SDL_cgxgl.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:6k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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: SDL_cgxgl.c,v 1.4 2002/04/22 21:38:04 wmay Exp $";
- #endif
- /* StormMesa implementation of SDL OpenGL support */
- #include "SDL_error.h"
- #include "SDL_cgxgl_c.h"
- #include "SDL_cgxvideo.h"
- #ifdef HAVE_OPENGL
- AmigaMesaContext glcont=NULL;
- #endif
- /* Init OpenGL */
- int CGX_GL_Init(_THIS)
- {
- #ifdef HAVE_OPENGL
- int i = 0;
- struct TagItem attributes [ 14 ]; /* 14 should be more than enough :) */
- struct Window *win = (struct Window *)SDL_Window;
- // default config. Always used...
- attributes[i].ti_Tag = AMA_Window; attributes[i++].ti_Data = (unsigned long)win;
- attributes[i].ti_Tag = AMA_Left; attributes[i++].ti_Data = 0;
- attributes[i].ti_Tag = AMA_Bottom; attributes[i++].ti_Data = 0;
- attributes[i].ti_Tag = AMA_Width; attributes[i++].ti_Data = win->Width-win->BorderLeft-win->BorderRight;
- attributes[i].ti_Tag = AMA_Height; attributes[i++].ti_Data = win->Height-win->BorderBottom-win->BorderTop;
- attributes[i].ti_Tag = AMA_DirectRender; attributes[i++].ti_Data = GL_TRUE;
- // double buffer ?
- attributes[i].ti_Tag = AMA_DoubleBuf;
- if ( this->gl_config.double_buffer ) {
- attributes[i++].ti_Data = GL_TRUE;
- }
- else {
- attributes[i++].ti_Data = GL_FALSE;
- }
- // RGB(A) Mode ?
- attributes[i].ti_Tag = AMA_RGBMode;
- if ( this->gl_config.red_size != 0 &&
- this->gl_config.blue_size != 0 &&
- this->gl_config.green_size != 0 ) {
- attributes[i++].ti_Data = GL_TRUE;
- }
- else {
- attributes[i++].ti_Data = GL_FALSE;
- }
- // no depth buffer ?
- if ( this->gl_config.depth_size == 0 ) {
- attributes[i].ti_Tag = AMA_NoDepth;
- attributes[i++].ti_Data = GL_TRUE;
- }
- // no stencil buffer ?
- if ( this->gl_config.stencil_size == 0 ) {
- attributes[i].ti_Tag = AMA_NoStencil;
- attributes[i++].ti_Data = GL_TRUE;
- }
- // no accum buffer ?
- if ( this->gl_config.accum_red_size != 0 &&
- this->gl_config.accum_blue_size != 0 &&
- this->gl_config.accum_green_size != 0 ) {
- attributes[i].ti_Tag = AMA_NoAccum;
- attributes[i++].ti_Data = GL_TRUE;
- }
- // done...
- attributes[i].ti_Tag = TAG_DONE;
- glcont = AmigaMesaCreateContext(attributes);
- if ( glcont == NULL ) {
- SDL_SetError("Couldn't create OpenGL context");
- return(-1);
- }
- this->gl_data->gl_active = 1;
- this->gl_config.driver_loaded = 1;
- return(0);
- #else
- SDL_SetError("OpenGL support not configured");
- return(-1);
- #endif
- }
- /* Quit OpenGL */
- void CGX_GL_Quit(_THIS)
- {
- #ifdef HAVE_OPENGL
- if ( glcont != NULL ) {
- AmigaMesaDestroyContext(glcont);
- glcont = NULL;
- this->gl_data->gl_active = 0;
- this->gl_config.driver_loaded = 0;
- }
- #endif
- }
- /* Attach context to another window */
- int CGX_GL_Update(_THIS)
- {
- #ifdef HAVE_OPENGL
- struct TagItem tags[2];
- struct Window *win = (struct Window*)SDL_Window;
- if(glcont == NULL) {
- return -1; //should never happen
- }
- tags[0].ti_Tag = AMA_Window;
- tags[0].ti_Data = (unsigned long)win;
- tags[1].ti_Tag = TAG_DONE;
- AmigaMesaSetRast(glcont, tags);
- return 0;
- #else
- SDL_SetError("OpenGL support not configured");
- return -1;
- #endif
- }
- #ifdef HAVE_OPENGL
- /* Make the current context active */
- int CGX_GL_MakeCurrent(_THIS)
- {
- if(glcont == NULL)
- return -1;
- AmigaMesaMakeCurrent(glcont, glcont->buffer);
- return 0;
- }
- void CGX_GL_SwapBuffers(_THIS)
- {
- AmigaMesaSwapBuffers(glcont);
- }
- int CGX_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) {
- GLenum mesa_attrib;
- switch(attrib) {
- case SDL_GL_RED_SIZE:
- mesa_attrib = GL_RED_BITS;
- break;
- case SDL_GL_GREEN_SIZE:
- mesa_attrib = GL_GREEN_BITS;
- break;
- case SDL_GL_BLUE_SIZE:
- mesa_attrib = GL_BLUE_BITS;
- break;
- case SDL_GL_ALPHA_SIZE:
- mesa_attrib = GL_ALPHA_BITS;
- break;
- case SDL_GL_DOUBLEBUFFER:
- mesa_attrib = GL_DOUBLEBUFFER;
- break;
- case SDL_GL_DEPTH_SIZE:
- mesa_attrib = GL_DEPTH_BITS;
- break;
- case SDL_GL_STENCIL_SIZE:
- mesa_attrib = GL_STENCIL_BITS;
- break;
- case SDL_GL_ACCUM_RED_SIZE:
- mesa_attrib = GL_ACCUM_RED_BITS;
- break;
- case SDL_GL_ACCUM_GREEN_SIZE:
- mesa_attrib = GL_ACCUM_GREEN_BITS;
- break;
- case SDL_GL_ACCUM_BLUE_SIZE:
- mesa_attrib = GL_ACCUM_BLUE_BITS;
- break;
- case SDL_GL_ACCUM_ALPHA_SIZE:
- mesa_attrib = GL_ACCUM_ALPHA_BITS;
- break;
- default :
- return -1;
- }
- AmigaMesaGetConfig(glcont->visual, mesa_attrib, value);
- return 0;
- }
- void *CGX_GL_GetProcAddress(_THIS, const char *proc) {
- void *func = NULL;
- func = AmiGetGLProc(proc);
- return func;
- }
- int CGX_GL_LoadLibrary(_THIS, const char *path) {
- /* Library is always open */
- this->gl_config.driver_loaded = 1;
- return 0;
- }
- #endif /* HAVE_OPENGL */