How to use texture format of GL_RGB10_A2UI?

OpenGL OpenGL: Basic Coding
1

Hi,all:
I want to write a demo, it’s texture format is RGB10_A2UI.


typedef struct __TEXTURE_{
        GLubyte R;
        GLubyte G;
        GLubyte B;
        GLubyte A;
}TexRGB10A2UI,*pTexRGB10A2UI;
GLuint RGBA10_10_10_2_UI_CAST(const pTexRGB10A2UI texture)
{
        return (GLuint)((GLuint)(texture->R & 0x03FFu) << 22u |\
                        (GLuint)(texture->G & 0x03FFu) << 12u |\
                        (GLuint)(texture->B & 0x03FFu) <<  2u |\
                        (GLuint)(texture->A & 0x0003u) <<  0u);
}


static void makeCheckImages(void)
{
   int i, j, c;


   for (i = 0; i < checkImageHeight; i++) 
    {
      for (j = 0; j < checkImageWidth; j++) 
    {
         c = ((((i&0x8)==0)^((j&0x8)==0)))*255;
         checkImage[i][j][0] = (GLuint) c;
     checkImage[i][j][1] = (GLuint) c;
      checkImage[i][j][2] = (GLuint) c;
     checkImage[i][j][3] = (GLuint) 255;
    RGB10A2UIImage[i][j] = RGBA10_10_10_2_UI_CAST((pTexRGB10A2UI)checkImage[i][j]);
    }
     }    
}


static void init(void)
{
   glClearColor (0.0, 0.0, 1.0, 0.0);
   glShadeModel(GL_FLAT);
   glEnable(GL_DEPTH_TEST);


   makeCheckImages();
   glPixelStorei(GL_UNPACK_ALIGNMENT, 4);


   glGenTextures(1, texName);
   glBindTexture(GL_TEXTURE_2D, texName);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,GL_NEAREST);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_NEAREST);
   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2UI, checkImageWidth,
                checkImageHeight, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_10_10_10_2,
        RGB10A2UIImage);


   printf("%s
",gluErrorString(glGetError()));
   glEnable(GL_TEXTURE_2D);
}
static void display(void)
{
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glBindTexture(GL_TEXTURE_2D, texName);
   glPushMatrix();
       glBegin(GL_QUADS);
       glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
       glTexCoord2f(0.0, 1.0); glVertex3f(-2.0, 1.0, 0.0);
       glTexCoord2f(1.0, 1.0); glVertex3f(0.0, 1.0, 0.0);
       glTexCoord2f(1.0, 0.0); glVertex3f(0.0, -1.0, 0.0);
       glEnd();
    glPopMatrix();
   glFlush();
}



 When I use  

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, checkImageWidth,checkImageHeight, 0, GL_RGBA,GL_UNSIGNED_INT,checkImage);

instead of

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2UI, checkImageWidth,checkImageHeight, 0, GL_RGBA_INTEGER,GL_UNSIGNED_INT_10_10_10_2,RGB10A2UIImage);

, I got the right texture reslut, it shows a check image on the window.
When I use

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2UI, checkImageWidth,checkImageHeight, 0, GL_RGBA_INTEGER,GL_UNSIGNED_INT_10_10_10_2,RGB10A2UIImage);

,although the demo reports “no error”, I’ve got a white texture on the window.
so I am a little baffled why the demo can’t give the right texture result.

2

Integer textures are useless in fixed function. You need to upgrade to GLSL to make use of them.

3

Please don’t open a new thread when your old thread, concerning the exact same thing, is not even two weeks old: How to use GL_RGB10_A2UI in OpenGL3.3 or later? - OpenGL: Basic Coding - Khronos Forums

4

Didn’t you say you were using GL 3.3 in your other thread? You should be using shaders for ALL rendering.

5

ok,got it!

6

ok,got it!