src/video/bwindow/SDL_bopengl.cc
author Nathan Heisey <nathanheisey@gmail.com>
Sat, 30 Jul 2011 18:26:13 +0000
changeset 5931 edf9a8e68b34
parent 5919 e19c4c44f224
child 5934 01531d8d1e01
permissions -rw-r--r--
Framebuffer code moved to SDL_bframebuffer.*, OpenGL support began
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_bopengl.h"
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#include <unistd.h>
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#include <KernelKit.h>
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#include <OpenGLKit.h>
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#include "SDL_BWin.h"
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#include "../../main/beos/SDL_BApp.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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static inline SDL_BWin *_ToBeWin(SDL_Window *window) {
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	return ((SDL_BWin*)(window->driverdata));
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}
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static inline SDL_BApp *_GetBeApp() {
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	return ((SDL_BApp*)be_app);
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}
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/* Passing a NULL path means load pointers from the application */
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int BE_GL_LoadLibrary(_THIS, const char *path)
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{
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	if (path == NULL) {
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		if (_this->gl_config.dll_handle == NULL) {
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			image_info info;
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			int32 cookie = 0;
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			while (get_next_image_info(0, &cookie, &info) == B_OK) {
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				void *location = NULL;
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				if (get_image_symbol
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				((image_id) cookie, "glBegin",
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				B_SYMBOL_TYPE_ANY, &location) == B_OK) {
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					_this->gl_config.dll_handle = (void *) cookie;
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					_this->gl_config.driver_loaded = 1;
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					SDL_strlcpy(_this->gl_config.driver_path,
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					"libGL.so",
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					SDL_arraysize(_this->
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					gl_config.driver_path));
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				}
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			}
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		}
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	} else {
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        /*
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           FIXME None of BeOS libGL.so implementations have exported functions 
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           to load BGLView, which should be reloaded from new lib.
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           So for now just "load" linked libGL.so :(
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        */
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        if (_this->gl_config.dll_handle == NULL) {
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        	return BE_GL_LoadLibrary(_this, NULL);
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        }
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            /* Unload old first */
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            /*if (_this->gl_config.dll_handle != NULL) { */
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            /* Do not try to unload application itself (if LoadLibrary was called before with NULL ;) */
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            /*      image_info info;
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               if (get_image_info((image_id)_this->gl_config.dll_handle, &info) == B_OK) {
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               if (info.type != B_APP_IMAGE) {
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               unload_add_on((image_id)_this->gl_config.dll_handle);
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               }
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               }
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               }
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               if ((_this->gl_config.dll_handle = (void*)load_add_on(path)) != (void*)B_ERROR) {
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               _this->gl_config.driver_loaded = 1;
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               SDL_strlcpy(_this->gl_config.driver_path, path, SDL_arraysize(_this->gl_config.driver_path));
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               } */
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	}
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	if (_this->gl_config.dll_handle != NULL) {
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		return 0;
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	} else {
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		_this->gl_config.dll_handle = NULL;
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		_this->gl_config.driver_loaded = 0;
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		*_this->gl_config.driver_path = '\0';
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		return -1;
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	}
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}
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void *BE_GL_GetProcAddress(_THIS, const char *proc)
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{
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	if (_this->gl_config.dll_handle != NULL) {
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		void *location = NULL;
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		status_t err;
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		if ((err =
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			get_image_symbol((image_id) _this->gl_config.dll_handle,
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                              proc, B_SYMBOL_TYPE_ANY,
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                              &location)) == B_OK) {
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            return location;
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        } else {
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                SDL_SetError("Couldn't find OpenGL symbol");
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                return NULL;
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        }
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	} else {
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		SDL_SetError("OpenGL library not loaded");
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		return NULL;
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	}
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}
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#if 0 /* Functions from 1.2 that do not appear to be used in 1.3 */
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    int BE_GL_GetAttribute(_THIS, SDL_GLattr attrib, int *value)
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    {
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        /*
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           FIXME? Right now BE_GL_GetAttribute shouldn't be called between glBegin() and glEnd() - it doesn't use "cached" values
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         */
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        switch (attrib) {
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        case SDL_GL_RED_SIZE:
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            glGetIntegerv(GL_RED_BITS, (GLint *) value);
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            break;
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        case SDL_GL_GREEN_SIZE:
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            glGetIntegerv(GL_GREEN_BITS, (GLint *) value);
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            break;
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        case SDL_GL_BLUE_SIZE:
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            glGetIntegerv(GL_BLUE_BITS, (GLint *) value);
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            break;
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        case SDL_GL_ALPHA_SIZE:
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            glGetIntegerv(GL_ALPHA_BITS, (GLint *) value);
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            break;
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        case SDL_GL_DOUBLEBUFFER:
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            glGetBooleanv(GL_DOUBLEBUFFER, (GLboolean *) value);
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            break;
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        case SDL_GL_BUFFER_SIZE:
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            int v;
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            glGetIntegerv(GL_RED_BITS, (GLint *) & v);
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            *value = v;
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            glGetIntegerv(GL_GREEN_BITS, (GLint *) & v);
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            *value += v;
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            glGetIntegerv(GL_BLUE_BITS, (GLint *) & v);
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            *value += v;
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            glGetIntegerv(GL_ALPHA_BITS, (GLint *) & v);
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            *value += v;
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            break;
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        case SDL_GL_DEPTH_SIZE:
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            glGetIntegerv(GL_DEPTH_BITS, (GLint *) value);      /* Mesa creates 16 only? r5 always 32 */
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            break;
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        case SDL_GL_STENCIL_SIZE:
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            glGetIntegerv(GL_STENCIL_BITS, (GLint *) value);
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            break;
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        case SDL_GL_ACCUM_RED_SIZE:
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            glGetIntegerv(GL_ACCUM_RED_BITS, (GLint *) value);
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            break;
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        case SDL_GL_ACCUM_GREEN_SIZE:
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            glGetIntegerv(GL_ACCUM_GREEN_BITS, (GLint *) value);
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            break;
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        case SDL_GL_ACCUM_BLUE_SIZE:
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            glGetIntegerv(GL_ACCUM_BLUE_BITS, (GLint *) value);
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            break;
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        case SDL_GL_ACCUM_ALPHA_SIZE:
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            glGetIntegerv(GL_ACCUM_ALPHA_BITS, (GLint *) value);
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            break;
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        case SDL_GL_STEREO:
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        case SDL_GL_MULTISAMPLEBUFFERS:
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        case SDL_GL_MULTISAMPLESAMPLES:
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        default:
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            *value = 0;
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            return (-1);
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        }
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        return 0;
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    }
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#endif
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    void BE_GL_SwapWindow(_THIS, SDL_Window * window) {
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        _ToBeWin(window)->SwapBuffers();
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    }
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int BE_GL_MakeCurrent(_THIS, SDL_Window * window, SDL_GLContext context) {
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	_GetBeApp()->SetCurrentContext((BGLView*)context);
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	return 0;
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}
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SDL_GLContext BE_GL_CreateContext(_THIS, SDL_Window * window) {
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	/* FIXME: Not sure what flags should be included here; may want to have
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	   most of them */
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	return (SDL_GLContext)(_ToBeWin(window)->CreateGLView(
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		BGL_RGB | BGL_DOUBLE));
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}
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void BE_GL_DeleteContext(_THIS, SDL_GLContext context) {
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	/* Currently, automatically unlocks the view */
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//	_ToBeWin(window)->RemoveGLView();	FIXME: Need to get the bwindow somehow
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}
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int BE_GL_SetSwapInterval(_THIS, int interval) {
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}
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int BE_GL_GetSwapInterval(_THIS) {
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}
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void BE_GL_UnloadLibrary(_THIS) {
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}
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#ifdef __cplusplus
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}
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#endif