src/video/nds/SDL_ndsvideo.c
branchgsoc2008_nds
changeset 2680 4135aa9c5645
parent 2679 bc3e3e889f6d
child 2681 c15b6c758be5
equal deleted inserted replaced
2679:bc3e3e889f6d 2680:4135aa9c5645
    19     Sam Lantinga
    19     Sam Lantinga
    20     slouken@libsdl.org
    20     slouken@libsdl.org
    21 */
    21 */
    22 #include "SDL_config.h"
    22 #include "SDL_config.h"
    23 
    23 
    24 /* Dummy SDL video driver implementation; this is just enough to make an
    24 /* SDL Nintendo DS video driver implementation
    25  *  SDL-based application THINK it's got a working video driver, for
    25  * based on dummy driver:
    26  *  applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
       
    27  *  and also for use as a collection of stubs when porting SDL to a new
       
    28  *  platform for which you haven't yet written a valid video driver.
       
    29  *
       
    30  * This is also a great way to determine bottlenecks: if you think that SDL
       
    31  *  is a performance problem for a given platform, enable this driver, and
       
    32  *  then see if your application runs faster without video overhead.
       
    33  *
       
    34  * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
    26  * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
    35  *  of this was cut-and-pasted from Stephane Peter's work in the AAlib
    27  *  of this was cut-and-pasted from Stephane Peter's work in the AAlib
    36  *  SDL video driver.  Renamed to "DUMMY" by Sam Lantinga.
    28  *  SDL video driver.  Renamed to "DUMMY" by Sam Lantinga.
    37  */
    29  */
    38 
    30 
    39 #include <stdio.h>
    31 #include <stdio.h>
    40 #include <stdlib.h>
    32 #include <stdlib.h>
    41 #include <nds.h>
    33 #include <nds.h>
       
    34 #include <nds/arm9/sprite.h>
       
    35 #include <nds/arm9/trig_lut.h>
       
    36 #include <nds/arm9/video.h>
    42 
    37 
    43 #include "SDL_video.h"
    38 #include "SDL_video.h"
    44 #include "SDL_mouse.h"
    39 #include "SDL_mouse.h"
    45 #include "../SDL_sysvideo.h"
    40 #include "../SDL_sysvideo.h"
    46 #include "../SDL_pixels_c.h"
    41 #include "../SDL_pixels_c.h"
    55 /* Initialization/Query functions */
    50 /* Initialization/Query functions */
    56 static int NDS_VideoInit(_THIS);
    51 static int NDS_VideoInit(_THIS);
    57 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
    52 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
    58 static void NDS_VideoQuit(_THIS);
    53 static void NDS_VideoQuit(_THIS);
    59 
    54 
    60 /* DUMMY driver bootstrap functions */
    55 /* NDS sprite-related functions */
    61 
    56 
       
    57 #define SPRITE_DMA_CHANNEL 3
       
    58 #define SPRITE_ANGLE_MASK 0x01FF
       
    59 
       
    60 void
       
    61 NDS_OAM_Update(tOAM *oam)
       
    62 {
       
    63     DC_FlushAll();
       
    64     dmaCopyHalfWords(SPRITE_DMA_CHANNEL, oam->spriteBuffer, OAM,
       
    65                      SPRITE_COUNT * sizeof(SpriteEntry));
       
    66 }
       
    67 
       
    68 void
       
    69 NDS_OAM_RotateSprite(SpriteRotation *spriteRotation, u16 angle)
       
    70 {
       
    71     s16 s = SIN[angle & SPRITE_ANGLE_MASK] >> 4;
       
    72     s16 c = COS[angle & SPRITE_ANGLE_MASK] >> 4;
       
    73 
       
    74     spriteRotation->hdx = c;
       
    75     spriteRotation->hdy = s;
       
    76     spriteRotation->vdx = -s;
       
    77     spriteRotation->vdy = c;
       
    78 }
       
    79 
       
    80 void
       
    81 NDS_OAM_Init(tOAM *oam)
       
    82 {
       
    83     int i;
       
    84     for(i = 0; i < SPRITE_COUNT; i++) {
       
    85         oam->spriteBuffer[i].attribute[0] = ATTR0_DISABLED;
       
    86         oam->spriteBuffer[i].attribute[1] = 0;
       
    87         oam->spriteBuffer[i].attribute[2] = 0;
       
    88     }
       
    89     for(i = 0; i < MATRIX_COUNT; i++) {
       
    90         NDS_OAM_RotateSprite(&(oam->matrixBuffer[i]), 0);
       
    91     }
       
    92     swiWaitForVBlank();
       
    93     NDS_OAM_Update(oam);
       
    94 }
       
    95 
       
    96 void
       
    97 NDS_OAM_HideSprite(SpriteEntry *spriteEntry)
       
    98 {
       
    99     spriteEntry->isRotoscale = 0;
       
   100     spriteEntry->isHidden = 1;
       
   101 }
       
   102 
       
   103 void
       
   104 NDS_OAM_ShowSprite(SpriteEntry *spriteEntry, int affine, int double_bound)
       
   105 {
       
   106     if (affine) {
       
   107         spriteEntry->isRotoscale = 1;
       
   108         spriteEntry->rsDouble = double_bound;
       
   109     } else {
       
   110         spriteEntry->isHidden = 0;
       
   111     }
       
   112 }
       
   113 
       
   114 
       
   115 /* SDL NDS driver bootstrap functions */
    62 static int
   116 static int
    63 NDS_Available(void)
   117 NDS_Available(void)
    64 {
   118 {
    65     const char *envr = SDL_getenv("SDL_VIDEODRIVER");
   119     /*const char *envr = SDL_getenv("SDL_VIDEODRIVER");*/
    66     /*printf("NDS_Available()\n"); */
   120     /*printf("NDS_Available()\n"); */
    67     return (1);
   121     return (1);
    68 }
   122 }
    69 
   123 
    70 static void
   124 static void
    77 NDS_CreateDevice(int devindex)
   131 NDS_CreateDevice(int devindex)
    78 {
   132 {
    79     SDL_VideoDevice *device;
   133     SDL_VideoDevice *device;
    80     /*printf("NDS_CreateDevice(%d)\n", devindex); */
   134     /*printf("NDS_CreateDevice(%d)\n", devindex); */
    81 
   135 
       
   136 printf("+NDS_CreateDevice\n");
    82     /* Initialize all variables that we clean on shutdown */
   137     /* Initialize all variables that we clean on shutdown */
    83     device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
   138     device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
    84     if (!device) {
   139     if (!device) {
    85         SDL_OutOfMemory();
   140         SDL_OutOfMemory();
    86         if (device) {
   141         if (device) {
    97 
   152 
    98     device->num_displays = 2;   /* DS = dual screens */
   153     device->num_displays = 2;   /* DS = dual screens */
    99 
   154 
   100     device->free = NDS_DeleteDevice;
   155     device->free = NDS_DeleteDevice;
   101 
   156 
       
   157 printf("-NDS_CreateDevice\n");
   102     return device;
   158     return device;
   103 }
   159 }
   104 
   160 
   105 VideoBootStrap NDS_bootstrap = {
   161 VideoBootStrap NDS_bootstrap = {
   106     NDSVID_DRIVER_NAME, "SDL NDS video driver",
   162     NDSVID_DRIVER_NAME, "SDL NDS video driver",
   111 NDS_VideoInit(_THIS)
   167 NDS_VideoInit(_THIS)
   112 {
   168 {
   113     SDL_DisplayMode mode;
   169     SDL_DisplayMode mode;
   114     int i;
   170     int i;
   115 
   171 
   116     /* simple 256x192x15x60 for now */
   172 printf("+NDS_VideoInit\n");
       
   173     /* simple 256x192x16x60 for now */
   117     mode.w = 256;
   174     mode.w = 256;
   118     mode.h = 192;
   175     mode.h = 192;
   119     mode.format = SDL_PIXELFORMAT_ABGR1555;
   176     mode.format = SDL_PIXELFORMAT_ABGR1555;
   120     mode.refresh_rate = 60;
   177     mode.refresh_rate = 60;
   121     mode.driverdata = NULL;
   178     mode.driverdata = NULL;
   127 
   184 
   128     SDL_zero(mode);
   185     SDL_zero(mode);
   129     SDL_AddDisplayMode(0, &mode);
   186     SDL_AddDisplayMode(0, &mode);
   130 
   187 
   131     /* hackish stuff to get things up and running for now, and for a console */
   188     /* hackish stuff to get things up and running for now, and for a console */
   132     powerON(POWER_ALL);
   189     powerON(POWER_ALL_2D);
   133     irqInit();
   190     irqInit();
   134     irqEnable(IRQ_VBLANK);
   191     irqEnable(IRQ_VBLANK);
   135     NDS_SetDisplayMode(_this, &mode);
   192     NDS_SetDisplayMode(_this, &mode);
       
   193 printf("-NDS_VideoInit\n");
   136     return 0;
   194     return 0;
   137 }
   195 }
   138 
   196 
   139 static int
   197 static int
   140 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
   198 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
   141 {
   199 {
       
   200 printf("+NDS_SetDisplayMode\n");
   142     /* right now this function is just hard-coded for 256x192 ABGR1555 */
   201     /* right now this function is just hard-coded for 256x192 ABGR1555 */
   143     videoSetMode(MODE_5_2D | DISPLAY_BG3_ACTIVE);       /* display on main core */
   202     videoSetMode(MODE_5_2D | DISPLAY_BG3_ACTIVE);       /* display on main core */
   144     videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE);    /* debug text on sub */
   203     videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE);    /* debug text on sub */
   145     vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_LCD,
   204     vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_MAIN_BG_0x06020000,
   146                      VRAM_C_SUB_BG, VRAM_D_LCD);
   205                      VRAM_C_SUB_BG_0x06200000,  VRAM_C_SUB_BG_0x06220000);
   147 
   206     vramSetBankE(VRAM_E_MAIN_SPRITE);
   148     /* set up console for debug text 'n stuff */
   207     /* set up console for debug text 'n stuff */
   149     SUB_BG0_CR = BG_MAP_BASE(31);
   208     SUB_BG0_CR = BG_MAP_BASE(31);
   150     BG_PALETTE_SUB[255] = RGB15(31, 31, 31);
   209     BG_PALETTE_SUB[255] = RGB15(31, 31, 31);
       
   210    /* debugging purposes, uncomment this later.  then remove it & add 2screen.
   151     consoleInitDefault((u16 *) SCREEN_BASE_BLOCK_SUB(31),
   211     consoleInitDefault((u16 *) SCREEN_BASE_BLOCK_SUB(31),
   152                        (u16 *) CHAR_BASE_BLOCK_SUB(0), 16);
   212                        (u16 *) CHAR_BASE_BLOCK_SUB(0), 16);*/
   153 
   213 printf("-NDS_SetDisplayMode\n");
   154 #if 0
       
   155 /* we should be using this as a texture for rendering, not as a framebuffer */
       
   156     /* maps well to the 256x192 screen anyway.  note: need VRAM_B for bigger */
       
   157     BACKGROUND.control[3] = BG_BMP16_256x256;
       
   158     /* affine transformation matrix.  nothing too fancy here */
       
   159     BG3_XDX = 0x100;
       
   160     BG3_XDY = 0;
       
   161     BG3_YDX = 0;
       
   162     BG3_YDY = 0x100;
       
   163     /* x/y position */
       
   164     BG3_CX = 0;
       
   165     BG3_CY = 0;
       
   166 #endif
       
   167     return 0;
   214     return 0;
   168 }
   215 }
   169 
   216 
   170 void
   217 void
   171 NDS_VideoQuit(_THIS)
   218 NDS_VideoQuit(_THIS)
   172 {
   219 {
       
   220 printf("+NDS_VideoQuit\n");
   173     videoSetMode(DISPLAY_SCREEN_OFF);
   221     videoSetMode(DISPLAY_SCREEN_OFF);
   174     videoSetModeSub(DISPLAY_SCREEN_OFF);
   222     videoSetModeSub(DISPLAY_SCREEN_OFF);
   175     vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
   223     vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
       
   224 printf("-NDS_VideoQuit\n");
   176 }
   225 }
   177 
   226 
   178 /* vi: set ts=4 sw=4 expandtab: */
   227 /* vi: set ts=4 sw=4 expandtab: */