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Added an histogram window to see the color usage

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1437 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Adrien Destugues 2010-04-04 10:35:37 +00:00
parent e1f8e2837a
commit f6ecbb24ea
1 changed files with 51 additions and 3 deletions
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54
src/palette.c
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@ -760,6 +760,55 @@ void Draw_all_palette_sliders(T_Scroller_button * red_slider,
}
void Window_Histogram(unsigned char block_start, unsigned char block_end, dword* color_usage)
{
int i;
unsigned int max_count = 0;
/* Draws an histogram of the selected range in a separate window */
if (block_start == block_end) {
// only one color selected, do an histogram for the full range instead
block_start = 0;
block_end = 255;
}
// Normalize the histogram towards the most used color
// Step 1 : find the most used color in the range
for(i=block_start; i<= block_end; i++) {
if(color_usage[i] > max_count) max_count = color_usage[i];
}
if (max_count == 0) {
Warning_message("All these colors are unused!");
return;
}
Open_window(263, 140, "Histogram");
Window_set_normal_button(120, 120, 42, 14, "Close",-1,1,SDLK_RETURN);
// Step 2 : draw bars
for(i=block_start; i<= block_end; i++) {
Block(
ToWinX(3+i*256/(block_end-block_start+1)),
ToWinY(117-100*color_usage[i]/max_count),
ToWinL(256/(block_end-block_start+1)),
ToWinH(100*color_usage[i]/max_count), i);
if (i == MC_Light)
Block(
ToWinX(3+i*256/(block_end-block_start+1)),
ToWinY(117-100*color_usage[i]/max_count),
ToWinL(256/(block_end-block_start+1)),
ToWinH(1),MC_Black);
}
Update_window_area(0,0,263,140);
Display_cursor();
while(Window_clicked_button() != 1);
Close_window();
Display_cursor();
}
void Button_Palette(void)
{
static short reduce_colors_number = 256;
@ -1517,9 +1566,8 @@ void Button_Palette(void)
need_to_remap=1;
break;
case 15 : // Used
if (used_colors==-1)
Update_color_count(&used_colors,color_usage);
case 15 : // Used > open histogram
Window_Histogram(block_start, block_end, color_usage);
break;
case 16 : // Zap unused