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Issue 3100: cage transform tool -> always blurred without any action

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Makes sure the tool doesn't offset everything by 0.5 pixels.

(cherry picked from commit 44cc7d239e)
This commit is contained in:
Massimo Valentini
2014-12-19 15:08:52 +01:00
committed by Michael Natterer
parent 34f6e75d37
commit 1fc5ff4ed0
1 changed files with 25 additions and 19 deletions
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44
app/operations/gimpoperationcagetransform.c
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@ -271,8 +271,8 @@ gimp_operation_cage_transform_process (GeglOperation *operation,
}
if (!output_set)
{
output[0] = x;
output[1] = y;
output[0] = x + 0.5;
output[1] = y + 0.5;
}
output += 2;
@ -385,8 +385,7 @@ gimp_operation_cage_transform_interpolate_source_coords_recurs (GimpOperationCag
gint recursion_depth,
gfloat *coords)
{
GeglRectangle rect = { 0, 0, 1, 1 };
gint xmin, xmax, ymin, ymax;
gint xmin, xmax, ymin, ymax, x, y;
/* Stop recursion if all 3 vertices of the triangle are outside the
* ROI (left/right or above/below).
@ -405,20 +404,24 @@ gimp_operation_cage_transform_interpolate_source_coords_recurs (GimpOperationCag
p2_d.y < roi->y &&
p3_d.y < roi->y) return;
xmin = xmax = p1_d.x;
ymin = ymax = p1_d.y;
xmin = xmax = lrint (p1_d.x);
ymin = ymax = lrint (p1_d.y);
if (xmin > p2_d.x) xmin = p2_d.x;
if (xmin > p3_d.x) xmin = p3_d.x;
x = lrint (p2_d.x);
xmin = MIN (x, xmin);
xmax = MAX (x, xmax);
if (xmax < p2_d.x) xmax = p2_d.x;
if (xmax < p3_d.x) xmax = p3_d.x;
x = lrint (p3_d.x);
xmin = MIN (x, xmin);
xmax = MAX (x, xmax);
if (ymin > p2_d.y) ymin = p2_d.y;
if (ymin > p3_d.y) ymin = p3_d.y;
y = lrint (p2_d.y);
ymin = MIN (y, ymin);
ymax = MAX (y, ymax);
if (ymax < p2_d.y) ymax = p2_d.y;
if (ymax < p3_d.y) ymax = p3_d.y;
y = lrint (p3_d.y);
ymin = MIN (y, ymin);
ymax = MAX (y, ymax);
/* test if there is no more pixel in the triangle */
if (xmin == xmax || ymin == ymax)
@ -438,11 +441,8 @@ gimp_operation_cage_transform_interpolate_source_coords_recurs (GimpOperationCag
{
gdouble a, b, c, denom, x, y;
rect.x = xmax;
rect.y = ymax;
x = (gdouble) xmax;
y = (gdouble) ymax;
x = (gdouble) xmin + 0.5;
y = (gdouble) ymin + 0.5;
denom = (p2_d.x - p1_d.x) * p3_d.y + (p1_d.x - p3_d.x) * p2_d.y + (p3_d.x - p2_d.x) * p1_d.y;
a = ((p2_d.x - x) * p3_d.y + (x - p3_d.x) * p2_d.y + (p3_d.x - p2_d.x) * y) / denom;
@ -454,6 +454,12 @@ gimp_operation_cage_transform_interpolate_source_coords_recurs (GimpOperationCag
*/
if ((a > 0 && b > 0 && c > 0) || (a < 0 && b < 0 && c < 0))
{
GeglRectangle rect = { 0, 0, 1, 1 };
gfloat coords[2];
rect.x = xmin;
rect.y = ymin;
coords[0] = (a * p1_s.x + b * p2_s.x + c * p3_s.x);
coords[1] = (a * p1_s.y + b * p2_s.y + c * p3_s.y);