mirror of https://github.com/GNOME/gimp.git
app/gimage_mask.c applied patch from Ben Jackson to fix fractional pixel
* app/gimage_mask.c * app/paint_core.c: applied patch from Ben Jackson to fix fractional pixel errors and reverted the old fix. * app/paint_funcs.h: changed the #defines for ERASE_MODE and REPLACE_MODE to correctly match layer_modes[] -Yosh
This commit is contained in:
Manish Singh
parent
a705770e83
commit
09a5fde1ce
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@ -1,3 +1,12 @@
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Mon Mar 23 18:08:59 PST 1998 Manish Singh <yosh@gimp.org>
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* app/gimage_mask.c
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* app/paint_core.c: applied patch from Ben Jackson to fix
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fractional pixel errors and reverted the old fix.
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* app/paint_funcs.h: changed the #defines for ERASE_MODE and
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REPLACE_MODE to correctly match layer_modes[]
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Mon Mar 23 20:51:53 1998 Owen Taylor <owt1@cornell.edu>
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* INSTALL configure.in: Added some documentation
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@ -573,33 +573,16 @@ gimage_mask_stroke (gimage, drawable)
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non_gui_paint_core.paint_func = gimage_mask_stroke_paint_func;
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gimage_mask_stroking = TRUE;
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/* Note added by Raph Levien, 27 Jan 1998
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The subtraction of 0.125 is to compensate for imprecision in
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paint_core_subsample_mask. Ben Jackson posted a patch on 14 Jan
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1998 to gimp-developers which addresses the imprecision more
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directly. However, I've chosen this quick hack instead because it
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is a less drastic change, and has no impact on performance. By
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contrast, Ben's patch builds 25 rather than 16 subsampled brush
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masks.
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I'm planning to rework the subsample mechanism anyway to make way
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for the natural brushes. When that happens, I'll be sure to make
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it round precisely, at which point these -0.125 offsets can come
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out.
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*/
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non_gui_paint_core.startx = non_gui_paint_core.lastx = (stroke_segs[0].x1 - offx) - 0.125;
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non_gui_paint_core.starty = non_gui_paint_core.lasty = (stroke_segs[0].y1 - offy) - 0.125;
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non_gui_paint_core.startx = non_gui_paint_core.lastx = (stroke_segs[0].x1 - offx);
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non_gui_paint_core.starty = non_gui_paint_core.lasty = (stroke_segs[0].y1 - offy);
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seg = 0;
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for (i = 0; i < num_strokes; i++)
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{
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while (stroke_segs[seg].x2 != -1)
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{
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non_gui_paint_core.curx = (stroke_segs[seg].x2 - offx - 0.125);
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non_gui_paint_core.cury = (stroke_segs[seg].y2 - offy - 0.125);
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non_gui_paint_core.curx = (stroke_segs[seg].x2 - offx);
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non_gui_paint_core.cury = (stroke_segs[seg].y2 - offy);
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paint_core_interpolate (&non_gui_paint_core, drawable);
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@ -573,33 +573,16 @@ gimage_mask_stroke (gimage, drawable)
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non_gui_paint_core.paint_func = gimage_mask_stroke_paint_func;
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gimage_mask_stroking = TRUE;
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/* Note added by Raph Levien, 27 Jan 1998
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The subtraction of 0.125 is to compensate for imprecision in
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paint_core_subsample_mask. Ben Jackson posted a patch on 14 Jan
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1998 to gimp-developers which addresses the imprecision more
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directly. However, I've chosen this quick hack instead because it
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is a less drastic change, and has no impact on performance. By
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contrast, Ben's patch builds 25 rather than 16 subsampled brush
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masks.
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I'm planning to rework the subsample mechanism anyway to make way
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for the natural brushes. When that happens, I'll be sure to make
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it round precisely, at which point these -0.125 offsets can come
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out.
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*/
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non_gui_paint_core.startx = non_gui_paint_core.lastx = (stroke_segs[0].x1 - offx) - 0.125;
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non_gui_paint_core.starty = non_gui_paint_core.lasty = (stroke_segs[0].y1 - offy) - 0.125;
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non_gui_paint_core.startx = non_gui_paint_core.lastx = (stroke_segs[0].x1 - offx);
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non_gui_paint_core.starty = non_gui_paint_core.lasty = (stroke_segs[0].y1 - offy);
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seg = 0;
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for (i = 0; i < num_strokes; i++)
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{
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while (stroke_segs[seg].x2 != -1)
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{
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non_gui_paint_core.curx = (stroke_segs[seg].x2 - offx - 0.125);
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non_gui_paint_core.cury = (stroke_segs[seg].y2 - offy - 0.125);
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non_gui_paint_core.curx = (stroke_segs[seg].x2 - offx);
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non_gui_paint_core.cury = (stroke_segs[seg].y2 - offy);
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paint_core_interpolate (&non_gui_paint_core, drawable);
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@ -438,8 +438,8 @@ void hls_to_rgb (int *, int *, int *);
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#define SATURATION_MODE 12
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#define COLOR_MODE 13
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#define VALUE_MODE 14
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#define ERASE_MODE 20
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#define REPLACE_MODE 21
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#define ERASE_MODE 15
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#define REPLACE_MODE 16
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/* Applying layer modes... */
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@ -68,10 +68,7 @@ static TempBuf * canvas_buf = NULL;
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/* brush buffers */
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static MaskBuf * solid_brush;
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static MaskBuf * kernel_brushes[4][4] = { {NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL}};
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static MaskBuf * kernel_brushes[5][5];
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/* paint buffers utility functions */
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@ -85,32 +82,42 @@ static void free_paint_buffers (void);
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#define KERNEL_HEIGHT 3
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/* Brush pixel subsampling kernels */
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static int subsample[4][4][9] =
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{
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{
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{ 16, 48, 0, 48, 144, 0, 0, 0, 0 },
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{ 0, 64, 0, 0, 192, 0, 0, 0, 0 },
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{ 0, 48, 16, 0, 144, 48, 0, 0, 0 },
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{ 0, 32, 32, 0, 96, 96, 0, 0, 0 },
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},
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{
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{ 0, 0, 0, 64, 192, 0, 0, 0, 0 },
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{ 0, 0, 0, 0, 256, 0, 0, 0, 0 },
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{ 0, 0, 0, 0, 192, 64, 0, 0, 0 },
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{ 0, 0, 0, 0, 128, 128, 0, 0, 0 },
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},
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{
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{ 0, 0, 0, 48, 144, 0, 16, 48, 0 },
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{ 0, 0, 0, 0, 192, 0, 0, 64, 0 },
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{ 0, 0, 0, 0, 144, 48, 0, 48, 16 },
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{ 0, 0, 0, 0, 96, 96, 0, 32, 32 },
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},
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{
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{ 0, 0, 0, 32, 96, 0, 32, 96, 0 },
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{ 0, 0, 0, 0, 128, 0, 0, 128, 0 },
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{ 0, 0, 0, 0, 96, 32, 0, 96, 32 },
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{ 0, 0, 0, 0, 64, 64, 0, 64, 64 },
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},
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static int subsample[5][5][9] = {
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{
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{ 64, 64, 0, 64, 64, 0, 0, 0, 0, },
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{ 32, 96, 0, 32, 96, 0, 0, 0, 0, },
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{ 0, 128, 0, 0, 128, 0, 0, 0, 0, },
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{ 0, 96, 32, 0, 96, 32, 0, 0, 0, },
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{ 0, 64, 64, 0, 64, 64, 0, 0, 0, },
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},
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{
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{ 32, 32, 0, 96, 96, 0, 0, 0, 0, },
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{ 16, 48, 0, 48, 144, 0, 0, 0, 0, },
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{ 0, 64, 0, 0, 192, 0, 0, 0, 0, },
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{ 0, 48, 16, 0, 144, 48, 0, 0, 0, },
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{ 0, 32, 32, 0, 96, 96, 0, 0, 0, },
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},
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{
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{ 0, 0, 0, 128, 128, 0, 0, 0, 0, },
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{ 0, 0, 0, 64, 192, 0, 0, 0, 0, },
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{ 0, 0, 0, 0, 256, 0, 0, 0, 0, },
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{ 0, 0, 0, 0, 192, 64, 0, 0, 0, },
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{ 0, 0, 0, 0, 128, 128, 0, 0, 0, },
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},
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{
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{ 0, 0, 0, 96, 96, 0, 32, 32, 0, },
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{ 0, 0, 0, 48, 144, 0, 16, 48, 0, },
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{ 0, 0, 0, 0, 192, 0, 0, 64, 0, },
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{ 0, 0, 0, 0, 144, 48, 0, 48, 16, },
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{ 0, 0, 0, 0, 96, 96, 0, 32, 32, },
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},
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{
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{ 0, 0, 0, 64, 64, 0, 64, 64, 0, },
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{ 0, 0, 0, 32, 96, 0, 32, 96, 0, },
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{ 0, 0, 0, 0, 128, 0, 0, 128, 0, },
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{ 0, 0, 0, 0, 96, 32, 0, 96, 32, },
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{ 0, 0, 0, 0, 64, 64, 0, 64, 64, },
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},
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};
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void
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@ -687,22 +694,20 @@ paint_core_subsample_mask (mask, x, y)
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int r, s;
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x += (x < 0) ? mask->width : 0;
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left = x - ((int) x);
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left = x - floor(x) + 0.125;
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index1 = (int) (left * 4);
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index1 = (index1 < 0) ? 0 : index1;
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y += (y < 0) ? mask->height : 0;
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left = y - ((int) y);
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left = y - floor(y) + 0.125;
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index2 = (int) (left * 4);
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index2 = (index2 < 0) ? 0 : index2;
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kernel = subsample[index2][index1];
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if ((mask == last_brush) && kernel_brushes[index2][index1])
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return kernel_brushes[index2][index1];
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else if (mask != last_brush)
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for (i = 0; i < 4; i++)
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for (j = 0; j < 4; j++)
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for (i = 0; i < 5; i++)
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for (j = 0; j < 5; j++)
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{
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if (kernel_brushes[i][j])
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mask_buf_free (kernel_brushes[i][j]);
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@ -438,8 +438,8 @@ void hls_to_rgb (int *, int *, int *);
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#define SATURATION_MODE 12
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#define COLOR_MODE 13
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#define VALUE_MODE 14
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#define ERASE_MODE 20
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#define REPLACE_MODE 21
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#define ERASE_MODE 15
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#define REPLACE_MODE 16
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/* Applying layer modes... */
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@ -68,10 +68,7 @@ static TempBuf * canvas_buf = NULL;
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/* brush buffers */
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static MaskBuf * solid_brush;
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static MaskBuf * kernel_brushes[4][4] = { {NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL},
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{NULL, NULL, NULL, NULL}};
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static MaskBuf * kernel_brushes[5][5];
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/* paint buffers utility functions */
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@ -85,32 +82,42 @@ static void free_paint_buffers (void);
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#define KERNEL_HEIGHT 3
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/* Brush pixel subsampling kernels */
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static int subsample[4][4][9] =
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{
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{
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{ 16, 48, 0, 48, 144, 0, 0, 0, 0 },
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{ 0, 64, 0, 0, 192, 0, 0, 0, 0 },
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{ 0, 48, 16, 0, 144, 48, 0, 0, 0 },
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{ 0, 32, 32, 0, 96, 96, 0, 0, 0 },
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},
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{
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{ 0, 0, 0, 64, 192, 0, 0, 0, 0 },
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{ 0, 0, 0, 0, 256, 0, 0, 0, 0 },
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{ 0, 0, 0, 0, 192, 64, 0, 0, 0 },
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{ 0, 0, 0, 0, 128, 128, 0, 0, 0 },
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},
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{
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{ 0, 0, 0, 48, 144, 0, 16, 48, 0 },
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{ 0, 0, 0, 0, 192, 0, 0, 64, 0 },
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{ 0, 0, 0, 0, 144, 48, 0, 48, 16 },
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{ 0, 0, 0, 0, 96, 96, 0, 32, 32 },
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},
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{
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{ 0, 0, 0, 32, 96, 0, 32, 96, 0 },
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{ 0, 0, 0, 0, 128, 0, 0, 128, 0 },
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{ 0, 0, 0, 0, 96, 32, 0, 96, 32 },
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{ 0, 0, 0, 0, 64, 64, 0, 64, 64 },
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},
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static int subsample[5][5][9] = {
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{
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{ 64, 64, 0, 64, 64, 0, 0, 0, 0, },
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{ 32, 96, 0, 32, 96, 0, 0, 0, 0, },
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{ 0, 128, 0, 0, 128, 0, 0, 0, 0, },
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{ 0, 96, 32, 0, 96, 32, 0, 0, 0, },
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{ 0, 64, 64, 0, 64, 64, 0, 0, 0, },
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},
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{
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{ 32, 32, 0, 96, 96, 0, 0, 0, 0, },
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{ 16, 48, 0, 48, 144, 0, 0, 0, 0, },
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{ 0, 64, 0, 0, 192, 0, 0, 0, 0, },
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{ 0, 48, 16, 0, 144, 48, 0, 0, 0, },
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{ 0, 32, 32, 0, 96, 96, 0, 0, 0, },
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},
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{
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{ 0, 0, 0, 128, 128, 0, 0, 0, 0, },
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{ 0, 0, 0, 64, 192, 0, 0, 0, 0, },
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{ 0, 0, 0, 0, 256, 0, 0, 0, 0, },
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{ 0, 0, 0, 0, 192, 64, 0, 0, 0, },
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{ 0, 0, 0, 0, 128, 128, 0, 0, 0, },
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},
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{
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{ 0, 0, 0, 96, 96, 0, 32, 32, 0, },
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{ 0, 0, 0, 48, 144, 0, 16, 48, 0, },
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{ 0, 0, 0, 0, 192, 0, 0, 64, 0, },
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{ 0, 0, 0, 0, 144, 48, 0, 48, 16, },
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{ 0, 0, 0, 0, 96, 96, 0, 32, 32, },
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},
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{
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{ 0, 0, 0, 64, 64, 0, 64, 64, 0, },
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{ 0, 0, 0, 32, 96, 0, 32, 96, 0, },
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{ 0, 0, 0, 0, 128, 0, 0, 128, 0, },
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{ 0, 0, 0, 0, 96, 32, 0, 96, 32, },
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{ 0, 0, 0, 0, 64, 64, 0, 64, 64, },
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},
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};
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void
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@ -687,22 +694,20 @@ paint_core_subsample_mask (mask, x, y)
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int r, s;
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x += (x < 0) ? mask->width : 0;
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left = x - ((int) x);
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left = x - floor(x) + 0.125;
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index1 = (int) (left * 4);
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index1 = (index1 < 0) ? 0 : index1;
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y += (y < 0) ? mask->height : 0;
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left = y - ((int) y);
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left = y - floor(y) + 0.125;
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index2 = (int) (left * 4);
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index2 = (index2 < 0) ? 0 : index2;
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kernel = subsample[index2][index1];
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if ((mask == last_brush) && kernel_brushes[index2][index1])
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return kernel_brushes[index2][index1];
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else if (mask != last_brush)
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for (i = 0; i < 4; i++)
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for (j = 0; j < 4; j++)
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for (i = 0; i < 5; i++)
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for (j = 0; j < 5; j++)
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{
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if (kernel_brushes[i][j])
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mask_buf_free (kernel_brushes[i][j]);
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