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gdiplus: Improved GdipGetPathWorldBounds handling of both matrix and pen's effect on bounding box.

This commit is contained in:
Evan Stade 2007-07-12 19:43:03 -07:00 committed by Alexandre Julliard
parent 41a9a83890
commit 3dc17d2544
2 changed files with 58 additions and 34 deletions
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72
dlls/gdiplus/graphicspath.c
View File

@ -212,12 +212,9 @@ GpStatus WINGDIPAPI GdipGetPathTypes(GpPath *path, BYTE* types, INT count)
GpStatus WINGDIPAPI GdipGetPathWorldBounds(GpPath* path, GpRectF* bounds,
GDIPCONST GpMatrix *matrix, GDIPCONST GpPen *pen)
{
/* extrema[0] is upper left corner of bounding box,
* extrema[1] is lower right corner */
GpPointF extrema[2];
GpPointF * points;
GpPointF * points, temp_pts[4];
INT count, i;
REAL path_width;
REAL path_width = 1.0, width, height, temp, low_x, low_y, high_x, high_y;
/* Matrix and pen can be null. */
if(!path || !bounds)
@ -231,33 +228,64 @@ GpStatus WINGDIPAPI GdipGetPathWorldBounds(GpPath* path, GpRectF* bounds,
}
points = path->pathdata.Points;
extrema[0].X = extrema[1].X = points[0].X;
extrema[0].Y = extrema[1].Y = points[0].Y;
low_x = high_x = points[0].X;
low_y = high_y = points[0].Y;
for(i = 1; i < count; i++){
extrema[0].X = min(points[i].X, extrema[0].X);
extrema[0].Y = min(points[i].Y, extrema[0].Y);
extrema[1].X = max(points[i].X, extrema[1].X);
extrema[1].Y = max(points[i].Y, extrema[1].Y);
low_x = min(low_x, points[i].X);
low_y = min(low_y, points[i].Y);
high_x = max(high_x, points[i].X);
high_y = max(high_y, points[i].Y);
}
/* If matrix is non-null transform the points. */
width = high_x - low_x;
height = high_y - low_y;
/* This looks unusual but it's the only way I can imitate windows. */
if(matrix){
GdipTransformMatrixPoints((GpMatrix*)matrix, extrema, 2);
temp_pts[0].X = low_x;
temp_pts[0].Y = low_y;
temp_pts[1].X = low_x;
temp_pts[1].Y = high_y;
temp_pts[2].X = high_x;
temp_pts[2].Y = high_y;
temp_pts[3].X = high_x;
temp_pts[3].Y = low_y;
GdipTransformMatrixPoints((GpMatrix*)matrix, temp_pts, 4);
low_x = temp_pts[0].X;
low_y = temp_pts[0].Y;
for(i = 1; i < 4; i++){
low_x = min(low_x, temp_pts[i].X);
low_y = min(low_y, temp_pts[i].Y);
}
temp = width;
width = height * fabs(matrix->matrix[2]) + width * fabs(matrix->matrix[0]);
height = height * fabs(matrix->matrix[3]) + temp * fabs(matrix->matrix[1]);
}
if(pen){
path_width = pen->width * pen->miterlimit / 2.0;
extrema[0].X -= path_width;
extrema[0].Y -= path_width;
extrema[1].X += path_width;
extrema[1].Y += path_width;
path_width = pen->width / 2.0;
if(count > 2)
path_width = max(path_width, pen->width * pen->miterlimit / 2.0);
/* FIXME: this should probably also check for the startcap */
if(pen->endcap & LineCapNoAnchor)
path_width = max(path_width, pen->width * 2.2);
low_x -= path_width;
low_y -= path_width;
width += 2.0 * path_width;
height += 2.0 * path_width;
}
bounds->X = extrema[0].X;
bounds->Y = extrema[0].Y;
bounds->Width = extrema[1].X - extrema[0].X;
bounds->Height = extrema[1].Y - extrema[0].Y;
bounds->X = low_x;
bounds->Y = low_y;
bounds->Width = width;
bounds->Height = height;
return Ok;
}

4
dlls/gdiplus/tests/graphicspath.c
View File

@ -315,12 +315,10 @@ static void test_worldbounds(void)
expect(Ok, status);
GdipDeletePath(path);
todo_wine{
expectf(156.0, bounds.X);
expectf(156.0, bounds.Y);
expectf(138.0, bounds.Width);
expectf(88.0, bounds.Height);
}
line2_points[2].X = 2 * line2_points[1].X - line2_points[0].X;
line2_points[2].Y = 2 * line2_points[1].Y - line2_points[0].Y;
@ -379,13 +377,11 @@ static void test_worldbounds(void)
expect(Ok, status);
GdipDeletePath(path);
todo_wine{
expectf(-209.6, bounds.X);
expectf(-1274.8, bounds.Y);
expectf(705.0, bounds.Width);
expectf(945.0, bounds.Height);
}
}
START_TEST(graphicspath)
{