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-rw-r--r--progs/egl/opengles1/pbuffer.c608
1 files changed, 608 insertions, 0 deletions
diff --git a/progs/egl/opengles1/pbuffer.c b/progs/egl/opengles1/pbuffer.c
new file mode 100644
index 00000000000..60f864445af
--- /dev/null
+++ b/progs/egl/opengles1/pbuffer.c
@@ -0,0 +1,608 @@
+/*
+ * Copyright (C) 2008 Tunsgten Graphics,Inc. All Rights Reserved.
+ */
+
+/*
+ * Test EGL Pbuffers
+ * Brian Paul
+ * August 2008
+ */
+
+
+#include <assert.h>
+#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 <GLES/gl.h>
+#include <GLES/glext.h>
+#include <EGL/egl.h>
+
+
+
+static int WinWidth = 300, WinHeight = 300;
+
+static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
+
+
+static void
+Normal(GLfloat *n, GLfloat nx, GLfloat ny, GLfloat nz)
+{
+ n[0] = nx;
+ n[1] = ny;
+ n[2] = nz;
+}
+
+static void
+Vertex(GLfloat *v, GLfloat vx, GLfloat vy, GLfloat vz)
+{
+ v[0] = vx;
+ v[1] = vy;
+ v[2] = vz;
+}
+
+static void
+Texcoord(GLfloat *v, GLfloat s, GLfloat t)
+{
+ v[0] = s;
+ v[1] = t;
+}
+
+
+/* Borrowed from glut, adapted */
+static void
+draw_torus(GLfloat r, GLfloat R, GLint nsides, GLint rings)
+{
+ int i, j;
+ GLfloat theta, phi, theta1;
+ GLfloat cosTheta, sinTheta;
+ GLfloat cosTheta1, sinTheta1;
+ GLfloat ringDelta, sideDelta;
+ GLfloat varray[100][3], narray[100][3], tarray[100][2];
+ int vcount;
+
+ glVertexPointer(3, GL_FLOAT, 0, varray);
+ glNormalPointer(GL_FLOAT, 0, narray);
+ glTexCoordPointer(2, GL_FLOAT, 0, tarray);
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glEnableClientState(GL_NORMAL_ARRAY);
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+ ringDelta = 2.0 * M_PI / rings;
+ sideDelta = 2.0 * M_PI / nsides;
+
+ theta = 0.0;
+ cosTheta = 1.0;
+ sinTheta = 0.0;
+ for (i = rings - 1; i >= 0; i--) {
+ theta1 = theta + ringDelta;
+ cosTheta1 = cos(theta1);
+ sinTheta1 = sin(theta1);
+
+ vcount = 0; /* glBegin(GL_QUAD_STRIP); */
+
+ phi = 0.0;
+ for (j = nsides; j >= 0; j--) {
+ GLfloat s0, s1, t;
+ GLfloat cosPhi, sinPhi, dist;
+
+ phi += sideDelta;
+ cosPhi = cos(phi);
+ sinPhi = sin(phi);
+ dist = R + r * cosPhi;
+
+ s0 = 20.0 * theta / (2.0 * M_PI);
+ s1 = 20.0 * theta1 / (2.0 * M_PI);
+ t = 8.0 * phi / (2.0 * M_PI);
+
+ Normal(narray[vcount], cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
+ Texcoord(tarray[vcount], s1, t);
+ Vertex(varray[vcount], cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
+ vcount++;
+
+ Normal(narray[vcount], cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
+ Texcoord(tarray[vcount], s0, t);
+ Vertex(varray[vcount], cosTheta * dist, -sinTheta * dist, r * sinPhi);
+ vcount++;
+ }
+
+ /*glEnd();*/
+ assert(vcount <= 100);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, vcount);
+
+ theta = theta1;
+ cosTheta = cosTheta1;
+ sinTheta = sinTheta1;
+ }
+
+ glDisableClientState(GL_VERTEX_ARRAY);
+ glDisableClientState(GL_NORMAL_ARRAY);
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+}
+
+
+static void
+draw(void)
+{
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix();
+ glRotatef(view_rotx, 1, 0, 0);
+ glRotatef(view_roty, 0, 1, 0);
+ glRotatef(view_rotz, 0, 0, 1);
+ glScalef(0.5, 0.5, 0.5);
+
+ draw_torus(1.0, 3.0, 30, 60);
+
+ glPopMatrix();
+
+ glFinish();
+}
+
+
+/**
+ * Draw to both the window and pbuffer and compare results.
+ */
+static void
+draw_both(EGLDisplay egl_dpy, EGLSurface egl_surf, EGLSurface egl_pbuf,
+ EGLContext egl_ctx)
+{
+ unsigned *wbuf, *pbuf;
+ int x = 100, y = 110;
+ int i, dif;
+
+ wbuf = (unsigned *) malloc(WinWidth * WinHeight * 4);
+ pbuf = (unsigned *) malloc(WinWidth * WinHeight * 4);
+
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+ /* first draw to window */
+ if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
+ printf("Error: eglMakeCurrent(window) failed\n");
+ return;
+ }
+ draw();
+ glReadPixels(0, 0, WinWidth, WinHeight, GL_RGBA, GL_UNSIGNED_BYTE, wbuf);
+ printf("Window[%d,%d] = 0x%08x\n", x, y, wbuf[y*WinWidth+x]);
+
+ eglSwapBuffers(egl_dpy, egl_surf);
+
+ /* then draw to pbuffer */
+ if (!eglMakeCurrent(egl_dpy, egl_pbuf, egl_pbuf, egl_ctx)) {
+ printf("Error: eglMakeCurrent(pbuffer) failed\n");
+ return;
+ }
+ draw();
+ glReadPixels(0, 0, WinWidth, WinHeight, GL_RGBA, GL_UNSIGNED_BYTE, pbuf);
+ printf("Pbuffer[%d,%d] = 0x%08x\n", x, y, pbuf[y*WinWidth+x]);
+
+
+ /* compare renderings */
+ for (dif = i = 0; i < WinWidth * WinHeight; i++) {
+ if (wbuf[i] != pbuf[i]) {
+ dif = 1;
+ break;
+ }
+ }
+
+ if (dif)
+ printf("Difference at %d: 0x%08x vs. 0x%08x\n", i, wbuf[i], pbuf[i]);
+ else
+ printf("Window rendering matches Pbuffer rendering!\n");
+
+ free(wbuf);
+ free(pbuf);
+}
+
+
+/* new window size or exposure */
+static void
+reshape(int width, int height)
+{
+ GLfloat ar = (GLfloat) width / (GLfloat) height;
+
+ WinWidth = width;
+ WinHeight = height;
+
+ glViewport(0, 0, (GLint) width, (GLint) height);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+
+#ifdef GL_VERSION_ES_CM_1_0
+ glFrustumf(-ar, ar, -1, 1, 5.0, 60.0);
+#else
+ glFrustum(-ar, ar, -1, 1, 5.0, 60.0);
+#endif
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(0.0, 0.0, -15.0);
+}
+
+
+static void
+make_texture(void)
+{
+#define SZ 64
+ GLenum Filter = GL_LINEAR;
+ GLubyte image[SZ][SZ][4];
+ GLuint i, j;
+
+ for (i = 0; i < SZ; i++) {
+ for (j = 0; j < SZ; j++) {
+ GLfloat d = (i - SZ/2) * (i - SZ/2) + (j - SZ/2) * (j - SZ/2);
+ d = sqrt(d);
+ if (d < SZ/3) {
+ image[i][j][0] = 255;
+ image[i][j][1] = 255;
+ image[i][j][2] = 255;
+ image[i][j][3] = 255;
+ }
+ else {
+ image[i][j][0] = 127;
+ image[i][j][1] = 127;
+ image[i][j][2] = 127;
+ image[i][j][3] = 255;
+ }
+ }
+ }
+
+ glActiveTexture(GL_TEXTURE0); /* unit 0 */
+ glBindTexture(GL_TEXTURE_2D, 42);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SZ, SZ, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, image);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, Filter);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, Filter);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+#undef SZ
+}
+
+
+
+static void
+init(void)
+{
+ static const GLfloat red[4] = {1, 0, 0, 0};
+ static const GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
+ static const GLfloat diffuse[4] = {0.7, 0.7, 0.7, 1.0};
+ static const GLfloat specular[4] = {0.001, 0.001, 0.001, 1.0};
+ static const GLfloat pos[4] = {20, 20, 50, 1};
+
+ glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, white);
+ glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 9.0);
+
+ glEnable(GL_LIGHTING);
+ glEnable(GL_LIGHT0);
+ glLightfv(GL_LIGHT0, GL_POSITION, pos);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
+ glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
+
+ glClearColor(0.4, 0.4, 0.4, 0.0);
+ glEnable(GL_DEPTH_TEST);
+
+ make_texture();
+ glEnable(GL_TEXTURE_2D);
+}
+
+
+/*
+ * Create an RGB, double-buffered X window.
+ * Return the window and context handles.
+ */
+static void
+make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
+ const char *name,
+ int x, int y, int width, int height,
+ Window *winRet,
+ EGLContext *ctxRet,
+ EGLSurface *surfRet)
+{
+ static const EGLint attribs[] = {
+ EGL_RED_SIZE, 1,
+ EGL_GREEN_SIZE, 1,
+ EGL_BLUE_SIZE, 1,
+ EGL_DEPTH_SIZE, 1,
+ EGL_NONE
+ };
+
+ int scrnum;
+ XSetWindowAttributes attr;
+ unsigned long mask;
+ Window root;
+ Window win;
+ XVisualInfo *visInfo, visTemplate;
+ int num_visuals;
+ EGLContext ctx;
+ EGLConfig config;
+ EGLint num_configs;
+ EGLint vid;
+
+ scrnum = DefaultScreen( x_dpy );
+ root = RootWindow( x_dpy, scrnum );
+
+ if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
+ printf("Error: couldn't get an EGL visual config\n");
+ exit(1);
+ }
+
+ assert(config);
+ assert(num_configs > 0);
+
+ if (!eglGetConfigAttrib(egl_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;
+ mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+ 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_ES_API);
+
+ ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL );
+ if (!ctx) {
+ printf("Error: eglCreateContext failed\n");
+ exit(1);
+ }
+
+ *surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL);
+
+ if (!*surfRet) {
+ printf("Error: eglCreateWindowSurface failed\n");
+ exit(1);
+ }
+
+ XFree(visInfo);
+
+ *winRet = win;
+ *ctxRet = ctx;
+}
+
+
+static EGLSurface
+make_pbuffer(Display *x_dpy, EGLDisplay egl_dpy, int width, int height)
+{
+ static const EGLint config_attribs[] = {
+ EGL_RED_SIZE, 1,
+ EGL_GREEN_SIZE, 1,
+ EGL_BLUE_SIZE, 1,
+ EGL_DEPTH_SIZE, 1,
+ EGL_NONE
+ };
+ EGLConfig config;
+ EGLSurface pbuf;
+ EGLint num_configs;
+ EGLint pbuf_attribs[5];
+
+ pbuf_attribs[0] = EGL_WIDTH;
+ pbuf_attribs[1] = width;
+ pbuf_attribs[2] = EGL_HEIGHT;
+ pbuf_attribs[3] = height;
+ pbuf_attribs[4] = EGL_NONE;
+
+ if (!eglChooseConfig( egl_dpy, config_attribs, &config, 1, &num_configs)) {
+ printf("Error: couldn't get an EGL config for pbuffer\n");
+ exit(1);
+ }
+
+ pbuf = eglCreatePbufferSurface(egl_dpy, config, pbuf_attribs);
+
+ return pbuf;
+}
+
+
+static void
+event_loop(Display *dpy, Window win,
+ EGLDisplay egl_dpy, EGLSurface egl_surf, EGLSurface egl_pbuf,
+ EGLContext egl_ctx)
+{
+ int anim = 0;
+
+ while (1) {
+ int redraw = 0;
+
+ if (!anim || XPending(dpy)) {
+ XEvent event;
+ XNextEvent(dpy, &event);
+
+ switch (event.type) {
+ case Expose:
+ redraw = 1;
+ break;
+ case ConfigureNotify:
+ if (event.xconfigure.window == win)
+ 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 {
+ r = XLookupString(&event.xkey, buffer, sizeof(buffer),
+ NULL, NULL);
+ if (buffer[0] == ' ') {
+ anim = !anim;
+ }
+ else if (buffer[0] == 27) {
+ /* escape */
+ return;
+ }
+ }
+ }
+ redraw = 1;
+ break;
+ default:
+ ; /*no-op*/
+ }
+ }
+
+ if (anim) {
+ view_rotx += 1.0;
+ view_roty += 2.0;
+ redraw = 1;
+ }
+
+ if (redraw) {
+ draw_both(egl_dpy, egl_surf, egl_pbuf, egl_ctx);
+ }
+ }
+}
+
+
+static void
+usage(void)
+{
+ printf("Usage:\n");
+ printf(" -display <displayname> set the display to run on\n");
+ printf(" -info display OpenGL renderer info\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+ Display *x_dpy;
+ Window win;
+ EGLSurface egl_surf, egl_pbuf;
+ EGLContext egl_ctx;
+ EGLDisplay egl_dpy;
+ char *dpyName = NULL;
+ GLboolean printInfo = GL_FALSE;
+ EGLint egl_major, egl_minor;
+ int i;
+ const char *s;
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-display") == 0) {
+ dpyName = argv[i+1];
+ i++;
+ }
+ else if (strcmp(argv[i], "-info") == 0) {
+ printInfo = GL_TRUE;
+ }
+ else {
+ usage();
+ return -1;
+ }
+ }
+
+ x_dpy = XOpenDisplay(dpyName);
+ if (!x_dpy) {
+ printf("Error: couldn't open display %s\n",
+ dpyName ? dpyName : getenv("DISPLAY"));
+ return -1;
+ }
+
+ egl_dpy = eglGetDisplay(x_dpy);
+ if (!egl_dpy) {
+ printf("Error: eglGetDisplay() failed\n");
+ return -1;
+ }
+
+ if (!eglInitialize(egl_dpy, &egl_major, &egl_minor)) {
+ printf("Error: eglInitialize() failed\n");
+ return -1;
+ }
+
+ s = eglQueryString(egl_dpy, EGL_VERSION);
+ printf("EGL_VERSION = %s\n", s);
+
+ s = eglQueryString(egl_dpy, EGL_VENDOR);
+ printf("EGL_VENDOR = %s\n", s);
+
+ s = eglQueryString(egl_dpy, EGL_EXTENSIONS);
+ printf("EGL_EXTENSIONS = %s\n", s);
+
+ s = eglQueryString(egl_dpy, EGL_CLIENT_APIS);
+ printf("EGL_CLIENT_APIS = %s\n", s);
+
+ make_x_window(x_dpy, egl_dpy,
+ "pbuffer", 0, 0, WinWidth, WinHeight,
+ &win, &egl_ctx, &egl_surf);
+
+ egl_pbuf = make_pbuffer(x_dpy, egl_dpy, WinWidth, WinHeight);
+ if (!egl_pbuf) {
+ printf("Error: eglCreatePBufferSurface() failed\n");
+ return -1;
+ }
+
+ XMapWindow(x_dpy, win);
+ if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
+ printf("Error: eglMakeCurrent() failed\n");
+ return -1;
+ }
+
+ if (printInfo) {
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+ printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
+ printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+ }
+
+ init();
+
+ /* Set initial projection/viewing transformation.
+ * We can't be sure we'll get a ConfigureNotify event when the window
+ * first appears.
+ */
+ reshape(WinWidth, WinHeight);
+
+ event_loop(x_dpy, win, egl_dpy, egl_surf, egl_pbuf, egl_ctx);
+
+ eglDestroyContext(egl_dpy, egl_ctx);
+ eglDestroySurface(egl_dpy, egl_surf);
+ eglTerminate(egl_dpy);
+
+
+ XDestroyWindow(x_dpy, win);
+ XCloseDisplay(x_dpy);
+
+ return 0;
+}
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