diff options
Diffstat (limited to 'progs/xdemos/overlay.c')
| -rw-r--r-- | progs/xdemos/overlay.c | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/progs/xdemos/overlay.c b/progs/xdemos/overlay.c deleted file mode 100644 index 758f85c449..0000000000 --- a/progs/xdemos/overlay.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * GLX overlay test/demo. - * - * Brian Paul - * 18 July 2005 - */ - -#include <GL/gl.h> -#include <GL/glx.h> -#include <X11/keysym.h> -#include <assert.h> -#include <stdio.h> -#include <stdlib.h> - -static int WinWidth = 300, WinHeight = 300; -static Window NormalWindow = 0; -static Window OverlayWindow = 0; -static GLXContext NormalContext = 0; -static GLXContext OverlayContext = 0; -static GLboolean RGBOverlay = GL_FALSE; -static GLfloat Angle = 0.0; - - -static void -RedrawNormal(Display *dpy) -{ - glXMakeCurrent(dpy, NormalWindow, NormalContext); - glViewport(0, 0, WinWidth, WinHeight); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0); - glMatrixMode(GL_MODELVIEW); - glClearColor(0.5, 0.5, 0.5, 1.0); - glClear(GL_COLOR_BUFFER_BIT); - glColor3f(1.0, 1.0, 0.0); - glPushMatrix(); - glRotatef(Angle, 0, 0, 1); - glRectf(-0.8, -0.8, 0.8, 0.8); - glPopMatrix(); - glXSwapBuffers(dpy, NormalWindow); -} - - -static void -RedrawOverlay(Display *dpy) -{ - glXMakeCurrent(dpy, OverlayWindow, OverlayContext); - glViewport(0, 0, WinWidth, WinHeight); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0); - glMatrixMode(GL_MODELVIEW); - glClear(GL_COLOR_BUFFER_BIT); - if (RGBOverlay) { - glColor3f(0.0, 1.0, 1.0); - } - else { - glIndexi(2); - } - glBegin(GL_LINES); - glVertex2f(-1, -1); - glVertex2f(1, 1); - glVertex2f(1, -1); - glVertex2f(-1, 1); - glEnd(); - glXSwapBuffers(dpy, OverlayWindow); -} - - -static Window -MakeWindow(Display *dpy, XVisualInfo *visinfo, Window parent, - unsigned int width, unsigned int height) -{ - int scrnum; - XSetWindowAttributes attr; - unsigned long mask; - Window root; - Window win; - - scrnum = DefaultScreen(dpy); - root = RootWindow(dpy, scrnum); - - /* window attributes */ - attr.background_pixel = 0; - attr.border_pixel = 0; - attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone); - attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask; - mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; - - win = XCreateWindow(dpy, parent, 0, 0, width, height, - 0, visinfo->depth, InputOutput, - visinfo->visual, mask, &attr); - return win; -} - - -static void -MakeNormalWindow(Display *dpy) -{ - int attrib[] = { GLX_RGBA, - GLX_RED_SIZE, 1, - GLX_GREEN_SIZE, 1, - GLX_BLUE_SIZE, 1, - GLX_DOUBLEBUFFER, - None }; - int scrnum; - Window root; - XVisualInfo *visinfo; - - scrnum = DefaultScreen(dpy); - root = RootWindow(dpy, scrnum); - - visinfo = glXChooseVisual(dpy, scrnum, attrib); - if (!visinfo) { - printf("Error: couldn't get an RGB, Double-buffered visual\n"); - exit(1); - } - - NormalWindow = MakeWindow(dpy, visinfo, root, WinWidth, WinHeight); - assert(NormalWindow); - - NormalContext = glXCreateContext(dpy, visinfo, NULL, True); - assert(NormalContext); -} - - -static void -MakeOverlayWindow(Display *dpy) -{ - int rgbAttribs[] = { - GLX_RGBA, - GLX_RED_SIZE, 1, - GLX_GREEN_SIZE, 1, - GLX_BLUE_SIZE, 1, - GLX_DOUBLEBUFFER, - GLX_LEVEL, 1, - None - }; - int indexAttribs[] = { - /*GLX_RGBA, leave this out */ - GLX_RED_SIZE, 1, - GLX_GREEN_SIZE, 1, - GLX_BLUE_SIZE, 1, - GLX_DOUBLEBUFFER, - GLX_LEVEL, 1, - None - }; - int scrnum; - Window root; - XVisualInfo *visinfo; - - scrnum = DefaultScreen(dpy); - root = RootWindow(dpy, scrnum); - - visinfo = glXChooseVisual(dpy, scrnum, rgbAttribs); - if (visinfo) { - printf("Found RGB overlay visual 0x%x\n", (int) visinfo->visualid); - RGBOverlay = GL_TRUE; - } - else { - visinfo = glXChooseVisual(dpy, scrnum, indexAttribs); - if (visinfo) { - printf("Found Color Index overlay visual 0x%x\n", - (int) visinfo->visualid); - /* XXX setup the colormap entries! */ - } - else { - printf("Couldn't get an overlay visual.\n"); - printf("Your hardware probably doesn't support framebuffer overlay planes.\n"); - exit(1); - } - } - - OverlayWindow = MakeWindow(dpy, visinfo, NormalWindow, WinWidth, WinHeight); - assert(OverlayWindow); - - OverlayContext = glXCreateContext(dpy, visinfo, NULL, True); - assert(OverlayContext); -} - - -static void -EventLoop(Display *dpy) -{ - XEvent event; - - while (1) { - XNextEvent(dpy, &event); - - switch (event.type) { - case Expose: - RedrawNormal(dpy); - RedrawOverlay(dpy); - break; - case ConfigureNotify: - WinWidth = event.xconfigure.width; - WinHeight = event.xconfigure.height; - if (event.xconfigure.window == NormalWindow) - XResizeWindow(dpy, OverlayWindow, WinWidth, WinHeight); - break; - case KeyPress: - { - char buffer[10]; - int r, code; - code = XLookupKeysym(&event.xkey, 0); - r = XLookupString(&event.xkey, buffer, sizeof(buffer), - NULL, NULL); - if (buffer[0] == 27) { - /* escape */ - return; - } - else if (buffer[0] == ' ') { - Angle += 5.0; - RedrawNormal(dpy); - } - } - break; - default: - ; /* nothing */ - } - } -} - - -int -main(int argc, char *argv[]) -{ - Display *dpy = XOpenDisplay(NULL); - - assert(dpy); - - MakeNormalWindow(dpy); - MakeOverlayWindow(dpy); - - XMapWindow(dpy, NormalWindow); - XMapWindow(dpy, OverlayWindow); - - EventLoop(dpy); - - glXDestroyContext(dpy, OverlayContext); - glXDestroyContext(dpy, NormalContext); - XDestroyWindow(dpy, OverlayWindow); - XDestroyWindow(dpy, NormalWindow); - - return 0; -} |