view src/video/ataricommon/SDL_atarigl_c.h @ 1076:8d3b95ece376

[PATCH] SDL_GetVideoMode() do not find the best video mode The current GetVideoMode() function stops at the first mode which has any dimensions smaller than the one asked, and gives the previous in the list. If I ask 336x224 with this list: 768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200 SDL will give me 640x400, because 640x200 as height smaller than what I asked. However the best mode is the smaller which has both dimensions bigger than the one asked (384x240 in my example). This patch fixes this, plus it does not rely on a sorted video mode list.
author Patrice Mandin <patmandin@gmail.com>
date Sun, 12 Jun 2005 16:12:55 +0000
parents 2ab1cb02a44e
children 19418e4422cb
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/* Atari OSMesa.ldg implementation of SDL OpenGL support */

#ifndef _SDL_ATARIGL_H_
#define _SDL_ATARIGL_H_

#ifdef HAVE_OPENGL
#include <GL/osmesa.h>
#endif

#include "SDL_sysvideo.h"
#define _THIS   SDL_VideoDevice *this

struct SDL_PrivateGLData {

    int gl_active; 	/* to stop switching drivers while we have a valid context */
	
	int gl_oldmesa;	/* Old OpenGL support ? */

	int	gl_pixelsize;	/* for CopyShadow functions */

	SDL_bool gl_upsidedown; /* Some implementations draw upside down */

	Uint8 *gl_shadow;	/* Shadow buffer for old implementations */

	/* for unsupported OSMesa buffer formats */
	void (*ConvertSurface)(_THIS, SDL_Surface *surface);	

	/* to convert the shadow buffer to the screen format */
	void (*CopyShadow)(_THIS, SDL_Surface *surface);	

#ifdef HAVE_OPENGL
	OSMesaContext	ctx;

	/* OpenGL functions */
	void (*glGetIntegerv)( GLenum pname, GLint *value );
	void (*glFinish)(void);
	void (*glFlush)(void);

	/* osmesa.ldg */
	OSMesaContext (*OSMesaCreateContextExt)( GLenum format, GLint depthBits, GLint stencilBits, GLint accumBits, OSMesaContext sharelist);
	void (*OSMesaDestroyContext)( OSMesaContext ctx );
	GLboolean (*OSMesaMakeCurrent)( OSMesaContext ctx, void *buffer, GLenum type, GLsizei width, GLsizei height );
	void (*OSMesaPixelStore)( GLint pname, GLint value );
	void * (*OSMesaGetProcAddress)( const char *funcName );

	/* mesa_gl.ldg, tiny_gl.ldg */
	void *(*OSMesaCreateLDG)( long format, long type, long width, long height );
	void (*OSMesaDestroyLDG)(void);

	/* Info needed to compare existing context with new asked one */
	int width, height;
	GLenum format;
	GLint depth,stencil,accum;
#endif
};

/* Variable names */
#define gl_active		(this->gl_data->gl_active)
#define gl_ctx			(this->gl_data->ctx)
#define gl_oldmesa		(this->gl_data->gl_oldmesa)
#define gl_pixelsize	(this->gl_data->gl_pixelsize)
#define gl_upsidedown	(this->gl_data->gl_upsidedown)
#define gl_shadow		(this->gl_data->gl_shadow)
#define gl_convert		(this->gl_data->ConvertSurface)
#define gl_copyshadow	(this->gl_data->CopyShadow)
#define gl_curformat	(this->gl_data->format)
#define gl_curdepth		(this->gl_data->depth)
#define gl_curstencil	(this->gl_data->stencil)
#define gl_curaccum		(this->gl_data->accum)
#define gl_curwidth		(this->gl_data->width)
#define gl_curheight	(this->gl_data->height)

/* OpenGL functions */
extern int SDL_AtariGL_Init(_THIS, SDL_Surface *current);
extern void SDL_AtariGL_Quit(_THIS, SDL_bool unload);
extern void SDL_AtariGL_InitPointers(_THIS);

extern int SDL_AtariGL_LoadLibrary(_THIS, const char *path);
extern void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc);
extern int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
extern int SDL_AtariGL_MakeCurrent(_THIS);
extern void SDL_AtariGL_SwapBuffers(_THIS);

#endif /* _SDL_ATARIGL_H_ */