+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/*
- * This program opens two GLX windows, renders into one and uses
- * glCopyPixels to copy the image from the first window into the
- * second by means of the GLX 1.3 function glxMakeContextCurrent().
- * This function works just like the glXMakeCurrentReadSGI() function
- * in the GLX_SGI_make_current_read extension.
- */
-
-
-#define GL_GLEXT_PROTOTYPES
-#define GLX_GLXEXT_PROTOTYPES
-#include <GL/gl.h>
-#include <GL/glx.h>
-#include <X11/keysym.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-#ifdef GLX_VERSION_1_3
-
-
-static Display *Dpy;
-static int ScrNum;
-static GLXContext Context;
-static Window Win[2]; /* Win[0] = source, Win[1] = dest */
-static GLint Width[2], Height[2];
-static GLboolean TestClipping = GL_FALSE;
-static GLfloat Angle = 0.0;
-
-static GLboolean DrawFront = GL_FALSE;
-
-PFNGLXMAKECURRENTREADSGIPROC make_context_current = NULL;
-
-static Window
-CreateWindow(Display *dpy, int scrnum, XVisualInfo *visinfo,
- int xpos, int ypos, int width, int height,
- const char *name)
-{
- Window win;
- XSetWindowAttributes attr;
- unsigned long mask;
- Window root;
-
- 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, root, xpos, ypos, width, height,
- 0, visinfo->depth, InputOutput,
- visinfo->visual, mask, &attr);
- if (win) {
- XSizeHints sizehints;
- sizehints.x = xpos;
- sizehints.y = ypos;
- sizehints.width = width;
- sizehints.height = height;
- sizehints.flags = USSize | USPosition;
- XSetNormalHints(dpy, win, &sizehints);
- XSetStandardProperties(dpy, win, name, name,
- None, (char **)NULL, 0, &sizehints);
-
- XMapWindow(dpy, win);
- }
- return win;
-}
-
-
-static void
-Redraw(void)
-{
- /* make the first window the current one */
- if (! (*make_context_current)(Dpy, Win[0], Win[0], Context)) {
- printf("glXMakeContextCurrent failed in Redraw()\n");
- return;
- }
-
- Angle += 1.0;
-
- if (DrawFront) {
- glDrawBuffer(GL_FRONT);
- glReadBuffer(GL_FRONT);
- }
- else {
- glDrawBuffer(GL_BACK);
- glReadBuffer(GL_BACK);
- }
-
- glViewport(0, 0, Width[0], Height[0]);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
-
- glShadeModel(GL_FLAT);
- glClearColor(0.5, 0.5, 0.5, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- /* draw blue quad */
- glColor3f(0.3, 0.3, 1.0);
- glPushMatrix();
- glRotatef(Angle, 0, 0, 1);
- glBegin(GL_POLYGON);
- glVertex2f(-0.5, -0.25);
- glVertex2f( 0.5, -0.25);
- glVertex2f( 0.5, 0.25);
- glVertex2f(-0.5, 0.25);
- glEnd();
- glPopMatrix();
-
- if (DrawFront)
- glFinish();
- else
- glXSwapBuffers(Dpy, Win[0]);
-
-
- /* copy image from window 0 to window 1 */
- if (!(*make_context_current)(Dpy, Win[1], Win[0], Context)) {
- printf("glXMakeContextCurrent failed in Redraw()\n");
- return;
- }
-
- /* copy the image between windows */
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- if (TestClipping) {
- glWindowPos2iARB(-2, -2);
- glCopyPixels(-2, -2, Width[0] + 4, Height[0] + 4, GL_COLOR);
- }
- else {
- glWindowPos2iARB(0, 0);
- glCopyPixels(0, 0, Width[0], Height[0], GL_COLOR);
- }
-
- if (DrawFront)
- glFinish();
- else
- glXSwapBuffers(Dpy, Win[1]);
-}
-
-
-
-static void
-Resize(Window win, unsigned int width, unsigned int height)
-{
- int i;
- if (win == Win[0]) {
- i = 0;
- }
- else {
- i = 1;
- }
- Width[i] = width;
- Height[i] = height;
- if (!glXMakeCurrent(Dpy, Win[i], Context)) {
- printf("glXMakeCurrent failed in Resize()\n");
- return;
- }
-}
-
-
-
-static void
-EventLoop(void)
-{
- XEvent event;
- while (1) {
- if (XPending(Dpy) > 0) {
- XNextEvent( Dpy, &event );
- switch (event.type) {
- case Expose:
- Redraw();
- break;
- case ConfigureNotify:
- Resize(event.xany.window, event.xconfigure.width, event.xconfigure.height);
- break;
- case KeyPress:
- {
- char buf[100];
- KeySym keySym;
- XComposeStatus stat;
- XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
- if (keySym == XK_Escape) {
- /* exit */
- return;
- }
- else if (buf[0] == 'f') {
- DrawFront = !DrawFront;
- printf("Drawing to %s buffer\n",
- DrawFront ? "GL_FRONT" : "GL_BACK");
- }
- }
- break;
- default:
- /*no-op*/ ;
- }
- }
- else {
- /* animate */
- Redraw();
- }
- }
-}
-
-
-static void
-Init(void)
-{
- XVisualInfo *visinfo;
- int attrib[] = { GLX_RGBA,
- GLX_RED_SIZE, 1,
- GLX_GREEN_SIZE, 1,
- GLX_BLUE_SIZE, 1,
- GLX_DOUBLEBUFFER,
- None };
- int major, minor;
-
- Dpy = XOpenDisplay(NULL);
- if (!Dpy) {
- printf("Couldn't open default display!\n");
- exit(1);
- }
-
- ScrNum = DefaultScreen(Dpy);
-
- glXQueryVersion(Dpy, &major, &minor);
-
- if (major * 100 + minor >= 103) {
- make_context_current = (PFNGLXMAKECURRENTREADSGIPROC)
- glXGetProcAddressARB( (GLubyte *) "glXMakeContextCurrent" );
- }
- else {
- const char * const glxExtensions = glXQueryExtensionsString(Dpy, ScrNum);
- const char * ext = strstr( glxExtensions, "GLX_SGI_make_current_read" );
- const size_t len = strlen( "GLX_SGI_make_current_read" );
-
- if ( (ext != NULL)
- && ((ext[len] == ' ') || (ext[len] == '\0')) ) {
- make_context_current = (PFNGLXMAKECURRENTREADSGIPROC)
- glXGetProcAddressARB( (GLubyte *) "glXMakeCurrentReadSGI" );
- }
- }
-
- if (make_context_current == NULL) {
- fprintf(stderr, "Sorry, this program requires either GLX 1.3 "
- "or GLX_SGI_make_current_read.\n");
- exit(1);
- }
-
- visinfo = glXChooseVisual(Dpy, ScrNum, attrib);
- if (!visinfo) {
- printf("Unable to find RGB, double-buffered visual\n");
- exit(1);
- }
-
- Context = glXCreateContext(Dpy, visinfo, NULL, True);
- if (!Context) {
- printf("Couldn't create GLX context\n");
- exit(1);
- }
-
-
- Win[0] = CreateWindow(Dpy, ScrNum, visinfo,
- 0, 0, 300, 300, "source window");
-
- Win[1] = CreateWindow(Dpy, ScrNum, visinfo,
- 350, 0, 300, 300, "dest window");
-
- printf("Press Esc to exit\n");
- printf("Press 'f' to toggle front/back buffer drawing\n");
-}
-
-
-int
-main(int argc, char *argv[])
-{
- if (argc > 1 && strcmp(argv[1], "-clip") == 0)
- TestClipping = GL_TRUE;
- Init();
- EventLoop();
- return 0;
-}
-
-
-#else
-
-
-int
-main(int argc, char *argv[])
-{
- printf("This program requires GLX 1.3!\n");
- return 0;
-}
-
-
-#endif /* GLX_VERSION_1_3 */
projects / mesa.git / blobdiff