void SelectDisplayContext(int context_id)
{
// the CRTC is used to select which contex we see on our TV/VGA/HDTV
if(context_id==0)
GsSetCRTCSettings(CRTC_SETTINGS_DEFAULT1, 255);
if(context_id==1)
GsSetCRTCSettings(CRTC_SETTINGS_DEFAULT2, 255);
}
void GsResetGraph(short int mode, short int interlace, short int omode, short int ffmode)
{
GsGParam_t *pGParams;
switch(mode){
case GS_INIT_RESET:
GsDmaInit(); //It seems like the Sony developers reset the GIF DMA channel with their libdma library, but a lot of homebrew GS libraries will do this on their own.
pGParams=GsGetGParam();
GS_SET_CSR_reset(1);
pGParams->ffmode=ffmode;
pGParams->interlace=interlace;
pGParams->omode=omode;
pGParams->version=GS_GET_CSR_gs_rev_number>>16;
GsPutIMR(0xFF00);
SetGsCrt(interlace&1, omode&0xFF, ffmode&1);
GsSetCRTCSettings(CRTC_SETTINGS_DEFAULT1, 0x80);
break;
case GS_INIT_DRAW_RESET:
GS_SET_CSR_flush(1);
break;
/* There is a mode 5 present in the Sony sceGsResetGraph, but is not documented. It seems to change the video mode without resetting anything. */
}
}
int InitGraphics()
{
GsInit();
GsSetVideoMode(1, 2, 0);
GsSetCRTCSettings(CRTC_SETTINGS_DEFAULT1, 255); //display context 1 on tv
GsSetDefaultDrawEnv(&draw_env, SCREEN_OFFSET_X, SCREEN_OFFSET_Y, SCREEN_WIDTH, SCREEN_HEIGHT);
GsSetDefaultDrawEnvAddress(&draw_env, 0, SCREEN_WIDTH/64, GS_PIXMODE_32);
GsSetDefaultDisplayEnv(&disp_env, 656, 36+(36/2), SCREEN_WIDTH, SCREEN_HEIGHT);
GsSetDefaultDisplayEnvAddress(&disp_env, 0, SCREEN_WIDTH/64, GS_PIXMODE_32);
//execute draw/display environment(s) (context 1)
GsPutDrawEnv1(&draw_env);
GsPutDisplayEnv1(&disp_env);
//set some common stuff
GsOverridePrimAttributes(GS_DISABLE, 0, 0, 0, 0, 0, 0, 0, 0);
// contex 1
GsEnableAlphaTransparency1(GS_ENABLE, GS_ALPHA_GEQUAL, 0x01, 0x00);
// contex 2
GsEnableAlphaTransparency2(GS_ENABLE, GS_ALPHA_GEQUAL, 0x01, 0x00);
GsEnableAlphaBlending1(GS_ENABLE, 0);
GsEnableAlphaBlending2(GS_ENABLE, 0);
return 0;
}
int InitGraphics()
{
static int env0_address;
static int env1_address;
GsInit();
GsSetVideoMode(1, 2, 0);
GsSetCRTCSettings(CRTC_SETTINGS_DEFAULT1, 255); //display contex 1
//alloc 2 buffers in vram
env0_address = GsVramAllocFrameBuffer(SCREEN_WIDTH, SCREEN_HEIGHT, GS_PIXMODE_32);
env1_address = GsVramAllocFrameBuffer(SCREEN_WIDTH, SCREEN_HEIGHT, GS_PIXMODE_32);
/*********SETUP CONTEX 1 ENVIRONMENT*************/
GsSetDefaultDrawEnv (&draw_env[0], SCREEN_OFFSET_X, SCREEN_OFFSET_Y, SCREEN_WIDTH, SCREEN_HEIGHT);
GsSetDefaultDrawEnvAddress(&draw_env[0], env0_address, SCREEN_WIDTH/64, GS_PIXMODE_32);
GsSetDefaultDisplayEnv (&disp_env[0], 656, 36+(36/2), SCREEN_WIDTH, SCREEN_HEIGHT);
GsSetDefaultDisplayEnvAddress(&disp_env[0], env1_address, SCREEN_WIDTH/64, GS_PIXMODE_32);
/*********SETUP CONTEX 2 ENVIRONMENT*************/
GsSetDefaultDrawEnv (&draw_env[1], SCREEN_OFFSET_X, SCREEN_OFFSET_Y, SCREEN_WIDTH, SCREEN_HEIGHT);
GsSetDefaultDrawEnvAddress(&draw_env[1], env1_address, SCREEN_WIDTH/64, GS_PIXMODE_32);
GsSetDefaultDisplayEnv (&disp_env[1], 656, 36+(36/2), SCREEN_WIDTH, SCREEN_HEIGHT);
GsSetDefaultDisplayEnvAddress(&disp_env[1], env0_address, SCREEN_WIDTH/64, GS_PIXMODE_32);
//execute draw/display environment(s) (contex 1)
GsPutDrawEnv1 (&draw_env[0]);
GsPutDisplayEnv1(&disp_env[0]);
//execute draw/display environment(s) (contex 2)
GsPutDrawEnv2 (&draw_env[1]);
GsPutDisplayEnv2(&disp_env[1]);
//set some common stuff
GsOverridePrimAttributes(GS_DISABLE, 0, 0, 0, 0, 0, 0, 0, 0);
// contex 1
GsEnableAlphaTransparency1(GS_ENABLE, GS_ALPHA_GEQUAL, 0x01, 0x00);
// contex 2
GsEnableAlphaTransparency2(GS_ENABLE, GS_ALPHA_GEQUAL, 0x01, 0x00);
GsEnableAlphaBlending1(GS_ENABLE, 0);
GsEnableAlphaBlending2(GS_ENABLE, 0);
return 0;
}
