static CoglBool
append_tex_coord_attributes_cb (CoglPipeline *pipeline,
int layer_index,
void *user_data)
{
AppendTexCoordsState *state = user_data;
CoglTexture *texture;
float tx, ty;
float *t;
tx = state->vertices_in[state->vertex].tx;
ty = state->vertices_in[state->vertex].ty;
/* NULL textures will be handled in
* _cogl_pipeline_flush_layers_gl_state but there is no need to worry
* about scaling texture coordinates in this case */
texture = cogl_pipeline_get_layer_texture (pipeline, layer_index);
if (texture != NULL)
_cogl_texture_transform_coords_to_gl (texture, &tx, &ty);
/* NB: [X,Y,Z,TX,TY...,R,G,B,A,...] */
t = state->vertices_out + 3 + 2 * state->layer;
t[0] = tx;
t[1] = ty;
state->layer++;
return TRUE;
}
static void
_cogl_texture_pixmap_x11_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglTexturePixmapX11 *tex_pixmap = COGL_TEXTURE_PIXMAP_X11 (tex);
CoglTexture *child_tex = _cogl_texture_pixmap_x11_get_texture (tex_pixmap);
/* Forward on to the child texture */
_cogl_texture_transform_coords_to_gl (child_tex, s, t);
}
static void
_cogl_sub_texture_transform_coords_to_gl (CoglTexture *tex,
float *s,
float *t)
{
CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
/* This won't work if the sub texture is not the size of the full
texture and the coordinates are outside the range [0,1] */
*s = ((*s * tex->width + sub_tex->sub_x) /
cogl_texture_get_width (sub_tex->full_texture));
*t = ((*t * tex->height + sub_tex->sub_y) /
cogl_texture_get_height (sub_tex->full_texture));
_cogl_texture_transform_coords_to_gl (sub_tex->full_texture, s, t);
}
