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Diffstat (limited to 'progs/xdemos/glxpixmap.c')
| -rw-r--r-- | progs/xdemos/glxpixmap.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/progs/xdemos/glxpixmap.c b/progs/xdemos/glxpixmap.c deleted file mode 100644 index e1abd22cee..0000000000 --- a/progs/xdemos/glxpixmap.c +++ /dev/null @@ -1,187 +0,0 @@ - - -/* - * A demonstration of using the GLXPixmap functions. This program is in - * the public domain. - * - * Brian Paul - */ - - -#include <GL/gl.h> -#define GLX_GLXEXT_PROTOTYPES -#include <GL/glx.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - - -static GLXContext ctx; -static XVisualInfo *visinfo; -static GC gc; - - - -static Window make_rgb_window( Display *dpy, - unsigned int width, unsigned int height ) -{ - const int sbAttrib[] = { GLX_RGBA, - GLX_RED_SIZE, 1, - GLX_GREEN_SIZE, 1, - GLX_BLUE_SIZE, 1, - None }; - const int dbAttrib[] = { GLX_RGBA, - GLX_RED_SIZE, 1, - GLX_GREEN_SIZE, 1, - GLX_BLUE_SIZE, 1, - GLX_DOUBLEBUFFER, - None }; - int scrnum; - XSetWindowAttributes attr; - unsigned long mask; - Window root; - Window win; - - scrnum = DefaultScreen( dpy ); - root = RootWindow( dpy, scrnum ); - - visinfo = glXChooseVisual( dpy, scrnum, (int *) sbAttrib ); - if (!visinfo) { - visinfo = glXChooseVisual( dpy, scrnum, (int *) dbAttrib ); - if (!visinfo) { - printf("Error: couldn't get an RGB visual\n"); - exit(1); - } - } - - /* window attributes */ - attr.background_pixel = 0; - attr.border_pixel = 0; - /* TODO: share root colormap if possible */ - attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone); - attr.event_mask = StructureNotifyMask | ExposureMask; - mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; - - win = XCreateWindow( dpy, root, 0, 0, width, height, - 0, visinfo->depth, InputOutput, - visinfo->visual, mask, &attr ); - - /* make an X GC so we can do XCopyArea later */ - gc = XCreateGC( dpy, win, 0, NULL ); - - /* need indirect context */ - ctx = glXCreateContext( dpy, visinfo, NULL, False ); - if (!ctx) { - printf("Error: glXCreateContext failed\n"); - exit(-1); - } - - printf("Direct rendering: %s\n", glXIsDirect(dpy, ctx) ? "Yes" : "No"); - - return win; -} - - -static GLXPixmap make_pixmap( Display *dpy, Window win, - unsigned int width, unsigned int height, - Pixmap *pixmap) -{ - Pixmap pm; - GLXPixmap glxpm; - XWindowAttributes attr; - - pm = XCreatePixmap( dpy, win, width, height, visinfo->depth ); - if (!pm) { - printf("Error: XCreatePixmap failed\n"); - exit(-1); - } - - XGetWindowAttributes( dpy, win, &attr ); - - /* - * IMPORTANT: - * Use the glXCreateGLXPixmapMESA funtion when using Mesa because - * Mesa needs to know the colormap associated with a pixmap in order - * to render correctly. This is because Mesa allows RGB rendering - * into any kind of visual, not just TrueColor or DirectColor. - */ -#ifdef GLX_MESA_pixmap_colormap - if (strstr(glXQueryExtensionsString(dpy, 0), "GLX_MESA_pixmap_colormap")) { - /* stand-alone Mesa, specify the colormap */ - glxpm = glXCreateGLXPixmapMESA( dpy, visinfo, pm, attr.colormap ); - } - else { - glxpm = glXCreateGLXPixmap( dpy, visinfo, pm ); - } -#else - /* This will work with Mesa too if the visual is TrueColor or DirectColor */ - glxpm = glXCreateGLXPixmap( dpy, visinfo, pm ); -#endif - - if (!glxpm) { - printf("Error: GLXCreateGLXPixmap failed\n"); - exit(-1); - } - - *pixmap = pm; - - return glxpm; -} - - - -static void event_loop( Display *dpy, GLXPixmap pm ) -{ - XEvent event; - - while (1) { - XNextEvent( dpy, &event ); - - switch (event.type) { - case Expose: - printf("Redraw\n"); - /* copy the image from GLXPixmap to window */ - XCopyArea( dpy, pm, event.xany.window, /* src, dest */ - gc, 0, 0, 300, 300, /* gc, src pos, size */ - 0, 0 ); /* dest pos */ - break; - case ConfigureNotify: - /* nothing */ - break; - } - } -} - - - -int main( int argc, char *argv[] ) -{ - Display *dpy; - Window win; - Pixmap pm; - GLXPixmap glxpm; - - dpy = XOpenDisplay(NULL); - - win = make_rgb_window( dpy, 300, 300 ); - glxpm = make_pixmap( dpy, win, 300, 300, &pm ); - - glXMakeCurrent( dpy, glxpm, ctx ); - printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - - /* Render an image into the pixmap */ - glShadeModel( GL_FLAT ); - glClearColor( 0.5, 0.5, 0.5, 1.0 ); - glClear( GL_COLOR_BUFFER_BIT ); - glViewport( 0, 0, 300, 300 ); - glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 ); - glColor3f( 0.0, 1.0, 1.0 ); - glRectf( -0.75, -0.75, 0.75, 0.75 ); - glFlush(); - glXWaitGL(); - - XMapWindow( dpy, win ); - - event_loop( dpy, pm ); - return 0; -} |