Attachment 13244 Details for Bug 13747 – test case

test case

pbo_bitmap.c (text/plain), 2.96 KB, created by Shuang He on 2007-12-19 17:50:49 UTC

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Creator: Shuang He

Created: 2007-12-19 17:50:49 UTC

Size: 2.96 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>int useUnpackBuffer = 1;
>
>void
>init (void)
>{
>    int i;
>    GLfloat white[] = { 1.0, 1.0, 1.0, 1.0 };
>    GLfloat black[] = { 0.0, 0.0, 0.0, 1.0 };
>    GLfloat red[] = { 1.0, 0.0, 0.0, 1.0 };
>    GLfloat green[] = { 0.0, 1.0, 0.0, 1.0 };
>    GLfloat blue[] = { 0.0, 0.0, 1.0, 1.0 };
>
>    glClearColor (0.0, 0.0, 0.0, 1.0);
>    glColor4fv (white);
>    gluOrtho2D (0, WINDSIZEX, 0, WINDSIZEY);
>    glDisable (GL_DITHER);
>}
>
>
>#define TEXSIZE 8
>static void
>test (void)
>{
>    int i, j;
>    GLuint pb_unpack[1];
>    GLubyte bitmap[TEXSIZE * TEXSIZE / 8];
>    GLfloat buf[WINDSIZEX * WINDSIZEY * 3];
>    GLubyte * pboUnpackMem = NULL;
>    glClearColor (0.0, 0.0, 0.0, 0.0);
>    glColor3f (1.0, 1.0, 1.0);
>
>    if (useUnpackBuffer) {
>       glGenBuffersARB(1, pb_unpack);
>       glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, pb_unpack[0]);
>       glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT, TEXSIZE * TEXSIZE, NULL,
>                    GL_STREAM_DRAW);
>       pboUnpackMem = (GLubyte *) glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT,
>                                       GL_WRITE_ONLY);
>    }
>    else {
>       pboUnpackMem = bitmap;
>    }
>
>
>    for (i = 0; i < TEXSIZE * TEXSIZE / 8; i++) {
>       pboUnpackMem[i] = 0xAA;
>    }
>
>
>    glClear (GL_COLOR_BUFFER_BIT);
>    glRasterPos2f (0.0, 0.0);
>
>    glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
>    if (useUnpackBuffer) {
>       glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT);
>       glBitmap(TEXSIZE, TEXSIZE, 0, 0, 0, 0, NULL);
>       glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
>    }
>    else
>       glBitmap(TEXSIZE, TEXSIZE, 0, 0, 0, 0, pboUnpackMem);
>
>
>    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)
>{
>    glViewport (0, 0, WINDSIZEX, WINDSIZEY);
>    glMatrixMode (GL_PROJECTION);
>    glLoadIdentity ();
>    gluOrtho2D (0, WINDSIZEX, 0, WINDSIZEY);
>    glMatrixMode (GL_MODELVIEW);
>    glLoadIdentity ();
>
>    test ();
>}
>
>int
>main (int argc, char **argv)
>{
>    if (argc > 1)
>	useUnpackBuffer = 0;
>    glutInit (&argc, argv);
>    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
>    glutInitWindowSize (WINDSIZEX, WINDSIZEY);
>    glutInitWindowPosition (100, 100);
>    glutCreateWindow (argv[0]);
>    init ();
>    glutDisplayFunc (display);
>    glutMainLoop ();
>    return 0;
>}

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