277 lines
7.5 KiB
C
277 lines
7.5 KiB
C
/*
|
|
* Copyright (C) 2000 Brian Paul All Rights Reserved.
|
|
*
|
|
* 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 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
|
|
* BRIAN PAUL 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.
|
|
*/
|
|
|
|
/**
|
|
* \file bug_3195.c
|
|
*
|
|
* Simple regression test for bug #3195. A bug in the i180 driver caused
|
|
* a segfault (inside the driver) when the LOD bias is adjusted and no texture
|
|
* is enabled. This test, which is based on progs/demos/lodbias.c, sets up
|
|
* all the texturing, disables all textures, adjusts the LOD bias, then
|
|
* re-enables \c GL_TEXTURE_2D.
|
|
*
|
|
* \author Brian Paul
|
|
* \author Ian Romanick <idr@us.ibm.com>
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
#include <GL/glew.h>
|
|
#include <GL/glut.h>
|
|
|
|
#include "readtex.h"
|
|
|
|
#define TEXTURE_FILE "../images/girl.rgb"
|
|
|
|
static GLfloat Xrot = 0, Yrot = -30, Zrot = 0;
|
|
static GLint Bias = 0, BiasStepSign = +1; /* ints avoid fp precision problem */
|
|
static GLint BiasMin = -400, BiasMax = 400;
|
|
|
|
|
|
|
|
static void
|
|
PrintString(const char *s)
|
|
{
|
|
while (*s) {
|
|
glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
|
|
s++;
|
|
}
|
|
}
|
|
|
|
static void Idle( void )
|
|
{
|
|
static int lastTime = 0;
|
|
int time = glutGet(GLUT_ELAPSED_TIME);
|
|
int step;
|
|
|
|
if (lastTime == 0)
|
|
lastTime = time;
|
|
else if (time - lastTime < 10)
|
|
return;
|
|
|
|
step = (time - lastTime) / 10 * BiasStepSign;
|
|
lastTime = time;
|
|
|
|
Bias += step;
|
|
if (Bias < BiasMin) {
|
|
exit(0);
|
|
}
|
|
else if (Bias > BiasMax) {
|
|
Bias = BiasMax;
|
|
BiasStepSign = -1;
|
|
}
|
|
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
|
|
static void Display( void )
|
|
{
|
|
char str[100];
|
|
|
|
glClear( GL_COLOR_BUFFER_BIT );
|
|
|
|
glMatrixMode( GL_PROJECTION );
|
|
glLoadIdentity();
|
|
glOrtho(-1, 1, -1, 1, -1, 1);
|
|
glMatrixMode( GL_MODELVIEW );
|
|
glLoadIdentity();
|
|
|
|
glDisable(GL_TEXTURE_2D);
|
|
glColor3f(1,1,1);
|
|
glRasterPos3f(-0.9, -0.9, 0.0);
|
|
sprintf(str, "Texture LOD Bias = %4.1f", Bias * 0.01);
|
|
PrintString(str);
|
|
|
|
glMatrixMode( GL_PROJECTION );
|
|
glLoadIdentity();
|
|
glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
|
|
glMatrixMode( GL_MODELVIEW );
|
|
glLoadIdentity();
|
|
glTranslatef( 0.0, 0.0, -8.0 );
|
|
|
|
glPushMatrix();
|
|
glRotatef(Xrot, 1, 0, 0);
|
|
glRotatef(Yrot, 0, 1, 0);
|
|
glRotatef(Zrot, 0, 0, 1);
|
|
|
|
glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0.01 * Bias);
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glBegin(GL_POLYGON);
|
|
glTexCoord2f(0, 0); glVertex2f(-1, -1);
|
|
glTexCoord2f(2, 0); glVertex2f( 1, -1);
|
|
glTexCoord2f(2, 2); glVertex2f( 1, 1);
|
|
glTexCoord2f(0, 2); glVertex2f(-1, 1);
|
|
glEnd();
|
|
|
|
glPopMatrix();
|
|
|
|
glutSwapBuffers();
|
|
}
|
|
|
|
|
|
static void Reshape( int width, int height )
|
|
{
|
|
glViewport( 0, 0, width, height );
|
|
}
|
|
|
|
|
|
static void Key( unsigned char key, int x, int y )
|
|
{
|
|
(void) x;
|
|
(void) y;
|
|
switch (key) {
|
|
case 27:
|
|
exit(0);
|
|
break;
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
|
|
static void SpecialKey( int key, int x, int y )
|
|
{
|
|
const GLfloat step = 3.0;
|
|
(void) x;
|
|
(void) y;
|
|
switch (key) {
|
|
case GLUT_KEY_UP:
|
|
Xrot -= step;
|
|
break;
|
|
case GLUT_KEY_DOWN:
|
|
Xrot += step;
|
|
break;
|
|
case GLUT_KEY_LEFT:
|
|
Yrot -= step;
|
|
break;
|
|
case GLUT_KEY_RIGHT:
|
|
Yrot += step;
|
|
break;
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
|
|
static void Init( void )
|
|
{
|
|
GLfloat maxBias;
|
|
const char * const ver_string = (const char * const)
|
|
glGetString( GL_VERSION );
|
|
|
|
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
|
|
printf("GL_VERSION = %s\n", ver_string);
|
|
|
|
printf("\nThis program should function nearly identically to Mesa's lodbias demo.\n"
|
|
"It should cycle through the complet LOD bias range once and exit. If bug\n"
|
|
"#3195 still exists, the demo should crash almost immediatly.\n");
|
|
printf("This is a regression test for bug #3195.\n");
|
|
printf("https://bugs.freedesktop.org/show_bug.cgi?id=3195\n");
|
|
|
|
if (!glutExtensionSupported("GL_EXT_texture_lod_bias")) {
|
|
printf("Sorry, GL_EXT_texture_lod_bias not supported by this renderer.\n");
|
|
exit(1);
|
|
}
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
|
|
|
if (glutExtensionSupported("GL_SGIS_generate_mipmap")) {
|
|
/* test auto mipmap generation */
|
|
GLint width, height, i;
|
|
GLenum format;
|
|
GLubyte *image = LoadRGBImage(TEXTURE_FILE, &width, &height, &format);
|
|
if (!image) {
|
|
printf("Error: could not load texture image %s\n", TEXTURE_FILE);
|
|
exit(1);
|
|
}
|
|
/* resize to 256 x 256 */
|
|
if (width != 256 || height != 256) {
|
|
GLubyte *newImage = malloc(256 * 256 * 4);
|
|
gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image,
|
|
256, 256, GL_UNSIGNED_BYTE, newImage);
|
|
free(image);
|
|
image = newImage;
|
|
}
|
|
printf("Using GL_SGIS_generate_mipmap\n");
|
|
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, format, 256, 256, 0,
|
|
format, GL_UNSIGNED_BYTE, image);
|
|
free(image);
|
|
|
|
/* make sure mipmap was really generated correctly */
|
|
width = height = 256;
|
|
for (i = 0; i < 9; i++) {
|
|
GLint w, h;
|
|
glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w);
|
|
glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h);
|
|
printf("Level %d size: %d x %d\n", i, w, h);
|
|
assert(w == width);
|
|
assert(h == height);
|
|
width /= 2;
|
|
height /= 2;
|
|
}
|
|
|
|
}
|
|
else if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
|
|
printf("Error: could not load texture image %s\n", TEXTURE_FILE);
|
|
exit(1);
|
|
}
|
|
|
|
/* mipmapping required for this extension */
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
|
|
glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &maxBias);
|
|
printf("LOD bias range: [%g, %g]\n", -maxBias, maxBias);
|
|
BiasMin = -100 * maxBias;
|
|
BiasMax = 100 * maxBias;
|
|
|
|
/* Since we have (about) 8 mipmap levels, no need to bias beyond
|
|
* the range [-1, +8].
|
|
*/
|
|
if (BiasMin < -100)
|
|
BiasMin = -100;
|
|
if (BiasMax > 800)
|
|
BiasMax = 800;
|
|
}
|
|
|
|
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
glutInit( &argc, argv );
|
|
glutInitWindowPosition( 0, 0 );
|
|
glutInitWindowSize( 350, 350 );
|
|
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
|
|
glutCreateWindow( "Bug #3195 Test" );
|
|
glewInit();
|
|
glutReshapeFunc( Reshape );
|
|
glutKeyboardFunc( Key );
|
|
glutSpecialFunc( SpecialKey );
|
|
glutDisplayFunc( Display );
|
|
glutIdleFunc(Idle);
|
|
Init();
|
|
glutMainLoop();
|
|
return 0;
|
|
}
|