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Brush distort: Fix a big remapping bug that often caused the brush to disappear entirely after distort (all color zero)

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@2010 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Yves Rizoud 2012-09-25 22:52:58 +00:00
parent 69f24bc69f
commit 007f15b657
1 changed files with 4 additions and 1 deletions
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5
src/brush.c
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@ -1462,6 +1462,7 @@ int Min4(long int a, long int b, long int c, long int d)
// That's a lot of globals, but it saves stack space in the recursive calls.
static Func_pixel Pixel_for_distort;
static byte * Distort_source;
static byte * Distort_buffer;
static short Distort_buffer_width;
@ -1514,7 +1515,7 @@ void Draw_brush_linear_distort(unsigned long int tex_min_x,
{
if ((min_x<(max_x&0x7FFF0000)) && (min_y<(max_y&0x7FFF0000)))
{
color=Read_pixel_from_brush((tex_min_x)>>16,(tex_min_y)>>16);
color=*(Distort_source + (tex_min_y>>16)*Brush_width + (tex_min_x>>16));
if (color!=Back_color)
Pixel_for_distort(min_x>>16,min_y>>16,color);
}
@ -1584,6 +1585,7 @@ void Draw_brush_linear_distort(unsigned long int tex_min_x,
void Distort_brush_preview(short x1, short y1, short x2, short y2, short x3, short y3, short x4, short y4)
{
Pixel_for_distort=Pixel_figure_preview;
Distort_source=Brush; // show pixels from currently-remapped brush
Draw_brush_linear_distort(0, 0, (Brush_width<<16), (Brush_height<<16), (x1<<16), (y1<<16), (x2<<16), (y2<<16), (x3<<16), (y3<<16), (x4<<16), (y4<<16));
}
@ -1626,6 +1628,7 @@ void Distort_brush(short x1, short y1, short x2, short y2, short x3, short y3, s
// Call distort routine
Pixel_for_distort=Pixel_in_distort_buffer;
Distort_source=Brush_original_pixels; // alter pixels before remapping
Distort_buffer=new_brush;
Distort_buffer_width=width;
Draw_brush_linear_distort(0, 0, (Brush_width<<16), (Brush_height<<16), (x1<<16), (y1<<16), (x2<<16), (y2<<16), (x3<<16), (y3<<16), (x4<<16), (y4<<16));