/* This is -*- C -*- */ /* $Id: guppi-rgb.h,v 1.15 2002/01/20 05:21:09 trow Exp $ */ /* * guppi-rgb.h * * Copyright (C) 1999, 2000 EMC Capital Management, Inc. * * Developed by Jon Trowbridge and * Havoc Pennington . * * This program 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 2 of the * License, or (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #ifndef _INC_RGB_H #define _INC_RGB_H /* #include */ #include #include #include #include "guppi-defs.h" BEGIN_GUPPI_DECLS /* Some convenient macros for drawing into an RGB buffer. Beware of side effects, code-bloat, and all of the other classic cpp-perils... */ #define RGB_TO_UINT(r,g,b) ((((guint)(r))<<16)|(((guint)(g))<<8)|((guint)(b))) #define RGB_TO_RGBA(x,a) (((x) << 8) | ((((guint)a) & 0xff))) #define RGBA_TO_UINT(r,g,b,a) RGB_TO_RGBA(RGB_TO_UINT(r,g,b), a) #define RGB_WHITE RGB_TO_UINT(0xff, 0xff, 0xff) #define RGB_BLACK RGB_TO_UINT(0x00, 0x00, 0x00) #define RGB_RED RGB_TO_UINT(0xff, 0x00, 0x00) #define RGB_GREEN RGB_TO_UINT(0x00, 0xff, 0x00) #define RGB_BLUE RGB_TO_UINT(0x00, 0x00, 0xff) #define RGB_YELLOW RGB_TO_UINT(0xff, 0xff, 0x00) #define RGB_VIOLET RGB_TO_UINT(0xff, 0x00, 0xff) #define RGB_CYAN RGB_TO_UINT(0x00, 0xff, 0xff) #define RGBA_WHITE RGB_TO_RGBA(RGB_WHITE, 0xff) #define RGBA_BLACK RGB_TO_RGBA(RGB_BLACK, 0xff) #define RGBA_RED RGB_TO_RGBA(RGB_RED, 0xff) #define RGBA_GREEN RGB_TO_RGBA(RGB_GREEN, 0xff) #define RGBA_BLUE RGB_TO_RGBA(RGB_BLUE, 0xff) #define RGBA_YELLOW RGB_TO_RGBA(RGB_YELLOW, 0xff) #define RGBA_VIOLET RGB_TO_RGBA(RGB_VIOLET, 0xff) #define RGBA_CYAN RGB_TO_RGBA(RGB_CYAN, 0xff) #define RGB_GREY(x) RGB_TO_UINT(x,x,x) #define RGBA_GREY(x) RGB_TO_RGBA(RGB_GREY(x), 0xff) #define UINT_RGBA_R(x) (((guint)(x))>>24) #define UINT_RGBA_G(x) ((((guint)(x))>>16)&0xff) #define UINT_RGBA_B(x) ((((guint)(x))>>8)&0xff) #define UINT_RGBA_A(x) (((guint)(x))&0xff) #define UINT_RGBA_CHANGE_R(x, r) (((x)&(~(0xff<<24)))|(((r)&0xff)<<24)) #define UINT_RGBA_CHANGE_G(x, g) (((x)&(~(0xff<<16)))|(((g)&0xff)<<16)) #define UINT_RGBA_CHANGE_B(x, b) (((x)&(~(0xff<<8)))|(((b)&0xff)<<8)) #define UINT_RGBA_CHANGE_A(x, a) (((x)&(~0xff))|((a)&0xff)) #define UINT_TO_RGB(u,r,g,b) \ { (*(r)) = ((u)>>16)&0xff; (*(g)) = ((u)>>8)&0xff; (*(b)) = (u)&0xff; } #define UINT_TO_RGBA(u,r,g,b,a) \ { UINT_TO_RGB(((u)>>8),r,g,b); (*(a)) = (u)&0xff; } #define MONO_INTERPOLATE(v1, v2, t) ((gint)rint((v2)*(t)+(v1)*(1-(t)))) #define UINT_INTERPOLATE(c1, c2, t) \ RGBA_TO_UINT( MONO_INTERPOLATE(UINT_RGBA_R(c1), UINT_RGBA_R(c2), t), \ MONO_INTERPOLATE(UINT_RGBA_G(c1), UINT_RGBA_G(c2), t), \ MONO_INTERPOLATE(UINT_RGBA_B(c1), UINT_RGBA_B(c2), t), \ MONO_INTERPOLATE(UINT_RGBA_A(c1), UINT_RGBA_A(c2), t) ) #define PIXEL_RGB(p, r, g, b) \ {((guchar*)(p))[0]=(r); ((guchar*)(p))[1]=(g); ((guchar*)(p))[2]=(b);} #define PIXEL_RGBA(p, r, g, b, a) \ { if ((a)>=0xff) { PIXEL_RGB(p,r,g,b) } \ else if ((a)>0) { \ guint pixel_tmp; \ pixel_tmp = ((guchar*)(p))[0]; \ ((guchar*)(p))[0] = pixel_tmp + ((((r)-pixel_tmp)*(a)+0x80) >> 8); \ pixel_tmp = ((guchar*)(p))[1]; \ ((guchar*)(p))[1] = pixel_tmp + ((((g)-pixel_tmp)*(a)+0x80) >> 8); \ pixel_tmp = ((guchar*)(p))[2]; \ ((guchar*)(p))[2] = pixel_tmp + ((((b)-pixel_tmp)*(a)+0x80) >> 8); }} #define PIXEL_RGB_UINT(p, i) \ UINT_TO_RGB((i), ((guchar*)p), ((guchar*)p)+1, ((guchar*)p)+2) #define PIXEL_RGBA_UINT(p, i) \ PIXEL_RGBA((p), ((i)>>24)&0xff, ((i)>>16)&0xff, ((i)>>8)&0xff, (i)&0xff) #define PIXEL_BLACK(p) PIXEL_RGB(p,0,0,0) #define PIXEL_WHITE(p) PIXEL_RGB(p,0xff,0xff,0xff) #define PIXEL_GREY(p,g) PIXEL_RGB(p,g,g,g) #define PIXEL_GREYA(p,g,a) PIXEL_RGBA(p,g,g,g,a) #define BUF_PTR(inbuf, ptx, pty) \ ((inbuf)->buf + 3*((ptx)-(inbuf)->rect.x0) + (inbuf)->buf_rowstride*((pty)-(inbuf)->rect.y0)) #define BUF_INBOUNDS_X(inbuf, ptx) \ ((inbuf)->rect.x0 <= (ptx) && (ptx) < (inbuf)->rect.x1) #define BUF_INBOUNDS_Y(inbuf, pty) \ ((inbuf)->rect.y0 <= (pty) && (pty) < (inbuf)->rect.y1) #define PAINT_DOT(inbuf, colr, colg, colb, cola, ptx, pty) \ { \ guchar* pd_p; \ if (BUF_INBOUNDS_X(inbuf, ptx) && BUF_INBOUNDS_Y(inbuf, pty)) { \ pd_p = BUF_PTR(inbuf, ptx, pty); \ PIXEL_RGBA(pd_p, (colr), (colg), (colb), (cola)); \ } \ } #define PAINT_HORIZ(inbuf, colr, colg, colb, cola, ptx0, ptx1, pty) \ { \ GnomeCanvasBuf* ph_buf = (inbuf); \ guchar* ph_p; \ gint ph_a0, ph_a1; \ gint ph_colr=(colr), ph_colg=(colg), ph_colb=(colb), ph_cola=(cola); \ \ ph_a0 = MAX(ph_buf->rect.x0, (ptx0)); \ ph_a1 = MIN(ph_buf->rect.x1, (ptx1)); \ \ if (ph_a0 < ph_a1 && BUF_INBOUNDS_Y(ph_buf, pty)) { \ ph_p = BUF_PTR(ph_buf, ph_a0, pty); \ while (ph_a0 < ph_a1) { \ PIXEL_RGBA(ph_p, ph_colr, ph_colg, ph_colb, ph_cola); \ ++ph_a0; \ ph_p += 3; \ } \ } \ } #define PAINT_VERT(inbuf, colr, colg, colb, cola, ptx, pty0, pty1) \ { \ GnomeCanvasBuf* pv_buf = (inbuf); \ guchar* pv_p; \ gint pv_b0, pv_b1; \ gint pv_colr=(colr), pv_colg=(colg), pv_colb=(colb), pv_cola=(cola);\ \ pv_b0 = MAX(pv_buf->rect.y0, (pty0)); \ pv_b1 = MIN(pv_buf->rect.y1, (pty1)); \ \ if (pv_b0 < pv_b1 && BUF_INBOUNDS_X(pv_buf, ptx)) { \ pv_p = BUF_PTR(pv_buf, ptx, pv_b0); \ while (pv_b0 < pv_b1) { \ PIXEL_RGBA(pv_p, pv_colr, pv_colg, pv_colb, pv_cola); \ ++pv_b0; \ pv_p += pv_buf->buf_rowstride; \ } \ } \ } /* Paint a solid-colored box into a GnomeCanvasBuf (clipping as necessary). The box contains (ptx0,pty0), but not (ptx1, pty1). Each macro arg should appear exactly once in the body of the code. */ #define PAINT_BOX(inbuf, colr, colg, colb, cola, ptx0, pty0, ptx1, pty1) \ { \ GnomeCanvasBuf* pb_buf = (inbuf); \ guchar* pb_p; \ guchar* pb_pp; \ gint pb_a0, pb_a1, pb_b0, pb_b1, pb_i, pb_j; \ gint pb_colr=(colr), pb_colg=(colg), pb_colb=(colb), pb_cola=(cola); \ \ pb_a0 = MAX(pb_buf->rect.x0, (ptx0)); \ pb_a1 = MIN(pb_buf->rect.x1, (ptx1)); \ pb_b0 = MAX(pb_buf->rect.y0, (pty0)); \ pb_b1 = MIN(pb_buf->rect.y1, (pty1)); \ \ if (pb_a0 < pb_a1 && pb_b0 < pb_b1) { \ pb_p = BUF_PTR(pb_buf, pb_a0, pb_b0); \ for (pb_j=pb_b0; pb_jbuf_rowstride; \ } \ } \ } guint32 guppi_str2color_rgba (const gchar *color_name); void guppi_paint_horiz (GnomeCanvasBuf *, gint x0, gint x1, gint y, guint32 c); void guppi_paint_vert (GnomeCanvasBuf *, gint x, gint y0, gint y1, guint32 c); void guppi_paint_box (GnomeCanvasBuf *, gint x0, gint y0, gint x1, gint y1, guint32 color); void guppi_paint_soft_box (GnomeCanvasBuf *, double x0, double y0, double x1, double y1, guint32 color); void guppi_paint_sharp_box (GnomeCanvasBuf *, double x0, double y0, double x1, double y1, guint32 color); void guppi_paint_wide_line (GnomeCanvasBuf *, double x0, double y0, double x1, double y1, double width, guint32 color); void guppi_paint_wide_line_alt (GnomeCanvasBuf *, double x0, double y0, double x1, double y1, double width, guint32 color0, guint32 color1); void guppi_paint_wide_curve (GnomeCanvasBuf *buf, ArtVpath *path, double width, guint32 color); END_GUPPI_DECLS #endif /* _INC_RGB_H */ /* $Id: guppi-rgb.h,v 1.15 2002/01/20 05:21:09 trow Exp $ */