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 "image.h"
  10 #include "../kernel/openbox.h"
  11
  12 int render_depth;
  13 Visual *render_visual;
  14 Colormap render_colormap;
  15 int render_red_offset = 0, render_green_offset = 0, render_blue_offset = 0;
  16 int render_red_shift, render_green_shift, render_blue_shift;
  17
  18 void render_startup(void)
  19 {
  20     paint = x_paint;
  21
  22     render_depth = DefaultDepth(ob_display, ob_screen);
  23     render_visual = DefaultVisual(ob_display, ob_screen);
  24     render_colormap = DefaultColormap(ob_display, ob_screen);
  25
  26     if (render_depth < 8) {
  27       XVisualInfo vinfo_template, *vinfo_return;
  28       /* search for a TrueColor Visual... if we can't find one...
  29          we will use the default visual for the screen */
  30       int vinfo_nitems;
  31       int best = -1;
  32
  33       vinfo_template.screen = ob_screen;
  34       vinfo_template.class = TrueColor;
  35       vinfo_return = XGetVisualInfo(ob_display,
  36                                     VisualScreenMask | VisualClassMask,
  37                                     &vinfo_template, &vinfo_nitems);
  38       if (vinfo_return) {
  39         int i;
  40         int max_depth = 1;
  41         for (i = 0; i < vinfo_nitems; ++i) {
  42           if (vinfo_return[i].depth > max_depth) {
  43             if (max_depth == 24 && vinfo_return[i].depth > 24)
  44                 break;          /* prefer 24 bit over 32 */
  45             max_depth = vinfo_return[i].depth;
  46             best = i;
  47           }
  48         }
  49         if (max_depth < render_depth) best = -1;
  50       }
  51       if (best != -1) {
  52         render_depth = vinfo_return[best].depth;
  53         render_visual = vinfo_return[best].visual;
  54         render_colormap = XCreateColormap(ob_display, ob_root, render_visual,
  55                                           AllocNone);
  56       }
  57       XFree(vinfo_return);
  58     }
  59   truecolor_startup();
  60 }
  61
  62 void truecolor_startup(void)
  63 {
  64   unsigned long red_mask, green_mask, blue_mask;
  65   XImage *timage = NULL;
  66
  67   timage = XCreateImage(ob_display, render_visual, render_depth,
  68                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  69   g_assert(timage != NULL);
  70   /* find the offsets for each color in the visual's masks */
  71   red_mask = timage->red_mask;
  72   green_mask = timage->green_mask;
  73   blue_mask = timage->blue_mask;
  74
  75   render_red_offset = 0;
  76   render_green_offset = 0;
  77   render_blue_offset = 0;
  78
  79   while (! (red_mask & 1))   { render_red_offset++;   red_mask   >>= 1; }
  80   while (! (green_mask & 1)) { render_green_offset++; green_mask >>= 1; }
  81   while (! (blue_mask & 1))  { render_blue_offset++;  blue_mask  >>= 1; }
  82
  83   render_red_shift = render_green_shift = render_blue_shift = 8;
  84   while (red_mask)   { red_mask   >>= 1; render_red_shift--;   }
  85   while (green_mask) { green_mask >>= 1; render_green_shift--; }
  86   while (blue_mask)  { blue_mask  >>= 1; render_blue_shift--;  }
  87   XFree(timage);
  88 }
  89
  90 void x_paint(Window win, Appearance *l, int x, int y, int w, int h)
  91 {
  92     int i, transferred = 0;
  93     Pixmap oldp;
  94
  95     if (w <= 0 || h <= 0 || x+w <= 0 || y+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     g_free(l->surface.data.planar.pixel_data);
 110     l->surface.data.planar.pixel_data = g_new(pixel32, w * h);
 111
 112
 113     if (l->surface.data.planar.grad == Background_ParentRelative) {
 114         memset(l->surface.data.planar.pixel_data, 0, w*h*4);
 115     }
 116     else if (l->surface.data.planar.grad == Background_Solid)
 117         gradient_solid(l, x, y, w, h);
 118     else gradient_render(&l->surface, w, h);
 119
 120     for (i = 0; i < l->textures; i++) {
 121         switch (l->texture[i].type) {
 122         case Text:
 123             if (!transferred) {
 124                 transferred = 1;
 125                 if (l->surface.data.planar.grad != Background_Solid)
 126                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 127                                       l->pixmap,x,y,w,h);
 128             }
 129             if (l->xftdraw == NULL) {
 130                 l->xftdraw = XftDrawCreate(ob_display, l->pixmap,
 131                                         render_visual, render_colormap);
 132             }
 133             font_draw(l->xftdraw, &l->texture[i].data.text,
 134                       &l->texture[i].position);
 135         break;
 136         case Bitmask:
 137             if (!transferred) {
 138                 transferred = 1;
 139                 if (l->surface.data.planar.grad != Background_Solid)
 140                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 141                                       l->pixmap,x,y,w,h);
 142             }
 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,
 146                       &l->texture[i].position);
 147         break;
 148         case RGBA:
 149             image_draw(l->surface.data.planar.pixel_data,
 150                        &l->texture[i].data.rgba,
 151                        &l->texture[i].position);
 152         break;
 153         }
 154     }
 155
 156     if (!transferred) {
 157         transferred = 1;
 158         if (l->surface.data.planar.grad != Background_Solid)
 159             pixel32_to_pixmap(l->surface.data.planar.pixel_data, l->pixmap
 160                               ,x,y,w,h);
 161     }
 162
 163
 164     XSetWindowBackgroundPixmap(ob_display, win, l->pixmap);
 165     XClearWindow(ob_display, win);
 166     if (oldp != None) XFreePixmap(ob_display, oldp);
 167 }
 168
 169 /*
 170 void gl_paint(Window win, Appearance *l)
 171 {
 172     glXMakeCurrent(ob_display, win, gl_context);
 173 }
 174 */
 175
 176 void render_shutdown(void)
 177 {
 178 }
 179
 180 Appearance *appearance_new(SurfaceType type, int numtex)
 181 {
 182   PlanarSurface *p;
 183   Appearance *out;
 184
 185   out = g_new(Appearance, 1);
 186   out->surface.type = type;
 187   out->textures = numtex;
 188   out->xftdraw = NULL;
 189   if (numtex) out->texture = g_new0(Texture, numtex);
 190   else out->texture = NULL;
 191   out->pixmap = None;
 192
 193   switch (type) {
 194   case Surface_Planar:
 195     p = &out->surface.data.planar;
 196     p->primary = NULL;
 197     p->secondary = NULL;
 198     p->border_color = NULL;
 199     p->pixel_data = NULL;
 200     break;
 201   }
 202   return out;
 203 }
 204
 205 Appearance *appearance_copy(Appearance *orig)
 206 {
 207     PlanarSurface *spo, *spc;
 208     Appearance *copy = g_new(Appearance, 1);
 209     copy->surface.type = orig->surface.type;
 210     switch (orig->surface.type) {
 211     case Surface_Planar:
 212         spo = &(orig->surface.data.planar);
 213         spc = &(copy->surface.data.planar);
 214         spc->grad = spo->grad;
 215         spc->relief = spo->relief;
 216         spc->bevel = spo->bevel;
 217         if (spo->primary != NULL)
 218             spc->primary = color_new(spo->primary->r,
 219                                      spo->primary->g,
 220                                      spo->primary->b);
 221         else spc->primary = NULL;
 222
 223         if (spo->secondary != NULL)
 224             spc->secondary = color_new(spo->secondary->r,
 225                                        spo->secondary->g,
 226                                        spo->secondary->b);
 227         else spc->secondary = NULL;
 228
 229         if (spo->border_color != NULL)
 230             spc->border_color = color_new(spo->border_color->r,
 231                                           spo->border_color->g,
 232                                           spo->border_color->b);
 233         else spc->border_color = NULL;
 234
 235         spc->interlaced = spo->interlaced;
 236         spc->border = spo->border;
 237         spc->pixel_data = NULL;
 238     break;
 239     }
 240     copy->textures = orig->textures;
 241     copy->texture = g_memdup(orig->texture, orig->textures * sizeof(Texture));
 242     copy->pixmap = None;
 243     copy->xftdraw = NULL;
 244     return copy;
 245 }
 246
 247 void appearance_free(Appearance *a)
 248 {
 249     PlanarSurface *p;
 250     if (a->pixmap != None) XFreePixmap(ob_display, a->pixmap);
 251     if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 252     if (a->textures)
 253         g_free(a->texture);
 254     if (a->surface.type == Surface_Planar) {
 255         p = &a->surface.data.planar;
 256         if (p->primary != NULL) color_free(p->primary);
 257         if (p->secondary != NULL) color_free(p->secondary);
 258         if (p->border_color != NULL) color_free(p->border_color);
 259         if (p->pixel_data != NULL) g_free(p->pixel_data);
 260     }
 261     g_free(a);
 262 }
 263
 264
 265 void pixel32_to_pixmap(pixel32 *in, Pixmap out, int x, int y, int w, int h)
 266 {
 267     XImage *im = NULL;
 268     im = XCreateImage(ob_display, render_visual, render_depth,
 269                       ZPixmap, 0, NULL, w, h, 32, 0);
 270     g_assert(im != NULL);
 271     im->byte_order = endian;
 272     im->data = (char *)in;
 273     reduce_depth((pixel32*)im->data, im);
 274     XPutImage(ob_display, out, DefaultGC(ob_display, ob_screen),
 275               im, 0, 0, x, y, w, h);
 276     im->data = NULL;
 277     XDestroyImage(im);
 278 }