| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| #include <nds.h> |
| #include <nds/registers_alt.h> |
| #include "SDL.h" |
| #include "SDL_error.h" |
| #include "SDL_video.h" |
| #include "SDL_mouse.h" |
| #include "../SDL_sysvideo.h" |
| #include "../SDL_pixels_c.h" |
| #include "../../events/SDL_events_c.h" |
| |
| #include "SDL_ndsvideo.h" |
| #include "SDL_ndsevents_c.h" |
| #include "SDL_ndsmouse_c.h" |
| |
| #define NDSVID_DRIVER_NAME "nds" |
| |
| /* Initialization/Query functions */ |
| static int NDS_VideoInit(_THIS, SDL_PixelFormat *vformat); |
| static SDL_Rect **NDS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
| static SDL_Surface *NDS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
| static int NDS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors); |
| static void NDS_VideoQuit(_THIS); |
| |
| /* Hardware surface functions */ |
| static int NDS_AllocHWSurface(_THIS, SDL_Surface *surface); |
| static int NDS_LockHWSurface(_THIS, SDL_Surface *surface); |
| static int NDS_FlipHWSurface(_THIS, SDL_Surface *surface); |
| static void NDS_UnlockHWSurface(_THIS, SDL_Surface *surface); |
| static void NDS_FreeHWSurface(_THIS, SDL_Surface *surface); |
| |
| /* etc. */ |
| static void NDS_UpdateRects(_THIS, int numrects, SDL_Rect *rects); |
| |
| /* NDS driver bootstrap functions */ |
| |
| static int NDS_Available(void) |
| { |
| return(1); |
| } |
| |
| static void NDS_DeleteDevice(SDL_VideoDevice *device) |
| { |
| SDL_free(device->hidden); |
| SDL_free(device); |
| } |
| |
| void on_irq_vblank() |
| { |
| // Disable interrupts |
| //REG_IME = 0; |
| scanKeys(); |
| |
| // VBLANK_INTR_WAIT_FLAGS |= IRQ_VBLANK; |
| // REG_IF |= IRQ_VBLANK; |
| //REG_IF = REG_IF; |
| |
| // Enable interrupts |
| //REG_IME = 1; |
| } |
| |
| static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, |
| SDL_Surface *dst, SDL_Rect *dstrect) |
| { |
| return 0; |
| } |
| |
| static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) |
| { |
| if (src->flags & SDL_SRCALPHA) return false; |
| if (src->flags & SDL_SRCCOLORKEY) return false; |
| if (src->flags & SDL_HWPALETTE ) return false; |
| if (dst->flags & SDL_SRCALPHA) return false; |
| if (dst->flags & SDL_SRCCOLORKEY) return false; |
| if (dst->flags & SDL_HWPALETTE ) return false; |
| |
| if (src->format->BitsPerPixel != dst->format->BitsPerPixel) return false; |
| if (src->format->BytesPerPixel != dst->format->BytesPerPixel) return false; |
| |
| src->map->hw_blit = HWAccelBlit; |
| return true; |
| } |
| |
| static SDL_VideoDevice *NDS_CreateDevice(int devindex) |
| { |
| SDL_VideoDevice *device=0; |
| |
| |
| /* Initialize all variables that we clean on shutdown */ |
| device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| if ( device ) { |
| SDL_memset(device, 0, (sizeof *device)); |
| device->hidden = (struct SDL_PrivateVideoData *) |
| SDL_malloc((sizeof *device->hidden)); |
| } |
| if ( (device == NULL) || (device->hidden == NULL) ) { |
| SDL_OutOfMemory(); |
| if ( device ) { |
| SDL_free(device); |
| } |
| return(0); |
| } |
| SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| |
| /* Set the function pointers */ |
| device->VideoInit = NDS_VideoInit; |
| device->ListModes = NDS_ListModes; |
| device->SetVideoMode = NDS_SetVideoMode; |
| device->CreateYUVOverlay = NULL; |
| device->SetColors = NDS_SetColors; |
| device->UpdateRects = NDS_UpdateRects; |
| device->VideoQuit = NDS_VideoQuit; |
| device->AllocHWSurface = NDS_AllocHWSurface; |
| device->CheckHWBlit = CheckHWBlit; |
| device->FillHWRect = NULL; |
| device->SetHWColorKey = NULL; |
| device->SetHWAlpha = NULL; |
| device->LockHWSurface = NDS_LockHWSurface; |
| device->UnlockHWSurface = NDS_UnlockHWSurface; |
| device->FlipHWSurface = NDS_FlipHWSurface; |
| device->FreeHWSurface = NDS_FreeHWSurface; |
| device->SetCaption = NULL; |
| device->SetIcon = NULL; |
| device->IconifyWindow = NULL; |
| device->GrabInput = NULL; |
| device->GetWMInfo = NULL; |
| device->InitOSKeymap = NDS_InitOSKeymap; |
| device->PumpEvents = NDS_PumpEvents; |
| device->info.blit_hw=1; |
| |
| device->free = NDS_DeleteDevice; |
| return device; |
| } |
| |
| VideoBootStrap NDS_bootstrap = { |
| NDSVID_DRIVER_NAME, "SDL NDS video driver", |
| NDS_Available, NDS_CreateDevice |
| }; |
| |
| u16* frontBuffer;// = (u16*)(0x06000000); |
| u16* backBuffer;// = (u16*)(0x06000000 + 256 * 256 * 2); |
| int NDS_VideoInit(_THIS, SDL_PixelFormat *vformat) |
| { |
| //printf("WARNING: You are using the SDL NDS video driver!\n"); |
| |
| /* Determine the screen depth (use default 8-bit depth) */ |
| /* we change this during the SDL_SetVideoMode implementation... */ |
| vformat->BitsPerPixel = 16; // mode 3 |
| vformat->BytesPerPixel = 2; |
| vformat->Rmask = 0x0000f800; |
| vformat->Gmask = 0x000007e0; |
| vformat->Bmask = 0x0000001f; |
| powerON(POWER_ALL); |
| irqInit(); |
| irqSet(IRQ_VBLANK, on_irq_vblank); |
| irqEnable(IRQ_VBLANK); |
| |
| //set the mode for 2 text layers and two extended background layers |
| //videoSetMode(MODE_5_2D | DISPLAY_BG3_ACTIVE); |
| videoSetMode(MODE_6_2D| DISPLAY_BG2_ACTIVE); |
| |
| //set the sub background up for text display (we could just print to one |
| //of the main display text backgrounds just as easily |
| videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); //sub bg 0 will be used to print text |
| |
| //set the first two banks as background memory and the third as sub background memory |
| //D is not used..if you need a bigger background then you will need to map |
| //more vram banks consecutivly (VRAM A-D are all 0x20000 bytes in size) |
| //vramSetMainBanks(VRAM_A_MAIN_BG_0x6000000, VRAM_B_MAIN_BG_0x6020000,VRAM_C_SUB_BG , VRAM_D_LCD); |
| vramSetMainBanks(VRAM_A_MAIN_BG,VRAM_B_MAIN_BG,VRAM_C_MAIN_BG,VRAM_D_MAIN_BG); |
| //vramSetBankA(VRAM_A_MAIN_BG); |
| //vramSetBankB(VRAM_B_MAIN_BG); |
| //vramSetBankC(VRAM_C_MAIN_BG); |
| //vramSetBankD(VRAM_D_MAIN_BG); |
| //vramSetBankE(VRAM_E_MAIN_BG); |
| //vramSetBankF(VRAM_F_MAIN_BG); |
| //vramSetBankG(VRAM_G_MAIN_BG); |
| vramSetBankH(VRAM_H_SUB_BG); |
| vramSetBankI(VRAM_I_LCD); |
| |
| ////////////////set up text background for text///////////////////// |
| SUB_BG0_CR = BG_MAP_BASE(8); |
| |
| BG_PALETTE_SUB[255] = RGB15(31,31,31);//by default font will be rendered with color 255 |
| ///////////////set up our bitmap background/////////////////////// |
| |
| //BG3_CR = BG_BMP16_512x512; |
| |
| //these are rotation backgrounds so you must set the rotation attributes: |
| //these are fixed point numbers with the low 8 bits the fractional part |
| //this basicaly gives it a 1:1 translation in x and y so you get a nice flat bitmap |
| /* BG3_XDX = 1<<8; |
| BG3_XDY = 0; |
| BG3_YDX = 0; |
| BG3_YDY = 1<<8; |
| //our bitmap looks a bit better if we center it so scroll down (256 - 192) / 2 |
| BG3_CX = 0; |
| BG3_CY = 0; |
| */ |
| //consoleInit() is a lot more flexible but this gets you up and running quick |
| consoleInitDefault((u16*)SCREEN_BASE_BLOCK_SUB(8), (u16*)CHAR_BASE_BLOCK_SUB(0), 16); |
| |
| |
| frontBuffer =(u16*)(0x06000000); |
| //backBuffer =(u16*)(0x06000000 + 1024 * 512*2); |
| |
| //lcdSwap(); |
| /* We're done! */ |
| return(0); |
| } |
| |
| SDL_Rect **NDS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
| { |
| return (SDL_Rect **) -1; |
| } |
| |
| SDL_Surface *NDS_SetVideoMode(_THIS, SDL_Surface *current, |
| int width, int height, int bpp, Uint32 flags) |
| { |
| Uint32 Rmask, Gmask, Bmask, Amask; |
| |
| //if(width > 1024 || height > 512 || bpp > 16) |
| // return(NULL); |
| |
| if(bpp >8) { |
| bpp=16; |
| Rmask = 0x0000001F; |
| Gmask = 0x000003E0; |
| Bmask = 0x00007C00; |
| Amask = 0x00008000; |
| |
| videoSetMode(MODE_5_2D| DISPLAY_BG2_ACTIVE); |
| |
| vramSetMainBanks(VRAM_A_MAIN_BG,VRAM_B_MAIN_BG,VRAM_C_MAIN_BG,VRAM_D_MAIN_BG); |
| |
| BG2_CR = BG_BMP16_512x512; |
| BG2_XDX = ((width / 256) << 8) | (width % 256) ; |
| BG2_XDY = 0; |
| BG2_YDX = 0; |
| BG2_YDY = ((height / 192) << 8) | ((height % 192) + (height % 192) / 3) ; |
| BG2_CX = 0; |
| BG2_CY = 0; |
| // for (i=0;i<256*192;i++) |
| // frontBuffer[i] = RGB15(31,0,0)|BIT(15); |
| } |
| else |
| if(bpp <= 8) { |
| bpp=8; |
| Rmask = 0x00000000; |
| Gmask = 0x00000000; |
| Bmask = 0x00000000; |
| BG2_CR = BG_BMP8_1024x512; |
| BG2_XDX = ((width / 256) << 8) | (width % 256) ; |
| BG2_XDY = 0; |
| BG2_YDX = 0; |
| BG2_YDY = ((height / 192) << 8) | ((height % 192) + (height % 192) / 3) ; |
| |
| } |
| else |
| if(bpp < 15) bpp=15; |
| if(width<=256) width=256; |
| else |
| if(width<256) width=256; |
| if(height<=192) height=192; |
| else |
| if(height<192) height=192; |
| |
| if(bpp==8) |
| { |
| if(width<256) width=256; |
| if(height<192) height=192; |
| this->hidden->ndsmode=4; |
| } |
| |
| if(bpp==15) |
| { |
| if(width<256) this->hidden->ndsmode=5; |
| else this->hidden->ndsmode=3; |
| } |
| |
| this->hidden->buffer= frontBuffer;//NDS_VRAM_BASE; |
| |
| //NDS_DISPCNT = NDS_DISP_MODE(this->hidden->ndsmode)|NDS_DISP_BG2; |
| |
| //fprintf(stderr,"Setting mode %dx%d (ndsmode %d)\n", width, height,this->hidden->ndsmode); |
| |
| // FIXME: How do I tell that 15 bits mode is 555? |
| |
| SDL_memset(this->hidden->buffer, 0, 1024 * 512* ((this->hidden->ndsmode==4 || this->hidden->ndsmode==5) ? 2 : 1 ) * ((bpp+7) / 8)); |
| |
| /* Allocate the new pixel format for the screen */ |
| if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, Amask) ) { |
| this->hidden->buffer = NULL; |
| SDL_SetError("Couldn't allocate new pixel format for requested mode"); |
| return(NULL); |
| } |
| |
| /* Set up the new mode framebuffer */ |
| current->flags = flags | SDL_FULLSCREEN | SDL_HWSURFACE | (this->hidden->ndsmode > 0 ? SDL_DOUBLEBUF : 0); |
| this->hidden->w = current->w = width; |
| this->hidden->h = current->h = height; |
| current->pixels = frontBuffer; |
| |
| if (flags & SDL_DOUBLEBUF) { |
| this->hidden->secondbufferallocd=1; |
| backBuffer=(u16*)SDL_malloc(1024*512*2); |
| current->pixels = backBuffer; |
| } |
| if(bpp==8) |
| current->pitch =1024; |
| else |
| current->pitch =512*2; |
| |
| /* We're done */ |
| return(current); |
| } |
| |
| static int NDS_AllocHWSurface(_THIS, SDL_Surface *surface) |
| { |
| if(this->hidden->secondbufferallocd) { |
| //printf("double double buffer alloc\n"); |
| return -1; |
| } |
| //if(this->hidden->ndsmode==3) |
| //{ |
| // printf("no 2nd buffer in mode3\n"); |
| // return -1; |
| //} |
| //printf("second buffer\n"); |
| //this->hidden->secondbufferallocd=1; |
| //backBuffer=(u16*)malloc(1024*512*2); |
| //surface->pixels = backBuffer; |
| |
| return(0); |
| } |
| static void NDS_FreeHWSurface(_THIS, SDL_Surface *surface) |
| { |
| //free(backBuffer); |
| this->hidden->secondbufferallocd=0; |
| } |
| int z=0; |
| /* We need to wait for vertical retrace on page flipped displays */ |
| static int NDS_LockHWSurface(_THIS, SDL_Surface *surface) |
| { |
| /* |
| uint8* a = surface->pixels; |
| int i,j; |
| a += 5 * SCREEN_WIDTH + 5; |
| for( i = 0; i < 195; ++i) { |
| uint16* line = a + (SCREEN_WIDTH * i); |
| for( j = 0; j < 158; ++j) { |
| *line++ = RGB15(155,155,25); |
| } |
| } |
| */ |
| //if (z <256) |
| // BG_PALETTE[z++]=RGB15(255-z,z,255-z); |
| |
| |
| return(0); |
| } |
| |
| static void NDS_UnlockHWSurface(_THIS, SDL_Surface *surface) |
| { |
| return; |
| } |
| |
| static int NDS_FlipHWSurface(_THIS, SDL_Surface *surface) |
| { |
| if(this->hidden->secondbufferallocd){ |
| while(DISP_Y!=192); |
| while(DISP_Y==192); |
| //printf("flip"); |
| |
| dmaCopyAsynch(backBuffer,frontBuffer,1024*512); |
| } |
| //printf("flip\n"); |
| //u16* temp = surface->pixels; |
| //surface->pixels = frontBuffer; |
| //frontBuffer = temp; |
| /* u8* vram=BG_GFX; |
| int x,y; |
| for(y = 0; y < 512; y++) |
| dmaCopy(&frontBuffer[y*rects->w], &vram[y*512],512); |
| //unsigned char buf; |
| |
| //printf("NDS_FlipHWSurface\n"); |
| //printf("ptr now: 0x%x\n",surface->pixels); |
| |
| while(DISP_Y!=192); |
| while(DISP_Y==192); |
| //swap |
| u16* temp = frontBuffer; |
| frontBuffer = backBuffer; |
| backBuffer = temp; |
| |
| //flip |
| //base is 16KB and screen size is 256x256x2 (128KB) |
| BG2_CR ^= BG_BMP_BASE( 512 / 16 ); */ |
| /* |
| if(surface->pixels == frontBuffer)//NDS_VRAM_BASE) |
| { |
| while(DISP_Y!=192); |
| while(DISP_Y==192); |
| //swap |
| u16* temp = backBuffer; |
| backBuffer = frontBuffer; |
| frontBuffer = temp; |
| |
| //flip |
| //base is 16KB and screen size is 256x256x2 (128KB) |
| BG3_CR ^= BG_BMP_BASE( 128 / 16 ); |
| } |
| else |
| { |
| |
| while(DISP_Y!=192); |
| while(DISP_Y==192); |
| //swap |
| u16* temp = frontBuffer; |
| frontBuffer = backBuffer; |
| backBuffer = temp; |
| |
| //flip |
| //base is 16KB and screen size is 256x256x2 (128KB) |
| BG3_CR ^= BG_BMP_BASE( 128 / 16 ); |
| |
| } |
| */ |
| //printf("ptr then: 0x%x\n",surface->pixels); |
| |
| //printf("setting dispcnt to 0x%x\n",NDS_DISPCNT = NDS_DISP_MODE(this->hidden->ndsmode)|NDS_DISP_BG2| buf); |
| return(0); |
| } |
| |
| static void NDS_UpdateRects(_THIS, int numrects, SDL_Rect *rects) |
| { |
| //fprintf(stderr,"update\n"); |
| /* do nothing. */ |
| //dmaCopy(frontBuffer,BG_GFX,512*512); |
| /* |
| u8* vram=(u8*)BG_GFX; |
| int x,y; |
| for(y = 0; y < 512; y++) |
| dmaCopy(&frontBuffer[y*rects->w], &vram[y*512],512); |
| */ |
| |
| } |
| |
| int NDS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
| { |
| //printf("SetColors\n"); |
| short r,g,b; |
| |
| if(this->hidden->ndsmode != 4) |
| { |
| printf("This is not a palettized mode\n"); |
| return -1; |
| } |
| |
| int i,j=firstcolor+ncolors; |
| for(i=firstcolor;i<j;i++) |
| { |
| r=colors[i].r>>3; |
| g=colors[i].g>>3; |
| b=colors[i].b>>3; |
| BG_PALETTE[i]=RGB15(r, g, b); |
| } |
| |
| return(0); |
| } |
| |
| /* Note: If we are terminated, this could be called in the middle of |
| another SDL video routine -- notably UpdateRects. |
| */ |
| void NDS_VideoQuit(_THIS) |
| { |
| } |