render/render.c

   1 #include <X11/Xlib.h>
   2 #include <X11/Xutil.h>
   3 #include <glib.h>
   4 #include "render.h"
   5 #include "gradient.h"
   6 #include "font.h"
   7 #include "mask.h"
   8 #include "color.h"
   9 #include "../kernel/openbox.h"
  10
  11 int render_depth;
  12 Visual *render_visual;
  13 Colormap render_colormap;
  14 int render_red_offset = 0, render_green_offset = 0, render_blue_offset = 0;
  15 int render_red_shift, render_green_shift, render_blue_shift;
  16
  17 void render_startup(void)
  18 {
  19     paint = x_paint;
  20
  21     render_depth = DefaultDepth(ob_display, ob_screen);
  22     render_visual = DefaultVisual(ob_display, ob_screen);
  23     render_colormap = DefaultColormap(ob_display, ob_screen);
  24
  25     if (render_depth < 8) {
  26       XVisualInfo vinfo_template, *vinfo_return;
  27       // search for a TrueColor Visual... if we can't find one...
  28       // we will use the default visual for the screen
  29       int vinfo_nitems;
  30       int best = -1;
  31
  32       vinfo_template.screen = ob_screen;
  33       vinfo_template.class = TrueColor;
  34       vinfo_return = XGetVisualInfo(ob_display,
  35                                     VisualScreenMask | VisualClassMask,
  36                                     &vinfo_template, &vinfo_nitems);
  37       if (vinfo_return) {
  38         int i;
  39         int max_depth = 1;
  40         for (i = 0; i < vinfo_nitems; ++i) {
  41           if (vinfo_return[i].depth > max_depth) {
  42             if (max_depth == 24 && vinfo_return[i].depth > 24)
  43               break;          // prefer 24 bit over 32
  44             max_depth = vinfo_return[i].depth;
  45             best = i;
  46           }
  47         }
  48         if (max_depth < render_depth) best = -1;
  49       }
  50       if (best != -1) {
  51         render_depth = vinfo_return[best].depth;
  52         render_visual = vinfo_return[best].visual;
  53         render_colormap = XCreateColormap(ob_display, ob_root, render_visual,
  54                                           AllocNone);
  55       }
  56       XFree(vinfo_return);
  57     }
  58   truecolor_startup();
  59 }
  60
  61 void truecolor_startup(void)
  62 {
  63   unsigned long red_mask, green_mask, blue_mask;
  64   XImage *timage = NULL;
  65
  66   timage = XCreateImage(ob_display, render_visual, render_depth,
  67                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  68   g_assert(timage != NULL);
  69   // find the offsets for each color in the visual's masks
  70   red_mask = timage->red_mask;
  71   green_mask = timage->green_mask;
  72   blue_mask = timage->blue_mask;
  73
  74   render_red_offset = 0;
  75   render_green_offset = 0;
  76   render_blue_offset = 0;
  77
  78   while (! (red_mask & 1))   { render_red_offset++;   red_mask   >>= 1; }
  79   while (! (green_mask & 1)) { render_green_offset++; green_mask >>= 1; }
  80   while (! (blue_mask & 1))  { render_blue_offset++;  blue_mask  >>= 1; }
  81
  82   render_red_shift = render_green_shift = render_blue_shift = 8;
  83   while (red_mask)   { red_mask   >>= 1; render_red_shift--;   }
  84   while (green_mask) { green_mask >>= 1; render_green_shift--; }
  85   while (blue_mask)  { blue_mask  >>= 1; render_blue_shift--;  }
  86   XFree(timage);
  87 }
  88
  89 void x_paint(Window win, Appearance *l, int x, int y, int w, int h)
  90 {
  91     int i;
  92     XImage *im = NULL;
  93     Pixmap oldp;
  94
  95     if (w <= 0 || h <= 0) return;
  96
  97     g_assert(l->surface.type == Surface_Planar);
  98
  99     oldp = l->pixmap; /* save to free after changing the visible pixmap */
 100     l->pixmap = XCreatePixmap(ob_display, ob_root, x+w, y+h, render_depth);
 101     g_assert(l->pixmap != None);
 102
 103     if (l->xftdraw != NULL)
 104         XftDrawDestroy(l->xftdraw);
 105     l->xftdraw = XftDrawCreate(ob_display, l->pixmap, render_visual,
 106                                render_colormap);
 107     g_assert(l->xftdraw != NULL);
 108
 109     if (l->surface.data.planar.pixel_data != NULL)
 110         g_free(l->surface.data.planar.pixel_data);
 111     l->surface.data.planar.pixel_data = g_new(pixel32, w * h);
 112
 113     if (l->surface.data.planar.grad == Background_Solid)
 114         gradient_solid(l, x, y, w, h);
 115     else gradient_render(&l->surface, w, h);
 116
 117 /*this is not the right place for this code, it's only here so
 118   text rendering shows up for now.
 119 */
 120     if (l->surface.data.planar.grad != Background_Solid) {
 121         im = XCreateImage(ob_display, render_visual, render_depth,
 122                           ZPixmap, 0, NULL, w, h, 32, 0);
 123         g_assert(im != NULL);
 124         im->byte_order = endian;
 125         im->data = (unsigned char *)l->surface.data.planar.pixel_data;
 126         reduce_depth(im->data, im);
 127         XPutImage(ob_display, l->pixmap, DefaultGC(ob_display, ob_screen),
 128                   im, 0, 0, x, y, w, h);
 129         im->data = NULL;
 130         XDestroyImage(im);
 131     }
 132
 133     for (i = 0; i < l->textures; i++) {
 134         switch (l->texture[i].type) {
 135         case Text:
 136             if (l->xftdraw == NULL) {
 137                 l->xftdraw = XftDrawCreate(ob_display, l->pixmap,
 138                                         render_visual, render_colormap);
 139             }
 140             font_draw(l->xftdraw, &l->texture[i].data.text, x, y, w, h);
 141         break;
 142         case Bitmask:
 143             if (l->texture[i].data.mask.color->gc == None)
 144                 color_allocate_gc(l->texture[i].data.mask.color);
 145             mask_draw(l->pixmap, &l->texture[i].data.mask, w, h);
 146         break;
 147         }
 148     }
 149     XSetWindowBackgroundPixmap(ob_display, win, l->pixmap);
 150     XClearWindow(ob_display, win);
 151     if (oldp != None) XFreePixmap(ob_display, oldp);
 152 }
 153
 154 /*
 155 void gl_paint(Window win, Appearance *l)
 156 {
 157     glXMakeCurrent(ob_display, win, gl_context);
 158 }
 159 */
 160
 161 void render_shutdown(void)
 162 {
 163 }
 164
 165 Appearance *appearance_new(SurfaceType type, int numtex)
 166 {
 167   PlanarSurface *p;
 168   Appearance *out;
 169
 170   out = g_new(Appearance, 1);
 171   out->surface.type = type;
 172   out->textures = numtex;
 173   out->xftdraw = NULL;
 174   if (numtex) out->texture = g_new(Texture, numtex);
 175   else out->texture = NULL;
 176   out->pixmap = None;
 177
 178   switch (type) {
 179   case Surface_Planar:
 180     p = &out->surface.data.planar;
 181     p->primary = NULL;
 182     p->secondary = NULL;
 183     p->border_color = NULL;
 184     p->pixel_data = NULL;
 185     break;
 186   }
 187   return out;
 188 }
 189
 190 Appearance *appearance_copy(Appearance *orig)
 191 {
 192     PlanarSurface *spo, *spc;
 193     Appearance *copy = g_new(Appearance, 1);
 194     copy->surface.type = orig->surface.type;
 195     switch (orig->surface.type) {
 196     case Surface_Planar:
 197         spo = &(orig->surface.data.planar);
 198         spc = &(copy->surface.data.planar);
 199         spc->grad = spo->grad;
 200         spc->relief = spo->relief;
 201         spc->bevel = spo->bevel;
 202         if (spo->primary != NULL)
 203             spc->primary = color_new(spo->primary->r,
 204                                      spo->primary->g,
 205                                      spo->primary->b);
 206         else spc->primary = NULL;
 207
 208         if (spo->secondary != NULL)
 209             spc->secondary = color_new(spo->secondary->r,
 210                                        spo->secondary->g,
 211                                        spo->secondary->b);
 212         else spc->secondary = NULL;
 213
 214         if (spo->border_color != NULL)
 215             spc->border_color = color_new(spo->border_color->r,
 216                                           spo->border_color->g,
 217                                           spo->border_color->b);
 218         else spc->border_color = NULL;
 219
 220         spc->interlaced = spo->interlaced;
 221         spc->border = spo->border;
 222         spc->pixel_data = NULL;
 223     break;
 224     }
 225     copy->textures = orig->textures;
 226     copy->texture = g_memdup(orig->texture, orig->textures * sizeof(Texture));
 227     copy->pixmap = None;
 228     copy->xftdraw = NULL;
 229     return copy;
 230 }
 231
 232 void appearance_free(Appearance *a)
 233 {
 234     PlanarSurface *p;
 235     if (a->pixmap != None) XFreePixmap(ob_display, a->pixmap);
 236     if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 237     if (a->textures)
 238         g_free(a->texture);
 239     if (a->surface.type == Surface_Planar) {
 240         p = &a->surface.data.planar;
 241         if (p->primary != NULL) color_free(p->primary);
 242         if (p->secondary != NULL) color_free(p->secondary);
 243         if (p->border_color != NULL) color_free(p->border_color);
 244         if (p->pixel_data != NULL) g_free(p->pixel_data);
 245     }
 246     g_free(a);
 247 }