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SDL_ndsvideo.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 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"
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/* SDL Nintendo DS video driver implementation
* based on dummy driver:
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* Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
* of this was cut-and-pasted from Stephane Peter's work in the AAlib
* SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
*/
#include <stdio.h>
#include <stdlib.h>
#include <nds.h>
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#include <nds/arm9/video.h>
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#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_ndsrender_c.h"
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#define TRACE
//#define TRACE printf
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#define NDSVID_DRIVER_NAME "nds"
/* Initialization/Query functions */
static int NDS_VideoInit(_THIS);
static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
static void NDS_VideoQuit(_THIS);
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/* SDL NDS driver bootstrap functions */
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static int
NDS_Available(void)
{
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/*const char *envr = SDL_getenv("SDL_VIDEODRIVER");*/
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/*printf("NDS_Available()\n"); */
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return (1);
}
static void
NDS_DeleteDevice(SDL_VideoDevice * device)
{
SDL_free(device);
}
static SDL_VideoDevice *
NDS_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
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/*printf("NDS_CreateDevice(%d)\n", devindex); */
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TRACE("+NDS_CreateDevice\n");
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/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
if (!device) {
SDL_OutOfMemory();
if (device) {
SDL_free(device);
}
return (0);
}
/* Set the function pointers */
device->VideoInit = NDS_VideoInit;
device->VideoQuit = NDS_VideoQuit;
device->SetDisplayMode = NDS_SetDisplayMode;
device->PumpEvents = NDS_PumpEvents;
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device->num_displays = 2; /* DS = dual screens */
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device->free = NDS_DeleteDevice;
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TRACE("-NDS_CreateDevice\n");
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return device;
}
VideoBootStrap NDS_bootstrap = {
NDSVID_DRIVER_NAME, "SDL NDS video driver",
NDS_Available, NDS_CreateDevice
};
int
NDS_VideoInit(_THIS)
{
SDL_DisplayMode mode;
int i;
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TRACE("+NDS_VideoInit\n");
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/* simple 256x192x16x60 for now */
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mode.w = 256;
mode.h = 192;
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mode.format = SDL_PIXELFORMAT_ABGR1555;
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mode.refresh_rate = 60;
mode.driverdata = NULL;
SDL_AddBasicVideoDisplay(&mode);
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SDL_AddRenderDriver(0, &NDS_RenderDriver);
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/*SDL_AddBasicVideoDisplay(&mode); two screens, same mode. uncomment later
SDL_AddRenderDriver(1, &NDS_RenderDriver);*/
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SDL_zero(mode);
SDL_AddDisplayMode(0, &mode);
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/* hackish stuff to get things up and running for now, and for a console */
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powerON(POWER_ALL_2D); irqInit();
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irqEnable(IRQ_VBLANK);
NDS_SetDisplayMode(_this, &mode);
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TRACE("-NDS_VideoInit\n");
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return 0;
}
static int
NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
{
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TRACE("+NDS_SetDisplayMode\n");
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/* right now this function is just hard-coded for 256x192 ABGR1555 */
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videoSetMode(MODE_5_2D |
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DISPLAY_BG2_ACTIVE |
DISPLAY_BG3_ACTIVE |
DISPLAY_BG_EXT_PALETTE |
DISPLAY_SPR_1D_LAYOUT |
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DISPLAY_SPR_1D_BMP |
DISPLAY_SPR_1D_BMP_SIZE_256 | /* try 128 if 256 is trouble. */
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DISPLAY_SPR_ACTIVE |
DISPLAY_SPR_EXT_PALETTE); /* display on main core
with lots of flags set for
flexibility/capacity to render */
/* hopefully these cover all the various things we might need to do */
vramSetBankA(VRAM_A_MAIN_BG_0x06000000);
vramSetBankB(VRAM_B_MAIN_BG_0x06020000);
vramSetBankC(VRAM_C_SUB_BG_0x06200000);
vramSetBankD(VRAM_D_MAIN_BG_0x06040000); /* not a typo. vram d can't sub */
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vramSetBankE(VRAM_E_MAIN_SPRITE);
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vramSetBankF(VRAM_F_OBJ_EXT_PALETTE);
vramSetBankG(VRAM_G_BG_EXT_PALETTE);
vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
vramSetBankI(VRAM_I_SUB_SPRITE);
videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub
TODO: this will change
when multi-head is
introduced in render */
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TRACE("-NDS_SetDisplayMode\n");
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return 0;
}
void
NDS_VideoQuit(_THIS)
{
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TRACE("+NDS_VideoQuit\n");
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videoSetMode(DISPLAY_SCREEN_OFF);
videoSetModeSub(DISPLAY_SCREEN_OFF);
vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
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vramSetBankE(VRAM_E_LCD);
vramSetBankF(VRAM_F_LCD);
vramSetBankG(VRAM_G_LCD);
vramSetBankH(VRAM_H_LCD);
vramSetBankI(VRAM_I_LCD);
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TRACE("-NDS_VideoQuit\n");
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}
/* vi: set ts=4 sw=4 expandtab: */