view src/video/maccommon/SDL_macgl.c @ 1768:814f9f2c7a33

Fixed bug #80 Date: 21 Apr 2003 17:20:20 +0100 From: Alan Swanson <swanson@uklinux.net> Subject: [SDL] New XFree 4.3 Video Mode Patch If you look at the unsorted list of modes returned by X, here's mine; 1280 x 1024 @ 85.0 > 1024 x 768 @ 100.3 > USER 800 x 600 @ 125.5 > SET 640 x 480 @ 124.9 > 1280 x 1024 @ 75.0 ] 1280 x 1024 @ 60.0 ] 1280 x 960 @ 85.0 ] X11 1280 x 960 @ 60.0 ] AUTO 1152 x 864 @ 75.0 ]=20 1152 x 768 @ 54.8 ] 960 x 720 @ 120.0 ] ... 640 x 400 @ 85.1 ] 256k 576 x 432 @ 150.0 ] 249k PIXEL 640 x 350 @ 85.1 ] 224k COUNT 576 x 384 @ 109.6 ] 221k ... The user set modes come first followed by X set modes which are ordered by decreasing number of pixels and refresh. The reason why every other library or program not using SDL working is due to SDL scanning the modes in reverse getting X11 provided modes modes with the lowest refresh.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 05 May 2006 05:50:26 +0000
parents eacc5bc01d1c
children 14717b52abc0
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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"

/* AGL implementation of SDL OpenGL support */

#include "SDL_lowvideo.h"
#include "SDL_macgl_c.h"
#include "SDL_loadso.h"


/* krat: adding OpenGL support */
int Mac_GL_Init(_THIS)
{
#if SDL_VIDEO_OPENGL
	AGLPixelFormat format;
   	int i = 0;
	GLint attributes [ 26 ]; /* 26 is max possible in this setup */
	GLboolean noerr;
   
	/* load the gl driver from a default path */
	if ( ! this->gl_config.driver_loaded ) {
		/* no driver has been loaded, use default (ourselves) */
		if ( Mac_GL_LoadLibrary(this, NULL) < 0 ) {
			return(-1);
		}
	}

	attributes[i++] = AGL_RGBA;
	if ( this->gl_config.red_size   != 0 &&
	     this->gl_config.blue_size  != 0 &&
	     this->gl_config.green_size != 0 ) {
		attributes[i++] = AGL_RED_SIZE;
		attributes[i++] = this->gl_config.red_size;
		attributes[i++] = AGL_GREEN_SIZE;
		attributes[i++] = this->gl_config.green_size;
		attributes[i++] = AGL_BLUE_SIZE;
		attributes[i++] = this->gl_config.blue_size;
		attributes[i++] = AGL_ALPHA_SIZE;
		attributes[i++] = this->gl_config.alpha_size;
	}
	if ( this->gl_config.double_buffer ) {
		attributes[i++] = AGL_DOUBLEBUFFER;
	}
	if ( this->gl_config.depth_size != 0 ) {
		attributes[i++] = AGL_DEPTH_SIZE;
		attributes[i++] = this->gl_config.depth_size;
	}	
	if ( this->gl_config.stencil_size != 0 ) {
		attributes[i++] = AGL_STENCIL_SIZE;
		attributes[i++] = this->gl_config.stencil_size;
	}
	if ( this->gl_config.accum_red_size   != 0 &&
	     this->gl_config.accum_blue_size  != 0 &&
	     this->gl_config.accum_green_size != 0 ) {
		
		attributes[i++] = AGL_ACCUM_RED_SIZE;
		attributes[i++] = this->gl_config.accum_red_size;
		attributes[i++] = AGL_ACCUM_GREEN_SIZE;
		attributes[i++] = this->gl_config.accum_green_size;
		attributes[i++] = AGL_ACCUM_BLUE_SIZE;
		attributes[i++] = this->gl_config.accum_blue_size;
		attributes[i++] = AGL_ACCUM_ALPHA_SIZE;
		attributes[i++] = this->gl_config.accum_alpha_size;
	}
	if ( this->gl_config.stereo ) {
		attributes[i++] = AGL_STEREO;
	}
#if defined(AGL_SAMPLE_BUFFERS_ARB) && defined(AGL_SAMPLES_ARB)
	if ( this->gl_config.multisamplebuffers != 0 ) {
		attributes[i++] = AGL_SAMPLE_BUFFERS_ARB;
		attributes[i++] = this->gl_config.multisamplebuffers;
	}	
	if ( this->gl_config.multisamplesamples != 0 ) {
		attributes[i++] = AGL_SAMPLES_ARB;
		attributes[i++] = this->gl_config.multisamplesamples;
	}	
#endif
	if ( this->gl_config.accelerated > 0 ) {
		attributes[i++] = AGL_ACCELERATED;
		attributes[i++] = AGL_NO_RECOVERY;
	}

	attributes[i++] = AGL_ALL_RENDERERS;
	attributes[i]	= AGL_NONE;

	format = aglChoosePixelFormat(NULL, 0, attributes);
	if ( format == NULL ) {
		SDL_SetError("Couldn't match OpenGL desired format");
		return(-1);
	}

	glContext = aglCreateContext(format, NULL);
	if ( glContext == NULL ) {
		SDL_SetError("Couldn't create OpenGL context");
		return(-1);
	}
	aglDestroyPixelFormat(format);

    #if  TARGET_API_MAC_CARBON
	noerr = aglSetDrawable(glContext, GetWindowPort(SDL_Window));
    #else
	noerr = aglSetDrawable(glContext, (AGLDrawable)SDL_Window);
    #endif
    
	if(!noerr) {
		SDL_SetError("Unable to bind GL context to window");
		return(-1);
	}
	return(0);
#else
	SDL_SetError("OpenGL support not configured");
	return(-1);
#endif
}

void Mac_GL_Quit(_THIS)
{
#if SDL_VIDEO_OPENGL
	if ( glContext != NULL ) {
		aglSetCurrentContext(NULL);
		aglSetDrawable(glContext, NULL);
		aglDestroyContext(glContext);		
		glContext = NULL;
	}
#endif
}

#if SDL_VIDEO_OPENGL

/* Make the current context active */
int Mac_GL_MakeCurrent(_THIS)
{
	int retval;

	retval = 0;
	if( ! aglSetCurrentContext(glContext) ) {
		SDL_SetError("Unable to make GL context current");
		retval = -1;
	}
	return(retval);
}

void Mac_GL_SwapBuffers(_THIS)
{
	aglSwapBuffers(glContext);
}

int Mac_GL_LoadLibrary(_THIS, const char *location)
{
	if (location == NULL)
		location = "OpenGLLibrary";

	this->hidden->libraryHandle = SDL_LoadObject(location);

	this->gl_config.driver_loaded = 1;
	return (this->hidden->libraryHandle != NULL) ? 0 : -1;
}

void Mac_GL_UnloadLibrary(_THIS)
{
	SDL_UnloadObject(this->hidden->libraryHandle);

	this->hidden->libraryHandle = NULL;
	this->gl_config.driver_loaded = 0;
}

void* Mac_GL_GetProcAddress(_THIS, const char *proc)
{
	return SDL_LoadFunction( this->hidden->libraryHandle, proc );
}

#endif /* SDL_VIDEO_OPENGL */