[gimp] app: consolidate all transform API in gimpdisplayshell-transform.[ch]
- From: Michael Natterer <mitch src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp] app: consolidate all transform API in gimpdisplayshell-transform.[ch]
- Date: Wed, 24 Apr 2013 22:32:59 +0000 (UTC)
commit 37d589335faa178b6027f5bbf53b773d2aaa00d8
Author: Michael Natterer <mitch gimp org>
Date: Thu Apr 25 00:29:58 2013 +0200
app: consolidate all transform API in gimpdisplayshell-transform.[ch]
Added complete API for zoom/unzoom (scale and scroll) and
rotate/unrotate, with the same set of functions as the existing
transform/untransform. Moved some special case functions to the
namespaces they belong.
app/display/gimpcanvasitem.c | 11 +-
app/display/gimpdisplayshell-draw.c | 8 +-
app/display/gimpdisplayshell-items.c | 12 +-
app/display/gimpdisplayshell-rotate.c | 78 -----
app/display/gimpdisplayshell-rotate.h | 41 +--
app/display/gimpdisplayshell-selection.c | 24 +-
app/display/gimpdisplayshell-transform.c | 557 +++++++++++++++++++++++++++---
app/display/gimpdisplayshell-transform.h | 106 ++++++-
app/tools/gimpdrawtool.c | 20 +-
9 files changed, 653 insertions(+), 204 deletions(-)
---
diff --git a/app/display/gimpcanvasitem.c b/app/display/gimpcanvasitem.c
index 9e1a260..e31644b 100644
--- a/app/display/gimpcanvasitem.c
+++ b/app/display/gimpcanvasitem.c
@@ -629,18 +629,12 @@ gimp_canvas_item_transform_xy (GimpCanvasItem *item,
gint *ty)
{
GimpCanvasItemPrivate *private;
- gint64 nx;
- gint64 ny;
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
private = GET_PRIVATE (item);
- nx = x * private->shell->scale_x - private->shell->offset_x;
- ny = y * private->shell->scale_y - private->shell->offset_y;
-
- *tx = CLAMP (nx, G_MININT, G_MAXINT);
- *ty = CLAMP (ny, G_MININT, G_MAXINT);
+ gimp_display_shell_zoom_xy (private->shell, x, y, tx, ty);
}
void
@@ -656,8 +650,7 @@ gimp_canvas_item_transform_xy_f (GimpCanvasItem *item,
private = GET_PRIVATE (item);
- *tx = SCALEX (private->shell, x) - private->shell->offset_x;
- *ty = SCALEY (private->shell, y) - private->shell->offset_y;
+ gimp_display_shell_zoom_xy_f (private->shell, x, y, tx, ty);
}
diff --git a/app/display/gimpdisplayshell-draw.c b/app/display/gimpdisplayshell-draw.c
index 0e0e032..408f2ab 100644
--- a/app/display/gimpdisplayshell-draw.c
+++ b/app/display/gimpdisplayshell-draw.c
@@ -37,8 +37,8 @@
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-draw.h"
#include "gimpdisplayshell-render.h"
-#include "gimpdisplayshell-rotate.h"
#include "gimpdisplayshell-scale.h"
+#include "gimpdisplayshell-transform.h"
#include "gimpdisplayxfer.h"
@@ -149,9 +149,9 @@ gimp_display_shell_draw_image (GimpDisplayShell *shell,
gint image_width;
gint image_height;
- gimp_display_shell_rotate_untransform_bounds (shell,
- x, y, x + w, y + h,
- &tx1, &ty1, &tx2, &ty2);
+ gimp_display_shell_unrotate_bounds (shell,
+ x, y, x + w, y + h,
+ &tx1, &ty1, &tx2, &ty2);
x1 = floor (tx1 - 0.5);
y1 = floor (ty1 - 0.5);
diff --git a/app/display/gimpdisplayshell-items.c b/app/display/gimpdisplayshell-items.c
index e8fe8dd..17d63c4 100644
--- a/app/display/gimpdisplayshell-items.c
+++ b/app/display/gimpdisplayshell-items.c
@@ -34,7 +34,7 @@
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-expose.h"
#include "gimpdisplayshell-items.h"
-#include "gimpdisplayshell-rotate.h"
+#include "gimpdisplayshell-transform.h"
/* local function prototypes */
@@ -249,11 +249,11 @@ gimp_display_shell_item_update (GimpCanvasItem *item,
cairo_region_get_rectangle (region, i, &rect);
- gimp_display_shell_rotate_transform_bounds (shell,
- rect.x, rect.y,
- rect.x + rect.width,
- rect.y + rect.height,
- &tx1, &ty1, &tx2, &ty2);
+ gimp_display_shell_rotate_bounds (shell,
+ rect.x, rect.y,
+ rect.x + rect.width,
+ rect.y + rect.height,
+ &tx1, &ty1, &tx2, &ty2);
x1 = floor (tx1 - 0.5);
y1 = floor (ty1 - 0.5);
diff --git a/app/display/gimpdisplayshell-rotate.c b/app/display/gimpdisplayshell-rotate.c
index 6150069..676c5bd 100644
--- a/app/display/gimpdisplayshell-rotate.c
+++ b/app/display/gimpdisplayshell-rotate.c
@@ -24,8 +24,6 @@
#include "display-types.h"
-#include "core/gimp-utils.h"
-
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-expose.h"
@@ -149,79 +147,3 @@ gimp_display_shell_rotate_update_transform (GimpDisplayShell *shell)
shell->rotate_untransform = NULL;
}
}
-
-void
-gimp_display_shell_rotate_transform_bounds (GimpDisplayShell *shell,
- gdouble x1,
- gdouble y1,
- gdouble x2,
- gdouble y2,
- gdouble *nx1,
- gdouble *ny1,
- gdouble *nx2,
- gdouble *ny2)
-{
- gdouble tx1, ty1;
- gdouble tx2, ty2;
- gdouble tx3, ty3;
- gdouble tx4, ty4;
-
- g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
-
- tx1 = x1;
- ty1 = y1;
- tx2 = x1;
- ty2 = y2;
- tx3 = x2;
- ty3 = y1;
- tx4 = x2;
- ty4 = y2;
-
- cairo_matrix_transform_point (shell->rotate_transform, &tx1, &ty1);
- cairo_matrix_transform_point (shell->rotate_transform, &tx2, &ty2);
- cairo_matrix_transform_point (shell->rotate_transform, &tx3, &ty3);
- cairo_matrix_transform_point (shell->rotate_transform, &tx4, &ty4);
-
- *nx1 = MIN4 (tx1, tx2, tx3, tx4);
- *ny1 = MIN4 (ty1, ty2, ty3, ty4);
- *nx2 = MAX4 (tx1, tx2, tx3, tx4);
- *ny2 = MAX4 (ty1, ty2, ty3, ty4);
-}
-
-void
-gimp_display_shell_rotate_untransform_bounds (GimpDisplayShell *shell,
- gdouble x1,
- gdouble y1,
- gdouble x2,
- gdouble y2,
- gdouble *nx1,
- gdouble *ny1,
- gdouble *nx2,
- gdouble *ny2)
-{
- gdouble tx1, ty1;
- gdouble tx2, ty2;
- gdouble tx3, ty3;
- gdouble tx4, ty4;
-
- g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
-
- tx1 = x1;
- ty1 = y1;
- tx2 = x1;
- ty2 = y2;
- tx3 = x2;
- ty3 = y1;
- tx4 = x2;
- ty4 = y2;
-
- cairo_matrix_transform_point (shell->rotate_untransform, &tx1, &ty1);
- cairo_matrix_transform_point (shell->rotate_untransform, &tx2, &ty2);
- cairo_matrix_transform_point (shell->rotate_untransform, &tx3, &ty3);
- cairo_matrix_transform_point (shell->rotate_untransform, &tx4, &ty4);
-
- *nx1 = MIN4 (tx1, tx2, tx3, tx4);
- *ny1 = MIN4 (ty1, ty2, ty3, ty4);
- *nx2 = MAX4 (tx1, tx2, tx3, tx4);
- *ny2 = MAX4 (ty1, ty2, ty3, ty4);
-}
diff --git a/app/display/gimpdisplayshell-rotate.h b/app/display/gimpdisplayshell-rotate.h
index 99fb0ca..82d3cb1 100644
--- a/app/display/gimpdisplayshell-rotate.h
+++ b/app/display/gimpdisplayshell-rotate.h
@@ -19,37 +19,18 @@
#define __GIMP_DISPLAY_SHELL_ROTATE_H__
-void gimp_display_shell_rotate (GimpDisplayShell *shell,
- gdouble delta);
-void gimp_display_shell_rotate_to (GimpDisplayShell *shell,
- gdouble value);
-void gimp_display_shell_rotate_drag (GimpDisplayShell *shell,
- gdouble last_x,
- gdouble last_y,
- gdouble cur_x,
- gdouble cur_y,
- gboolean constrain);
+void gimp_display_shell_rotate (GimpDisplayShell *shell,
+ gdouble delta);
+void gimp_display_shell_rotate_to (GimpDisplayShell *shell,
+ gdouble value);
+void gimp_display_shell_rotate_drag (GimpDisplayShell *shell,
+ gdouble last_x,
+ gdouble last_y,
+ gdouble cur_x,
+ gdouble cur_y,
+ gboolean constrain);
-void gimp_display_shell_rotate_update_transform (GimpDisplayShell *shell);
-
-void gimp_display_shell_rotate_transform_bounds (GimpDisplayShell *shell,
- gdouble x1,
- gdouble y1,
- gdouble x2,
- gdouble y2,
- gdouble *nx1,
- gdouble *ny1,
- gdouble *nx2,
- gdouble *ny2);
-void gimp_display_shell_rotate_untransform_bounds (GimpDisplayShell *shell,
- gdouble x1,
- gdouble y1,
- gdouble x2,
- gdouble y2,
- gdouble *nx1,
- gdouble *ny1,
- gdouble *nx2,
- gdouble *ny2);
+void gimp_display_shell_rotate_update_transform (GimpDisplayShell *shell);
#endif /* __GIMP_DISPLAY_SHELL_ROTATE_H__ */
diff --git a/app/display/gimpdisplayshell-selection.c b/app/display/gimpdisplayshell-selection.c
index cc48fe8..0181efd 100644
--- a/app/display/gimpdisplayshell-selection.c
+++ b/app/display/gimpdisplayshell-selection.c
@@ -68,7 +68,7 @@ static void selection_undraw (Selection *selection);
static void selection_render_mask (Selection *selection);
-static void selection_transform_segs (Selection *selection,
+static void selection_zoom_segs (Selection *selection,
const GimpBoundSeg *src_segs,
GimpSegment *dest_segs,
gint n_segs);
@@ -307,18 +307,18 @@ selection_render_mask (Selection *selection)
}
static void
-selection_transform_segs (Selection *selection,
- const GimpBoundSeg *src_segs,
- GimpSegment *dest_segs,
- gint n_segs)
+selection_zoom_segs (Selection *selection,
+ const GimpBoundSeg *src_segs,
+ GimpSegment *dest_segs,
+ gint n_segs)
{
const gint xclamp = selection->shell->disp_width + 1;
const gint yclamp = selection->shell->disp_height + 1;
gint i;
- gimp_display_shell_transform_segments (selection->shell,
- src_segs, dest_segs, n_segs,
- 0.0, 0.0);
+ gimp_display_shell_zoom_segments (selection->shell,
+ src_segs, dest_segs, n_segs,
+ 0.0, 0.0);
for (i = 0; i < n_segs; i++)
{
@@ -368,8 +368,8 @@ selection_generate_segs (Selection *selection)
if (selection->n_segs_in)
{
selection->segs_in = g_new (GimpSegment, selection->n_segs_in);
- selection_transform_segs (selection, segs_in,
- selection->segs_in, selection->n_segs_in);
+ selection_zoom_segs (selection, segs_in,
+ selection->segs_in, selection->n_segs_in);
selection_render_mask (selection);
}
@@ -382,8 +382,8 @@ selection_generate_segs (Selection *selection)
if (selection->n_segs_out)
{
selection->segs_out = g_new (GimpSegment, selection->n_segs_out);
- selection_transform_segs (selection, segs_out,
- selection->segs_out, selection->n_segs_out);
+ selection_zoom_segs (selection, segs_out,
+ selection->segs_out, selection->n_segs_out);
}
else
{
diff --git a/app/display/gimpdisplayshell-transform.c b/app/display/gimpdisplayshell-transform.c
index 11aafdf..f5364fc 100644
--- a/app/display/gimpdisplayshell-transform.c
+++ b/app/display/gimpdisplayshell-transform.c
@@ -36,6 +36,509 @@
/**
+ * gimp_display_shell_zoom_coords:
+ * @shell: a #GimpDisplayShell
+ * @image_coords: image coordinates
+ * @display_coords: returns the corresponding display coordinates
+ *
+ * Zooms from image coordinates to display coordinates, so that
+ * objects can be rendered at the correct points on the display.
+ **/
+void
+gimp_display_shell_zoom_coords (const GimpDisplayShell *shell,
+ const GimpCoords *image_coords,
+ GimpCoords *display_coords)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (image_coords != NULL);
+ g_return_if_fail (display_coords != NULL);
+
+ *display_coords = *image_coords;
+
+ display_coords->x = SCALEX (shell, image_coords->x);
+ display_coords->y = SCALEY (shell, image_coords->y);
+
+ display_coords->x -= shell->offset_x;
+ display_coords->y -= shell->offset_y;
+}
+
+/**
+ * gimp_display_shell_unzoom_coords:
+ * @shell: a #GimpDisplayShell
+ * @display_coords: display coordinates
+ * @image_coords: returns the corresponding image coordinates
+ *
+ * Zooms from display coordinates to image coordinates, so that
+ * points on the display can be mapped to points in the image.
+ **/
+void
+gimp_display_shell_unzoom_coords (const GimpDisplayShell *shell,
+ const GimpCoords *display_coords,
+ GimpCoords *image_coords)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (display_coords != NULL);
+ g_return_if_fail (image_coords != NULL);
+
+ *image_coords = *display_coords;
+
+ image_coords->x += shell->offset_x;
+ image_coords->y += shell->offset_y;
+
+ image_coords->x /= shell->scale_x;
+ image_coords->y /= shell->scale_y;
+}
+
+/**
+ * gimp_display_shell_zoom_xy:
+ * @shell:
+ * @x:
+ * @y:
+ * @nx:
+ * @ny:
+ *
+ * Zooms an image coordinate to a shell coordinate.
+ **/
+void
+gimp_display_shell_zoom_xy (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gint *nx,
+ gint *ny)
+{
+ gint64 tx;
+ gint64 ty;
+
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ tx = x * shell->scale_x - shell->offset_x;
+ ty = y * shell->scale_y - shell->offset_y;
+
+ tx -= shell->offset_x;
+ ty -= shell->offset_y;
+
+ /* The projected coordinates might overflow a gint in the case of
+ * big images at high zoom levels, so we clamp them here to avoid
+ * problems.
+ */
+ *nx = CLAMP (tx, G_MININT, G_MAXINT);
+ *ny = CLAMP (ty, G_MININT, G_MAXINT);
+}
+
+/**
+ * gimp_display_shell_unzoom_xy:
+ * @shell: a #GimpDisplayShell
+ * @x: x coordinate in display coordinates
+ * @y: y coordinate in display coordinates
+ * @nx: returns x oordinate in image coordinates
+ * @ny: returns y coordinate in image coordinates
+ * @round: if %TRUE, round the results to the nearest integer;
+ * if %FALSE, simply cast them to @gint.
+ *
+ * Zoom from display coordinates to image coordinates, so that
+ * points on the display can be mapped to the corresponding points
+ * in the image.
+ **/
+void
+gimp_display_shell_unzoom_xy (const GimpDisplayShell *shell,
+ gint x,
+ gint y,
+ gint *nx,
+ gint *ny,
+ gboolean round)
+{
+ gint64 tx;
+ gint64 ty;
+
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ if (round)
+ {
+ tx = SIGNED_ROUND (((gdouble) x + shell->offset_x) / shell->scale_x);
+ ty = SIGNED_ROUND (((gdouble) y + shell->offset_y) / shell->scale_y);
+ }
+ else
+ {
+ tx = ((gint64) x + shell->offset_x) / shell->scale_x;
+ ty = ((gint64) y + shell->offset_y) / shell->scale_y;
+ }
+
+ *nx = CLAMP (tx, G_MININT, G_MAXINT);
+ *ny = CLAMP (ty, G_MININT, G_MAXINT);
+}
+
+/**
+ * gimp_display_shell_zoom_xy_f:
+ * @shell: a #GimpDisplayShell
+ * @x: image x coordinate of point
+ * @y: image y coordinate of point
+ * @nx: returned shell canvas x coordinate
+ * @ny: returned shell canvas y coordinate
+ *
+ * Zooms from image coordinates to display shell canvas
+ * coordinates.
+ **/
+void
+gimp_display_shell_zoom_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ *nx = SCALEX (shell, x) - shell->offset_x;
+ *ny = SCALEY (shell, y) - shell->offset_y;
+}
+
+/**
+ * gimp_display_shell_unzoom_xy_f:
+ * @shell: a #GimpDisplayShell
+ * @x: x coordinate in display coordinates
+ * @y: y coordinate in display coordinates
+ * @nx: place to return x coordinate in image coordinates
+ * @ny: place to return y coordinate in image coordinates
+ *
+ * This function is identical to gimp_display_shell_unzoom_xy(),
+ * except that the input and output coordinates are doubles rather than
+ * ints, and consequently there is no option related to rounding.
+ **/
+void
+gimp_display_shell_unzoom_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ *nx = (x + shell->offset_x) / shell->scale_x;
+ *ny = (y + shell->offset_y) / shell->scale_y;
+}
+
+/**
+ * gimp_display_shell_zoom_segments:
+ * @shell: a #GimpDisplayShell
+ * @src_segs: array of segments in image coordinates
+ * @dest_segs: returns the corresponding segments in display coordinates
+ * @n_segs: number of segments
+ *
+ * Zooms from image coordinates to display coordinates, so that
+ * objects can be rendered at the correct points on the display.
+ **/
+void
+gimp_display_shell_zoom_segments (const GimpDisplayShell *shell,
+ const GimpBoundSeg *src_segs,
+ GimpSegment *dest_segs,
+ gint n_segs,
+ gdouble offset_x,
+ gdouble offset_y)
+{
+ gint i;
+
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+
+ for (i = 0; i < n_segs ; i++)
+ {
+ gdouble x1, x2;
+ gdouble y1, y2;
+
+ x1 = src_segs[i].x1 + offset_x;
+ x2 = src_segs[i].x2 + offset_x;
+ y1 = src_segs[i].y1 + offset_y;
+ y2 = src_segs[i].y2 + offset_y;
+
+ dest_segs[i].x1 = SCALEX (shell, x1) - shell->offset_x;
+ dest_segs[i].x2 = SCALEX (shell, x2) - shell->offset_x;
+ dest_segs[i].y1 = SCALEY (shell, y1) - shell->offset_y;
+ dest_segs[i].y2 = SCALEY (shell, y2) - shell->offset_y;
+ }
+}
+
+/**
+ * gimp_display_shell_rotate_coords:
+ * @shell: a #GimpDisplayShell
+ * @image_coords: unrotated display coordinates
+ * @display_coords: returns the corresponding rotated display coordinates
+ *
+ * Rotates from unrotated display coordinates to rotated display
+ * coordinates, so that objects can be rendered at the correct points
+ * on the display.
+ **/
+void
+gimp_display_shell_rotate_coords (const GimpDisplayShell *shell,
+ const GimpCoords *unrotated_coords,
+ GimpCoords *rotated_coords)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (unrotated_coords != NULL);
+ g_return_if_fail (rotated_coords != NULL);
+
+ *rotated_coords = *rotated_coords;
+
+ if (shell->rotate_transform)
+ cairo_matrix_transform_point (shell->rotate_transform,
+ &rotated_coords->x,
+ &rotated_coords->y);
+}
+
+/**
+ * gimp_display_shell_unrotate_coords:
+ * @shell: a #GimpDisplayShell
+ * @display_coords: rotated display coordinates
+ * @image_coords: returns the corresponding unrotated display coordinates
+ *
+ * Rotates from rotated display coordinates to unrotated display coordinates.
+ **/
+void
+gimp_display_shell_unrotate_coords (const GimpDisplayShell *shell,
+ const GimpCoords *rotated_coords,
+ GimpCoords *unrotated_coords)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (rotated_coords != NULL);
+ g_return_if_fail (unrotated_coords != NULL);
+
+ *unrotated_coords = *rotated_coords;
+
+ if (shell->rotate_untransform)
+ cairo_matrix_transform_point (shell->rotate_untransform,
+ &unrotated_coords->x,
+ &unrotated_coords->y);
+}
+
+/**
+ * gimp_display_shell_rotate_xy:
+ * @shell:
+ * @x:
+ * @y:
+ * @nx:
+ * @ny:
+ *
+ * Rotates an unrotated display coordinate to a rotated shell coordinate.
+ **/
+void
+gimp_display_shell_rotate_xy (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gint *nx,
+ gint *ny)
+{
+ gint64 tx;
+ gint64 ty;
+
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ if (shell->rotate_transform)
+ cairo_matrix_transform_point (shell->rotate_transform, &x, &y);
+
+ tx = x;
+ ty = y;
+
+ /* The projected coordinates might overflow a gint in the case of
+ * big images at high zoom levels, so we clamp them here to avoid
+ * problems.
+ */
+ *nx = CLAMP (tx, G_MININT, G_MAXINT);
+ *ny = CLAMP (ty, G_MININT, G_MAXINT);
+}
+
+/**
+ * gimp_display_shell_unrotate_xy:
+ * @shell: a #GimpDisplayShell
+ * @x: x coordinate in rotated display coordinates
+ * @y: y coordinate in rotated display coordinates
+ * @nx: returns x oordinate in unrotated display coordinates
+ * @ny: returns y coordinate in unrotated display coordinates
+ *
+ * Rotate from rotated display coordinates to unrotated display
+ * coordinates.
+ **/
+void
+gimp_display_shell_unrotate_xy (const GimpDisplayShell *shell,
+ gint x,
+ gint y,
+ gint *nx,
+ gint *ny)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ if (shell->rotate_untransform)
+ {
+ gdouble fx = x;
+ gdouble fy = y;
+
+ cairo_matrix_transform_point (shell->rotate_untransform, &fy, &fy);
+
+ *nx = CLAMP (fx, G_MININT, G_MAXINT);
+ *ny = CLAMP (fy, G_MININT, G_MAXINT);
+ }
+ else
+ {
+ *nx = x;
+ *ny = y;
+ }
+}
+
+/**
+ * gimp_display_shell_rotate_xy_f:
+ * @shell: a #GimpDisplayShell
+ * @x: image x coordinate of point
+ * @y: image y coordinate of point
+ * @nx: returned shell canvas x coordinate
+ * @ny: returned shell canvas y coordinate
+ *
+ * Rotates from untransformed display coordinates to rotated display
+ * coordinates.
+ **/
+void
+gimp_display_shell_rotate_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ *nx = x;
+ *ny = y;
+
+ if (shell->rotate_transform)
+ cairo_matrix_transform_point (shell->rotate_transform, nx, ny);
+}
+
+/**
+ * gimp_display_shell_unrotate_xy_f:
+ * @shell: a #GimpDisplayShell
+ * @x: x coordinate in rotated display coordinates
+ * @y: y coordinate in rotated display coordinates
+ * @nx: place to return x coordinate in unrotated display coordinates
+ * @ny: place to return y coordinate in unrotated display coordinates
+ *
+ * This function is identical to gimp_display_shell_unrotate_xy(),
+ * except that the input and output coordinates are doubles rather
+ * than ints.
+ **/
+void
+gimp_display_shell_unrotate_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (nx != NULL);
+ g_return_if_fail (ny != NULL);
+
+ *nx = x;
+ *ny = y;
+
+ if (shell->rotate_untransform)
+ cairo_matrix_transform_point (shell->rotate_untransform, nx, ny);
+}
+
+void
+gimp_display_shell_rotate_bounds (GimpDisplayShell *shell,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2,
+ gdouble *nx1,
+ gdouble *ny1,
+ gdouble *nx2,
+ gdouble *ny2)
+{
+
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+
+ if (shell->rotate_transform)
+ {
+ gdouble tx1 = x1;
+ gdouble ty1 = y1;
+ gdouble tx2 = x1;
+ gdouble ty2 = y2;
+ gdouble tx3 = x2;
+ gdouble ty3 = y1;
+ gdouble tx4 = x2;
+ gdouble ty4 = y2;
+
+ cairo_matrix_transform_point (shell->rotate_transform, &tx1, &ty1);
+ cairo_matrix_transform_point (shell->rotate_transform, &tx2, &ty2);
+ cairo_matrix_transform_point (shell->rotate_transform, &tx3, &ty3);
+ cairo_matrix_transform_point (shell->rotate_transform, &tx4, &ty4);
+
+ *nx1 = MIN4 (tx1, tx2, tx3, tx4);
+ *ny1 = MIN4 (ty1, ty2, ty3, ty4);
+ *nx2 = MAX4 (tx1, tx2, tx3, tx4);
+ *ny2 = MAX4 (ty1, ty2, ty3, ty4);
+ }
+ else
+ {
+ *nx1 = x1;
+ *ny1 = y1;
+ *nx2 = x2;
+ *ny2 = y2;
+ }
+}
+
+void
+gimp_display_shell_unrotate_bounds (GimpDisplayShell *shell,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2,
+ gdouble *nx1,
+ gdouble *ny1,
+ gdouble *nx2,
+ gdouble *ny2)
+{
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+
+ if (shell->rotate_untransform)
+ {
+ gdouble tx1 = x1;
+ gdouble ty1 = y1;
+ gdouble tx2 = x1;
+ gdouble ty2 = y2;
+ gdouble tx3 = x2;
+ gdouble ty3 = y1;
+ gdouble tx4 = x2;
+ gdouble ty4 = y2;
+
+ cairo_matrix_transform_point (shell->rotate_untransform, &tx1, &ty1);
+ cairo_matrix_transform_point (shell->rotate_untransform, &tx2, &ty2);
+ cairo_matrix_transform_point (shell->rotate_untransform, &tx3, &ty3);
+ cairo_matrix_transform_point (shell->rotate_untransform, &tx4, &ty4);
+
+ *nx1 = MIN4 (tx1, tx2, tx3, tx4);
+ *ny1 = MIN4 (ty1, ty2, ty3, ty4);
+ *nx2 = MAX4 (tx1, tx2, tx3, tx4);
+ *ny2 = MAX4 (ty1, ty2, ty3, ty4);
+ }
+ else
+ {
+ *nx1 = x1;
+ *ny1 = y1;
+ *nx2 = x2;
+ *ny2 = y2;
+ }
+}
+
+/**
* gimp_display_shell_transform_coords:
* @shell: a #GimpDisplayShell
* @image_coords: image coordinates
@@ -126,19 +629,24 @@ gimp_display_shell_transform_xy (const GimpDisplayShell *shell,
tx = x * shell->scale_x - shell->offset_x;
ty = y * shell->scale_y - shell->offset_y;
+ tx -= shell->offset_x;
+ ty -= shell->offset_y;
+
if (shell->rotate_transform)
{
gdouble fx = tx;
gdouble fy = ty;
- cairo_matrix_transform_point (shell->rotate_transform, &fy, &fy);
+ cairo_matrix_transform_point (shell->rotate_transform, &fx, &fy);
tx = fx;
ty = fy;
}
- /* The projected coordinates might overflow a gint in the case of big
- images at high zoom levels, so we clamp them here to avoid problems. */
+ /* The projected coordinates might overflow a gint in the case of
+ * big images at high zoom levels, so we clamp them here to avoid
+ * problems.
+ */
*nx = CLAMP (tx, G_MININT, G_MAXINT);
*ny = CLAMP (ty, G_MININT, G_MAXINT);
}
@@ -185,8 +693,8 @@ gimp_display_shell_untransform_xy (const GimpDisplayShell *shell,
if (round)
{
- tx = SIGNED_ROUND (((gint64) x + shell->offset_x) / shell->scale_x);
- ty = SIGNED_ROUND (((gint64) y + shell->offset_y) / shell->scale_y);
+ tx = SIGNED_ROUND (((gdouble) x + shell->offset_x) / shell->scale_x);
+ ty = SIGNED_ROUND (((gdouble) y + shell->offset_y) / shell->scale_y);
}
else
{
@@ -340,45 +848,6 @@ gimp_display_shell_untransform_bounds (const GimpDisplayShell *shell,
}
/**
- * gimp_display_shell_transform_segments:
- * @shell: a #GimpDisplayShell
- * @src_segs: array of segments in image coordinates
- * @dest_segs: returns the corresponding segments in display coordinates
- * @n_segs: number of segments
- *
- * Transforms from image coordinates to display coordinates, so that
- * objects can be rendered at the correct points on the display.
- **/
-void
-gimp_display_shell_transform_segments (const GimpDisplayShell *shell,
- const GimpBoundSeg *src_segs,
- GimpSegment *dest_segs,
- gint n_segs,
- gdouble offset_x,
- gdouble offset_y)
-{
- gint i;
-
- g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
-
- for (i = 0; i < n_segs ; i++)
- {
- gdouble x1, x2;
- gdouble y1, y2;
-
- x1 = src_segs[i].x1 + offset_x;
- x2 = src_segs[i].x2 + offset_x;
- y1 = src_segs[i].y1 + offset_y;
- y2 = src_segs[i].y2 + offset_y;
-
- dest_segs[i].x1 = SCALEX (shell, x1) - shell->offset_x;
- dest_segs[i].x2 = SCALEX (shell, x2) - shell->offset_x;
- dest_segs[i].y1 = SCALEY (shell, y1) - shell->offset_y;
- dest_segs[i].y2 = SCALEY (shell, y2) - shell->offset_y;
- }
-}
-
-/**
* gimp_display_shell_untransform_viewport:
* @shell: a #GimpDisplayShell
* @x: returns image x coordinate of display upper left corner
diff --git a/app/display/gimpdisplayshell-transform.h b/app/display/gimpdisplayshell-transform.h
index ead1cdb..f365236 100644
--- a/app/display/gimpdisplayshell-transform.h
+++ b/app/display/gimpdisplayshell-transform.h
@@ -19,6 +19,105 @@
#define __GIMP_DISPLAY_SHELL_TRANSFORM_H__
+/* zoom: functions to transform from image space to unrotated display
+ * space and back, taking into account scroll offset and scale
+ */
+
+void gimp_display_shell_zoom_coords (const GimpDisplayShell *shell,
+ const GimpCoords *image_coords,
+ GimpCoords *display_coords);
+void gimp_display_shell_unzoom_coords (const GimpDisplayShell *shell,
+ const GimpCoords *display_coords,
+ GimpCoords *image_coords);
+
+void gimp_display_shell_zoom_xy (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gint *nx,
+ gint *ny);
+void gimp_display_shell_unzoom_xy (const GimpDisplayShell *shell,
+ gint x,
+ gint y,
+ gint *nx,
+ gint *ny,
+ gboolean round);
+
+void gimp_display_shell_zoom_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny);
+void gimp_display_shell_unzoom_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny);
+
+void gimp_display_shell_zoom_segments (const GimpDisplayShell *shell,
+ const GimpBoundSeg *src_segs,
+ GimpSegment *dest_segs,
+ gint n_segs,
+ gdouble offset_x,
+ gdouble offset_y);
+
+
+/* rotate: functions to transform from unrotated but zoomed display
+ * space to rotated display space and back
+ */
+
+void gimp_display_shell_rotate_coords (const GimpDisplayShell *shell,
+ const GimpCoords *image_coords,
+ GimpCoords *display_coords);
+void gimp_display_shell_unrotate_coords (const GimpDisplayShell *shell,
+ const GimpCoords *display_coords,
+ GimpCoords *image_coords);
+
+void gimp_display_shell_rotate_xy (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gint *nx,
+ gint *ny);
+void gimp_display_shell_unrotate_xy (const GimpDisplayShell *shell,
+ gint x,
+ gint y,
+ gint *nx,
+ gint *ny);
+
+void gimp_display_shell_rotate_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny);
+void gimp_display_shell_unrotate_xy_f (const GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble *nx,
+ gdouble *ny);
+
+void gimp_display_shell_rotate_bounds (GimpDisplayShell *shell,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2,
+ gdouble *nx1,
+ gdouble *ny1,
+ gdouble *nx2,
+ gdouble *ny2);
+void gimp_display_shell_unrotate_bounds (GimpDisplayShell *shell,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2,
+ gdouble *nx1,
+ gdouble *ny1,
+ gdouble *nx2,
+ gdouble *ny2);
+
+
+/* transform: functions to transform from image space to rotated display
+ * space and back, taking into account scroll offset, scale, and rotation
+ */
+
void gimp_display_shell_transform_coords (const GimpDisplayShell *shell,
const GimpCoords *image_coords,
GimpCoords *display_coords);
@@ -68,13 +167,6 @@ void gimp_display_shell_untransform_bounds (const GimpDisplayShell *shell,
gdouble *nx2,
gdouble *ny2);
-void gimp_display_shell_transform_segments (const GimpDisplayShell *shell,
- const GimpBoundSeg *src_segs,
- GimpSegment *dest_segs,
- gint n_segs,
- gdouble offset_x,
- gdouble offset_y);
-
void gimp_display_shell_untransform_viewport (const GimpDisplayShell *shell,
gint *x,
gint *y,
diff --git a/app/tools/gimpdrawtool.c b/app/tools/gimpdrawtool.c
index 6182812..48b6614 100644
--- a/app/tools/gimpdrawtool.c
+++ b/app/tools/gimpdrawtool.c
@@ -1009,20 +1009,12 @@ gimp_draw_tool_on_handle (GimpDrawTool *draw_tool,
shell = gimp_display_get_shell (display);
- gimp_display_shell_transform_xy_f (shell,
- x, y,
- &tx, &ty);
- gimp_display_shell_transform_xy_f (shell,
- handle_x, handle_y,
- &handle_tx, &handle_ty);
-
- if (shell->rotate_untransform)
- {
- cairo_matrix_transform_point (shell->rotate_untransform,
- &tx, &ty);
- cairo_matrix_transform_point (shell->rotate_untransform,
- &handle_tx, &handle_ty);
- }
+ gimp_display_shell_zoom_xy_f (shell,
+ x, y,
+ &tx, &ty);
+ gimp_display_shell_zoom_xy_f (shell,
+ handle_x, handle_y,
+ &handle_tx, &handle_ty);
switch (type)
{
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