xserver/GL/windows/glwrap.c

#include <GL/gl.h>

/*
 * GLX implementation that uses Win32's OpenGL
 */

/*
 * Server-side GLX uses these functions which are normally defined
 * in the OpenGL SI.
 */

GLint __glEvalComputeK(GLenum target)
{
    switch (target) {
    case GL_MAP1_VERTEX_4:
    case GL_MAP1_COLOR_4:
    case GL_MAP1_TEXTURE_COORD_4:
    case GL_MAP2_VERTEX_4:
    case GL_MAP2_COLOR_4:
    case GL_MAP2_TEXTURE_COORD_4:
	return 4;
    case GL_MAP1_VERTEX_3:
    case GL_MAP1_TEXTURE_COORD_3:
    case GL_MAP1_NORMAL:
    case GL_MAP2_VERTEX_3:
    case GL_MAP2_TEXTURE_COORD_3:
    case GL_MAP2_NORMAL:
	return 3;
    case GL_MAP1_TEXTURE_COORD_2:
    case GL_MAP2_TEXTURE_COORD_2:
	return 2;
    case GL_MAP1_TEXTURE_COORD_1:
    case GL_MAP2_TEXTURE_COORD_1:
    case GL_MAP1_INDEX:
    case GL_MAP2_INDEX:
	return 1;
    default:
	return 0;
    }
}

GLuint __glFloorLog2(GLuint val)
{
    int c = 0;

    while (val > 1) {
	c++;
	val >>= 1;
    }
    return c;
}