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Fix T48169: 1 pixel offset painting 2D textures 

Painting at negative locations was using int-rounding.
This commit is contained in:
Campbell Barton 2016-05-03 17:49:18 +10:00
parent ead2496e67
commit c2f28864d6
Notes: blender-bot 2023-02-14 10:37:50 +01:00 
Referenced by issue #48169, Texture paint strangeness on left and bottom edge of painted image
1 changed files with 8 additions and 8 deletions
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16
source/blender/editors/sculpt_paint/paint_image_2d.c
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@ -302,8 +302,8 @@ static void brush_painter_mask_imbuf_partial_update(BrushPainter *painter, const
srcx = srcy = 0;
w = cache->tex_mask_old_w;
h = cache->tex_mask_old_h;
destx = (int)painter->lastpaintpos[0] - (int)pos[0] + (diameter / 2 - w / 2);
desty = (int)painter->lastpaintpos[1] - (int)pos[1] + (diameter / 2 - h / 2);
destx = (int)floorf(painter->lastpaintpos[0]) - (int)floorf(pos[0]) + (diameter / 2 - w / 2);
desty = (int)floorf(painter->lastpaintpos[1]) - (int)floorf(pos[1]) + (diameter / 2 - h / 2);
/* hack, use temporary rects so that clipping works */
IMB_rectclip(&maskibuf, &maskibuf_old, &destx, &desty, &srcx, &srcy, &w, &h);
@ -570,8 +570,8 @@ static void brush_painter_imbuf_partial_update(BrushPainter *painter, const floa
srcx = srcy = 0;
w = oldtexibuf->x;
h = oldtexibuf->y;
destx = (int)painter->lastpaintpos[0] - (int)pos[0] + (diameter / 2 - w / 2);
desty = (int)painter->lastpaintpos[1] - (int)pos[1] + (diameter / 2 - h / 2);
destx = (int)floorf(painter->lastpaintpos[0]) - (int)floorf(pos[0]) + (diameter / 2 - w / 2);
desty = (int)floorf(painter->lastpaintpos[1]) - (int)floorf(pos[1]) + (diameter / 2 - h / 2);
IMB_rectclip(cache->texibuf, oldtexibuf, &destx, &desty, &srcx, &srcy, &w, &h);
}
@ -641,8 +641,8 @@ static void brush_painter_2d_tex_mapping(ImagePaintState *s, int diameter, const
mapping->ymax = 1.0f;
}
else /* if (mapmode == MTEX_MAP_MODE_TILED) */ {
mapping->xmin = (int)(-diameter * 0.5) + (int)pos[0] - (int)startpos[0];
mapping->ymin = (int)(-diameter * 0.5) + (int)pos[1] - (int)startpos[1];
mapping->xmin = (int)(-diameter * 0.5) + (int)floorf(pos[0]) - (int)floorf(startpos[0]);
mapping->ymin = (int)(-diameter * 0.5) + (int)floorf(pos[1]) - (int)floorf(startpos[1]);
mapping->xmax = 1.0f;
mapping->ymax = 1.0f;
}
@ -758,8 +758,8 @@ static void brush_painter_2d_refresh_cache(ImagePaintState *s, BrushPainter *pai
}
else if (do_partial_update) {
/* do only partial update of texture */
int dx = (int)painter->lastpaintpos[0] - (int)pos[0];
int dy = (int)painter->lastpaintpos[1] - (int)pos[1];
int dx = (int)floorf(painter->lastpaintpos[0]) - (int)floorf(pos[0]);
int dy = (int)floorf(painter->lastpaintpos[1]) - (int)floorf(pos[1]);
if ((dx != 0) || (dy != 0)) {
brush_painter_imbuf_partial_update(painter, pos, diameter);