428 lines
10 KiB
C
428 lines
10 KiB
C
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/*
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* Copyright (C) 2008 Tunsgten Graphics,Inc. All Rights Reserved.
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*/
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/*
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* Test GL_OES_draw_texture
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* Brian Paul
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* August 2008
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*/
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#define GL_GLEXT_PROTOTYPES
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/keysym.h>
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#include <GLES/gl.h>
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#include <GLES/glext.h>
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#include <EGL/egl.h>
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static GLfloat view_posx = 10.0, view_posy = 20.0;
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static GLfloat width = 200, height = 200;
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static void
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draw(void)
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{
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glClear(GL_COLOR_BUFFER_BIT);
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glDrawTexfOES(view_posx, view_posy, 0.0, width, height);
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}
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/* new window size or exposure */
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static void
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reshape(int width, int height)
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{
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GLfloat ar = (GLfloat) width / (GLfloat) height;
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glViewport(0, 0, (GLint) width, (GLint) height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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#ifdef GL_VERSION_ES_CM_1_0
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glFrustumf(-ar, ar, -1, 1, 5.0, 60.0);
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#else
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glFrustum(-ar, ar, -1, 1, 5.0, 60.0);
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#endif
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0.0, 0.0, -15.0);
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}
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static float
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dist(GLuint i, GLuint j, float x, float y)
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{
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return sqrt((i-x) * (i-x) + (j-y) * (j-y));
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}
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static void
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make_smile_texture(void)
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{
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#define SZ 128
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GLenum Filter = GL_LINEAR;
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GLubyte image[SZ][SZ][4];
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GLuint i, j;
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GLint cropRect[4];
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for (i = 0; i < SZ; i++) {
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for (j = 0; j < SZ; j++) {
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GLfloat d_mouth = dist(i, j, SZ/2, SZ/2);
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GLfloat d_rt_eye = dist(i, j, SZ*3/4, SZ*3/4);
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GLfloat d_lt_eye = dist(i, j, SZ*3/4, SZ*1/4);
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if (d_rt_eye < SZ / 8 || d_lt_eye < SZ / 8) {
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image[i][j][0] = 20;
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image[i][j][1] = 50;
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image[i][j][2] = 255;
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image[i][j][3] = 255;
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}
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else if (i < SZ/2 && d_mouth < SZ/3) {
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image[i][j][0] = 255;
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image[i][j][1] = 20;
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image[i][j][2] = 20;
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image[i][j][3] = 255;
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}
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else {
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image[i][j][0] = 200;
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image[i][j][1] = 200;
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image[i][j][2] = 200;
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image[i][j][3] = 255;
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}
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}
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}
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glActiveTexture(GL_TEXTURE0); /* unit 0 */
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glBindTexture(GL_TEXTURE_2D, 42);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SZ, SZ, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, image);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, Filter);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, Filter);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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cropRect[0] = 0;
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cropRect[1] = 0;
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cropRect[2] = SZ;
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cropRect[3] = SZ;
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glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, cropRect);
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#undef SZ
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}
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static void
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init(void)
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{
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const char *ext = (char *) glGetString(GL_EXTENSIONS);
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if (!strstr(ext, "GL_OES_draw_texture")) {
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fprintf(stderr, "Sorry, this program requires GL_OES_draw_texture");
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exit(1);
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}
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glClearColor(0.4, 0.4, 0.4, 0.0);
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make_smile_texture();
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glEnable(GL_TEXTURE_2D);
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}
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/*
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* Create an RGB, double-buffered X window.
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* Return the window and context handles.
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*/
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static void
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make_x_window(Display *x_dpy, EGLDisplay egl_dpy,
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const char *name,
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int x, int y, int width, int height,
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Window *winRet,
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EGLContext *ctxRet,
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EGLSurface *surfRet)
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{
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static const EGLint attribs[] = {
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EGL_RED_SIZE, 1,
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EGL_GREEN_SIZE, 1,
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EGL_BLUE_SIZE, 1,
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EGL_NONE
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};
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int scrnum;
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XSetWindowAttributes attr;
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unsigned long mask;
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Window root;
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Window win;
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XVisualInfo *visInfo, visTemplate;
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int num_visuals;
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EGLContext ctx;
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EGLConfig config;
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EGLint num_configs;
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EGLint vid;
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scrnum = DefaultScreen( x_dpy );
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root = RootWindow( x_dpy, scrnum );
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if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs)) {
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printf("Error: couldn't get an EGL visual config\n");
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exit(1);
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}
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assert(config);
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assert(num_configs > 0);
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if (!eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) {
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printf("Error: eglGetConfigAttrib() failed\n");
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exit(1);
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}
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/* The X window visual must match the EGL config */
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visTemplate.visualid = vid;
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visInfo = XGetVisualInfo(x_dpy, VisualIDMask, &visTemplate, &num_visuals);
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if (!visInfo) {
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printf("Error: couldn't get X visual\n");
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exit(1);
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}
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/* window attributes */
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attr.background_pixel = 0;
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attr.border_pixel = 0;
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attr.colormap = XCreateColormap( x_dpy, root, visInfo->visual, AllocNone);
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attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
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mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
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win = XCreateWindow( x_dpy, root, 0, 0, width, height,
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0, visInfo->depth, InputOutput,
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visInfo->visual, mask, &attr );
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/* set hints and properties */
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{
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XSizeHints sizehints;
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sizehints.x = x;
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sizehints.y = y;
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sizehints.width = width;
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sizehints.height = height;
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sizehints.flags = USSize | USPosition;
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XSetNormalHints(x_dpy, win, &sizehints);
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XSetStandardProperties(x_dpy, win, name, name,
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None, (char **)NULL, 0, &sizehints);
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}
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eglBindAPI(EGL_OPENGL_ES_API);
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ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, NULL );
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if (!ctx) {
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printf("Error: eglCreateContext failed\n");
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exit(1);
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}
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*surfRet = eglCreateWindowSurface(egl_dpy, config, win, NULL);
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if (!*surfRet) {
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printf("Error: eglCreateWindowSurface failed\n");
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exit(1);
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}
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XFree(visInfo);
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*winRet = win;
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*ctxRet = ctx;
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}
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static void
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event_loop(Display *dpy, Window win,
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EGLDisplay egl_dpy, EGLSurface egl_surf)
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{
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int anim = 0;
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while (1) {
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int redraw = 0;
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if (!anim || XPending(dpy)) {
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XEvent event;
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XNextEvent(dpy, &event);
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switch (event.type) {
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case Expose:
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redraw = 1;
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break;
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case ConfigureNotify:
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reshape(event.xconfigure.width, event.xconfigure.height);
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break;
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case KeyPress:
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{
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char buffer[10];
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int r, code;
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code = XLookupKeysym(&event.xkey, 0);
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if (code == XK_Left) {
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view_posx -= 1.0;
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}
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else if (code == XK_Right) {
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view_posx += 1.0;
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}
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else if (code == XK_Up) {
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view_posy += 1.0;
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}
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else if (code == XK_Down) {
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view_posy -= 1.0;
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}
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else {
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r = XLookupString(&event.xkey, buffer, sizeof(buffer),
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NULL, NULL);
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if (buffer[0] == ' ') {
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anim = !anim;
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}
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else if (buffer[0] == 'w') {
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width -= 1.0f;
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}
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else if (buffer[0] == 'W') {
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width += 1.0f;
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}
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else if (buffer[0] == 'h') {
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height -= 1.0f;
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}
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else if (buffer[0] == 'H') {
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height += 1.0f;
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}
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else if (buffer[0] == 27) {
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/* escape */
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return;
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}
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}
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}
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redraw = 1;
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break;
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default:
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; /*no-op*/
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}
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}
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if (anim) {
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view_posx += 1.0;
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view_posy += 2.0;
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redraw = 1;
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}
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if (redraw) {
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draw();
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eglSwapBuffers(egl_dpy, egl_surf);
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}
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}
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}
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static void
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usage(void)
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{
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printf("Usage:\n");
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printf(" -display <displayname> set the display to run on\n");
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printf(" -info display OpenGL renderer info\n");
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}
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int
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main(int argc, char *argv[])
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{
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const int winWidth = 400, winHeight = 300;
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Display *x_dpy;
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Window win;
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EGLSurface egl_surf;
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EGLContext egl_ctx;
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EGLDisplay egl_dpy;
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char *dpyName = NULL;
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GLboolean printInfo = GL_FALSE;
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EGLint egl_major, egl_minor;
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int i;
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const char *s;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-display") == 0) {
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dpyName = argv[i+1];
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i++;
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}
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else if (strcmp(argv[i], "-info") == 0) {
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printInfo = GL_TRUE;
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}
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else {
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usage();
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return -1;
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}
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}
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x_dpy = XOpenDisplay(dpyName);
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if (!x_dpy) {
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printf("Error: couldn't open display %s\n",
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dpyName ? dpyName : getenv("DISPLAY"));
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return -1;
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}
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egl_dpy = eglGetDisplay(x_dpy);
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if (!egl_dpy) {
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printf("Error: eglGetDisplay() failed\n");
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return -1;
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}
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if (!eglInitialize(egl_dpy, &egl_major, &egl_minor)) {
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printf("Error: eglInitialize() failed\n");
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return -1;
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}
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s = eglQueryString(egl_dpy, EGL_VERSION);
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printf("EGL_VERSION = %s\n", s);
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s = eglQueryString(egl_dpy, EGL_VENDOR);
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printf("EGL_VENDOR = %s\n", s);
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s = eglQueryString(egl_dpy, EGL_EXTENSIONS);
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printf("EGL_EXTENSIONS = %s\n", s);
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s = eglQueryString(egl_dpy, EGL_CLIENT_APIS);
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printf("EGL_CLIENT_APIS = %s\n", s);
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make_x_window(x_dpy, egl_dpy,
|
||
|
|
"drawtex", 0, 0, winWidth, winHeight,
|
||
|
|
&win, &egl_ctx, &egl_surf);
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
eglDestroyContext(egl_dpy, egl_ctx);
|
||
|
|
eglDestroySurface(egl_dpy, egl_surf);
|
||
|
|
eglTerminate(egl_dpy);
|
||
|
|
|
||
|
|
|
||
|
|
XDestroyWindow(x_dpy, win);
|
||
|
|
XCloseDisplay(x_dpy);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|