32b3996cb8
Particularly useful when working for platforms with non-linear palettes. For example the Thomson TO8 has a Gamma correction of 2.8, so the darkest shade of color is already very bright. It is important to take this into account when drawing pictures to avoid bad surprises when showing them on the real machine. The setting is available from the command line, or from the extended palette window, which gets a little relayout using horizontal sliders now that these are available.
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
/* vim:expandtab:ts=2 sw=2:
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*/
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/* Grafx2 - The Ultimate 256-color bitmap paint program
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Copyright 2007 Adrien Destugues
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Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
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Grafx2 is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2
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of the License.
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Grafx2 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Grafx2; if not, see <http://www.gnu.org/licenses/>
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*/
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//////////////////////////////////////////////////////////////////////////////
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///@file palette.h
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/// Palette screen, and some palette-related high-level functions.
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//////////////////////////////////////////////////////////////////////////////
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/// Open the palette menu and handles everything inside it.
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void Button_Palette(void);
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/// Open the secondary palette menu and handles it.
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void Button_Secondary_palette(void);
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/// Choose the number of graduations for RGB components, from 2 to 256.
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void Set_palette_RGB_scale(int);
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int Get_palette_RGB_scale(void);
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/// Configure Gamma correction
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void Set_palette_Gamma(int);
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///
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/// Scale a component (R, G or B) according to the current RGB graduations.
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/// Returns the resulting value, in the [0-255] range.
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byte Round_palette_component(byte comp);
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/*!
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Adds 4 menu colors in the current palette.
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@param color_usage An up-to-date color usage table (byte[256]) (read only)
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@param not_picture 0 if the caller is the palette screen, 1 if it's a preview in the file selector.
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*/
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void Set_nice_menu_colors(dword * color_usage,int not_picture);
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/// Put some colors in the clipboard.
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/// @param nb_colors Number of colors to push
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/// @param colors First color of the input array
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void Set_clipboard_colors(int nb_colors, T_Components *colors);
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/// Get some RGB colors from clipboard.
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/// @param palette Target palette
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/// @param start_color Index of first color to replace
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/// @return Number of colors retrieved (0-256)
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int Get_clipboard_colors(T_Palette palette, byte start_color);
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/// Get the favorite color to use for GUI's black,dark,light or white.
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const T_Components * Favorite_GUI_color(byte color_index);
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