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;
  93     XImage *im = NULL;
  94     Pixmap oldp;
  95
  96     if (w <= 0 || h <= 0 || x+w <= 0 || y+h <= 0) return;
  97
  98     g_assert(l->surface.type == Surface_Planar);
  99
 100     oldp = l->pixmap; /* save to free after changing the visible pixmap */
 101     l->pixmap = XCreatePixmap(ob_display, ob_root, x+w, y+h, render_depth);
 102     g_assert(l->pixmap != None);
 103
 104     if (l->xftdraw != NULL)
 105         XftDrawDestroy(l->xftdraw);
 106     l->xftdraw = XftDrawCreate(ob_display, l->pixmap, render_visual,
 107                                render_colormap);
 108     g_assert(l->xftdraw != NULL);
 109
 110     g_free(l->surface.data.planar.pixel_data);
 111     l->surface.data.planar.pixel_data = g_new(pixel32, w * h);
 112
 113
 114     if (l->surface.data.planar.grad == Background_ParentRelative) {
 115         memset(l->surface.data.planar.pixel_data, 0xFF, w*h*4);
 116     }
 117     else if (l->surface.data.planar.grad == Background_Solid)
 118         gradient_solid(l, x, y, w, h);
 119     else gradient_render(&l->surface, w, h);
 120
 121 /*this is not the right place for this code, it's only here so
 122   text rendering shows up for now.
 123 */
 124     if (l->surface.data.planar.grad != Background_Solid) {
 125         im = XCreateImage(ob_display, render_visual, render_depth,
 126                           ZPixmap, 0, NULL, w, h, 32, 0);
 127         g_assert(im != NULL);
 128         im->byte_order = endian;
 129         im->data = (char *)l->surface.data.planar.pixel_data;
 130         reduce_depth((pixel32*)im->data, im);
 131         XPutImage(ob_display, l->pixmap, DefaultGC(ob_display, ob_screen),
 132                   im, 0, 0, x, y, w, h);
 133         im->data = NULL;
 134         XDestroyImage(im);
 135     }
 136
 137     for (i = 0; i < l->textures; i++) {
 138         switch (l->texture[i].type) {
 139         case Text:
 140             if (l->xftdraw == NULL) {
 141                 l->xftdraw = XftDrawCreate(ob_display, l->pixmap,
 142                                         render_visual, render_colormap);
 143             }
 144             font_draw(l->xftdraw, &l->texture[i].data.text,
 145                       &l->texture[i].position);
 146         break;
 147         case Bitmask:
 148             if (l->texture[i].data.mask.color->gc == None)
 149                 color_allocate_gc(l->texture[i].data.mask.color);
 150             mask_draw(l->pixmap, &l->texture[i].data.mask,
 151                       &l->texture[i].position);
 152         break;
 153         case RGBA:
 154             image_draw(l->surface.data.planar.pixel_data,
 155                        &l->texture[i].data.rgba,
 156                        &l->texture[i].position);
 157         break;
 158         }
 159     }
 160     XSetWindowBackgroundPixmap(ob_display, win, l->pixmap);
 161     XClearWindow(ob_display, win);
 162     if (oldp != None) XFreePixmap(ob_display, oldp);
 163 }
 164
 165 /*
 166 void gl_paint(Window win, Appearance *l)
 167 {
 168     glXMakeCurrent(ob_display, win, gl_context);
 169 }
 170 */
 171
 172 void render_shutdown(void)
 173 {
 174 }
 175
 176 Appearance *appearance_new(SurfaceType type, int numtex)
 177 {
 178   PlanarSurface *p;
 179   Appearance *out;
 180
 181   out = g_new(Appearance, 1);
 182   out->surface.type = type;
 183   out->textures = numtex;
 184   out->xftdraw = NULL;
 185   if (numtex) out->texture = g_new0(Texture, numtex);
 186   else out->texture = NULL;
 187   out->pixmap = None;
 188
 189   switch (type) {
 190   case Surface_Planar:
 191     p = &out->surface.data.planar;
 192     p->primary = NULL;
 193     p->secondary = NULL;
 194     p->border_color = NULL;
 195     p->pixel_data = NULL;
 196     break;
 197   }
 198   return out;
 199 }
 200
 201 Appearance *appearance_copy(Appearance *orig)
 202 {
 203     PlanarSurface *spo, *spc;
 204     Appearance *copy = g_new(Appearance, 1);
 205     copy->surface.type = orig->surface.type;
 206     switch (orig->surface.type) {
 207     case Surface_Planar:
 208         spo = &(orig->surface.data.planar);
 209         spc = &(copy->surface.data.planar);
 210         spc->grad = spo->grad;
 211         spc->relief = spo->relief;
 212         spc->bevel = spo->bevel;
 213         if (spo->primary != NULL)
 214             spc->primary = color_new(spo->primary->r,
 215                                      spo->primary->g,
 216                                      spo->primary->b);
 217         else spc->primary = NULL;
 218
 219         if (spo->secondary != NULL)
 220             spc->secondary = color_new(spo->secondary->r,
 221                                        spo->secondary->g,
 222                                        spo->secondary->b);
 223         else spc->secondary = NULL;
 224
 225         if (spo->border_color != NULL)
 226             spc->border_color = color_new(spo->border_color->r,
 227                                           spo->border_color->g,
 228                                           spo->border_color->b);
 229         else spc->border_color = NULL;
 230
 231         spc->interlaced = spo->interlaced;
 232         spc->border = spo->border;
 233         spc->pixel_data = NULL;
 234     break;
 235     }
 236     copy->textures = orig->textures;
 237     copy->texture = g_memdup(orig->texture, orig->textures * sizeof(Texture));
 238     copy->pixmap = None;
 239     copy->xftdraw = NULL;
 240     return copy;
 241 }
 242
 243 void appearance_free(Appearance *a)
 244 {
 245     PlanarSurface *p;
 246     if (a->pixmap != None) XFreePixmap(ob_display, a->pixmap);
 247     if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 248     if (a->textures)
 249         g_free(a->texture);
 250     if (a->surface.type == Surface_Planar) {
 251         p = &a->surface.data.planar;
 252         if (p->primary != NULL) color_free(p->primary);
 253         if (p->secondary != NULL) color_free(p->secondary);
 254         if (p->border_color != NULL) color_free(p->border_color);
 255         if (p->pixel_data != NULL) g_free(p->pixel_data);
 256     }
 257     g_free(a);
 258 }