From 1aa4f36c80ff11faf5562474f65cf466e480b210 Mon Sep 17 00:00:00 2001 From: Wade Brainerd Date: Tue, 01 Apr 2008 12:22:16 +0000 Subject: Initial commit of Colors! v3. --- (limited to 'src/colorsc.h') diff --git a/src/colorsc.h b/src/colorsc.h new file mode 100644 index 0000000..555ec2c --- /dev/null +++ b/src/colorsc.h @@ -0,0 +1,204 @@ +/* + Copyright 2008 by Jens Andersson and Wade Brainerd. + This file is part of Colors! XO. + + Colors is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Colors is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Colors. If not, see . +*/ +#ifndef _COLORSC_H_ +#define _COLORSC_H_ + +#include + +#include +#include +using namespace std; + +#include + +// todo- Include the real GTK headers when installed. +#include "gtk_types.h" + +static const float PI = 3.14159f; + +inline float sgn(float a) { if (a>0) return 1; if (a<0) return -1; return 0; } + +inline float sqr(float a) { return a*a; } + +inline float clamp(float a, float mn, float mx) { return max(mn, min(mx, a)); } + +inline float to_rad(float degrees) { return degrees * PI/180.0f; } +inline float to_deg(float rads) { return rads * 180.0f/PI; } + +// Maps an incoming value in a given f0-t0 range to a new value in the f1-t1 range, optionally clamping to f1-t1. +inline float map_range(float a, float f0, float t0, float f1, float t1, bool clmp=true) +{ + float r = (a-f0)/(t0-f0); + if (clmp) r = clamp(r, 0.0f, 1.0f); + return f1+r*(t1-f1); +} + +// Scales a value by an 8bit scale factor from 0-255. The MSB of the scale factor is added to it, which means that +// scaling by 255 is an identity. +inline int fixed_scale(int value, int scale) +{ + scale += scale >> 7; + return (value * scale) >> 8; +} + +inline unsigned short endian_swap(unsigned short v) +{ + return (v>>8) | (v<<8); +} + +struct Pos +{ + float x, y; + Pos() : x(0), y(0) {} + Pos(float x, float y) : x(x), y(y) {} + Pos operator+(const Pos& b) const { return Pos(x+b.x, y+b.y); } + Pos operator-(const Pos& b) const { return Pos(x-b.x, y-b.y); } + Pos operator*(const Pos& b) const { return Pos(x*b.x, y*b.y); } + Pos operator/(const Pos& b) const { return Pos(x/b.x, y/b.y); } + Pos operator*(float b) const { return Pos(x*b, y*b); } + Pos operator/(float b) const { return Pos(x/b, y/b); } + static Pos create_from_min(const Pos& a, const Pos& b) { return Pos(min(a.x,b.x), min(a.y,b.y)); } + static Pos create_from_max(const Pos& a, const Pos& b) { return Pos(max(a.x,b.x), max(a.y,b.y)); } + static Pos create_from_angle(float a, float r) { return Pos(cosf(a*PI/180.0f)*r, sinf(a*PI/180.0f)*r); } + static Pos create_from_rotation(const Pos& a, const Pos& center, float t) + { + return Pos( + (a.x-center.x)*cosf(t) - (a.y-center.y)*sinf(t) + center.x, + (a.y-center.y)*cosf(t) + (a.x-center.x)*sinf(t) + center.y); + } +}; + +struct Color +{ + unsigned char r, g, b, a; + Color() : r(0), g(0), b(0), a(0) {} + Color(int r, int g, int b, int a) : r(r), g(g), b(b), a(a) {} + unsigned int get_a8r8g8b8() { return (a<<24) | (r<<16) | (g<<8) | (b<<0); } + static Color create_from_a8r8g8b8(unsigned int v) + { + Color c; + c.a = (v>>24) & 0xff; + c.r = (v>>16) & 0xff; + c.g = (v>> 8) & 0xff; + c.b = (v>> 0) & 0xff; + return c; + } + unsigned int get_a8b8g8r8() { return (a<<24) | (b<<16) | (g<<8) | (r<<0); } + static Color create_from_a8b8g8r8(unsigned int v) + { + Color c; + c.a = (v>>24) & 0xff; + c.b = (v>>16) & 0xff; + c.g = (v>> 8) & 0xff; + c.r = (v>> 0) & 0xff; + return c; + } + unsigned int get_r5g6b5() { return ((r>>3)<<11) | ((g>>2)<<5) | (b>>3); } + static Color create_from_r5g6b5(unsigned short v) + { + Color c; + c.r = ((v>>11)&0x1f)<<3; + c.g = ((v>> 5)&0x1f)<<3; + c.b = ((v>> 0)&0x1f)<<3; + c.a = 255; + return c; + } + unsigned int get_b5g6r5() { return ((b>>3)<<11) | ((g>>2)<<5) | (r>>3); } + static Color create_from_float(float r, float g, float b, float a) + { + Color c; + c.r = int(r*255.0f); + c.g = int(g*255.0f); + c.b = int(b*255.0f); + c.a = int(a*255.0f); + return c; + } + static Color create_from_blend(const Color& a, const Color& b) + { + return create_from_lerp(a, b, a.a); + } + static Color create_from_lerp(const Color& a, const Color& b, unsigned int l) + { + unsigned int il = 255-l; + l += l >> 7; + il += il >> 7; + Color c; + c.r = ((a.r * l) + (b.r * il)) >> 8; + c.g = ((a.g * l) + (b.g * il)) >> 8; + c.b = ((a.b * l) + (b.b * il)) >> 8; + c.a = ((a.a * l) + (b.a * il)) >> 8; + return c; + } + static Color create_from_yuv(unsigned char y, unsigned char u, unsigned char v) + { + Color c; + c.r = (unsigned char)max(0.0f, min(255.0f, 1.164f*(y-16) + 1.596f*(v-128))); + c.g = (unsigned char)max(0.0f, min(255.0f, 1.164f*(y-16) - 0.813f*(v-128) - 0.391f*(u-128))); + c.b = (unsigned char)max(0.0f, min(255.0f, 1.164f*(y-16) + 2.018f*(u-128))); + return c; + } + + static Color yuv_to_hsv(unsigned int yuv) + { + Color c, d; + unsigned char y,u,v,val,delta,vmin; + float hue, sat; + // v4l2src is sending YUYV, meaning, 4 bytes per 2 pixels. + // pixel 1 gets the first 8 bit y and both 8 bit U and V. + // pixel 2 gets the other y and u and v. we are only using pixel 1. + y = ((yuv>>24)&0xFF); + u = ((yuv>>16)&0xFF); + v = (yuv&0xFF); + // for now, yuv->first. TODO: go straight from yuv to hsv + d = create_from_yuv(y, u, v); + + val = max(max(d.r, d.g), d.b); + vmin = min(min(d.r, d.g), d.b); + delta = val-vmin; + if (delta == 0) { + hue = 0.0; + sat = 0.0; + } else if (val == d.r) { + hue = 42.5*(d.g-d.b)/delta; + sat = 255.0*delta/val; + } else if (val == d.g) { + hue = 42.5*(d.b-d.r)/delta + 85.0; + sat = 255.0*delta/val; + } else { + hue = 42.5*(d.r-d.g)/delta + 170.0; + sat = 255.0*delta/val; + } + if (hue < 0.0) hue += 255.0; + if (hue > 255.0) hue -= 255.0; + c.r = (unsigned char)max(0.0f, min(255.0f, hue)); + c.g = (unsigned char)max(0.0f, min(255.0f, sat)); + c.b = (unsigned char)max((unsigned char)0, min((unsigned char)255, val)); + return c; + } + +}; + +// Structure for passing byte data to and from Python. +struct ByteBuffer +{ + int size; + void* data; +}; + +#endif + -- cgit v0.9.1