progs/tests/cva_huge.c

   1 /*
   2  * Copyright © 2010 Pauli Nieminen
   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 (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24
  25 /*
  26  * Test case for huge cva arrays. Mesa code has to split this to multiple VBOs
  27  * which had memory access error.
  28  * This test case doesn't render incorrectly but valgrind showed the memory
  29  * access error.
  30  */
  31
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <stddef.h>     /* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */
  36 #ifdef _WIN32
  37 #include <windows.h>
  38 #endif
  39 #define GL_GLEXT_LEGACY
  40 #include <GL/glut.h>
  41
  42 GLfloat *verts;
  43
  44 GLubyte *color;
  45
  46 GLuint *indices;
  47
  48 #define rows 1000 /* Create 1000x1000 vertex grid */
  49 #define row_width 5000.0
  50 #define grid_depth -50.0
  51 GLuint nr_verts_in_row = rows;
  52 GLuint nr_indices_in_strip = rows * 2;
  53
  54 GLboolean double_buffer;
  55 GLboolean compiled = GL_TRUE;
  56
  57 static void generate_verts( void )
  58 {
  59         unsigned x, y;
  60         GLfloat step = row_width /(GLfloat)(nr_verts_in_row - 1);
  61         verts = malloc(sizeof(verts[0]) * 4 * nr_verts_in_row * nr_verts_in_row);
  62
  63         for (y = 0; y < nr_verts_in_row; ++y) {
  64                 for (x = 0; x < nr_verts_in_row; ++x) {
  65                         unsigned idx = 4*(x + y * nr_verts_in_row);
  66                         verts[idx + 0] = step * x - row_width/2.0;
  67                         verts[idx + 1] = step * y - row_width/2.0;
  68                         /* deep enough not to be vissible */
  69                         verts[idx + 2] = grid_depth;
  70                         verts[idx + 3] = 0.0;
  71                 }
  72         }
  73         glVertexPointer( 3, GL_FLOAT, sizeof(verts[0])*4, verts );
  74 }
  75
  76 static void generate_colors( void )
  77 {
  78         unsigned x, y;
  79         GLfloat step = 255.0/(GLfloat)(nr_verts_in_row - 1);
  80         color = malloc(sizeof(color[0]) * 4 * nr_verts_in_row * nr_verts_in_row);
  81
  82         for (y = 0; y < nr_verts_in_row; ++y) {
  83                 for (x = 0; x < nr_verts_in_row; ++x) {
  84                         unsigned idx = 4*(x + y * nr_verts_in_row);
  85                         color[idx + 0] = (GLubyte)(step * x);
  86                         color[idx + 1] = 0x00;
  87                         color[idx + 2] = (GLubyte)(step * y);
  88                         color[idx + 3] = 0x00;
  89                 }
  90         }
  91         glColorPointer( 4, GL_UNSIGNED_BYTE, 0, color );
  92 }
  93
  94 static void generate_indices( void )
  95 {
  96         unsigned strip, i;
  97
  98         /* indice size * number of strips * number of indices in strip */
  99         indices = malloc(sizeof(indices[0]) * (nr_verts_in_row - 1) *
 100                         (nr_indices_in_strip));
 101
 102         for (strip = 0; strip < nr_verts_in_row - 1; strip += 2) {
 103                 for (i = 0; i < nr_indices_in_strip; i+=2) {
 104                         unsigned idx = i + strip * nr_indices_in_strip;
 105                         unsigned idx2 = (nr_indices_in_strip - i - 2) + (strip +
 106                                         1) * (nr_indices_in_strip);
 107                         indices[idx + 1] = i/2 + strip*nr_verts_in_row;
 108                         indices[idx] = i/2 + (strip + 1)*nr_verts_in_row;
 109                         if (strip + 1 < nr_verts_in_row - 1) {
 110                                 indices[idx2] = i/2 + (strip + 1)*nr_verts_in_row;
 111                                 indices[idx2 + 1] = i/2 + (strip + 2)*nr_verts_in_row;
 112                         }
 113                 }
 114         }
 115 }
 116
 117 static void init( void )
 118 {
 119
 120
 121         generate_verts();
 122         generate_colors();
 123         generate_indices();
 124
 125         glClearColor( 0.0, 0.0, 0.0, 0.0 );
 126         glShadeModel( GL_SMOOTH );
 127
 128         glEnableClientState( GL_VERTEX_ARRAY );
 129         glEnableClientState( GL_COLOR_ARRAY );
 130
 131         glMatrixMode( GL_PROJECTION );
 132         glLoadIdentity();
 133         glFrustum( -100.0, 100.0, -100.0, 100.0, 1.0, 100.0 );
 134         glMatrixMode( GL_MODELVIEW );
 135         glLoadIdentity();
 136
 137 #ifdef GL_EXT_compiled_vertex_array
 138         if ( compiled ) {
 139                 glLockArraysEXT( 0, rows * rows );
 140         }
 141 #endif
 142 }
 143
 144 static void display( void )
 145 {
 146         glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 147
 148         glDrawElements( GL_TRIANGLE_STRIP, nr_indices_in_strip * (nr_verts_in_row - 1) , GL_UNSIGNED_INT, indices );
 149
 150         if ( double_buffer )
 151                 glutSwapBuffers();
 152         else
 153                 glFlush();
 154 }
 155
 156 static void keyboard( unsigned char key, int x, int y )
 157 {
 158         switch ( key ) {
 159         case 27:
 160                 exit( 0 );
 161                 break;
 162         }
 163
 164         glutPostRedisplay();
 165 }
 166
 167 static GLboolean args( int argc, char **argv )
 168 {
 169     GLint i;
 170
 171     double_buffer = GL_TRUE;
 172
 173     for ( i = 1 ; i < argc ; i++ ) {
 174         if ( strcmp( argv[i], "-sb" ) == 0 ) {
 175             double_buffer = GL_FALSE;
 176         } else if ( strcmp( argv[i], "-db" ) == 0 ) {
 177             double_buffer = GL_TRUE;
 178         } else {
 179             fprintf( stderr, "%s (Bad option).\n", argv[i] );
 180             return GL_FALSE;
 181         }
 182     }
 183     return GL_TRUE;
 184 }
 185
 186 int main( int argc, char **argv )
 187 {
 188    GLenum type;
 189    char *string;
 190    double version;
 191
 192    glutInit( &argc, argv );
 193
 194    if ( args( argc, argv ) == GL_FALSE ) {
 195       exit( 1 );
 196    }
 197
 198    type = GLUT_RGB | GLUT_DEPTH;
 199    type |= ( double_buffer ) ? GLUT_DOUBLE : GLUT_SINGLE;
 200
 201    glutInitDisplayMode( type );
 202    glutInitWindowSize( 250, 250 );
 203    glutInitWindowPosition( 100, 100 );
 204    glutCreateWindow( "CVA Test" );
 205
 206    /* Make sure the server supports GL 1.2 vertex arrays.
 207     */
 208    string = (char *) glGetString( GL_VERSION );
 209
 210    version = atof(string);
 211    if ( version < 1.2 ) {
 212       fprintf( stderr, "This program requires OpenGL 1.2 vertex arrays.\n" );
 213       exit( -1 );
 214    }
 215
 216    /* See if the server supports compiled vertex arrays.
 217     */
 218    string = (char *) glGetString( GL_EXTENSIONS );
 219
 220    if ( !strstr( string, "GL_EXT_compiled_vertex_array" ) ) {
 221       fprintf( stderr, "Compiled vertex arrays not supported by this renderer.\n" );
 222       compiled = GL_FALSE;
 223    }
 224
 225    init();
 226
 227    glutDisplayFunc( display );
 228    glutKeyboardFunc( keyboard );
 229    glutMainLoop();
 230
 231    return 0;
 232 }