7f231cab2b
Move progs/es1/xegl -> progs/egl/opengles1, progs/es1/screen -> progs/egl/opengles1/screen, progs/es2/xegl -> progs/egl/opengles2.
660 lines
16 KiB
C
660 lines
16 KiB
C
/*
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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 EGL render to texture.
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* Brian Paul
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* August 2008
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*/
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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 int TexWidth = 256, TexHeight = 256;
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static int WinWidth = 300, WinHeight = 300;
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static GLfloat view_rotx = 0.0, view_roty = 0.0, view_rotz = 0.0;
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static GLuint DotTexture, RenderTexture;
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static void
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Normal(GLfloat *n, GLfloat nx, GLfloat ny, GLfloat nz)
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{
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n[0] = nx;
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n[1] = ny;
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n[2] = nz;
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}
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static void
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Vertex(GLfloat *v, GLfloat vx, GLfloat vy, GLfloat vz)
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{
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v[0] = vx;
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v[1] = vy;
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v[2] = vz;
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}
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static void
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Texcoord(GLfloat *v, GLfloat s, GLfloat t)
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{
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v[0] = s;
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v[1] = t;
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}
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/* Borrowed from glut, adapted */
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static void
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draw_torus(GLfloat r, GLfloat R, GLint nsides, GLint rings)
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{
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int i, j;
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GLfloat theta, phi, theta1;
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GLfloat cosTheta, sinTheta;
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GLfloat cosTheta1, sinTheta1;
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GLfloat ringDelta, sideDelta;
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GLfloat varray[100][3], narray[100][3], tarray[100][2];
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int vcount;
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glVertexPointer(3, GL_FLOAT, 0, varray);
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glNormalPointer(GL_FLOAT, 0, narray);
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glTexCoordPointer(2, GL_FLOAT, 0, tarray);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_NORMAL_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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ringDelta = 2.0 * M_PI / rings;
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sideDelta = 2.0 * M_PI / nsides;
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theta = 0.0;
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cosTheta = 1.0;
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sinTheta = 0.0;
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for (i = rings - 1; i >= 0; i--) {
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theta1 = theta + ringDelta;
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cosTheta1 = cos(theta1);
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sinTheta1 = sin(theta1);
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vcount = 0; /* glBegin(GL_QUAD_STRIP); */
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phi = 0.0;
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for (j = nsides; j >= 0; j--) {
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GLfloat s0, s1, t;
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GLfloat cosPhi, sinPhi, dist;
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phi += sideDelta;
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cosPhi = cos(phi);
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sinPhi = sin(phi);
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dist = R + r * cosPhi;
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s0 = 20.0 * theta / (2.0 * M_PI);
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s1 = 20.0 * theta1 / (2.0 * M_PI);
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t = 8.0 * phi / (2.0 * M_PI);
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Normal(narray[vcount], cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
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Texcoord(tarray[vcount], s1, t);
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Vertex(varray[vcount], cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
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vcount++;
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Normal(narray[vcount], cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
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Texcoord(tarray[vcount], s0, t);
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Vertex(varray[vcount], cosTheta * dist, -sinTheta * dist, r * sinPhi);
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vcount++;
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}
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/*glEnd();*/
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assert(vcount <= 100);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, vcount);
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theta = theta1;
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cosTheta = cosTheta1;
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sinTheta = sinTheta1;
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}
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_NORMAL_ARRAY);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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}
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static void
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draw_torus_to_texture(void)
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{
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glViewport(0, 0, TexWidth, TexHeight);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustumf(-1, 1, -1, 1, 5.0, 60.0);
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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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glClearColor(0.4, 0.4, 0.4, 0.0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glBindTexture(GL_TEXTURE_2D, DotTexture);
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glEnable(GL_LIGHTING);
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glPushMatrix();
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glRotatef(view_roty, 0, 1, 0);
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glScalef(0.5, 0.5, 0.5);
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draw_torus(1.0, 3.0, 30, 60);
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glPopMatrix();
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glDisable(GL_LIGHTING);
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#if 0
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glBindTexture(GL_TEXTURE_2D, RenderTexture);
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glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TexWidth, TexHeight);
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#endif
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glFinish();
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}
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static void
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draw_textured_quad(void)
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{
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GLfloat ar = (GLfloat) WinWidth / (GLfloat) WinHeight;
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glViewport(0, 0, WinWidth, WinHeight);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustumf(-ar, ar, -1, 1, 5.0, 60.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0.0, 0.0, -8.0);
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glClearColor(0.4, 0.4, 1.0, 0.0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glBindTexture(GL_TEXTURE_2D, RenderTexture);
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glPushMatrix();
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glRotatef(view_rotx, 1, 0, 0);
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glRotatef(view_rotz, 0, 0, 1);
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{
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static const GLfloat texcoord[4][2] = {
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{ 0, 0 }, { 1, 0 }, { 0, 1 }, { 1, 1 }
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};
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static const GLfloat vertex[4][2] = {
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{ -1, -1 }, { 1, -1 }, { -1, 1 }, { 1, 1 }
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};
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glVertexPointer(2, GL_FLOAT, 0, vertex);
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glTexCoordPointer(2, GL_FLOAT, 0, texcoord);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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}
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glPopMatrix();
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}
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static void
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draw(EGLDisplay egl_dpy, EGLSurface egl_surf, EGLSurface egl_pbuf,
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EGLContext egl_ctx)
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{
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/*printf("Begin draw\n");*/
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/* first draw torus to pbuffer /texture */
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#if 01
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if (!eglMakeCurrent(egl_dpy, egl_pbuf, egl_pbuf, egl_ctx)) {
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#else
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if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
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#endif
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printf("Error: eglMakeCurrent(pbuf) failed\n");
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return;
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}
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draw_torus_to_texture();
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/* draw textured quad to window */
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if (!eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx)) {
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printf("Error: eglMakeCurrent(pbuffer) failed\n");
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return;
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}
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glBindTexture(GL_TEXTURE_2D, RenderTexture);
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eglBindTexImage(egl_dpy, egl_pbuf, EGL_BACK_BUFFER);
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draw_textured_quad();
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eglReleaseTexImage(egl_dpy, egl_pbuf, EGL_BACK_BUFFER);
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eglSwapBuffers(egl_dpy, egl_surf);
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/*printf("End draw\n");*/
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}
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static void
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make_dot_texture(void)
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{
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#define SZ 64
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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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for (i = 0; i < SZ; i++) {
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for (j = 0; j < SZ; j++) {
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GLfloat d = (i - SZ/2) * (i - SZ/2) + (j - SZ/2) * (j - SZ/2);
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d = sqrt(d);
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if (d < SZ/3) {
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image[i][j][0] = 255;
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image[i][j][1] = 255;
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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 {
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image[i][j][0] = 127;
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image[i][j][1] = 127;
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image[i][j][2] = 127;
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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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glGenTextures(1, &DotTexture);
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glBindTexture(GL_TEXTURE_2D, DotTexture);
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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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#undef SZ
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}
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static void
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make_render_texture(void)
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{
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GLenum Filter = GL_LINEAR;
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glGenTextures(1, &RenderTexture);
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glBindTexture(GL_TEXTURE_2D, RenderTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TexWidth, TexHeight, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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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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}
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static void
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init(void)
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{
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static const GLfloat red[4] = {1, 0, 0, 0};
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static const GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
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static const GLfloat diffuse[4] = {0.7, 0.7, 0.7, 1.0};
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static const GLfloat specular[4] = {0.001, 0.001, 0.001, 1.0};
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static const GLfloat pos[4] = {20, 20, 50, 1};
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glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
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glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, white);
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glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 9.0);
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glEnable(GL_LIGHT0);
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glLightfv(GL_LIGHT0, GL_POSITION, pos);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
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glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
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glEnable(GL_DEPTH_TEST);
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make_dot_texture();
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make_render_texture();
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printf("DotTexture=%u RenderTexture=%u\n", DotTexture, RenderTexture);
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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_DEPTH_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 EGLSurface
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make_pbuffer(Display *x_dpy, EGLDisplay egl_dpy, int width, int height)
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{
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static const EGLint config_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_DEPTH_SIZE, 1,
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EGL_NONE
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};
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EGLConfig config;
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EGLSurface pbuf;
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EGLint num_configs;
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EGLint pbuf_attribs[15];
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int i = 0;
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pbuf_attribs[i++] = EGL_WIDTH;
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pbuf_attribs[i++] = width;
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pbuf_attribs[i++] = EGL_HEIGHT;
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pbuf_attribs[i++] = height;
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pbuf_attribs[i++] = EGL_TEXTURE_FORMAT;
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pbuf_attribs[i++] = EGL_TEXTURE_RGBA;
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pbuf_attribs[i++] = EGL_TEXTURE_TARGET;
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pbuf_attribs[i++] = EGL_TEXTURE_2D;
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pbuf_attribs[i++] = EGL_MIPMAP_TEXTURE;
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pbuf_attribs[i++] = EGL_FALSE;
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pbuf_attribs[i++] = EGL_NONE;
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assert(i <= 15);
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if (!eglChooseConfig( egl_dpy, config_attribs, &config, 1, &num_configs)) {
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printf("Error: couldn't get an EGL config for pbuffer\n");
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exit(1);
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}
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pbuf = eglCreatePbufferSurface(egl_dpy, config, pbuf_attribs);
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return pbuf;
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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, EGLSurface egl_pbuf,
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EGLContext egl_ctx)
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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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if (event.xconfigure.window == win) {
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WinWidth = event.xconfigure.width;
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WinHeight = event.xconfigure.height;
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}
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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_roty += 5.0;
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}
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else if (code == XK_Right) {
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view_roty -= 5.0;
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}
|
|
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] == 'z') {
|
|
view_rotz += 5.0;
|
|
}
|
|
else if (buffer[0] == 'Z') {
|
|
view_rotz -= 5.0;
|
|
}
|
|
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(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,
|
|
"render_tex", 0, 0, WinWidth, WinHeight,
|
|
&win, &egl_ctx, &egl_surf);
|
|
|
|
egl_pbuf = make_pbuffer(x_dpy, egl_dpy, TexWidth, TexHeight);
|
|
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();
|
|
|
|
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;
|
|
}
|