void
_cogl_texture_gl_prep_alignment_for_pixels_upload (CoglContext *ctx,
int pixels_rowstride)
{
GE( ctx, glPixelStorei (GL_UNPACK_ALIGNMENT,
calculate_alignment (pixels_rowstride)) );
}
void
_cg_texture_gl_prep_alignment_for_pixels_upload(cg_device_t *dev,
int pixels_rowstride)
{
GE(dev,
glPixelStorei(GL_UNPACK_ALIGNMENT,
calculate_alignment(pixels_rowstride)));
}
void
_cogl_texture_gl_prep_alignment_for_pixels_download (CoglContext *ctx,
int bpp,
int width,
int rowstride)
{
int alignment;
/* If no padding is needed then we can always use an alignment of 1.
* We want to do this even though it is equivalent to the alignment
* of the rowstride because the Intel driver in Mesa currently has
* an optimisation when reading data into a PBO that only works if
* the alignment is exactly 1.
*
* https://bugs.freedesktop.org/show_bug.cgi?id=46632
*/
if (rowstride == bpp * width)
alignment = 1;
else
alignment = calculate_alignment (rowstride);
GE( ctx, glPixelStorei (GL_PACK_ALIGNMENT, alignment) );
}