b0bc48fbd3
* Mesa doesn't compile yet, as some PPC specific stuff seems to be missing, Philippe? * Cortex and some other stuff has been marked x86-only, although it's more of a "GCC 2.95.3"-only. * I'm not sure if it's a bug in GCC 4, or if that's what the C standard demands, but sizeof(some_type::some_field) is not valid anymore :-/ git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17515 a95241bf-73f2-0310-859d-f6bbb57e9c96
487 lines
8.7 KiB
C++
487 lines
8.7 KiB
C++
/*
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* Copyright 2001-2006, Haiku.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* DarkWyrm <bpmagic@columbus.rr.com>
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*/
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#include "RGBColor.h"
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#include "SystemPalette.h"
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#include <stdio.h>
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#include <stdlib.h>
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/*!
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\brief An approximation of 31/255, which is needed for converting from 32-bit
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colors to 16-bit and 15-bit.
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*/
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#define RATIO_8_TO_5_BIT .121568627451
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/*!
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\brief An approximation of 63/255, which is needed for converting from 32-bit
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colors to 16-bit.
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*/
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#define RATIO_8_TO_6_BIT .247058823529
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/*!
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\brief An approximation of 255/31, which is needed for converting from 16-bit
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and 15-bit colors to 32-bit.
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*/
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#define RATIO_5_TO_8_BIT 8.22580645161
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/*!
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\brief An approximation of 255/63, which is needed for converting from 16-bit
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colors to 32-bit.
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*/
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#define RATIO_6_TO_8_BIT 4.04761904762
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#if 0
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/*!
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\brief Function for easy conversion of 16-bit colors to 32-bit
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\param col Pointer to an rgb_color.
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\param color RGB16 color
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This function will do nothing if passed a NULL 32-bit color.
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*/
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void
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SetRGBColor16(rgb_color *col,uint16 color)
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{
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if(!col)
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return;
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uint16 r16,g16,b16;
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// alpha's the easy part
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col->alpha=0;
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r16= (color >> 11) & 31;
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g16= (color >> 5) & 63;
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b16= color & 31;
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col->red=uint8(r16 * RATIO_5_TO_8_BIT);
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col->green=uint8(g16 * RATIO_6_TO_8_BIT);
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col->blue=uint8(b16 * RATIO_5_TO_8_BIT);
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}
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#endif
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/*!
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\brief Finds the index of the closest matching color in a rgb_color palette array
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\param palette Array of 256 rgb_color objects
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\param color Color to match
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\return Index of the closest matching color
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Note that passing a NULL palette will always return 0 and passing an array of less
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than 256 rgb_colors will cause a crash.
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*/
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static uint8
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FindClosestColor(const rgb_color *palette, rgb_color color)
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{
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if (!palette)
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return 0;
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uint16 cindex = 0, cdelta = 765, delta = 765;
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for (uint16 i = 0; i < 256; i++) {
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const rgb_color *c = &(palette[i]);
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delta = abs(c->red-color.red) + abs(c->green-color.green)
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+ abs(c->blue-color.blue);
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if (delta == 0) {
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cindex = i;
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break;
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}
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if (delta < cdelta) {
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cindex = i;
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cdelta = delta;
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}
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}
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return (uint8)cindex;
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}
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/*!
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\brief Constructs a RGBA15 color which best matches a given 32-bit color
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\param color Color to match
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\return The closest matching color's value
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Format is ARGB, 1:5:5:5
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*/
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static uint16
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FindClosestColor15(rgb_color color)
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{
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uint16 r16 = uint16(color.red * RATIO_8_TO_5_BIT);
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uint16 g16 = uint16(color.green * RATIO_8_TO_5_BIT);
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uint16 b16 = uint16(color.blue * RATIO_8_TO_5_BIT);
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// start with alpha value
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uint16 color16 = color.alpha > 127 ? 0x8000 : 0;
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color16 |= r16 << 10;
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color16 |= g16 << 5;
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color16 |= b16;
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return color16;
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}
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/*!
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\brief Constructs a RGB16 color which best matches a given 32-bit color
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\param color Color to match
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\return The closest matching color's value
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Format is RGB, 5:6:5
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*/
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static uint16
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FindClosestColor16(rgb_color color)
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{
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uint16 r16 = uint16(color.red * RATIO_8_TO_5_BIT);
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uint16 g16 = uint16(color.green * RATIO_8_TO_6_BIT);
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uint16 b16 = uint16(color.blue * RATIO_8_TO_5_BIT);
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uint16 color16 = r16 << 11;
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color16 |= g16 << 5;
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color16 |= b16;
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return color16;
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}
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// #pragma mark -
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/*!
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\brief Create an RGBColor from specified values
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\param red red
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\param green green
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\param blue blue
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\param alpha alpha, defaults to 255
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*/
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RGBColor::RGBColor(uint8 r, uint8 g, uint8 b, uint8 a)
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{
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SetColor(r,g,b,a);
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}
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/*!
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\brief Create an RGBColor from specified values
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\param red red
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\param green green
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\param blue blue
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\param alpha alpha, defaults to 255
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*/
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RGBColor::RGBColor(int r, int g, int b, int a)
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{
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SetColor(r, g, b, a);
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}
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/*!
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\brief Create an RGBColor from an rgb_color
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\param color color to initialize from
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*/
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RGBColor::RGBColor(const rgb_color &color)
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{
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SetColor(color);
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}
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#if 0
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/*!
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\brief Create an RGBColor from a 16-bit RGBA color
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\param color color to initialize from
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*/
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RGBColor::RGBColor(uint16 color)
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{
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SetColor(color);
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}
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#endif
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/*!
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\brief Create an RGBColor from an index color
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\param color color to initialize from
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*/
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RGBColor::RGBColor(uint8 color)
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{
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SetColor(color);
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}
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/*!
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\brief Copy Contructor
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\param color color to initialize from
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*/
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RGBColor::RGBColor(const RGBColor &color)
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{
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fColor32 = color.fColor32;
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fColor16 = color.fColor16;
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fColor8 = color.fColor8;
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fUpdate8 = color.fUpdate8;
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fUpdate16 = color.fUpdate16;
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}
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/*!
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\brief Create an RGBColor with the values(0,0,0,0)
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*/
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RGBColor::RGBColor()
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{
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SetColor(0, 0, 0, 0);
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}
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/*!
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\brief Returns the color as the closest 8-bit color in the palette
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\return The palette index for the current color
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*/
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uint8
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RGBColor::GetColor8() const
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{
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if (fUpdate8) {
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fColor8 = FindClosestColor(SystemPalette(), fColor32);
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fUpdate8 = false;
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}
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return fColor8;
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}
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/*!
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\brief Returns the color as the closest 15-bit color
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\return 15-bit value of the current color plus 1-bit alpha
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*/
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uint16
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RGBColor::GetColor15() const
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{
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if (fUpdate15) {
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fColor15 = FindClosestColor15(fColor32);
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fUpdate15 = false;
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}
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return fColor15;
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}
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/*!
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\brief Returns the color as the closest 16-bit color
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\return 16-bit value of the current color
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*/
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uint16
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RGBColor::GetColor16() const
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{
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if (fUpdate16) {
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fColor16 = FindClosestColor16(fColor32);
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fUpdate16 = false;
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}
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return fColor16;
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}
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/*!
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\brief Returns the color as a 32-bit color
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\return current color, including alpha
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*/
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rgb_color
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RGBColor::GetColor32() const
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{
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return fColor32;
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}
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/*!
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\brief Set the object to specified values
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\param red red
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\param green green
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\param blue blue
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\param alpha alpha, defaults to 255
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*/
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void
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RGBColor::SetColor(uint8 r, uint8 g, uint8 b, uint8 a)
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{
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fColor32.red = r;
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fColor32.green = g;
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fColor32.blue = b;
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fColor32.alpha = a;
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fUpdate8 = fUpdate16 = true;
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}
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/*!
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\brief Set the object to specified values
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\param red red
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\param green green
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\param blue blue
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\param alpha alpha, defaults to 255
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*/
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void
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RGBColor::SetColor(int r, int g, int b, int a)
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{
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fColor32.red = (uint8)r;
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fColor32.green = (uint8)g;
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fColor32.blue = (uint8)b;
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fColor32.alpha = (uint8)a;
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fUpdate8 = fUpdate16 = true;
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}
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#if 0
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/*!
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\brief Set the object to specified value
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\param col16 color to copy
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*/
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void
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RGBColor::SetColor(uint16 col16)
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{
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fColor16 = col16;
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SetRGBColor(&fColor32,col16);
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fUpdate8 = true;
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fUpdate16 = false;
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}
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#endif
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/*!
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\brief Set the object to specified index in the palette
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\param col8 color to copy
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*/
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void
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RGBColor::SetColor(uint8 col8)
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{
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fColor8 = col8;
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fColor32 = SystemPalette()[col8];
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fUpdate8 = false;
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fUpdate16 = true;
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}
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/*!
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\brief Set the object to specified color
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\param color color to copy
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*/
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void
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RGBColor::SetColor(const rgb_color &color)
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{
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fColor32 = color;
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fUpdate8 = fUpdate16 = true;
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}
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/*!
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\brief Set the object to specified color
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\param color color to copy
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*/
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void
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RGBColor::SetColor(const RGBColor &color)
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{
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fColor32 = color.fColor32;
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fColor16 = color.fColor16;
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fColor8 = color.fColor8;
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fUpdate8 = color.fUpdate8;
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fUpdate16 = color.fUpdate16;
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}
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/*!
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\brief Set the object to specified color
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\param color color to copy
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*/
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const RGBColor&
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RGBColor::operator=(const RGBColor &color)
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{
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fColor32 = color.fColor32;
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fColor16 = color.fColor16;
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fColor8 = color.fColor8;
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fUpdate8 = color.fUpdate8;
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fUpdate16 = color.fUpdate16;
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return *this;
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}
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/*!
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\brief Set the object to specified color
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\param color color to copy
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*/
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const RGBColor&
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RGBColor::operator=(const rgb_color &color)
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{
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fColor32 = color;
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fUpdate8 = fUpdate16 = true;
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return *this;
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}
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/*!
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\brief Prints the 32-bit values of the color to standard out
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*/
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void
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RGBColor::PrintToStream(void) const
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{
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printf("RGBColor(%u,%u,%u,%u)\n",
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fColor32.red, fColor32.green, fColor32.blue, fColor32.alpha);
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}
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/*!
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\brief Overloaded comaparison
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\return true if all color elements are exactly equal
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*/
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bool
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RGBColor::operator==(const rgb_color &color) const
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{
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return fColor32.red == color.red
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&& fColor32.green == color.green
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&& fColor32.blue == color.blue
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&& fColor32.alpha == color.alpha;
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}
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/*!
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\brief Overloaded comaparison
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\return true if all color elements are exactly equal
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*/
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bool
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RGBColor::operator==(const RGBColor &color) const
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{
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return fColor32.red == color.fColor32.red
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&& fColor32.green == color.fColor32.green
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&& fColor32.blue == color.fColor32.blue
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&& fColor32.alpha == color.fColor32.alpha;
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}
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bool
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RGBColor::operator!=(const rgb_color &color) const
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{
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return fColor32.red != color.red
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|| fColor32.green != color.green
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|| fColor32.blue != color.blue
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|| fColor32.alpha != color.alpha;
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}
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bool
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RGBColor::operator!=(const RGBColor &color) const
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{
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return fColor32.red != color.fColor32.red
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|| fColor32.green != color.fColor32.green
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|| fColor32.blue != color.fColor32.blue
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|| fColor32.alpha != color.fColor32.alpha;
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}
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bool
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RGBColor::IsTransparentMagic() const
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{
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// TODO: validate this for B_CMAP8 for example
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return *this == B_TRANSPARENT_COLOR;
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}
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