/* XXX: This should never have been made public API! */
void
cogl_clip_ensure (void)
{
CoglClipStackState *clip_state;
clip_state = _cogl_framebuffer_get_clip_state (_cogl_get_framebuffer ());
_cogl_flush_clip_state (clip_state);
}
CoglClipState *
_cogl_get_clip_state (void)
{
CoglFramebuffer *framebuffer;
framebuffer = cogl_get_draw_framebuffer ();
return _cogl_framebuffer_get_clip_state (framebuffer);
}
void
cogl_clip_push_window_rectangle (int x_offset,
int y_offset,
int width,
int height)
{
CoglHandle framebuffer;
CoglClipStackState *clip_state;
CoglClipStack *stack;
int framebuffer_height;
CoglClipStackEntryWindowRect *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
framebuffer = _cogl_get_framebuffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
stack = clip_state->stacks->data;
framebuffer_height = _cogl_framebuffer_get_height (framebuffer);
entry = g_slice_new (CoglClipStackEntryWindowRect);
/* We store the entry coordinates in OpenGL window coordinate space and so
* because Cogl defines the window origin to be top left but OpenGL defines
* it as bottom left we may need to convert the incoming coordinates.
*
* NB: Cogl forces all offscreen rendering to be done upside down so in this
* case no conversion is needed.
*/
entry->type = COGL_CLIP_STACK_WINDOW_RECT;
entry->x0 = x_offset;
entry->x1 = x_offset + width;
if (cogl_is_offscreen (framebuffer))
{
entry->y0 = y_offset;
entry->y1 = y_offset + height;
}
else
{
entry->y0 = framebuffer_height - y_offset - height;
entry->y1 = framebuffer_height - y_offset;
}
/* Store it in the stack */
stack->stack_top = g_list_prepend (stack->stack_top, entry);
clip_state->stack_dirty = TRUE;
}
void
cogl_clip_stack_restore (void)
{
CoglFramebuffer *framebuffer;
CoglClipState *clip_state;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
framebuffer = _cogl_get_draw_buffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
_cogl_clip_stack_restore_real (clip_state);
}
void
cogl_clip_stack_save (void)
{
CoglHandle framebuffer;
CoglClipStackState *clip_state;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
framebuffer = _cogl_get_framebuffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
_cogl_clip_stack_save_real (clip_state);
}
/* XXX: This should never have been made public API! */
void
cogl_clip_ensure (void)
{
CoglFramebuffer *framebuffer = _cogl_get_draw_buffer ();
CoglClipState *clip_state;
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
/* Flushing the clip state doesn't cause the journal to be
flushed. This function may be being called by an external
application however so it makes sense to flush the journal
here */
_cogl_framebuffer_flush_journal (framebuffer);
_cogl_clip_state_flush (clip_state);
}
void
cogl_clip_push_window_rectangle (int x_offset,
int y_offset,
int width,
int height)
{
CoglFramebuffer *framebuffer;
CoglClipState *clip_state;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
framebuffer = _cogl_get_draw_buffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
clip_state->stacks->data =
_cogl_clip_stack_push_window_rectangle (clip_state->stacks->data,
x_offset, y_offset,
width, height);
}
void
cogl_clip_push_from_path_preserve (void)
{
CoglFramebuffer *framebuffer;
CoglClipState *clip_state;
CoglMatrix modelview_matrix;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
framebuffer = _cogl_get_draw_buffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
cogl_get_modelview_matrix (&modelview_matrix);
clip_state->stacks->data =
_cogl_clip_stack_push_from_path (clip_state->stacks->data,
ctx->current_path,
&modelview_matrix);
}
void
cogl_clip_push_rectangle (float x_1,
float y_1,
float x_2,
float y_2)
{
CoglHandle framebuffer;
CoglClipStackState *clip_state;
CoglClipStack *stack;
CoglClipStackEntryRect *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
/* Try and catch window space rectangles so we can redirect to
* cogl_clip_push_window_rect which will use scissoring. */
if (try_pushing_rect_as_window_rect (x_1, y_1, x_2, y_2))
return;
framebuffer = _cogl_get_framebuffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
stack = clip_state->stacks->data;
entry = g_slice_new (CoglClipStackEntryRect);
/* Make a new entry */
entry->type = COGL_CLIP_STACK_RECT;
entry->x0 = x_1;
entry->y0 = y_1;
entry->x1 = x_2;
entry->y1 = y_2;
cogl_get_modelview_matrix (&entry->matrix);
/* Store it in the stack */
stack->stack_top = g_list_prepend (stack->stack_top, entry);
clip_state->stack_dirty = TRUE;
}
void
cogl_clip_push_rectangle (float x_1,
float y_1,
float x_2,
float y_2)
{
CoglFramebuffer *framebuffer;
CoglClipState *clip_state;
CoglMatrix modelview_matrix;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
framebuffer = _cogl_get_draw_buffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
cogl_get_modelview_matrix (&modelview_matrix);
clip_state->stacks->data =
_cogl_clip_stack_push_rectangle (clip_state->stacks->data,
x_1, y_1, x_2, y_2,
&modelview_matrix);
}
void
cogl_clip_push_from_path_preserve (void)
{
CoglHandle framebuffer;
CoglClipStackState *clip_state;
CoglClipStack *stack;
CoglClipStackEntryPath *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* We don't log clip stack changes in the journal so we must flush
* it before making modifications */
_cogl_journal_flush ();
framebuffer = _cogl_get_framebuffer ();
clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
stack = clip_state->stacks->data;
entry = g_malloc (sizeof (CoglClipStackEntryPath)
+ sizeof (CoglPathNode) * (ctx->path_nodes->len - 1));
entry->type = COGL_CLIP_STACK_PATH;
entry->path_nodes_min = ctx->path_nodes_min;
entry->path_nodes_max = ctx->path_nodes_max;
entry->path_size = ctx->path_nodes->len;
memcpy (entry->path, ctx->path_nodes->data,
sizeof (CoglPathNode) * ctx->path_nodes->len);
cogl_get_modelview_matrix (&entry->matrix);
/* Store it in the stack */
stack->stack_top = g_list_prepend (stack->stack_top, entry);
clip_state->stack_dirty = TRUE;
}
