1: /*
  2:    Defines the internal data structures for the X-windows
  3:    implementation of the graphics functionality in PETSc.
  4: */

  6: #pragma once
  7: #include <petsc/private/drawimpl.h>

  9: #include <X11/Xlib.h>
 10: #include <X11/Xutil.h>

 12: typedef unsigned long PetscDrawXiPixVal;

 14: typedef struct {
 15:   GC                set;
 16:   PetscDrawXiPixVal cur_pix;
 17: } PetscDrawXiGC;

 19: typedef struct {
 20:   Font              fnt;
 21:   int               font_w, font_h;
 22:   int               font_descent;
 23:   PetscDrawXiPixVal font_pix;
 24: } PetscDrawXiFont;

 26: typedef struct {
 27:   Display          *disp;                             /* Display */
 28:   int               screen;                           /* Screen of display */
 29:   Visual           *vis;                              /* Graphics visual */
 30:   int               depth;                            /* Depth of visual */
 31:   PetscDrawXiGC     gc;                               /* Graphics context */
 32:   PetscDrawXiFont  *font;                             /* Current font */
 33:   Window            win;                              /* Window */
 34:   Drawable          drw;                              /* Pixmap */
 35:   Colormap          cmap;                             /* Colormap */
 36:   int               cmapsize;                         /* Number of allocated colors */
 37:   PetscDrawXiPixVal foreground;                       /* Foreground pixel */
 38:   PetscDrawXiPixVal background;                       /* Background pixel */
 39:   PetscDrawXiPixVal cmapping[PETSC_DRAW_MAXCOLOR];    /* Map color -> pixel value */
 40:   unsigned char     cpalette[PETSC_DRAW_MAXCOLOR][3]; /* Map color -> RGB value*/
 41:   int               x, y, w, h;                       /* Location and size window */
 42: } PetscDraw_X;

 44: #define PetscDrawXiDrawable(w) ((w)->drw ? (w)->drw : (w)->win)

 46: static inline void PetscDrawXiSetPixVal(PetscDraw_X *W, PetscDrawXiPixVal pix)
 47: {
 48:   if (W->gc.cur_pix != pix) {
 49:     XSetForeground(W->disp, W->gc.set, pix);
 50:     W->gc.cur_pix = pix;
 51:   }
 52: }

 54: #if defined(PETSC_USE_DEBUG)
 55:   #define PetscDrawXiValidColor(W, color) PetscCheck((color) >= 0 && (color) < PETSC_DRAW_MAXCOLOR, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Color value %d out of range [0..%d]", color, PETSC_DRAW_MAXCOLOR - 1)
 56: #else
 57:   #define PetscDrawXiValidColor(W, color) \
 58:     do { \
 59:     } while (0)
 60: #endif

 62: #define PetscDrawXiSetColor(W, color) \
 63:   do { \
 64:     PetscDrawXiValidColor(W, color); \
 65:     PetscDrawXiSetPixVal(W, (W)->cmapping[(color)]); \
 66:   } while (0)

 68: PETSC_INTERN PetscErrorCode PetscDrawXiInit(PetscDraw_X *, const char[]);
 69: PETSC_INTERN PetscErrorCode PetscDrawXiClose(PetscDraw_X *);
 70: PETSC_INTERN PetscErrorCode PetscDrawXiFontFixed(PetscDraw_X *, int, int, PetscDrawXiFont **);
 71: PETSC_INTERN PetscErrorCode PetscDrawXiColormap(PetscDraw_X *);
 72: PETSC_INTERN PetscErrorCode PetscDrawXiQuickWindow(PetscDraw_X *, char *, int, int, int, int);
 73: PETSC_INTERN PetscErrorCode PetscDrawXiQuickWindowFromWindow(PetscDraw_X *, Window);
 74: PETSC_INTERN PetscErrorCode PetscDrawXiQuickPixmap(PetscDraw_X *);
 75: PETSC_INTERN PetscErrorCode PetscDrawXiResizeWindow(PetscDraw_X *, int, int);
 76: PETSC_INTERN PetscErrorCode PetscDrawXiGetGeometry(PetscDraw_X *, int *, int *, int *, int *);