Attachment 13080 Details for Bug 13634 – test case

test case

texcubemap3.c (text/plain), 3.70 KB, created by Shuang He on 2007-12-12 19:55:40 UTC

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Creator: Shuang He

Created: 2007-12-12 19:55:40 UTC

Size: 3.70 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>
>void
>init (void)
>{
>    int i;
>    GLfloat white[] = { 1.0, 1.0, 1.0, 1.0 };
>
>    glClearColor (0.0, 0.0, 0.0, 1.0);
>    glColor4fv (white);
>    glDisable (GL_DITHER);
>}
>
>#define CUBE_MAP_SIZE 64
>static GLfloat vertex[4][3] = {
>    {-CUBE_MAP_SIZE / 2, +CUBE_MAP_SIZE / 2, -CUBE_MAP_SIZE / 2},
>    {+CUBE_MAP_SIZE / 2, +CUBE_MAP_SIZE / 2, -CUBE_MAP_SIZE / 2},
>    {+CUBE_MAP_SIZE / 2, -CUBE_MAP_SIZE / 2, -CUBE_MAP_SIZE / 2},
>    {-CUBE_MAP_SIZE / 2, -CUBE_MAP_SIZE / 2, -CUBE_MAP_SIZE / 2},
>};
>
>#define I 2
>static GLfloat positive_x_face[4][3] = {
>    {+2, -2, +2}, {+2, -2, -2}, {+2, +2, -2}, {+2, +2, +2}
>};
>
>static void
>test (void)
>{
>    int i, j, faceIndex;
>    int texName;
>    GLfloat CubeMap[6][CUBE_MAP_SIZE][CUBE_MAP_SIZE][3];
>    GLfloat buf[WINDSIZEX * WINDSIZEY * 3];
>
>    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>    glColor3f (1.0, 1.0, 1.0);
>    glMatrixMode (GL_MODELVIEW);
>    glLoadIdentity ();
>    glGenTextures (1, &texName);
>    glBindTexture (GL_TEXTURE_CUBE_MAP_ARB, texName);
>    glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
>    glTexParameteri (GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER,
>                     GL_NEAREST);
>    glTexParameteri (GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER,
>                     GL_NEAREST);
>
>    for (faceIndex = 0; faceIndex < 6; faceIndex++)
>    {
>        for (i = 0; i < CUBE_MAP_SIZE; i++)
>        {
>            for (j = 0; j < CUBE_MAP_SIZE; j++)
>            {
>                CubeMap[faceIndex][i][j][0] = faceIndex==0? 1.0:0.0;
>                CubeMap[faceIndex][i][j][1] = faceIndex==4? 1.0:0.0;
>                CubeMap[faceIndex][i][j][2] = 0.0;
>            }
>        }
>    }
>
>    for (j = 0; j < 6; j++)
>    {
>        glTexImage2D (GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + j,
>                      0,
>                      GL_RGB,
>                      CUBE_MAP_SIZE,
>                      CUBE_MAP_SIZE, 0, GL_RGB, GL_FLOAT, CubeMap[j]);
>    }
>
>    glDisable (GL_TEXTURE_GEN_S);
>    glDisable (GL_TEXTURE_GEN_T);
>    glDisable (GL_TEXTURE_GEN_R);
>    glEnable (GL_TEXTURE_CUBE_MAP_ARB);
>    glColor3f (1.0, 1.0, 1.0);
>
>    glBindTexture (GL_TEXTURE_CUBE_MAP_ARB, texName);
>    glBegin (GL_POLYGON);
>    for (i = 0; i < 4; i++)
>    {
>        glTexCoord3f (positive_x_face[i][0], positive_x_face[i][1],
>                      positive_x_face[i][2]);
>        glVertex3f (vertex[i][0], vertex[i][1], vertex[i][2]);
>    }
>    glEnd ();
>    glFlush ();
>
>    printf ("read out pixels:\n");
>    glReadPixels (0, 0, WINDSIZEX, WINDSIZEY, GL_RGB, GL_FLOAT, buf);
>    for (j = 0; j < WINDSIZEY; j++)
>    {
>        for (i = 0; i < WINDSIZEY; i++)
>        {
>            if (buf[(j * WINDSIZEX + i) * 3] != 0
>                || buf[(j * WINDSIZEX + i) * 3 + 1] != 0
>                || buf[(j * WINDSIZEX + i) * 3 + 2] != 0)
>            {
>                printf ("(%d, %d) = [%f, %f, %f]\n", i, j,
>                        buf[(j * WINDSIZEX + i) * 3],
>                        buf[(j * WINDSIZEX + i) * 3 + 1],
>                        buf[(j * WINDSIZEX + i) * 3 + 2]);
>            }
>        }
>    }
>}
>
>void
>display (void)
>{
>    glMatrixMode (GL_PROJECTION);
>    glLoadIdentity ();
>    glOrtho (-50, 50, -50, 50, 0, 2048);
>
>    test ();
>}
>
>int
>main (int argc, char **argv)
>{
>    glutInit (&argc, argv);
>    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGBA);
>    glutInitWindowSize (WINDSIZEX, WINDSIZEY);
>    glutInitWindowPosition (100, 100);
>    glutCreateWindow (argv[0]);
>    init ();
>    glutDisplayFunc (display);
>    glutMainLoop ();
>    return 0;
>}

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Attachments on bug 13634: 13080 | 13081 | 15282

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