Mercurial > sdl-ios-xcode
view src/video/x11/SDL_x11gl_c.h @ 1240:3b8a43c428bb
From Bug #36:
There are a couple of issues with the selection of Altivec alpha-blitting
routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c.
1) There's no check for the presence of Altivec when checking if the
Blit32to565PixelAlphaAltivec() routine can be selected.
2) Altivec cannot be used in video memory, and there's no check if the
destination surface is a hardware surface. (Alpha-blitting to a hardware
surface with GPU support is a bad idea, but somebody's bound to do it anyway.)
Patch to fix these attached.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sun, 08 Jan 2006 21:18:15 +0000 |
parents | 2bd4cec0de63 |
children | c9b51268668f |
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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 */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #ifdef HAVE_OPENGL_X11 #include <GL/glx.h> #ifdef USE_DLOPEN #include <dlfcn.h> #else #include "SDL_loadso.h" #endif #endif #include "SDL_sysvideo.h" struct SDL_PrivateGLData { int gl_active; /* to stop switching drivers while we have a valid context */ #ifdef HAVE_OPENGL_X11 GLXContext glx_context; /* Current GL context */ XVisualInfo* glx_visualinfo; /* XVisualInfo* returned by glXChooseVisual */ void * (*glXGetProcAddress)(const GLubyte *procName); XVisualInfo* (*glXChooseVisual) ( Display* dpy, int screen, int* attribList ); GLXContext (*glXCreateContext) ( Display* dpy, XVisualInfo* vis, GLXContext shareList, Bool direct ); void (*glXDestroyContext) ( Display* dpy, GLXContext ctx ); Bool (*glXMakeCurrent) ( Display* dpy, GLXDrawable drawable, GLXContext ctx ); void (*glXSwapBuffers) ( Display* dpy, GLXDrawable drawable ); int (*glXGetConfig) ( Display* dpy, XVisualInfo* visual_info, int attrib, int* value ); void (*glXReleaseBuffersMESA) ( Display* dpy, GLXDrawable drawable ); const char *(*glXQueryExtensionsString) ( Display* dpy, int screen); #endif /* HAVE_OPENGL_X11 */ }; /* Old variable names */ #define gl_active (this->gl_data->gl_active) #define glx_context (this->gl_data->glx_context) #define glx_visualinfo (this->gl_data->glx_visualinfo) /* OpenGL functions */ extern XVisualInfo *X11_GL_GetVisual(_THIS); extern int X11_GL_CreateWindow(_THIS, int w, int h); extern int X11_GL_CreateContext(_THIS); extern void X11_GL_Shutdown(_THIS); #ifdef HAVE_OPENGL_X11 extern int X11_GL_MakeCurrent(_THIS); extern int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value); extern void X11_GL_SwapBuffers(_THIS); extern int X11_GL_LoadLibrary(_THIS, const char* path); extern void *X11_GL_GetProcAddress(_THIS, const char* proc); #endif extern void X11_GL_UnloadLibrary(_THIS);