coordinates.h

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#ifndef DT_IOP_DRAWLAYER_COORDINATES_H
#define DT_IOP_DRAWLAYER_COORDINATES_H
 
#include "iop/drawlayer/brush.h"       // dt_drawlayer_brush_dab_t
#include "develop/imageop.h"           // dt_iop_module_t, dt_iop_roi_t
 
 
typedef struct drawlayer_view_patch_t
{
  int x;
  int y;
  int width;
  int height;
} drawlayer_view_patch_t;
 
typedef struct drawlayer_view_patch_info_t
{
  drawlayer_view_patch_t patch;
  float layer_x0;
  float layer_y0;
  float layer_x1;
  float layer_y1;
} drawlayer_view_patch_info_t;
 
typedef struct dt_drawlayer_raw_placement_t
{
  int offset_x, offset_y;   
  gboolean valid;
} dt_drawlayer_raw_placement_t;
 
gboolean dt_drawlayer_layer_canvas_for_pipe(dt_iop_module_t *self, const struct dt_dev_pixelpipe_t *pipe,
                                            int *width, int *height);
 
gboolean dt_drawlayer_layer_canvas(dt_iop_module_t *self, int *width, int *height);
 
gboolean dt_drawlayer_raw_placement_for_frame(dt_iop_module_t *self, const struct dt_dev_pixelpipe_t *pipe,
                                              const dt_iop_roi_t *frame,
                                              dt_drawlayer_raw_placement_t *placement);
 
gboolean dt_drawlayer_raw_placement_gui(dt_iop_module_t *self, dt_drawlayer_raw_placement_t *placement,
                                        int *frame_width, int *frame_height);
 
gboolean dt_drawlayer_widget_points_to_layer_coords(dt_iop_module_t *self, float *pts, int count);
gboolean dt_drawlayer_layer_points_to_widget_coords(dt_iop_module_t *self, float *pts, int count);
gboolean dt_drawlayer_widget_to_layer_coords(dt_iop_module_t *self, double wx, double wy, float *lx, float *ly);
gboolean dt_drawlayer_layer_to_widget_coords(dt_iop_module_t *self, float x, float y, float *wx, float *wy);
gboolean dt_drawlayer_layer_bounds_to_widget_bounds(dt_iop_module_t *self, float x0, float y0,
                                                    float x1, float y1,
                                                    float *left, float *top,
                                                    float *right, float *bottom);
float dt_drawlayer_widget_brush_radius(dt_iop_module_t *self, const dt_drawlayer_brush_dab_t *dab, float fallback);
float dt_drawlayer_current_live_padding(dt_iop_module_t *self);
gboolean dt_drawlayer_compute_view_patch(dt_iop_module_t *self, float padding, drawlayer_view_patch_info_t *view);
#endif // DT_IOP_DRAWLAYER_COORDINATES_H