--- /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 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")) {
+ printf("GLX_EXT_texture_from_pixmap not supported by GLX\n");
+ exit(1);
+ }
+
+ return dpy;
+}
+
+
+static GLXFBConfig
+ChoosePixmapFBConfig(Display *display)
+{
+ int screen = DefaultScreen(display);
+ GLXFBConfig *fbconfigs;
+ int i, nfbconfigs, value;
+ float top, bottom;
+
+ 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(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 (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, 0.0);
+ glVertex2f(-1, -1);
+ glTexCoord2d(1.0, 0.0);
+ glVertex2f( 1, -1);
+ glTexCoord2d(1.0, 1.0);
+ glVertex2d(1.0, 1.0);
+ glTexCoord2d(0.0, 1.0);
+ 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 / commitdiff