| /* |
| * Copyright © 2010 Pauli Nieminen |
| * |
| * 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 (including the next |
| * paragraph) 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 |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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. |
| */ |
| |
| |
| /* |
| * Test case for huge cva arrays. Mesa code has to split this to multiple VBOs |
| * which had memory access error. |
| * This test case doesn't render incorrectly but valgrind showed the memory |
| * access error. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stddef.h> /* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */ |
| #ifdef _WIN32 |
| #include <windows.h> |
| #endif |
| #define GL_GLEXT_LEGACY |
| #include <GL/glut.h> |
| |
| GLfloat *verts; |
| |
| GLubyte *color; |
| |
| GLuint *indices; |
| |
| #define rows 1000 /* Create 1000x1000 vertex grid */ |
| #define row_width 5000.0 |
| #define grid_depth -50.0 |
| GLuint nr_verts_in_row = rows; |
| GLuint nr_indices_in_strip = rows * 2; |
| |
| GLboolean double_buffer; |
| GLboolean compiled = GL_TRUE; |
| |
| static void generate_verts( void ) |
| { |
| unsigned x, y; |
| GLfloat step = row_width /(GLfloat)(nr_verts_in_row - 1); |
| verts = malloc(sizeof(verts[0]) * 4 * nr_verts_in_row * nr_verts_in_row); |
| |
| for (y = 0; y < nr_verts_in_row; ++y) { |
| for (x = 0; x < nr_verts_in_row; ++x) { |
| unsigned idx = 4*(x + y * nr_verts_in_row); |
| verts[idx + 0] = step * x - row_width/2.0; |
| verts[idx + 1] = step * y - row_width/2.0; |
| /* deep enough not to be vissible */ |
| verts[idx + 2] = grid_depth; |
| verts[idx + 3] = 0.0; |
| } |
| } |
| glVertexPointer( 3, GL_FLOAT, sizeof(verts[0])*4, verts ); |
| } |
| |
| static void generate_colors( void ) |
| { |
| unsigned x, y; |
| GLfloat step = 255.0/(GLfloat)(nr_verts_in_row - 1); |
| color = malloc(sizeof(color[0]) * 4 * nr_verts_in_row * nr_verts_in_row); |
| |
| for (y = 0; y < nr_verts_in_row; ++y) { |
| for (x = 0; x < nr_verts_in_row; ++x) { |
| unsigned idx = 4*(x + y * nr_verts_in_row); |
| color[idx + 0] = (GLubyte)(step * x); |
| color[idx + 1] = 0x00; |
| color[idx + 2] = (GLubyte)(step * y); |
| color[idx + 3] = 0x00; |
| } |
| } |
| glColorPointer( 4, GL_UNSIGNED_BYTE, 0, color ); |
| } |
| |
| static void generate_indices( void ) |
| { |
| unsigned strip, i; |
| |
| /* indice size * number of strips * number of indices in strip */ |
| indices = malloc(sizeof(indices[0]) * (nr_verts_in_row - 1) * |
| (nr_indices_in_strip)); |
| |
| for (strip = 0; strip < nr_verts_in_row - 1; strip += 2) { |
| for (i = 0; i < nr_indices_in_strip; i+=2) { |
| unsigned idx = i + strip * nr_indices_in_strip; |
| unsigned idx2 = (nr_indices_in_strip - i - 2) + (strip + |
| 1) * (nr_indices_in_strip); |
| indices[idx + 1] = i/2 + strip*nr_verts_in_row; |
| indices[idx] = i/2 + (strip + 1)*nr_verts_in_row; |
| if (strip + 1 < nr_verts_in_row - 1) { |
| indices[idx2] = i/2 + (strip + 1)*nr_verts_in_row; |
| indices[idx2 + 1] = i/2 + (strip + 2)*nr_verts_in_row; |
| } |
| } |
| } |
| } |
| |
| static void init( void ) |
| { |
| |
| |
| generate_verts(); |
| generate_colors(); |
| generate_indices(); |
| |
| glClearColor( 0.0, 0.0, 0.0, 0.0 ); |
| glShadeModel( GL_SMOOTH ); |
| |
| glEnableClientState( GL_VERTEX_ARRAY ); |
| glEnableClientState( GL_COLOR_ARRAY ); |
| |
| glMatrixMode( GL_PROJECTION ); |
| glLoadIdentity(); |
| glFrustum( -100.0, 100.0, -100.0, 100.0, 1.0, 100.0 ); |
| glMatrixMode( GL_MODELVIEW ); |
| glLoadIdentity(); |
| |
| #ifdef GL_EXT_compiled_vertex_array |
| if ( compiled ) { |
| glLockArraysEXT( 0, rows * rows ); |
| } |
| #endif |
| } |
| |
| static void display( void ) |
| { |
| glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); |
| |
| glDrawElements( GL_TRIANGLE_STRIP, nr_indices_in_strip * (nr_verts_in_row - 1) , GL_UNSIGNED_INT, indices ); |
| |
| if ( double_buffer ) |
| glutSwapBuffers(); |
| else |
| glFlush(); |
| } |
| |
| static void keyboard( unsigned char key, int x, int y ) |
| { |
| switch ( key ) { |
| case 27: |
| exit( 0 ); |
| break; |
| } |
| |
| glutPostRedisplay(); |
| } |
| |
| static GLboolean args( int argc, char **argv ) |
| { |
| GLint i; |
| |
| double_buffer = GL_TRUE; |
| |
| for ( i = 1 ; i < argc ; i++ ) { |
| if ( strcmp( argv[i], "-sb" ) == 0 ) { |
| double_buffer = GL_FALSE; |
| } else if ( strcmp( argv[i], "-db" ) == 0 ) { |
| double_buffer = GL_TRUE; |
| } else { |
| fprintf( stderr, "%s (Bad option).\n", argv[i] ); |
| return GL_FALSE; |
| } |
| } |
| return GL_TRUE; |
| } |
| |
| int main( int argc, char **argv ) |
| { |
| GLenum type; |
| char *string; |
| double version; |
| |
| glutInit( &argc, argv ); |
| |
| if ( args( argc, argv ) == GL_FALSE ) { |
| exit( 1 ); |
| } |
| |
| type = GLUT_RGB | GLUT_DEPTH; |
| type |= ( double_buffer ) ? GLUT_DOUBLE : GLUT_SINGLE; |
| |
| glutInitDisplayMode( type ); |
| glutInitWindowSize( 250, 250 ); |
| glutInitWindowPosition( 100, 100 ); |
| glutCreateWindow( "CVA Test" ); |
| |
| /* Make sure the server supports GL 1.2 vertex arrays. |
| */ |
| string = (char *) glGetString( GL_VERSION ); |
| |
| version = atof(string); |
| if ( version < 1.2 ) { |
| fprintf( stderr, "This program requires OpenGL 1.2 vertex arrays.\n" ); |
| exit( -1 ); |
| } |
| |
| /* See if the server supports compiled vertex arrays. |
| */ |
| string = (char *) glGetString( GL_EXTENSIONS ); |
| |
| if ( !strstr( string, "GL_EXT_compiled_vertex_array" ) ) { |
| fprintf( stderr, "Compiled vertex arrays not supported by this renderer.\n" ); |
| compiled = GL_FALSE; |
| } |
| |
| init(); |
| |
| glutDisplayFunc( display ); |
| glutKeyboardFunc( keyboard ); |
| glutMainLoop(); |
| |
| return 0; |
| } |