C++ (Cpp) RISCOS_InitTask Examples

Example #1

File: SDL_riscosvideo.c Project: Sgt-Nukem/chocolate_duke3D

int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
	_kernel_swi_regs regs;

	if (RISCOS_InitTask() == 0)
	{
		SDL_SetError("Unable to start task");
		return 0;
	}

	regs.r[0] = -1; /* Current mode */
	regs.r[1] = 9;  /* Log base 2 bpp */

	_kernel_swi(OS_ReadModeVariable, &regs, &regs);
	vformat->BitsPerPixel = (1 << regs.r[2]);

	/* Minimum bpp for SDL is 8 */
	if (vformat->BitsPerPixel < 8) vformat->BitsPerPixel = 8;


	switch (vformat->BitsPerPixel)
	{
		case 15:
		case 16:
			vformat->Bmask = 0x00007c00;
			vformat->Gmask = 0x000003e0;
			vformat->Rmask = 0x0000001f;
			vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */
			vformat->BytesPerPixel = 2;
			break;

		case 24:
		case 32:
			vformat->Bmask = 0x00ff0000;
			vformat->Gmask = 0x0000ff00;
			vformat->Rmask = 0x000000ff;
			vformat->BytesPerPixel = 4;
			break;

		default:
			vformat->Bmask = 0;
			vformat->Gmask = 0;
			vformat->Rmask = 0;
			vformat->BytesPerPixel = 1;			
			break;
	}

	/* Fill in some window manager capabilities */
	this->info.wm_available = 1;

	/* We're done! */
	return(0);
}

Example #2

File: SDL_riscosvideo.c Project: cuttl/wii2600

int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
	_kernel_swi_regs regs;
	int vars[4], vals[3];

	if (RISCOS_InitTask() == 0)
	{
		SDL_SetError("Unable to start task");
		return 0;
	}

	vars[0] = 9;  /* Log base 2 bpp */
	vars[1] = 11; /* XWndLimit - num x pixels -1 */
	vars[2] = 12; /* YWndLimit - num y pixels -1 */
	vars[3] = -1; /* Terminate list */
	regs.r[0] = (int)vars;
	regs.r[1] = (int)vals;

	_kernel_swi(OS_ReadVduVariables, &regs, &regs);
	vformat->BitsPerPixel = (1 << vals[0]);

	/* Determine the current screen size */
	this->info.current_w = vals[1] + 1;
	this->info.current_h = vals[2] + 1;

	/* Minimum bpp for SDL is 8 */
	if (vformat->BitsPerPixel < 8) vformat->BitsPerPixel = 8;


	switch (vformat->BitsPerPixel)
	{
		case 15:
		case 16:
			vformat->Bmask = 0x00007c00;
			vformat->Gmask = 0x000003e0;
			vformat->Rmask = 0x0000001f;
			vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */
			vformat->BytesPerPixel = 2;
			break;

		case 24:
		case 32:
			vformat->Bmask = 0x00ff0000;
			vformat->Gmask = 0x0000ff00;
			vformat->Rmask = 0x000000ff;
			vformat->BytesPerPixel = 4;
			break;

		default:
			vformat->Bmask = 0;
			vformat->Gmask = 0;
			vformat->Rmask = 0;
			vformat->BytesPerPixel = 1;			
			break;
	}

	/* Fill in some window manager capabilities */
	this->info.wm_available = 1;

	/* We're done! */
	return(0);
}