| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 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) |
| #if __MACH__ |
| location = "/System/Library/Frameworks/OpenGL.framework/OpenGL"; |
| #else |
| location = "OpenGLLibrary"; |
| #endif |
| |
| 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 */ |
| |