2: /*
3: Code for managing color the X implementation of the PetscDraw routines.
5: Currently we default to using cmapping[0 to PETSC_DRAW_BASIC_COLORS-1] for the basic colors and
6: cmapping[DRAW_BASIC_COLORS to 255] for countour plots.
8: */
9: #include <../src/sys/classes/draw/impls/x/ximpl.h> 10: #include <X11/Xatom.h>
12: static const char *colornames[PETSC_DRAW_BASIC_COLORS] = {
13: "white",
14: "black",
15: "red",
16: "green",
17: "cyan",
18: "blue",
19: "magenta",
20: "aquamarine",
21: "forestgreen",
22: "orange",
23: "violet",
24: "brown",
25: "pink",
26: "coral",
27: "gray",
28: "yellow",
29: "gold",
30: "lightpink",
31: "mediumturquoise",
32: "khaki",
33: "dimgray",
34: "yellowgreen",
35: "skyblue",
36: "darkgreen",
37: "navyblue",
38: "sandybrown",
39: "cadetblue",
40: "powderblue",
41: "deeppink",
42: "thistle",
43: "limegreen",
44: "lavenderblush",
45: "plum"
46: };
48: /*
49: Sets up a color map for a display. This is shared by all the windows
50: opened on that display; this is to save time when windows are open so
51: each one does not have to create its own color map which can take 15 to 20 seconds
53: This is new code written 2/26/1999 Barry Smith,I hope it can replace
54: some older,rather confusing code.
56: The calls to XAllocNamedColor() and XAllocColor() are very slow
57: because we have to request from the X server for each
58: color. Could not figure out a way to request a large number at the
59: same time.
61: IMPORTANT: this code will fail if user opens windows on two different
62: displays: should add error checking to detect this. This is because all windows
63: share the same gColormap and gCmapping.
65: */
66: static Colormap gColormap = 0;
67: static PetscDrawXiPixVal gCmapping[PETSC_DRAW_MAXCOLOR];
68: static unsigned char gCpalette[PETSC_DRAW_MAXCOLOR][3];
70: PetscErrorCode PetscDrawSetUpColormap_Shared(Display *display,int screen,Visual *visual,Colormap colormap) 71: {
72: int i,k,ncolors = PETSC_DRAW_MAXCOLOR - PETSC_DRAW_BASIC_COLORS;
73: unsigned char R[PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS];
74: unsigned char G[PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS];
75: unsigned char B[PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS];
76: XColor colordef,ecolordef;
77: PetscBool fast = PETSC_FALSE;
81: if (colormap) gColormap = colormap;
82: else gColormap = DefaultColormap(display,screen);
85: /* set the basic colors into the color map */
86: for (i=0; i<PETSC_DRAW_BASIC_COLORS; i++) {
87: XAllocNamedColor(display,gColormap,colornames[i],&colordef,&ecolordef);
88: gCmapping[i] = colordef.pixel;
89: gCpalette[i][0] = (unsigned char)(colordef.red >> 8);
90: gCpalette[i][1] = (unsigned char)(colordef.green >> 8);
91: gCpalette[i][2] = (unsigned char)(colordef.blue >> 8);
92: }
94: /* set the contour colors into the colormap */
95: PetscOptionsGetBool(NULL,NULL,"-draw_fast",&fast,NULL);
96: PetscDrawUtilitySetCmap(NULL,ncolors,R,G,B);
97: for (i=0, k=PETSC_DRAW_BASIC_COLORS; i<ncolors; i++, k++) {
98: colordef.red = (unsigned short)(R[i] << 8);
99: colordef.green = (unsigned short)(G[i] << 8);
100: colordef.blue = (unsigned short)(B[i] << 8);
101: colordef.flags = DoRed|DoGreen|DoBlue;
102: colordef.pixel = gCmapping[PETSC_DRAW_BLACK];
103: if (!fast) XAllocColor(display,gColormap,&colordef);
104: gCmapping[k] = colordef.pixel;
105: gCpalette[k][0] = R[i];
106: gCpalette[k][1] = G[i];
107: gCpalette[k][2] = B[i];
108: }
110: PetscInfo(0,"Successfully allocated colors\n");
111: return(0);
112: }
114: /*
115: Keep a record of which pixel numbers in the cmap have been
116: used so far; this is to allow us to try to reuse as much of the current
117: colormap as possible.
118: */
119: static PetscBool cmap_pixvalues_used[PETSC_DRAW_MAXCOLOR];
120: static int cmap_base = 0;
122: PetscErrorCode PetscDrawSetUpColormap_Private(Display *display,int screen,Visual *visual,Colormap colormap)123: {
124: int found,i,k,ncolors = PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS;
125: unsigned char R[PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS];
126: unsigned char G[PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS];
127: unsigned char B[PETSC_DRAW_MAXCOLOR-PETSC_DRAW_BASIC_COLORS];
128: Colormap defaultmap = DefaultColormap(display,screen);
129: XColor colordef;
130: PetscBool fast = PETSC_FALSE;
134: if (colormap) gColormap = colormap;
135: else gColormap = XCreateColormap(display,RootWindow(display,screen),visual,AllocAll);
137: cmap_base = 0;
139: PetscMemzero(cmap_pixvalues_used,sizeof(cmap_pixvalues_used));
141: /* set the basic colors into the color map */
142: for (i=0; i<PETSC_DRAW_BASIC_COLORS; i++) {
143: XParseColor(display,gColormap,colornames[i],&colordef);
144: /* try to allocate the color in the default-map */
145: found = XAllocColor(display,defaultmap,&colordef);
146: /* use it, if it it exists and is not already used in the new colormap */
147: if (found && colordef.pixel < PETSC_DRAW_MAXCOLOR && !cmap_pixvalues_used[colordef.pixel]) {
148: cmap_pixvalues_used[colordef.pixel] = PETSC_TRUE;
149: /* otherwise search for the next available slot */
150: } else {
151: while (cmap_pixvalues_used[cmap_base]) cmap_base++;
152: colordef.pixel = cmap_base;
153: cmap_pixvalues_used[cmap_base++] = PETSC_TRUE;
154: }
155: XStoreColor(display,gColormap,&colordef);
156: gCmapping[i] = colordef.pixel;
157: gCpalette[i][0] = (unsigned char)(colordef.red >> 8);
158: gCpalette[i][1] = (unsigned char)(colordef.green >> 8);
159: gCpalette[i][2] = (unsigned char)(colordef.blue >> 8);
160: }
162: /* set the contour colors into the colormap */
163: PetscOptionsGetBool(NULL,NULL,"-draw_fast",&fast,NULL);
164: PetscDrawUtilitySetCmap(NULL,ncolors,R,G,B);
165: for (i=0, k=PETSC_DRAW_BASIC_COLORS; i<ncolors; i++, k++) {
166: colordef.red = (unsigned short)(R[i] << 8);
167: colordef.green = (unsigned short)(G[i] << 8);
168: colordef.blue = (unsigned short)(B[i] << 8);
169: colordef.flags = DoRed|DoGreen|DoBlue;
170: colordef.pixel = gCmapping[PETSC_DRAW_BLACK];
171: if (!fast) {
172: /* try to allocate the color in the default-map */
173: found = XAllocColor(display,defaultmap,&colordef);
174: /* use it, if it it exists and is not already used in the new colormap */
175: if (found && colordef.pixel < PETSC_DRAW_MAXCOLOR && !cmap_pixvalues_used[colordef.pixel]) {
176: cmap_pixvalues_used[colordef.pixel] = PETSC_TRUE;
177: /* otherwise search for the next available slot */
178: } else {
179: while (cmap_pixvalues_used[cmap_base]) cmap_base++;
180: colordef.pixel = cmap_base;
181: cmap_pixvalues_used[cmap_base++] = PETSC_TRUE;
182: }
183: XStoreColor(display,gColormap,&colordef);
184: }
185: gCmapping[k] = colordef.pixel;
186: gCpalette[k][0] = R[i];
187: gCpalette[k][1] = G[i];
188: gCpalette[k][2] = B[i];
189: }
191: PetscInfo(0,"Successfully allocated colors\n");
192: return(0);
193: }
195: PetscErrorCode PetscDrawSetUpColormap_X(Display *display,int screen,Visual *visual,Colormap colormap)196: {
198: PetscBool sharedcolormap = PETSC_FALSE;
199: XVisualInfo vinfo;
202: PetscOptionsGetBool(NULL,NULL,"-draw_x_shared_colormap",&sharedcolormap,NULL);
203: /*
204: Need to determine if window supports allocating a private colormap,
205: */
206: if (XMatchVisualInfo(display,screen,24,StaticColor,&vinfo) ||
207: XMatchVisualInfo(display,screen,24,TrueColor,&vinfo) ||
208: XMatchVisualInfo(display,screen,16,StaticColor,&vinfo) ||
209: XMatchVisualInfo(display,screen,16,TrueColor,&vinfo) ||
210: XMatchVisualInfo(display,screen,15,StaticColor,&vinfo) ||
211: XMatchVisualInfo(display,screen,15,TrueColor,&vinfo)) sharedcolormap = PETSC_TRUE;
212: /*
213: Generate the X colormap object
214: */
215: if (sharedcolormap) {
216: PetscDrawSetUpColormap_Shared(display,screen,visual,colormap);
217: } else {
218: PetscDrawSetUpColormap_Private(display,screen,visual,colormap);
219: }
220: return(0);
221: }
223: PETSC_INTERN PetscErrorCode PetscDrawSetColormap_X(PetscDraw_X*,Colormap);
225: PetscErrorCode PetscDrawSetColormap_X(PetscDraw_X *XiWin,Colormap colormap)226: {
227: PetscBool fast = PETSC_FALSE;
231: PetscOptionsGetBool(NULL,NULL,"-draw_fast",&fast,NULL);
232: if (XiWin->depth < 8) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP_SYS,"PETSc Graphics require monitors with at least 8 bit color (256 colors)");
233: if (!gColormap) {
234: PetscDrawSetUpColormap_X(XiWin->disp,XiWin->screen,XiWin->vis,colormap);
235: }
236: XiWin->cmap = gColormap;
237: XiWin->cmapsize = fast ? PETSC_DRAW_BASIC_COLORS : PETSC_DRAW_MAXCOLOR;
238: PetscMemcpy(XiWin->cmapping,gCmapping,sizeof(XiWin->cmapping));
239: PetscMemcpy(XiWin->cpalette,gCpalette,sizeof(XiWin->cpalette));
240: XiWin->background = XiWin->cmapping[PETSC_DRAW_WHITE];
241: XiWin->foreground = XiWin->cmapping[PETSC_DRAW_BLACK];
242: return(0);
243: }
245: PetscErrorCode PetscDrawXiColormap(PetscDraw_X *XiWin)246: { return PetscDrawSetColormap_X(XiWin,(Colormap)0); }
248: /*
249: Color in X is many-layered. The first layer is the "visual",a
250: immutable attribute of a window set when the window is
251: created.
253: The next layer is the colormap. The installation of colormaps is
254: the buisness of the window manager (in some distant later release).
255: */
257: /*
258: This routine gets the visual class (PseudoColor, etc) and returns
259: it. It finds the default visual. Possible returns are
260: PseudoColor
261: StaticColor
262: DirectColor
263: TrueColor
264: GrayScale
265: StaticGray
266: */
267: PetscErrorCode PetscDrawXiSetVisualClass(PetscDraw_X *XiWin)268: {
269: XVisualInfo vinfo;
272: if (XMatchVisualInfo(XiWin->disp,XiWin->screen,24,DirectColor,&vinfo)) {
273: XiWin->vis = vinfo.visual;
274: } else if (XMatchVisualInfo(XiWin->disp,XiWin->screen,8,PseudoColor,&vinfo)) {
275: XiWin->vis = vinfo.visual;
276: } else if (XMatchVisualInfo(XiWin->disp,XiWin->screen,DefaultDepth(XiWin->disp,XiWin->screen),PseudoColor,&vinfo)) {
277: XiWin->vis = vinfo.visual;
278: } else {
279: XiWin->vis = DefaultVisual(XiWin->disp,XiWin->screen);
280: }
281: return(0);
282: }
284: PetscErrorCode PetscDrawXiSetColormap(PetscDraw_X *XiWin)285: {
287: XSetWindowColormap(XiWin->disp,XiWin->win,XiWin->cmap);
288: return(0);
289: }
291: /*
292: Get RGB color entries out of the X colormap
293: */
294: PetscErrorCode PetscDrawXiGetPalette(PetscDraw_X *XiWin,unsigned char palette[PETSC_DRAW_MAXCOLOR][3])
295: {
296: int k;
297: XColor colordef[PETSC_DRAW_MAXCOLOR];
300: for (k=0; k<PETSC_DRAW_MAXCOLOR; k++) {
301: colordef[k].pixel = XiWin->cmapping[k];
302: colordef[k].flags = DoRed|DoGreen|DoBlue;
303: }
304: XQueryColors(XiWin->disp,XiWin->cmap,colordef,PETSC_DRAW_MAXCOLOR);
305: for (k=0; k<PETSC_DRAW_MAXCOLOR; k++) {
306: palette[k][0] = (unsigned char)(colordef[k].red >> 8);
307: palette[k][1] = (unsigned char)(colordef[k].green >> 8);
308: palette[k][2] = (unsigned char)(colordef[k].blue >> 8);
309: }
310: return(0);
311: }