progs/egl: Add xeglbindtex, really.

Missed this file in the earlier commit.

1 files changed, 474 insertions, 0 deletions

diff --git a/progs/egl/xeglbindtex.c b/progs/egl/xeglbindtex.c
new file mode 100644
index 0000000000..fdd9fe2b87
--- /dev/null
+++ b/progs/egl/xeglbindtex.c
@@ -0,0 +1,474 @@
+/*
+ * Simple demo for eglBindTexImage.  Based on xegl_tri.c by
+ *
+ * Copyright (C) 2008  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.
+ */
+
+/*
+ * The spec says that eglBindTexImage supports only OpenGL ES context, but this
+ * demo uses OpenGL context.  Keep in mind that this is non-standard.
+ */
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <GL/gl.h>
+#include <EGL/egl.h>
+
+static EGLDisplay dpy;
+static EGLContext ctx_win, ctx_pbuf;
+static EGLSurface surf_win, surf_pbuf;
+static GLuint tex_pbuf;
+
+static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
+static GLboolean blend = GL_TRUE;
+static GLuint color_flow;
+
+static void
+make_pbuffer(int width, int height)
+{
+   static const EGLint config_attribs[] = {
+      EGL_RED_SIZE, 8,
+      EGL_GREEN_SIZE, 8,
+      EGL_BLUE_SIZE, 8,
+      EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE,
+      EGL_NONE
+   };
+   EGLint pbuf_attribs[] = {
+      EGL_WIDTH, width,
+      EGL_HEIGHT, height,
+      EGL_TEXTURE_FORMAT, EGL_TEXTURE_RGB,
+      EGL_TEXTURE_TARGET, EGL_TEXTURE_2D,
+      EGL_NONE
+   };
+   EGLConfig config;
+   EGLint num_configs;
+
+   if (!eglChooseConfig(dpy, config_attribs, &config, 1, &num_configs)) {
+      printf("Error: couldn't get an EGL visual config for pbuffer\n");
+      exit(1);
+   }
+
+   eglBindAPI(EGL_OPENGL_API);
+   ctx_pbuf = eglCreateContext(dpy, config, EGL_NO_CONTEXT, NULL );
+   surf_pbuf = eglCreatePbufferSurface(dpy, config, pbuf_attribs);
+   if (surf_pbuf == EGL_NO_SURFACE) {
+      printf("failed to allocate pbuffer\n");
+      exit(1);
+   }
+
+   glGenTextures(1, &tex_pbuf);
+}
+
+static void
+use_pbuffer(void)
+{
+   static int initialized;
+
+   eglMakeCurrent(dpy, surf_pbuf, surf_pbuf, ctx_pbuf);
+   if (!initialized) {
+      EGLint width, height;
+      GLfloat ar;
+
+      initialized = 1;
+
+      eglQuerySurface(dpy, surf_pbuf, EGL_WIDTH, &width);
+      eglQuerySurface(dpy, surf_pbuf, EGL_WIDTH, &height);
+      ar = (GLfloat) width / (GLfloat) height;
+
+      glViewport(0, 0, (GLint) width, (GLint) height);
+
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glFrustum(-ar, ar, -1, 1, 1.0, 10.0);
+
+      glMatrixMode(GL_MODELVIEW);
+      glLoadIdentity();
+
+      /* y-inverted */
+      glScalef(1.0, -1.0, 1.0);
+
+      glTranslatef(0.0, 0.0, -5.0);
+
+      glClearColor(0.2, 0.2, 0.2, 0.0);
+   }
+}
+
+static void
+make_window(Display *x_dpy, const char *name,
+            int x, int y, int width, int height,
+            Window *winRet)
+{
+   static const EGLint attribs[] = {
+      EGL_RED_SIZE, 8,
+      EGL_GREEN_SIZE, 8,
+      EGL_BLUE_SIZE, 8,
+      EGL_ALPHA_SIZE, 8,
+      EGL_DEPTH_SIZE, 8,
+      EGL_NONE
+   };
+
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   XVisualInfo *visInfo, visTemplate;
+   int num_visuals;
+   EGLConfig config;
+   EGLint num_configs, vid;
+
+   scrnum = DefaultScreen( x_dpy );
+   root = RootWindow( x_dpy, scrnum );
+
+   if (!eglChooseConfig(dpy, attribs, &config, 1, &num_configs)) {
+      printf("Error: couldn't get an EGL visual config\n");
+      exit(1);
+   }
+
+   if (!eglGetConfigAttrib(dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
+      printf("Error: eglGetConfigAttrib() failed\n");
+      exit(1);
+   }
+
+   /* The X window visual must match the EGL config */
+   visTemplate.visualid = vid;
+   visInfo = XGetVisualInfo(x_dpy, VisualIDMask, &visTemplate, &num_visuals);
+   if (!visInfo) {
+      printf("Error: couldn't get X visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( x_dpy, root, visInfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   attr.override_redirect = 0;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
+
+   win = XCreateWindow( x_dpy, root, 0, 0, width, height,
+		        0, visInfo->depth, InputOutput,
+		        visInfo->visual, mask, &attr );
+
+   /* set hints and properties */
+   {
+      XSizeHints sizehints;
+      sizehints.x = x;
+      sizehints.y = y;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(x_dpy, win, &sizehints);
+      XSetStandardProperties(x_dpy, win, name, name,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+   eglBindAPI(EGL_OPENGL_API);
+   ctx_win = eglCreateContext(dpy, config, EGL_NO_CONTEXT, NULL );
+   if (!ctx_win) {
+      printf("Error: glXCreateContext failed\n");
+      exit(1);
+   }
+
+   surf_win = eglCreateWindowSurface(dpy, config, win, NULL);
+
+   XFree(visInfo);
+
+   *winRet = win;
+}
+
+static void
+use_window(void)
+{
+   static int initialized;
+
+   eglMakeCurrent(dpy, surf_win, surf_win, ctx_win);
+   if (!initialized) {
+      initialized = 1;
+      glEnable(GL_TEXTURE_2D);
+      glBindTexture(GL_TEXTURE_2D, tex_pbuf);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   }
+}
+
+static void
+draw_triangle(void)
+{
+   static const GLfloat verts[3][2] = {
+      { -3, -3 },
+      {  3, -3 },
+      {  0,  3 }
+   };
+   GLfloat colors[3][3] = {
+      { 1, 0, 0 },
+      { 0, 1, 0 },
+      { 0, 0, 1 }
+   };
+   GLint i;
+
+   /* flow the color */
+   for (i = 0; i < 3; i++) {
+      GLint first = (i + color_flow / 256) % 3;
+      GLint second = (first + 1) % 3;
+      GLint third = (second + 1) % 3;
+      GLfloat c = (color_flow % 256) / 256.0f;
+
+      c = c * c * c;
+      colors[i][first] = 1.0f - c;
+      colors[i][second] = c;
+      colors[i][third] = 0.0f;
+   }
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glVertexPointer(2, GL_FLOAT, 0, verts);
+   glColorPointer(3, GL_FLOAT, 0, colors);
+   glEnableClientState(GL_VERTEX_ARRAY);
+   glEnableClientState(GL_COLOR_ARRAY);
+
+   glDrawArrays(GL_TRIANGLES, 0, 3);
+
+   glDisableClientState(GL_VERTEX_ARRAY);
+   glDisableClientState(GL_COLOR_ARRAY);
+}
+
+static void
+draw_textured_cube(void)
+{
+   static const GLfloat verts[][2] = {
+      { -4, -4 },
+      {  4, -4 },
+      {  4,  4 },
+      { -4,  4 }
+   };
+   static const GLfloat colors[][4] = {
+      { 1, 1, 1, 0.5 },
+      { 1, 1, 1, 0.5 },
+      { 1, 1, 1, 0.5 },
+      { 1, 1, 1, 0.5 }
+   };
+   static const GLfloat texs[][2] = {
+      { 0, 0 },
+      { 1, 0 },
+      { 1, 1 },
+      { 0, 1 }
+   };
+   static const GLfloat xforms[6][4] = {
+      {   0, 0, 1, 0 },
+      {  90, 0, 1, 0 },
+      { 180, 0, 1, 0 },
+      { 270, 0, 1, 0 },
+      {  90, 1, 0, 0 },
+      { -90, 1, 0, 0 }
+   };
+   GLint i;
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   if (blend) {
+      glDisable(GL_DEPTH_TEST);
+      glEnable(GL_BLEND);
+   } else {
+      glEnable(GL_DEPTH_TEST);
+      glDisable(GL_BLEND);
+   }
+
+   glVertexPointer(2, GL_FLOAT, 0, verts);
+   glColorPointer(4, GL_FLOAT, 0, colors);
+   glTexCoordPointer(2, GL_FLOAT, 0, texs);
+
+   glEnableClientState(GL_VERTEX_ARRAY);
+   glEnableClientState(GL_COLOR_ARRAY);
+   glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+   for (i = 0; i < 6; i++) {
+      glPushMatrix();
+      glRotatef(xforms[i][0], xforms[i][1], xforms[i][2], xforms[i][3]);
+      glTranslatef(0, 0, 4.1);
+      glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+      glPopMatrix();
+   }
+
+   glDisableClientState(GL_VERTEX_ARRAY);
+   glDisableClientState(GL_COLOR_ARRAY);
+   glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+}
+
+static void
+draw(void)
+{
+   use_pbuffer();
+   draw_triangle();
+
+   use_window();
+
+   eglBindTexImage(dpy, surf_pbuf, EGL_BACK_BUFFER);
+
+   glPushMatrix();
+   glRotatef(view_rotx, 1, 0, 0);
+   glRotatef(view_roty, 0, 1, 0);
+   glRotatef(view_rotz, 0, 0, 1);
+
+   draw_textured_cube();
+
+   glPopMatrix();
+
+   eglReleaseTexImage(dpy, surf_pbuf, EGL_BACK_BUFFER);
+}
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+   GLfloat ar = (GLfloat) width / (GLfloat) height;
+
+   use_window();
+
+   glViewport(0, 0, (GLint) width, (GLint) height);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-ar, ar, -1, 1, 5.0, 60.0);
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -40.0);
+}
+
+static void
+event_loop(Display *x_dpy, Window win)
+{
+   while (1) {
+      int redraw = 1;
+
+      if (XPending(x_dpy) > 0) {
+         XEvent event;
+         XNextEvent(x_dpy, &event);
+
+         switch (event.type) {
+         case Expose:
+            redraw = 1;
+            break;
+         case ConfigureNotify:
+            reshape(event.xconfigure.width, event.xconfigure.height);
+            break;
+         case KeyPress:
+            {
+               char buffer[10];
+               int r, code;
+               code = XLookupKeysym(&event.xkey, 0);
+               if (code == XK_Left) {
+                  view_roty += 5.0;
+               }
+               else if (code == XK_Right) {
+                  view_roty -= 5.0;
+               }
+               else if (code == XK_Up) {
+                  view_rotx += 5.0;
+               }
+               else if (code == XK_Down) {
+                  view_rotx -= 5.0;
+               }
+               else if (code == XK_b) {
+                  blend = !blend;
+               }
+               else {
+                  r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+                        NULL, NULL);
+                  if (buffer[0] == 27) {
+                     /* escape */
+                     return;
+                  }
+               }
+            }
+            redraw = 1;
+            break;
+         default:
+            ; /*no-op*/
+         }
+      }
+
+      if (redraw) {
+         view_rotx += 1.0;
+         view_roty += 2.0;
+         view_rotz += 1.5;
+         color_flow += 20;
+         draw();
+         eglSwapBuffers(dpy, surf_win);
+      }
+   }
+}
+
+int
+main(int argc, char *argv[])
+{
+   const int winWidth = 300, winHeight = 300;
+   Display *x_dpy;
+   Window win;
+   char *dpyName = NULL;
+   EGLint egl_major, egl_minor;
+   const char *s;
+
+   x_dpy = XOpenDisplay(dpyName);
+   if (!x_dpy) {
+      printf("Error: couldn't open display %s\n",
+	     dpyName ? dpyName : getenv("DISPLAY"));
+      return -1;
+   }
+
+   dpy = eglGetDisplay(x_dpy);
+   if (!dpy) {
+      printf("Error: eglGetDisplay() failed\n");
+      return -1;
+   }
+
+   if (!eglInitialize(dpy, &egl_major, &egl_minor)) {
+      printf("Error: eglInitialize() failed\n");
+      return -1;
+   }
+
+   s = eglQueryString(dpy, EGL_VERSION);
+   printf("EGL_VERSION = %s\n", s);
+
+   make_window(x_dpy, "color flow", 0, 0, winWidth, winHeight, &win);
+   make_pbuffer(winWidth, winHeight);
+
+   XMapWindow(x_dpy, win);
+
+   reshape(winWidth, winHeight);
+   event_loop(x_dpy, win);
+
+   glDeleteTextures(1, &tex_pbuf);
+
+   eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+   eglTerminate(dpy);
+
+   XDestroyWindow(x_dpy, win);
+   XCloseDisplay(x_dpy);
+
+   return 0;
+}