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app: clamp the return value of gimp_operation_levels_map_input()

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before putting it into 8 bit for rendering UI stuff, because the
function itself doesn't clamp any longer.
This commit is contained in:
Michael Natterer
2012-05-02 14:26:25 +02:00
parent 71d5fbe6af
commit cf43a09626
1 changed files with 20 additions and 12 deletions
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24
app/tools/gimplevelstool.c
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@ -837,6 +837,8 @@ levels_update_input_bar (GimpLevelsTool *tool)
switch (config->channel) switch (config->channel)
{ {
gdouble value;
case GIMP_HISTOGRAM_VALUE: case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA: case GIMP_HISTOGRAM_ALPHA:
case GIMP_HISTOGRAM_RGB: case GIMP_HISTOGRAM_RGB:
@ -846,9 +848,10 @@ levels_update_input_bar (GimpLevelsTool *tool)
for (i = 0; i < 256; i++) for (i = 0; i < 256; i++)
{ {
v[i] = gimp_operation_levels_map_input (config, value = gimp_operation_levels_map_input (config,
config->channel, config->channel,
i / 255.0) * 255.999; i / 255.0);
v[i] = CLAMP (value, 0.0, 1.0) * 255.999;
} }
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar), gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
@ -867,15 +870,20 @@ levels_update_input_bar (GimpLevelsTool *tool)
for (i = 0; i < 256; i++) for (i = 0; i < 256; i++)
{ {
r[i] = gimp_operation_levels_map_input (config, value = gimp_operation_levels_map_input (config,
GIMP_HISTOGRAM_RED, GIMP_HISTOGRAM_RED,
i / 255.0) * 255.999; i / 255.0);
g[i] = gimp_operation_levels_map_input (config, r[i] = CLAMP (value, 0.0, 1.0) * 255.999;
value = gimp_operation_levels_map_input (config,
GIMP_HISTOGRAM_GREEN, GIMP_HISTOGRAM_GREEN,
i / 255.0) * 255.999; i / 255.0);
b[i] = gimp_operation_levels_map_input (config, g[i] = CLAMP (value, 0.0, 1.0) * 255.999;
value = gimp_operation_levels_map_input (config,
GIMP_HISTOGRAM_BLUE, GIMP_HISTOGRAM_BLUE,
i / 255.0) * 255.999; i / 255.0);
b[i] = CLAMP (value, 0.0, 1.0) * 255.999;
} }
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar), gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),