Attachment 70972 Details for Bug 57842 – Test case

Test case

fbo.c (text/plain), 3.13 KB, created by Stefan Dösinger on 2012-12-03 15:12:57 UTC

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Creator: Stefan Dösinger

Created: 2012-12-03 15:12:57 UTC

Size: 3.13 KB

patch

obsolete

>#define GL_GLEXT_PROTOTYPES
>#include <GL/gl.h>
>#include <GL/glext.h>
>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <string.h>
>
>#define TEX_W 256
>#define TEX_H 256
>
>#define CHECK_GLERROR()                                     \
>{                                                           \
>    GLenum err = glGetError();                              \
>    while (err != GL_NO_ERROR)                              \
>    {                                                       \
>        fprintf(stderr, "GL Error %#x, %s, line %d\n",      \
>                err, __FILE__, __LINE__);                   \
>        err = glGetError();                                 \
>    }                                                       \
>}
>
>void init(void)
>{
>    GLuint tex, fbo;
>    GLenum status;
>
>    /* Generate a destination texture */
>    glGenTextures(1, &tex);
>    glBindTexture(GL_TEXTURE_2D, tex);
>    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, TEX_W, TEX_H, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
>    CHECK_GLERROR();
>
>    /* Prepare a fbo with the texture as color attachment */
>    glGenFramebuffersEXT(1, &fbo);
>    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
>    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, tex, 0);
>    glViewport(0, 0, TEX_W, TEX_H);
>    CHECK_GLERROR();
>    status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
>    if (status != GL_FRAMEBUFFER_COMPLETE_EXT) fprintf(stderr, "FBO status %#x\n", status);
>
>    glClearColor(0.0, 0.0, 1.0, 0);
>    glClear(GL_COLOR_BUFFER_BIT);
>    CHECK_GLERROR();
>
>    glEnable(GL_CULL_FACE);
>    glCullFace(GL_FRONT);
>    glFrontFace(GL_CCW);
>    CHECK_GLERROR();
>
>    glColor4f(0.0, 1.0, 0.0, 1.0);
>    glBegin(GL_TRIANGLES);
>    glVertex3f(-1.0, -1.0, -1.0);
>    glVertex3f(-1.0,  1.0, -1.0);
>    glVertex3f( 1.0,  1.0,  1.0);
>    glEnd();
>
>    glColor4f(1.0, 0.0, 0.0, 1.0);
>    glBegin(GL_TRIANGLES);
>    glVertex3f( 1.0, -1.0,  1.0);
>    glVertex3f( 1.0,  1.0,  1.0);
>    glVertex3f(-1.0, -1.0, -1.0);
>    glEnd();
>    CHECK_GLERROR();
>
>    glDisable(GL_CULL_FACE);
>    CHECK_GLERROR();
>
>    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
>    glBindTexture(GL_TEXTURE_2D, tex);
>    glEnable(GL_TEXTURE_2D);
>    glClearColor(1.0, 1.0, 1.0, 1.0);
>    glViewport(0, 0, 200, 200);
>    glColor4f(1.0, 1.0, 1.0, 1.0);
>    CHECK_GLERROR();
>}
>
>void display(void)
>{
>    glClear(GL_COLOR_BUFFER_BIT);
>
>    glBegin(GL_QUADS);
>    glTexCoord2f(0.0, 0.0);
>    glVertex3f(-1.0, -1.0, -0.5);
>    glTexCoord2f(0.0, 1.0);
>    glVertex3f(-1.0,  1.0, -0.5);
>    glTexCoord2f(1.0, 1.0);
>    glVertex3f( 1.0,  1.0, -0.5);
>    glTexCoord2f(1.0, 0.0);
>    glVertex3f( 1.0, -1.0, -0.5);
>
>    glEnd();
>    glFlush();
>    glutSwapBuffers();
>}
>
>int main(int argc, char** argv)
>{
>    glutInit(&argc, argv);
>
>    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_ACCUM);
>    glutInitWindowSize(200, 200);
>    glutCreateWindow(argv[0]);
>    init();
>
>    glutDisplayFunc(display);
>    glutIdleFunc(display);
>    glutMainLoop();
>    return 0;
>}

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Attachments on bug 57842: 70972 | 71014 | 71022 | 72047 | 72050 | 72051

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