Ian Romanick | b462855 | 2005-08-18 19:52:44 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2000 Brian Paul 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 | * BRIAN PAUL 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 | * \file bug_3195.c |
| 24 | * |
| 25 | * Simple regression test for bug #3195. A bug in the i180 driver caused |
| 26 | * a segfault (inside the driver) when the LOD bias is adjusted and no texture |
| 27 | * is enabled. This test, which is based on progs/demos/lodbias.c, sets up |
| 28 | * all the texturing, disables all textures, adjusts the LOD bias, then |
| 29 | * re-enables \c GL_TEXTURE_2D. |
| 30 | * |
| 31 | * \author Brian Paul |
| 32 | * \author Ian Romanick <idr@us.ibm.com> |
| 33 | */ |
| 34 | |
| 35 | #include <assert.h> |
| 36 | #include <stdlib.h> |
| 37 | #include <stdio.h> |
| 38 | #include <math.h> |
| 39 | #include <GL/glut.h> |
| 40 | #include <GL/glext.h> |
| 41 | |
| 42 | #include "readtex.h" |
| 43 | |
| 44 | #define TEXTURE_FILE "../images/girl.rgb" |
| 45 | |
| 46 | static GLfloat Xrot = 0, Yrot = -30, Zrot = 0; |
| 47 | static GLint Bias = 0, BiasStepSign = +1; /* ints avoid fp precision problem */ |
| 48 | static GLint BiasMin = -400, BiasMax = 400; |
| 49 | |
| 50 | |
| 51 | |
| 52 | static void |
| 53 | PrintString(const char *s) |
| 54 | { |
| 55 | while (*s) { |
| 56 | glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s); |
| 57 | s++; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | static void Idle( void ) |
| 62 | { |
| 63 | static int lastTime = 0; |
| 64 | int time = glutGet(GLUT_ELAPSED_TIME); |
| 65 | int step; |
| 66 | |
| 67 | if (lastTime == 0) |
| 68 | lastTime = time; |
| 69 | else if (time - lastTime < 10) |
| 70 | return; |
| 71 | |
| 72 | step = (time - lastTime) / 10 * BiasStepSign; |
| 73 | lastTime = time; |
| 74 | |
| 75 | Bias += step; |
| 76 | if (Bias < BiasMin) { |
| 77 | exit(0); |
| 78 | } |
| 79 | else if (Bias > BiasMax) { |
| 80 | Bias = BiasMax; |
| 81 | BiasStepSign = -1; |
| 82 | } |
| 83 | |
| 84 | glutPostRedisplay(); |
| 85 | } |
| 86 | |
| 87 | |
| 88 | static void Display( void ) |
| 89 | { |
| 90 | char str[100]; |
| 91 | |
| 92 | glClear( GL_COLOR_BUFFER_BIT ); |
| 93 | |
| 94 | glMatrixMode( GL_PROJECTION ); |
| 95 | glLoadIdentity(); |
| 96 | glOrtho(-1, 1, -1, 1, -1, 1); |
| 97 | glMatrixMode( GL_MODELVIEW ); |
| 98 | glLoadIdentity(); |
| 99 | |
| 100 | glDisable(GL_TEXTURE_2D); |
| 101 | glColor3f(1,1,1); |
| 102 | glRasterPos3f(-0.9, -0.9, 0.0); |
| 103 | sprintf(str, "Texture LOD Bias = %4.1f", Bias * 0.01); |
| 104 | PrintString(str); |
| 105 | |
| 106 | glMatrixMode( GL_PROJECTION ); |
| 107 | glLoadIdentity(); |
| 108 | glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 ); |
| 109 | glMatrixMode( GL_MODELVIEW ); |
| 110 | glLoadIdentity(); |
| 111 | glTranslatef( 0.0, 0.0, -8.0 ); |
| 112 | |
| 113 | glPushMatrix(); |
| 114 | glRotatef(Xrot, 1, 0, 0); |
| 115 | glRotatef(Yrot, 0, 1, 0); |
| 116 | glRotatef(Zrot, 0, 0, 1); |
| 117 | |
| 118 | glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0.01 * Bias); |
| 119 | glEnable(GL_TEXTURE_2D); |
| 120 | |
| 121 | glBegin(GL_POLYGON); |
| 122 | glTexCoord2f(0, 0); glVertex2f(-1, -1); |
| 123 | glTexCoord2f(2, 0); glVertex2f( 1, -1); |
| 124 | glTexCoord2f(2, 2); glVertex2f( 1, 1); |
| 125 | glTexCoord2f(0, 2); glVertex2f(-1, 1); |
| 126 | glEnd(); |
| 127 | |
| 128 | glPopMatrix(); |
| 129 | |
| 130 | glutSwapBuffers(); |
| 131 | } |
| 132 | |
| 133 | |
| 134 | static void Reshape( int width, int height ) |
| 135 | { |
| 136 | glViewport( 0, 0, width, height ); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | static void Key( unsigned char key, int x, int y ) |
| 141 | { |
| 142 | (void) x; |
| 143 | (void) y; |
| 144 | switch (key) { |
| 145 | case 27: |
| 146 | exit(0); |
| 147 | break; |
| 148 | } |
| 149 | glutPostRedisplay(); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | static void SpecialKey( int key, int x, int y ) |
| 154 | { |
| 155 | const GLfloat step = 3.0; |
| 156 | (void) x; |
| 157 | (void) y; |
| 158 | switch (key) { |
| 159 | case GLUT_KEY_UP: |
| 160 | Xrot -= step; |
| 161 | break; |
| 162 | case GLUT_KEY_DOWN: |
| 163 | Xrot += step; |
| 164 | break; |
| 165 | case GLUT_KEY_LEFT: |
| 166 | Yrot -= step; |
| 167 | break; |
| 168 | case GLUT_KEY_RIGHT: |
| 169 | Yrot += step; |
| 170 | break; |
| 171 | } |
| 172 | glutPostRedisplay(); |
| 173 | } |
| 174 | |
| 175 | |
| 176 | static void Init( void ) |
| 177 | { |
| 178 | GLfloat maxBias; |
| 179 | const char * const ver_string = (const char * const) |
| 180 | glGetString( GL_VERSION ); |
| 181 | |
| 182 | printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); |
| 183 | printf("GL_VERSION = %s\n", ver_string); |
| 184 | |
| 185 | printf("\nThis program should function nearly identically to Mesa's lodbias demo.\n" |
| 186 | "It should cycle through the complet LOD bias range once and exit. If bug\n" |
| 187 | "#3195 still exists, the demo should crash almost immediatly.\n"); |
Ian Romanick | 448d233 | 2006-03-06 16:42:12 +0000 | [diff] [blame] | 188 | printf("This is a regression test for bug #3195.\n"); |
| 189 | printf("https://bugs.freedesktop.org/show_bug.cgi?id=3195\n"); |
Ian Romanick | b462855 | 2005-08-18 19:52:44 +0000 | [diff] [blame] | 190 | |
| 191 | if (!glutExtensionSupported("GL_EXT_texture_lod_bias")) { |
| 192 | printf("Sorry, GL_EXT_texture_lod_bias not supported by this renderer.\n"); |
| 193 | exit(1); |
| 194 | } |
| 195 | |
| 196 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| 197 | |
| 198 | if (glutExtensionSupported("GL_SGIS_generate_mipmap")) { |
| 199 | /* test auto mipmap generation */ |
| 200 | GLint width, height, i; |
| 201 | GLenum format; |
| 202 | GLubyte *image = LoadRGBImage(TEXTURE_FILE, &width, &height, &format); |
| 203 | if (!image) { |
| 204 | printf("Error: could not load texture image %s\n", TEXTURE_FILE); |
| 205 | exit(1); |
| 206 | } |
| 207 | /* resize to 256 x 256 */ |
| 208 | if (width != 256 || height != 256) { |
| 209 | GLubyte *newImage = malloc(256 * 256 * 4); |
| 210 | gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image, |
| 211 | 256, 256, GL_UNSIGNED_BYTE, newImage); |
| 212 | free(image); |
| 213 | image = newImage; |
| 214 | } |
| 215 | printf("Using GL_SGIS_generate_mipmap\n"); |
| 216 | glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE); |
| 217 | glTexImage2D(GL_TEXTURE_2D, 0, format, 256, 256, 0, |
| 218 | format, GL_UNSIGNED_BYTE, image); |
| 219 | free(image); |
| 220 | |
| 221 | /* make sure mipmap was really generated correctly */ |
| 222 | width = height = 256; |
| 223 | for (i = 0; i < 9; i++) { |
| 224 | GLint w, h; |
| 225 | glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w); |
| 226 | glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h); |
| 227 | printf("Level %d size: %d x %d\n", i, w, h); |
| 228 | assert(w == width); |
| 229 | assert(h == height); |
| 230 | width /= 2; |
| 231 | height /= 2; |
| 232 | } |
| 233 | |
| 234 | } |
| 235 | else if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) { |
| 236 | printf("Error: could not load texture image %s\n", TEXTURE_FILE); |
| 237 | exit(1); |
| 238 | } |
| 239 | |
| 240 | /* mipmapping required for this extension */ |
| 241 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
| 242 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 243 | glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| 244 | |
| 245 | glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &maxBias); |
| 246 | printf("LOD bias range: [%g, %g]\n", -maxBias, maxBias); |
| 247 | BiasMin = -100 * maxBias; |
| 248 | BiasMax = 100 * maxBias; |
| 249 | |
| 250 | /* Since we have (about) 8 mipmap levels, no need to bias beyond |
| 251 | * the range [-1, +8]. |
| 252 | */ |
| 253 | if (BiasMin < -100) |
| 254 | BiasMin = -100; |
| 255 | if (BiasMax > 800) |
| 256 | BiasMax = 800; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | int main( int argc, char *argv[] ) |
| 261 | { |
| 262 | glutInit( &argc, argv ); |
| 263 | glutInitWindowPosition( 0, 0 ); |
| 264 | glutInitWindowSize( 350, 350 ); |
| 265 | glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); |
| 266 | glutCreateWindow( "Bug #3195 Test" ); |
| 267 | glutReshapeFunc( Reshape ); |
| 268 | glutKeyboardFunc( Key ); |
| 269 | glutSpecialFunc( SpecialKey ); |
| 270 | glutDisplayFunc( Display ); |
| 271 | glutIdleFunc(Idle); |
| 272 | Init(); |
| 273 | glutMainLoop(); |
| 274 | return 0; |
| 275 | } |