+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 7.1
- *
- * Copyright (C) 1999-2007 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.
- */
-
-
-/*
- * Test the GLX_EXT_texture_from_pixmap extension
- * Brian Paul
- * 19 May 2007
- */
-
-
-#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>
-
-
-static float top, bottom;
-
-static PFNGLXBINDTEXIMAGEEXTPROC glXBindTexImageEXT_func = NULL;
-static PFNGLXRELEASETEXIMAGEEXTPROC glXReleaseTexImageEXT_func = NULL;
-
-
-static Display *
-OpenDisplay(void)
-{
- int screen;
- Display *dpy;
- const char *ext;
-
- dpy = XOpenDisplay(NULL);
- if (!dpy) {
- printf("Couldn't open default display!\n");
- exit(1);
- }
-
- screen = DefaultScreen(dpy);
- ext = glXQueryExtensionsString(dpy, screen);
- if (!strstr(ext, "GLX_EXT_texture_from_pixmap")) {
- fprintf(stderr, "GLX_EXT_texture_from_pixmap not supported.\n");
- exit(1);
- }
-
- glXBindTexImageEXT_func = (PFNGLXBINDTEXIMAGEEXTPROC)
- glXGetProcAddress((GLubyte *) "glXBindTexImageEXT");
- glXReleaseTexImageEXT_func = (PFNGLXRELEASETEXIMAGEEXTPROC)
- glXGetProcAddress((GLubyte*) "glXReleaseTexImageEXT");
-
- if (!glXBindTexImageEXT_func || !glXReleaseTexImageEXT_func) {
- fprintf(stderr, "glXGetProcAddress failed!\n");
- exit(1);
- }
-
- return dpy;
-}
-
-
-static GLXFBConfig
-ChoosePixmapFBConfig(Display *display)
-{
- int screen = DefaultScreen(display);
- GLXFBConfig *fbconfigs;
- int i, nfbconfigs = 0, value;
-
- fbconfigs = glXGetFBConfigs(display, screen, &nfbconfigs);
- for (i = 0; i < nfbconfigs; i++) {
-
- glXGetFBConfigAttrib(display, fbconfigs[i], GLX_DRAWABLE_TYPE, &value);
- if (!(value & GLX_PIXMAP_BIT))
- continue;
-
- glXGetFBConfigAttrib(display, fbconfigs[i],
- GLX_BIND_TO_TEXTURE_TARGETS_EXT, &value);
- if (!(value & GLX_TEXTURE_2D_BIT_EXT))
- continue;
-
- glXGetFBConfigAttrib(display, fbconfigs[i],
- GLX_BIND_TO_TEXTURE_RGBA_EXT, &value);
- if (value == False) {
- glXGetFBConfigAttrib(display, fbconfigs[i],
- GLX_BIND_TO_TEXTURE_RGB_EXT, &value);
- if (value == False)
- continue;
- }
-
- glXGetFBConfigAttrib(display, fbconfigs[i],
- GLX_Y_INVERTED_EXT, &value);
- if (value == True) {
- top = 0.0f;
- bottom = 1.0f;
- }
- else {
- top = 1.0f;
- bottom = 0.0f;
- }
-
- break;
- }
-
- if (i == nfbconfigs) {
- printf("Unable to find FBconfig for texturing\n");
- exit(1);
- }
-
- return fbconfigs[i];
-}
-
-
-static GLXPixmap
-CreatePixmap(Display *dpy, GLXFBConfig config, int w, int h, Pixmap *p)
-{
- GLXPixmap gp;
- const int pixmapAttribs[] = {
- GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
- GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGB_EXT,
- None
- };
- Window root = RootWindow(dpy, 0);
-
- *p = XCreatePixmap(dpy, root, w, h, 24);
- XSync(dpy, 0);
- gp = glXCreatePixmap(dpy, config, *p, pixmapAttribs);
- XSync(dpy, 0);
-
- return gp;
-}
-
-
-static void
-DrawPixmapImage(Display *dpy, Pixmap pm, int w, int h)
-{
- XGCValues gcvals;
- GC gc;
-
- gcvals.background = 0;
- gc = XCreateGC(dpy, pm, GCBackground, &gcvals);
-
- XSetForeground(dpy, gc, 0x0);
- XFillRectangle(dpy, pm, gc, 0, 0, w, h);
-
- XSetForeground(dpy, gc, 0xff0000);
- XFillRectangle(dpy, pm, gc, 0, 0, 50, 50);
-
- XSetForeground(dpy, gc, 0x00ff00);
- XFillRectangle(dpy, pm, gc, w - 50, 0, 50, 50);
-
- XSetForeground(dpy, gc, 0x0000ff);
- XFillRectangle(dpy, pm, gc, 0, h - 50, 50, 50);
-
- XSetForeground(dpy, gc, 0xffffff);
- XFillRectangle(dpy, pm, gc, h - 50, h - 50, 50, 50);
-
- XSetForeground(dpy, gc, 0xffff00);
- XSetLineAttributes(dpy, gc, 3, LineSolid, CapButt, JoinBevel);
- XDrawLine(dpy, pm, gc, 0, 0, w, h);
- XDrawLine(dpy, pm, gc, 0, h, w, 0);
-
- XFreeGC(dpy, gc);
-}
-
-
-static XVisualInfo *
-ChooseWindowVisual(Display *dpy)
-{
- int screen = DefaultScreen(dpy);
- XVisualInfo *visinfo;
- int attribs[] = {
- GLX_RGBA,
- GLX_RED_SIZE, 1,
- GLX_GREEN_SIZE, 1,
- GLX_BLUE_SIZE, 1,
- GLX_DOUBLEBUFFER,
- None
- };
-
- visinfo = glXChooseVisual(dpy, screen, attribs);
- if (!visinfo) {
- printf("Unable to find RGB, double-buffered visual\n");
- exit(1);
- }
-
- return visinfo;
-}
-
-
-static Window
-CreateWindow(Display *dpy, XVisualInfo *visinfo,
- int width, int height, const char *name)
-{
- int screen = DefaultScreen(dpy);
- Window win;
- XSetWindowAttributes attr;
- unsigned long mask;
- Window root;
-
- root = RootWindow(dpy, screen);
-
- /* 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, 0, 0, width, height,
- 0, visinfo->depth, InputOutput,
- visinfo->visual, mask, &attr);
- if (win) {
- XSizeHints sizehints;
- sizehints.width = width;
- sizehints.height = height;
- sizehints.flags = USSize;
- XSetNormalHints(dpy, win, &sizehints);
- XSetStandardProperties(dpy, win, name, name,
- None, (char **)NULL, 0, &sizehints);
-
- XMapWindow(dpy, win);
- }
- return win;
-}
-
-
-static void
-BindPixmapTexture(Display *dpy, GLXPixmap gp)
-{
- GLuint texture;
-
- glGenTextures(1, &texture);
- glBindTexture(GL_TEXTURE_2D, texture);
-
- glXBindTexImageEXT_func(dpy, gp, GLX_FRONT_LEFT_EXT, NULL);
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- glEnable(GL_TEXTURE_2D);
- /*
- glXReleaseTexImageEXT_func(display, glxpixmap, GLX_FRONT_LEFT_EXT);
- */
-}
-
-
-static void
-Resize(Window win, unsigned int width, unsigned int height)
-{
- float sz = 1.5;
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-sz, sz, -sz, sz, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
-}
-
-
-static void
-Redraw(Display *dpy, Window win, float rot)
-{
- glClearColor(0.25, 0.25, 0.25, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
- glPushMatrix();
- glRotatef(rot, 0, 0, 1);
- glRotatef(2.0 * rot, 1, 0, 0);
-
- glBegin(GL_QUADS);
- glTexCoord2d(0.0, bottom);
- glVertex2f(-1, -1);
- glTexCoord2d(1.0, bottom);
- glVertex2f( 1, -1);
- glTexCoord2d(1.0, top);
- glVertex2d(1.0, 1.0);
- glTexCoord2d(0.0, top);
- glVertex2f(-1.0, 1.0);
- glEnd();
-
- glPopMatrix();
-
- glXSwapBuffers(dpy, win);
-}
-
-
-static void
-EventLoop(Display *dpy, Window win)
-{
- GLfloat rot = 0.0;
- int anim = 0;
-
- while (1) {
- if (!anim || XPending(dpy) > 0) {
- XEvent event;
- XNextEvent(dpy, &event);
-
- switch (event.type) {
- case Expose:
- Redraw(dpy, win, rot);
- 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) {
- return; /* exit */
- }
- else if (keySym == XK_r) {
- rot += 1.0;
- Redraw(dpy, win, rot);
- }
- else if (keySym == XK_a) {
- anim = !anim;
- }
- else if (keySym == XK_R) {
- rot -= 1.0;
- Redraw(dpy, win, rot);
- }
- }
- break;
- default:
- ; /*no-op*/
- }
- }
- else {
- /* animate */
- rot += 1.0;
- Redraw(dpy, win, rot);
- }
- }
-}
-
-
-
-int
-main(int argc, char *argv[])
-{
- Display *dpy;
- GLXFBConfig pixmapConfig;
- XVisualInfo *windowVis;
- GLXPixmap gp;
- Window win;
- GLXContext ctx;
- Pixmap p;
-
- dpy = OpenDisplay();
-
- pixmapConfig = ChoosePixmapFBConfig(dpy);
- windowVis = ChooseWindowVisual(dpy);
- win = CreateWindow(dpy, windowVis, 500, 500, "Texture From Pixmap");
-
- gp = CreatePixmap(dpy, pixmapConfig, 512, 512, &p);
- DrawPixmapImage(dpy, p, 512, 512);
-
- ctx = glXCreateContext(dpy, windowVis, NULL, True);
- if (!ctx) {
- printf("Couldn't create GLX context\n");
- exit(1);
- }
-
- glXMakeCurrent(dpy, win, ctx);
-
- BindPixmapTexture(dpy, gp);
-
- EventLoop(dpy, win);
-
- return 0;
-}
projects / mesa.git / blobdiff