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Fix #31266: Track preview is shifted by half a pixel

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Sergey Sharybin
2012-05-03 10:40:04 +00:00
parent 3ee4be913b
commit 56d22457e3
1 changed files with 5 additions and 2 deletions
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7
source/blender/editors/interface/interface_draw.c
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@@ -1469,8 +1469,11 @@ static ImBuf *scale_trackpreview_ibuf(ImBuf *ibuf, float track_pos[2], int width
ImBuf *scaleibuf;
const float scalex = ((float)ibuf->x - 2 * margin) / width;
const float scaley = ((float)ibuf->y - 2 * margin) / height;
float off_x = (int)track_pos[0] - track_pos[0] + 0.5f;
float off_y = (int)track_pos[1] - track_pos[1] + 0.5f;
/* NOTE: 1.0f = 0.5f for integer coordinate coorrection (center of pixel vs. left bottom corner of bixel)
* and 0.5f for centering image in preview (cross is draving at exact center of widget so image
* should be shifted by half of pixel for correct centering) - sergey */
float off_x = (int)track_pos[0] - track_pos[0] + 1.0f;
float off_y = (int)track_pos[1] - track_pos[1] + 1.0f;
int x, y;
scaleibuf = IMB_allocImBuf(width, height, 32, IB_rect);