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show colors in status bar in the correct range (Gamma + RGB range)

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This commit is contained in:
Thomas Bernard 2019-06-09 20:32:44 +02:00
parent 11004d048a
commit db5feb25b6
3 changed files with 18 additions and 6 deletions
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5
src/engine.c
View File

@ -53,6 +53,7 @@
#include "io.h"
#include "pxsimple.h"
#include "oldies.h"
#include "palette.h"
#if defined(__GP2X__) || defined(__WIZ__) || defined(__CAANOO__) || defined(__SWITCH__)
// We don't want to underline the keyboard shortcuts as there is no keyboard
@ -589,7 +590,9 @@ void Status_print_palette_color(byte color)
i = snprintf(str, sizeof(str), "%s%d (%d,%d,%d)",
Buttons_Pool[BUTTON_CHOOSE_COL].Tooltip, color,
Main.palette[color].R,Main.palette[color].G,Main.palette[color].B);
Encode_component(Main.palette[color].R),
Encode_component(Main.palette[color].G),
Encode_component(Main.palette[color].B));
// Pad spaces
while(i<24)
str[i++]=' ';

15
src/palette.c
View File

@ -40,6 +40,8 @@
#include "palette.h"
#include "shade.h"
static void Component_unit(int count);
static byte Palette_view_is_RGB = 1; // Indique si on est en HSL ou en RGB
static float Gamma = 1.0;
@ -67,7 +69,10 @@ int Color_halfstep=0;
void Set_palette_RGB_scale(int scale)
{
if (scale>= 2 && scale <= 256)
{
RGB_scale = scale;
Component_unit(RGB_scale);
}
}
int Get_palette_RGB_scale(void)
@ -108,16 +113,16 @@ byte Round_palette_component(byte comp)
/// otherwise the rounding will be "down".
static int Decode_component(int comp)
{
float res = pow((float)comp/Color_max,1/Gamma)*255;
double res = pow((double)comp/Color_max, 1.0/Gamma) * 255.0;
return (int)res;
}
/// Turns a RGB component from 0-255 to 0-(RGB_scale-1) and apply Gamma correction.
static int Encode_component(int comp)
int Encode_component(int comp)
{
float res = pow(comp/255.0,Gamma)*Color_max;
return ceil(res);
double res = pow(comp/255.0, Gamma) * (double)Color_max;
return (int)ceil(res);
}
@ -135,7 +140,7 @@ static int Add_encoded(int comp, int offset)
// Définir les unités pour les graduations R G B ou H S V
void Component_unit(int count)
static void Component_unit(int count)
{
Color_count = count;
Color_max = count-1;

4
src/palette.h
View File

@ -41,6 +41,10 @@ void Set_palette_Gamma(int);
/// Returns the resulting value, in the [0-255] range.
byte Round_palette_component(byte comp);
/// Turns a RGB component from 0-255 to 0-(RGB_scale-1)
/// with Gamma correction.
int Encode_component(int comp);
/*!
Adds 4 menu colors in the current palette.
@param color_usage An up-to-date color usage table (byte[256]) (read only)