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Eliminated about 96 floating-point divides per frame in the persective 

2004-11-14  Philip Lafleur  <plafleur@cvs.gnome.org>

	* app/display/gimpdisplayshell-preview.c: Eliminated about 96
	floating-point divides per frame in the persective preview.
This commit is contained in:
Philip Lafleur 2004-11-14 09:27:34 +00:00 committed by Philip Lafleur
parent 5d01581069
commit 50833de419
2 changed files with 15 additions and 8 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2004-11-14 Philip Lafleur <plafleur@cvs.gnome.org>
* app/display/gimpdisplayshell-preview.c: Eliminated about 96
floating-point divides per frame in the persective preview.
2004-11-13 Manish Singh <yosh@gimp.org>
Fix a bunch of warnings from Sparse:

18
app/display/gimpdisplayshell-preview.c
View File

@ -131,6 +131,7 @@ gimp_display_shell_preview_transform (GimpDisplayShell *shell)
gint mask_offx, mask_offy;
gint columns, rows;
gint col, row;
gfloat du, dv, dx, dy;
mask = NULL;
mask_offx = mask_offy = 0;
@ -162,6 +163,11 @@ gimp_display_shell_preview_transform (GimpDisplayShell *shell)
rows = 1;
}
dx = (tr_tool->x2 - tr_tool->x1) / ((gfloat) columns);
dy = (tr_tool->y2 - tr_tool->y1) / ((gfloat) rows);
du = (mask_x2 - mask_x1) / ((gfloat) columns);
dv = (mask_y2 - mask_y1) / ((gfloat) rows);
for (row = 0; row < rows; row++)
{
for (col = 0; col < columns; col++)
@ -175,10 +181,8 @@ gimp_display_shell_preview_transform (GimpDisplayShell *shell)
for (j = 0; j < 2; j++)
for (i = 0; i < 2; i++)
{
u [j*2+i] = tr_tool->x1 + ((tr_tool->x2 - tr_tool->x1) *
(col + j)) / ((gfloat) columns);
v [j*2+i] = tr_tool->y1 + ((tr_tool->y2 - tr_tool->y1) *
(row + i)) / ((gfloat) rows);
u [j*2+i] = tr_tool->x1 + (dx * (col + j));
v [j*2+i] = tr_tool->y1 + (dy * (row + i));
}
/* transform source coordinates to display coordinates
@ -205,10 +209,8 @@ gimp_display_shell_preview_transform (GimpDisplayShell *shell)
for (j = 0; j < 2; j++)
for (i = 0; i < 2; i++)
{
u [j*2+i] = mask_x1 + ((mask_x2 - mask_x1) * (col + j)) /
((gfloat) columns);
v [j*2+i] = mask_y1 + ((mask_y2 - mask_y1) * (row + i)) /
((gfloat) rows);
u [j*2+i] = mask_x1 + (du * (col + j));
v [j*2+i] = mask_y1 + (dv * (row + i));
}
gimp_display_shell_draw_quad (tool->drawable,