sdl-ios-xcode: src/video/Xext/XmuStdCmap/Distinct.c annotate

annotate src/video/Xext/XmuStdCmap/Distinct.c @ 3473:7bdc10624cba

This is terrible, but the OpenGL standard says that lines are half open, which means that one endpoint is not covered so adjoining lines don't overlap. It also doesn't define which end is open, and indeed Mac OS X and Linux differ. Mac OS X seems to leave the second endpoint open, but Linux uses the right-most endpoint for x major lines and the bottom-most endpoint for y major lines.

author	Sam Lantinga <slouken@libsdl.org>
date	Sat, 21 Nov 2009 07:14:21 +0000
parents	2032348afed1
children

rev	line source
2185 2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	1 /* $Xorg: Distinct.c,v 1.4 2001/02/09 02:03:52 xorgcvs Exp $ */
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	2
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	3 /*
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	4
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	5 Copyright 1990, 1998 The Open Group
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	6
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	7 Permission to use, copy, modify, distribute, and sell this software and its
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	8 documentation for any purpose is hereby granted without fee, provided that
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	9 the above copyright notice appear in all copies and that both that
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	10 copyright notice and this permission notice appear in supporting
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	11 documentation.
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	12
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	13 The above copyright notice and this permission notice shall be included in
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	14 all copies or substantial portions of the Software.
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	15
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	19 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	20 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	21 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	22
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	23 Except as contained in this notice, the name of The Open Group shall not be
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	24 used in advertising or otherwise to promote the sale, use or other dealings
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	25 in this Software without prior written authorization from The Open Group.
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	26
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	27 */
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	28 /* $XFree86: xc/lib/Xmu/Distinct.c,v 3.5 2001/07/25 15:04:50 dawes Exp $ */
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	29
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	30 /*
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	31 * Author: Keith Packard, MIT X Consortium
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	32 */
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	33
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	34 #ifdef HAVE_CONFIG_H
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	35 #include <config.h>
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	36 #endif
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	37 #include <X11/Xlib.h>
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	38 #include <stdlib.h>
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	39 #include <X11/Xutil.h>
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	40 #include "../extensions/StdCmap.h"
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	41
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	42 /*
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	43 * Distinguishable colors routine. Determines if two colors are
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	44 * distinguishable or not. Somewhat arbitrary meaning.
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	45 */
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	46
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	47 #define MIN_DISTINGUISH 10000.0
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	48
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	49 Bool
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	50 XmuDistinguishableColors(XColor * colors, int count)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	51 {
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	52 double deltaRed, deltaGreen, deltaBlue;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	53 double dist;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	54 int i, j;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	55
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	56 for (i = 0; i < count - 1; i++)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	57 for (j = i + 1; j < count; j++) {
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	58 deltaRed = (double) colors[i].red - (double) colors[j].red;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	59 deltaGreen = (double) colors[i].green - (double) colors[j].green;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	60 deltaBlue = (double) colors[i].blue - (double) colors[j].blue;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	61 dist = deltaRed * deltaRed +
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	62 deltaGreen * deltaGreen + deltaBlue * deltaBlue;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	63 if (dist <= MIN_DISTINGUISH * MIN_DISTINGUISH)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	64 return False;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	65 }
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	66 return True;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	67 }
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	68
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	69 Bool
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	70 XmuDistinguishablePixels(Display * dpy, Colormap cmap,
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	71 unsigned long *pixels, int count)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	72 {
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	73 XColor *defs;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	74 int i, j;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	75 Bool ret;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	76
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	77 for (i = 0; i < count - 1; i++)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	78 for (j = i + 1; j < count; j++)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	79 if (pixels[i] == pixels[j])
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	80 return False;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	81 defs = (XColor ) malloc(count sizeof(XColor));
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	82 if (!defs)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	83 return False;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	84 for (i = 0; i < count; i++)
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	85 defs[i].pixel = pixels[i];
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	86 XQueryColors(dpy, cmap, defs, count);
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	87 ret = XmuDistinguishableColors(defs, count);
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	88 free((char *) defs);
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	89 return ret;
2032348afed1 This code adds support for DirectColor visuals to SDL 1.3. The support uses part of the Xmu library. To ensure that the library is Bob Pendleton <bob@pendleton.com> parents: diff changeset	90 }

Mercurial > sdl-ios-xcode

annotate src/video/Xext/XmuStdCmap/Distinct.c @ 3473:7bdc10624cba