEntry->isRotoscale = 0;
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100 spriteEntry->isHidden = 1;
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101 }
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102
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103 void
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104 NDS_OAM_ShowSprite(SpriteEntry *spriteEntry, int affine, int double_bound)
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105 {
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106 if (affine) {
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107 spriteEntry->isRotoscale = 1;
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108 spriteEntry->rsDouble = double_bound;
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109 } else {
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110 spriteEntry->isHidden = 0;
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111 }
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112 }
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113
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114
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115 /* SDL NDS driver bootstrap functions */
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116 static int
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117 NDS_Available(void)
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118 {
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119 /*const char *envr = SDL_getenv("SDL_VIDEODRIVER");*/
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120 /*printf("NDS_Available()\n"); */
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121 return (1);
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122 }
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123
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124 static void
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125 NDS_DeleteDevice(SDL_VideoDevice * device)
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126 {
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127 SDL_free(device);
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128 }
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129
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130 static SDL_VideoDevice *
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131 NDS_CreateDevice(int devindex)
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132 {
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133 SDL_VideoDevice *device;
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134 /*printf("NDS_CreateDevice(%d)\n", devindex); */
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135
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136 printf("+NDS_CreateDevice\n");
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137 /* Initialize all variables that we clean on shutdown */
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138 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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139 if (!device) {
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140 SDL_OutOfMemory();
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141 if (device) {
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142 SDL_free(device);
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143 }
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144 return (0);
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145 }
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146
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147 /* Set the function pointers */
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148 device->VideoInit = NDS_VideoInit;
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149 device->VideoQuit = NDS_VideoQuit;
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150 device->SetDisplayMode = NDS_SetDisplayMode;
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151 device->PumpEvents = NDS_PumpEvents;
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152
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153 device->num_displays = 2; /* DS = dual screens */
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154
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155 device->free = NDS_DeleteDevice;
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156
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157 printf("-NDS_CreateDevice\n");
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158 return device;
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159 }
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160
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161 VideoBootStrap NDS_bootstrap = {
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162 NDSVID_DRIVER_NAME, "SDL NDS video driver",
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163 NDS_Available, NDS_CreateDevice
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164 };
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165
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166 int
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167 NDS_VideoInit(_THIS)
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168 {
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169 SDL_DisplayMode mode;
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170 int i;
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171
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172 printf("+NDS_VideoInit\n");
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173 /* simple 256x192x16x60 for now */
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174 mode.w = 256;
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175 mode.h = 192;
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176 mode.format = SDL_PIXELFORMAT_ABGR1555;
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177 mode.refresh_rate = 60;
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178 mode.driverdata = NULL;
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179
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180 SDL_AddBasicVideoDisplay(&mode);
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181 SDL_AddRenderDriver(0, &NDS_RenderDriver);
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182 /*SDL_AddBasicVideoDisplay(&mode); two screens, same mode. uncomment later
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183 SDL_AddRenderDriver(1, &NDS_RenderDriver);*/
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184
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185 SDL_zero(mode);
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186 SDL_AddDisplayMode(0, &mode);
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187
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188 /* hackish stuff to get things up and running for now, and for a console */
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189 powerON(POWER_ALL_2D);
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190 irqInit();
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191 irqEnable(IRQ_VBLANK);
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192 NDS_SetDisplayMode(_this, &mode);
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193 printf("-NDS_VideoInit\n");
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194 return 0;
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195 }
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196
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197 static int
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198 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
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199 {
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200 printf("+NDS_SetDisplayMode\n");
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201 /* right now this function is just hard-coded for 256x192 ABGR1555 */
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202 videoSetMode(MODE_5_2D |
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203 DISPLAY_BG2_ACTIVE | DISPLAY_BG3_ACTIVE |
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204 DISPLAY_SPR_1D_LAYOUT | DISPLAY_SPR_ACTIVE); /* display on main core */
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205 videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub */
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206 vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_MAIN_BG_0x06020000,
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207 VRAM_C_SUB_BG_0x06200000, VRAM_D_MAIN_BG_0x06040000);
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208 vramSetBankE(VRAM_E_MAIN_SPRITE);
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209 /* set up console for debug text 'n stuff */
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210 SUB_BG0_CR = BG_MAP_BASE(31);
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211 BG_PALETTE_SUB[255] = RGB15(31, 31, 31);
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212 /* debugging purposes, uncomment this later. then remove it & add 2screen.
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213 consoleInitDefault((u16 *) SCREEN_BASE_BLOCK_SUB(31),
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214 (u16 *) CHAR_BASE_BLOCK_SUB(0), 16);*/
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215 printf("-NDS_SetDisplayMode\n");
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216 return 0;
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217 }
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218
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219 void
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220 NDS_VideoQuit(_THIS)
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221 {
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222 printf("+NDS_VideoQuit\n");
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223 videoSetMode(DISPLAY_SCREEN_OFF);
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224 videoSetModeSub(DISPLAY_SCREEN_OFF);
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225 vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
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226 printf("-NDS_VideoQuit\n");
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227 }
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228