diff options
Diffstat (limited to 'progs/xdemos')
| -rw-r--r-- | progs/xdemos/Makefile | 1 | ||||
| -rw-r--r-- | progs/xdemos/texture_from_pixmap.c | 396 |
2 files changed, 397 insertions, 0 deletions
diff --git a/progs/xdemos/Makefile b/progs/xdemos/Makefile index ec85464bec0..d1d7fecea1c 100644 --- a/progs/xdemos/Makefile +++ b/progs/xdemos/Makefile @@ -23,6 +23,7 @@ PROGS = glthreads \ overlay \ pbinfo \ pbdemo \ + texture_from_pixmap \ wincopy \ xfont \ xrotfontdemo \ diff --git a/progs/xdemos/texture_from_pixmap.c b/progs/xdemos/texture_from_pixmap.c new file mode 100644 index 00000000000..ab215b0ac30 --- /dev/null +++ b/progs/xdemos/texture_from_pixmap.c @@ -0,0 +1,396 @@ +/* + * 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, 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; +} |