/*

SDL - Simple DirectMedia Layer

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"

/* SDL Nintendo DS video driver implementation

* based on dummy driver:

* 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>

#include <nds/arm9/video.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_ndsrender_c.h"

#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);

/* SDL NDS driver bootstrap functions */

static int

NDS_Available(void)

{

return (1); /* always here */

}

static void

NDS_DeleteDevice(SDL_VideoDevice * device)

{

SDL_free(device);

}

static SDL_VideoDevice *

NDS_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

/* 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;

device->num_displays = 2; /* DS = dual screens */

device->free = NDS_DeleteDevice;

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;

/* simple 256x192x16x60 for now */

mode.w = 256;

mode.h = 192;

mode.format = SDL_PIXELFORMAT_ABGR1555;

mode.refresh_rate = 60;

mode.driverdata = NULL;

if (SDL_AddBasicVideoDisplay(&mode) < 0) {

return -1;

}

SDL_AddRenderDriver(&_this->displays[0], &NDS_RenderDriver);

SDL_zero(mode);

SDL_AddDisplayMode(0, &mode);

powerON(POWER_ALL_2D);

irqInit();

irqEnable(IRQ_VBLANK);

NDS_SetDisplayMode(_this, &mode);

return 0;

}

static int

NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)

{

/* right now this function is just hard-coded for 256x192 ABGR1555 */

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.) */

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 */

vramSetBankE(VRAM_E_MAIN_SPRITE);

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 */

return 0;

}

void

NDS_VideoQuit(_THIS)

{

videoSetMode(DISPLAY_SCREEN_OFF);

videoSetModeSub(DISPLAY_SCREEN_OFF);

vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);

vramSetBankE(VRAM_E_LCD);

vramSetBankF(VRAM_F_LCD);

vramSetBankG(VRAM_G_LCD);

vramSetBankH(VRAM_H_LCD);

vramSetBankI(VRAM_I_LCD);

}

/* vi: set ts=4 sw=4 expandtab: */