/*
** Compute memory required for internal packed array of data of given type
** and format.
*/
GLint __glImageSize(GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLenum target)
{
int bytes_per_row;
int components;
switch( target ) {
case GL_PROXY_TEXTURE_1D:
case GL_PROXY_TEXTURE_2D:
case GL_PROXY_TEXTURE_3D:
case GL_PROXY_TEXTURE_4D_SGIS:
case GL_PROXY_TEXTURE_CUBE_MAP:
case GL_PROXY_TEXTURE_RECTANGLE_ARB:
case GL_PROXY_HISTOGRAM:
case GL_PROXY_COLOR_TABLE:
case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
case GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP:
return 0;
}
if (width < 0 || height < 0 || depth < 0) {
return 0;
}
/*
** Zero is returned if either format or type are invalid.
*/
components = __glElementsPerGroup(format,type);
if (type == GL_BITMAP) {
if (format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX) {
bytes_per_row = (width + 7) >> 3;
} else {
return 0;
/*
** Compute memory required for internal packed array of data of given type
** and format.
*/
GLint __glImageSize(GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type)
{
int bytes_per_row;
int components;
if (width < 0 || height < 0 || depth < 0) {
return 0;
}
/*
** Zero is returned if either format or type are invalid.
*/
components = __glElementsPerGroup(format,type);
if (type == GL_BITMAP) {
if (format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX) {
bytes_per_row = (width + 7) >> 3;
} else {
return 0;
