progs/perf/glmain.c

   1 /*
   2  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 /**
  23  * OpenGL/GLUT common code for perf programs.
  24  * Brian Paul
  25  * 15 Sep 2009
  26  */
  27
  28
  29 #include <stdio.h>
  30 #include "glmain.h"
  31 #include <GL/glut.h>
  32
  33
  34 static int Win;
  35 static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
  36
  37
  38 /** Return time in seconds */
  39 double
  40 PerfGetTime(void)
  41 {
  42    return glutGet(GLUT_ELAPSED_TIME) * 0.001;
  43 }
  44
  45
  46 void
  47 PerfSwapBuffers(void)
  48 {
  49    glutSwapBuffers();
  50 }
  51
  52
  53 /** make simple checkerboard texture object */
  54 GLuint
  55 PerfCheckerTexture(GLsizei width, GLsizei height)
  56 {
  57    const GLenum filter = GL_NEAREST;
  58    GLubyte *img = (GLubyte *) malloc(width * height * 4);
  59    GLint i, j, k;
  60    GLuint obj;
  61
  62    k = 0;
  63    for (i = 0; i < height; i++) {
  64       for (j = 0; j < width; j++) {
  65          GLubyte color;
  66          if (((i / 8) ^ (j / 8)) & 1) {
  67             color = 0xff;
  68          }
  69          else {
  70             color = 0x0;
  71          }
  72          img[k++] = color;
  73          img[k++] = color;
  74          img[k++] = color;
  75          img[k++] = color;
  76       }
  77    }
  78
  79    glGenTextures(1, &obj);
  80    glBindTexture(GL_TEXTURE_2D, obj);
  81    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
  82    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
  83    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
  84                 GL_RGBA, GL_UNSIGNED_BYTE, img);
  85    free(img);
  86
  87    return obj;
  88 }
  89
  90
  91 static GLuint
  92 CompileShader(GLenum type, const char *shader)
  93 {
  94    GLuint sh;
  95    GLint stat;
  96
  97    sh = glCreateShader(type);
  98    glShaderSource(sh, 1, (const GLchar **) &shader, NULL);
  99
 100    glCompileShader(sh);
 101
 102    glGetShaderiv(sh, GL_COMPILE_STATUS, &stat);
 103    if (!stat) {
 104       GLchar log[1000];
 105       GLsizei len;
 106       glGetShaderInfoLog(sh, 1000, &len, log);
 107       fprintf(stderr, "Error: problem compiling shader: %s\n", log);
 108       exit(1);
 109    }
 110
 111    return sh;
 112 }
 113
 114
 115 /** Make shader program from given vert/frag shader text */
 116 GLuint
 117 PerfShaderProgram(const char *vertShader, const char *fragShader)
 118 {
 119    GLuint prog;
 120    GLint stat;
 121
 122    {
 123       const char *version = (const char *) glGetString(GL_VERSION);
 124       if ((version[0] != '2' &&
 125            version[0] != '3') || version[1] != '.') {
 126          fprintf(stderr, "Error: GL version 2.x or better required\n");
 127          exit(1);
 128       }
 129    }
 130
 131    prog = glCreateProgram();
 132
 133    if (vertShader) {
 134       GLuint vs = CompileShader(GL_VERTEX_SHADER, vertShader);
 135       glAttachShader(prog, vs);
 136    }
 137    if (fragShader) {
 138       GLuint fs = CompileShader(GL_FRAGMENT_SHADER, fragShader);
 139       glAttachShader(prog, fs);
 140    }
 141
 142    glLinkProgram(prog);
 143    glGetProgramiv(prog, GL_LINK_STATUS, &stat);
 144    if (!stat) {
 145       GLchar log[1000];
 146       GLsizei len;
 147       glGetProgramInfoLog(prog, 1000, &len, log);
 148       fprintf(stderr, "Shader link error:\n%s\n", log);
 149       exit(1);
 150    }
 151
 152    return prog;
 153 }
 154
 155
 156 int
 157 PerfReshapeWindow( unsigned w, unsigned h )
 158 {
 159    if (glutGet(GLUT_SCREEN_WIDTH) < w ||
 160        glutGet(GLUT_SCREEN_HEIGHT) < h)
 161       return 0;
 162
 163    glutReshapeWindow( w, h );
 164    glutPostRedisplay();
 165    return 1;
 166 }
 167
 168
 169 GLboolean
 170 PerfExtensionSupported(const char *ext)
 171 {
 172    return glutExtensionSupported(ext);
 173 }
 174
 175
 176 static void
 177 Idle(void)
 178 {
 179    PerfNextRound();
 180 }
 181
 182
 183 static void
 184 Draw(void)
 185 {
 186    PerfDraw();
 187    glutSwapBuffers();
 188 }
 189
 190
 191 static void
 192 Reshape(int width, int height)
 193 {
 194    WinWidth = width;
 195    WinHeight = height;
 196    glViewport(0, 0, width, height);
 197    glMatrixMode(GL_PROJECTION);
 198    glLoadIdentity();
 199    glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
 200    glMatrixMode(GL_MODELVIEW);
 201    glLoadIdentity();
 202    glTranslatef(0.0, 0.0, -15.0);
 203 }
 204
 205
 206 static void
 207 Key(unsigned char key, int x, int y)
 208 {
 209    const GLfloat step = 3.0;
 210    (void) x;
 211    (void) y;
 212    switch (key) {
 213    case 'z':
 214       Zrot -= step;
 215       break;
 216    case 'Z':
 217       Zrot += step;
 218       break;
 219    case 27:
 220       glutDestroyWindow(Win);
 221       exit(0);
 222       break;
 223    }
 224    glutPostRedisplay();
 225 }
 226
 227
 228 static void
 229 SpecialKey(int key, int x, int y)
 230 {
 231    const GLfloat step = 3.0;
 232    (void) x;
 233    (void) y;
 234    switch (key) {
 235    case GLUT_KEY_UP:
 236       Xrot -= step;
 237       break;
 238    case GLUT_KEY_DOWN:
 239       Xrot += step;
 240       break;
 241    case GLUT_KEY_LEFT:
 242       Yrot -= step;
 243       break;
 244    case GLUT_KEY_RIGHT:
 245       Yrot += step;
 246       break;
 247    }
 248    glutPostRedisplay();
 249 }
 250
 251
 252 int
 253 main(int argc, char *argv[])
 254 {
 255    glutInit(&argc, argv);
 256    glutInitWindowSize(WinWidth, WinHeight);
 257    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL);
 258    Win = glutCreateWindow(argv[0]);
 259    glewInit();
 260    glutReshapeFunc(Reshape);
 261    glutKeyboardFunc(Key);
 262    glutSpecialFunc(SpecialKey);
 263    glutDisplayFunc(Draw);
 264    glutIdleFunc(Idle);
 265    PerfInit();
 266    glutMainLoop();
 267    return 0;
 268 }