/*
* Copyright (C) 1999-2001 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.
*/
/*
* Ported to X/EGL/GLES. XXX Actually, uses full OpenGL ATM.
* Brian Paul
* 30 May 2008
*/
/*
* Command line options:
* -info print GL implementation information
*
*/
#define GL_GLEXT_PROTOTYPES
#define EGL_EGLEXT_PROTOTYPES
#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>
#include <EGL/eglext.h>
#define BENCHMARK
#ifdef BENCHMARK
/* XXX this probably isn't very portable */
#include <sys/time.h>
#include <unistd.h>
/* return current time (in seconds) */
static double
current_time(void)
{
struct timeval tv;
#ifdef __VMS
(void) gettimeofday(&tv, NULL );
#else
struct timezone tz;
(void) gettimeofday(&tv, &tz);
#endif
return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
}
#else /*BENCHMARK*/
/* dummy */
static double
current_time(void)
{
/* update this function for other platforms! */
static double t = 0.0;
static int warn = 1;
if (warn) {
fprintf(stderr, "Warning: current_time() not implemented!!\n");
warn = 0;
}
return t += 1.0;
}
#endif /*BENCHMARK*/
#ifndef M_PI
#define M_PI 3.14159265
#endif
static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
static GLint gear1, gear2, gear3;
static GLfloat angle = 0.0;
/*
*
* Draw a gear wheel. You'll probably want to call this function when
* building a display list since we do a lot of trig here.
*
* Input: inner_radius - radius of hole at center
* outer_radius - radius at center of teeth
* width - width of gear
* teeth - number of teeth
* tooth_depth - depth of tooth
*/
static void
gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
GLint teeth, GLfloat tooth_depth)
{
GLint i;
GLfloat r0, r1, r2;
GLfloat angle, da;
GLfloat u, v, len;
r0 = inner_radius;
r1 = outer_radius - tooth_depth / 2.0;
r2 = outer_radius + tooth_depth / 2.0;
da = 2.0 * M_PI / teeth / 4.0;
glShadeModel(GL_FLAT);
glNormal3f(0.0, 0.0, 1.0);
/* draw front face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
if (i < teeth) {
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
}
}
glEnd();
/* draw front sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * M_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
}
glEnd();
glNormal3f(0.0, 0.0, -1.0);
/* draw back face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
if (i < teeth) {
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
}
}
glEnd();
/* draw back sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * M_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
-width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
}
glEnd();
/* draw outward faces of teeth */
glBegin(GL_QUAD_STRIP);
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
u = r2 * cos(angle + da) - r1 * cos(angle);
v = r2 * sin(angle + da) - r1 * sin(angle);
len = sqrt(u * u + v * v);
u /= len;
v /= len;
glNormal3f(v, -u, 0.0);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),
-width * 0.5);
u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
glNormal3f(v, -u, 0.0);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),
-width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
}
glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
glEnd();
glShadeModel(GL_SMOOTH);
/* draw inside radius cylinder */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * M_PI / teeth;
glNormal3f(-cos(angle), -sin(angle), 0.0);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
}
glEnd();
}
static void
draw(void)
{
glClearColor(0.2, 0.2, 0.2, 0.2);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(view_rotx, 1.0, 0.0, 0.0);
glRotatef(view_roty, 0.0, 1.0, 0.0);
glRotatef(view_rotz, 0.0, 0.0, 1.0);
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
glRotatef(angle, 0.0, 0.0, 1.0);
glCallList(gear1);
glPopMatrix();
glPushMatrix();
glTranslatef(3.1, -2.0, 0.0);
glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
glCallList(gear2);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.1, 4.2, 0.0);
glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
glCallList(gear3);
glPopMatrix();
glPopMatrix();
}
/* new window size or exposure */
static void
reshape(int width, int height)
{
GLfloat ar = (GLfloat) width / (GLfloat) height;
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
init(void)
{
static GLfloat pos[4] = { 5.0, 5.0, 10.0, 0.0 };
static GLfloat red[4] = { 0.8, 0.1, 0.0, 1.0 };
static GLfloat green[4] = { 0.0, 0.8, 0.2, 1.0 };
static GLfloat blue[4] = { 0.2, 0.2, 1.0, 1.0 };
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
/* make the gears */
gear1 = glGenLists(1);
glNewList(gear1, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
gear(1.0, 4.0, 1.0, 20, 0.7);
glEndList();
gear2 = glGenLists(1);
glNewList(gear2, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
gear(0.5, 2.0, 2.0, 10, 0.7);
glEndList();
gear3 = glGenLists(1);
glNewList(gear3, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
gear(1.3, 2.0, 0.5, 10, 0.7);
glEndList();
glEnable(GL_NORMALIZE);
}
struct egl_manager {
EGLNativeDisplayType xdpy;
EGLNativeWindowType xwin;
EGLNativePixmapType xpix;
EGLDisplay dpy;
EGLConfig conf;
EGLContext ctx;
EGLSurface win;
EGLSurface pix;
EGLSurface pbuf;
EGLImageKHR image;
EGLBoolean verbose;
EGLint major, minor;
GC gc;
GLuint fbo;
};
static struct egl_manager *
egl_manager_new(EGLNativeDisplayType xdpy, const EGLint *attrib_list,
EGLBoolean verbose)
{
struct egl_manager *eman;
const char *ver;
EGLint num_conf;
eman = calloc(1, sizeof(*eman));
if (!eman)
return NULL;
eman->verbose = verbose;
eman->xdpy = xdpy;
eman->dpy = eglGetDisplay(eman->xdpy);
if (eman->dpy == EGL_NO_DISPLAY) {
printf("eglGetDisplay() failed\n");
free(eman);
return NULL;
}
if (!eglInitialize(eman->dpy, &eman->major, &eman->minor)) {
printf("eglInitialize() failed\n");
free(eman);
return NULL;
}
ver = eglQueryString(eman->dpy, EGL_VERSION);
printf("EGL_VERSION = %s\n", ver);
if (!eglChooseConfig(eman->dpy, attrib_list, &eman->conf, 1, &num_conf) ||
!num_conf) {
printf("eglChooseConfig() failed\n");
eglTerminate(eman->dpy);
free(eman);
return NULL;
}
eman->ctx = eglCreateContext(eman->dpy, eman->conf, EGL_NO_CONTEXT, NULL);
if (eman->ctx == EGL_NO_CONTEXT) {
printf("eglCreateContext() failed\n");
eglTerminate(eman->dpy);
free(eman);
return NULL;
}
return eman;
}
static EGLBoolean
egl_manager_create_window(struct egl_manager *eman, const char *name,
EGLint w, EGLint h, EGLBoolean need_surface,
EGLBoolean fullscreen, const EGLint *attrib_list)
{
XVisualInfo vinfo_template, *vinfo = NULL;
EGLint val, num_vinfo;
Window root;
XSetWindowAttributes attrs;
unsigned long mask;
EGLint x = 0, y = 0;
if (!eglGetConfigAttrib(eman->dpy, eman->conf,
EGL_NATIVE_VISUAL_ID, &val)) {
printf("eglGetConfigAttrib() failed\n");
return EGL_FALSE;
}
if (val) {
vinfo_template.visualid = (VisualID) val;
vinfo = XGetVisualInfo(eman->xdpy, VisualIDMask, &vinfo_template, &num_vinfo);
}
/* try harder if window surface is not needed */
if (!vinfo && !need_surface &&
eglGetConfigAttrib(eman->dpy, eman->conf, EGL_BUFFER_SIZE, &val)) {
if (val == 32)
val = 24;
vinfo_template.depth = val;
vinfo = XGetVisualInfo(eman->xdpy, VisualDepthMask, &vinfo_template, &num_vinfo);
}
if (!vinfo) {
printf("XGetVisualInfo() failed\n");
return EGL_FALSE;
}
root = DefaultRootWindow(eman->xdpy);
if (fullscreen) {
x = y = 0;
w = DisplayWidth(eman->xdpy, DefaultScreen(eman->xdpy));
h = DisplayHeight(eman->xdpy, DefaultScreen(eman->xdpy));
}
/* window attributes */
attrs.background_pixel = 0;
attrs.border_pixel = 0;
attrs.colormap = XCreateColormap(eman->xdpy, root, vinfo->visual, AllocNone);
attrs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
attrs.override_redirect = fullscreen;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
eman->xwin = XCreateWindow(eman->xdpy, root, x, y, w, h,
0, vinfo->depth, InputOutput,
vinfo->visual, mask, &attrs);
XFree(vinfo);
/* set hints and properties */
{
XSizeHints sizehints;
sizehints.x = x;
sizehints.y = y;
sizehints.width = w;
sizehints.height = h;
sizehints.flags = USSize | USPosition;
XSetNormalHints(eman->xdpy, eman->xwin, &sizehints);
XSetStandardProperties(eman->xdpy, eman->xwin, name, name,
None, (char **)NULL, 0, &sizehints);
}
if (need_surface) {
eman->win = eglCreateWindowSurface(eman->dpy, eman->conf,
eman->xwin, attrib_list);
if (eman->win == EGL_NO_SURFACE) {
printf("eglCreateWindowSurface() failed\n");
XDestroyWindow(eman->xdpy, eman->xwin);
eman->xwin = None;
return EGL_FALSE;
}
}
eman->gc = XCreateGC(eman->xdpy, eman->xwin, 0, NULL);
XMapWindow(eman->xdpy, eman->xwin);
return EGL_TRUE;
}
static EGLBoolean
egl_manager_create_pixmap(struct egl_manager *eman, EGLNativeWindowType xwin,
EGLBoolean need_surface, const EGLint *attrib_list)
{
XWindowAttributes attrs;
if (!XGetWindowAttributes(eman->xdpy, xwin, &attrs)) {
printf("XGetWindowAttributes() failed\n");
return EGL_FALSE;
}
eman->xpix = XCreatePixmap(eman->xdpy, xwin,
attrs.width, attrs.height, attrs.depth);
if (need_surface) {
eman->pix = eglCreatePixmapSurface(eman->dpy, eman->conf,
eman->xpix, attrib_list);
if (eman->pix == EGL_NO_SURFACE) {
printf("eglCreatePixmapSurface() failed\n");
XFreePixmap(eman->xdpy, eman->xpix);
eman->xpix = None;
return EGL_FALSE;
}
}
return EGL_TRUE;
}
static EGLBoolean
egl_manager_create_pbuffer(struct egl_manager *eman, const EGLint *attrib_list)
{
eman->pbuf = eglCreatePbufferSurface(eman->dpy, eman->conf, attrib_list);
if (eman->pbuf == EGL_NO_SURFACE) {
printf("eglCreatePbufferSurface() failed\n");
return EGL_FALSE;
}
return EGL_TRUE;
}
static void
egl_manager_destroy(struct egl_manager *eman)
{
eglMakeCurrent(eman->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglTerminate(eman->dpy);
if (eman->xwin != None)
XDestroyWindow(eman->xdpy, eman->xwin);
if (eman->xpix != None)
XFreePixmap(eman->xdpy, eman->xpix);
XFreeGC(eman->xdpy, eman->gc);
free(eman);
}
enum {
GEARS_WINDOW,
GEARS_PIXMAP,
GEARS_PIXMAP_TEXTURE,
GEARS_PBUFFER,
GEARS_PBUFFER_TEXTURE,
GEARS_RENDERBUFFER
};
static void
texture_gears(struct egl_manager *eman, int surface_type)
{
static const GLint verts[12] =
{ -5, -6, -10, 5, -6, -10, -5, 4, 10, 5, 4, 10 };
static const GLint tex_coords[8] = { 0, 0, 1, 0, 0, 1, 1, 1 };
eglMakeCurrent(eman->dpy, eman->win, eman->win, eman->ctx);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(3, GL_INT, 0, verts);
glTexCoordPointer(2, GL_INT, 0, tex_coords);
if (surface_type == GEARS_PBUFFER_TEXTURE)
eglBindTexImage(eman->dpy, eman->pbuf, EGL_BACK_BUFFER);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glDisable(GL_TEXTURE_2D);
if (surface_type == GEARS_PBUFFER_TEXTURE)
eglReleaseTexImage(eman->dpy, eman->pbuf, EGL_BACK_BUFFER);
eglSwapBuffers(eman->dpy, eman->win);
}
static void
copy_gears(struct egl_manager *eman,
EGLint tile_w, EGLint tile_h, EGLint w, EGLint h)
{
int x, y;
eglWaitClient();
for (x = 0; x < w; x += tile_w) {
for (y = 0; y < h; y += tile_h) {
XCopyArea(eman->xdpy, eman->xpix, eman->xwin, eman->gc,
0, 0, tile_w, tile_h, x, y);
}
}
}
static void
event_loop(struct egl_manager *eman, EGLint surface_type, EGLint w, EGLint h)
{
int window_w = w, window_h = h;
if (surface_type == EGL_PBUFFER_BIT)
printf("there will be no screen update if "
"eglCopyBuffers() is not implemented\n");
while (1) {
while (XPending(eman->xdpy) > 0) {
XEvent event;
XNextEvent(eman->xdpy, &event);
switch (event.type) {
case Expose:
/* we'll redraw below */
break;
case ConfigureNotify:
window_w = event.xconfigure.width;
window_h = event.xconfigure.height;
if (surface_type == EGL_WINDOW_BIT)
reshape(window_w, window_h);
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] == 27) {
/* escape */
return;
}
}
}
}
}
{
static int frames = 0;
static double tRot0 = -1.0, tRate0 = -1.0;
double dt, t = current_time();
if (tRot0 < 0.0)
tRot0 = t;
dt = t - tRot0;
tRot0 = t;
/* advance rotation for next frame */
angle += 70.0 * dt; /* 70 degrees per second */
if (angle > 3600.0)
angle -= 3600.0;
switch (surface_type) {
case GEARS_WINDOW:
draw();
eglSwapBuffers(eman->dpy, eman->win);
break;
case GEARS_PBUFFER:
draw();
if (!eglCopyBuffers(eman->dpy, eman->pbuf, eman->xpix))
break;
copy_gears(eman, w, h, window_w, window_h);
break;
case GEARS_PBUFFER_TEXTURE:
eglMakeCurrent(eman->dpy, eman->pbuf, eman->pbuf, eman->ctx);
draw();
texture_gears(eman, surface_type);
break;
case GEARS_PIXMAP:
draw();
copy_gears(eman, w, h, window_w, window_h);
break;
case GEARS_PIXMAP_TEXTURE:
eglMakeCurrent(eman->dpy, eman->pix, eman->pix, eman->ctx);
draw();
texture_gears(eman, surface_type);
break;
case GEARS_RENDERBUFFER:
glBindFramebuffer(GL_FRAMEBUFFER_EXT, eman->fbo);
draw();
glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
texture_gears(eman, surface_type);
break;
}
frames++;
if (tRate0 < 0.0)
tRate0 = t;
if (t - tRate0 >= 5.0) {
GLfloat seconds = t - tRate0;
GLfloat fps = frames / seconds;
printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
fps);
tRate0 = t;
frames = 0;
}
}
}
}
static void
usage(void)
{
printf("Usage:\n");
printf(" -display <displayname> set the display to run on\n");
printf(" -fullscreen run in fullscreen mode\n");
printf(" -info display OpenGL renderer info\n");
printf(" -pixmap use pixmap surface\n");
printf(" -pixmap-texture use pixmap surface and texture using EGLImage\n");
printf(" -pbuffer use pbuffer surface and eglCopyBuffers\n");
printf(" -pbuffer-texture use pbuffer surface and eglBindTexImage\n");
printf(" -renderbuffer renderbuffer as EGLImage and bind as texture from\n");
}
static const char *names[] = {
"window",
"pixmap",
"pixmap_texture",
"pbuffer",
"pbuffer_texture",
"renderbuffer"
};
int
main(int argc, char *argv[])
{
const int winWidth = 300, winHeight = 300;
Display *x_dpy;
char *dpyName = NULL;
struct egl_manager *eman;
EGLint attribs[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT, /* may be changed later */
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_DEPTH_SIZE, 1,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
char win_title[] = "xeglgears (window/pixmap/pbuffer)";
EGLint surface_type = GEARS_WINDOW;
GLboolean printInfo = GL_FALSE;
GLboolean fullscreen = GL_FALSE;
EGLBoolean ret;
GLuint texture, color_rb, depth_rb;
int i;
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 if (strcmp(argv[i], "-fullscreen") == 0) {
fullscreen = GL_TRUE;
}
else if (strcmp(argv[i], "-pixmap") == 0) {
surface_type = GEARS_PIXMAP;
attribs[1] = EGL_PIXMAP_BIT;
}
else if (strcmp(argv[i], "-pixmap-texture") == 0) {
surface_type = GEARS_PIXMAP_TEXTURE;
attribs[1] = EGL_PIXMAP_BIT;
}
else if (strcmp(argv[i], "-pbuffer") == 0) {
surface_type = GEARS_PBUFFER;
attribs[1] = EGL_PBUFFER_BIT;
}
else if (strcmp(argv[i], "-pbuffer-texture") == 0) {
surface_type = GEARS_PBUFFER_TEXTURE;
attribs[1] = EGL_PBUFFER_BIT;
}
else if (strcmp(argv[i], "-renderbuffer") == 0) {
surface_type = GEARS_RENDERBUFFER;
}
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;
}
eglBindAPI(EGL_OPENGL_API);
eman = egl_manager_new(x_dpy, attribs, printInfo);
if (!eman) {
XCloseDisplay(x_dpy);
return -1;
}
snprintf(win_title, sizeof(win_title),
"xeglgears (%s)", names[surface_type]);
ret = egl_manager_create_window(eman, win_title, winWidth, winHeight,
EGL_TRUE, fullscreen, NULL);
if (!ret)
return -1;
/* create surface(s) */
switch (surface_type) {
case GEARS_WINDOW:
if (ret)
ret = eglMakeCurrent(eman->dpy, eman->win, eman->win, eman->ctx);
break;
case GEARS_PIXMAP:
case GEARS_PIXMAP_TEXTURE:
ret = egl_manager_create_pixmap(eman, eman->xwin, EGL_TRUE, NULL);
if (surface_type == GEARS_PIXMAP_TEXTURE)
eman->image = eglCreateImageKHR (eman->dpy, eman->ctx,
EGL_NATIVE_PIXMAP_KHR,
(EGLClientBuffer) eman->xpix, NULL);
if (ret)
ret = eglMakeCurrent(eman->dpy, eman->pix, eman->pix, eman->ctx);
break;
case GEARS_PBUFFER:
case GEARS_PBUFFER_TEXTURE:
{
EGLint pbuf_attribs[] = {
EGL_WIDTH, winWidth,
EGL_HEIGHT, winHeight,
EGL_TEXTURE_FORMAT, EGL_TEXTURE_RGB,
EGL_TEXTURE_TARGET, EGL_TEXTURE_2D,
EGL_NONE
};
ret = (egl_manager_create_pixmap(eman, eman->xwin,
EGL_TRUE, NULL) &&
egl_manager_create_pbuffer(eman, pbuf_attribs));
if (ret)
ret = eglMakeCurrent(eman->dpy, eman->pbuf, eman->pbuf, eman->ctx);
}
break;
case GEARS_RENDERBUFFER:
ret = eglMakeCurrent(eman->dpy, eman->win, eman->win, eman->ctx);
if (ret == EGL_FALSE)
printf("failed to make context current\n");
glGenFramebuffers(1, &eman->fbo);
glBindFramebuffer(GL_FRAMEBUFFER_EXT, eman->fbo);
glGenRenderbuffers(1, &color_rb);
glBindRenderbuffer(GL_RENDERBUFFER_EXT, color_rb);
glRenderbufferStorage(GL_RENDERBUFFER_EXT, GL_RGBA, winWidth, winHeight);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT,
color_rb);
eman->image = eglCreateImageKHR(eman->dpy, eman->ctx,
EGL_GL_RENDERBUFFER_KHR,
(EGLClientBuffer) color_rb, NULL);
glGenRenderbuffers(1, &depth_rb);
glBindRenderbuffer(GL_RENDERBUFFER_EXT, depth_rb);
glRenderbufferStorage(GL_RENDERBUFFER_EXT,
GL_DEPTH_COMPONENT, winWidth, winHeight);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT,
depth_rb);
if (glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE) {
printf("framebuffer not complete\n");
exit(1);
}
break;
default:
ret = EGL_FALSE;
break;
}
switch (surface_type) {
case GEARS_PIXMAP_TEXTURE:
case GEARS_RENDERBUFFER:
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, eman->image);
break;
case GEARS_PBUFFER_TEXTURE:
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
break;
}
if (!ret) {
egl_manager_destroy(eman);
XCloseDisplay(x_dpy);
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));
}
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(eman, surface_type, winWidth, winHeight);
glDeleteLists(gear1, 1);
glDeleteLists(gear2, 1);
glDeleteLists(gear3, 1);
egl_manager_destroy(eman);
XCloseDisplay(x_dpy);
return 0;
}