diff options
Diffstat (limited to 'render/instance.c')
| -rw-r--r-- | render/instance.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/render/instance.c b/render/instance.c new file mode 100644 index 00000000..bd2b537e --- /dev/null +++ b/render/instance.c @@ -0,0 +1,247 @@ +#include "render.h" +#include "instance.h" + +static RrInstance *definst = NULL; + +void RrTrueColorSetup (RrInstance *inst); +void RrPseudoColorSetup (RrInstance *inst); + +RrInstance* RrInstanceNew (Display *display, gint screen) +{ + definst = g_new (RrInstance, 1); + definst->display = display; + definst->screen = screen; + + definst->depth = DefaultDepth(display, screen); + definst->visual = DefaultVisual(display, screen); + definst->colormap = DefaultColormap(display, screen); + + definst->pseudo_colors = NULL; + + switch (definst->visual->class) { + case TrueColor: + RrTrueColorSetup(definst); + break; + case PseudoColor: + case StaticColor: + case GrayScale: + case StaticGray: + RrPseudoColorSetup(definst); + break; + default: + g_critical("Unsupported visual class"); + g_free (definst); + return definst = NULL; + } + return definst; +} + +void RrTrueColorSetup (RrInstance *inst) +{ + unsigned long red_mask, green_mask, blue_mask; + XImage *timage = NULL; + + timage = XCreateImage(inst->display, inst->visual, inst->depth, + ZPixmap, 0, NULL, 1, 1, 32, 0); + g_assert(timage != NULL); + /* find the offsets for each color in the visual's masks */ + inst->red_mask = red_mask = timage->red_mask; + inst->green_mask = green_mask = timage->green_mask; + inst->blue_mask = blue_mask = timage->blue_mask; + + inst->red_offset = 0; + inst->green_offset = 0; + inst->blue_offset = 0; + + while (! (red_mask & 1)) { inst->red_offset++; red_mask >>= 1; } + while (! (green_mask & 1)) { inst->green_offset++; green_mask >>= 1; } + while (! (blue_mask & 1)) { inst->blue_offset++; blue_mask >>= 1; } + + inst->red_shift = inst->green_shift = inst->blue_shift = 8; + while (red_mask) { red_mask >>= 1; inst->red_shift--; } + while (green_mask) { green_mask >>= 1; inst->green_shift--; } + while (blue_mask) { blue_mask >>= 1; inst->blue_shift--; } + XFree(timage); +} + +#define RrPseudoNcolors(isnt) (1 << (inst->pseudo_bpc * 3)) + +void RrPseudoColorSetup (RrInstance *inst) +{ + XColor icolors[256]; + int tr, tg, tb, n, r, g, b, i, incolors, ii; + unsigned long dev; + int cpc, _ncolors; + g_message("Initializing PseudoColor RenderControl\n"); + + /* determine the number of colors and the bits-per-color */ + inst->pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */ + g_assert(inst->pseudo_bpc >= 1); + _ncolors = RrPseudoNcolors(inst); + + if (_ncolors > 1 << inst->depth) { + g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n"); + inst->pseudo_bpc = 1 << (inst->depth/3) >> 3; + _ncolors = 1 << (inst->pseudo_bpc * 3); + } + + /* build a color cube */ + inst->pseudo_colors = g_new(XColor, _ncolors); + cpc = 1 << inst->pseudo_bpc; /* colors per channel */ + + for (n = 0, r = 0; r < cpc; r++) + for (g = 0; g < cpc; g++) + for (b = 0; b < cpc; b++, n++) { + tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF); + tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF); + tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF); + inst->pseudo_colors[n].red = tr | tr << 8; + inst->pseudo_colors[n].green = tg | tg << 8; + inst->pseudo_colors[n].blue = tb | tb << 8; + /* used to track allocation */ + inst->pseudo_colors[n].flags = DoRed|DoGreen|DoBlue; + } + + /* allocate the colors */ + for (i = 0; i < _ncolors; i++) + if (!XAllocColor(inst->display, inst->colormap, + &inst->pseudo_colors[i])) + inst->pseudo_colors[i].flags = 0; /* mark it as unallocated */ + + /* try allocate any colors that failed allocation above */ + + /* get the allocated values from the X server + (only the first 256 XXX why!?) + */ + incolors = (((1 << inst->depth) > 256) ? 256 : (1 << inst->depth)); + for (i = 0; i < incolors; i++) + icolors[i].pixel = i; + XQueryColors(inst->display, inst->colormap, icolors, incolors); + + /* try match unallocated ones */ + for (i = 0; i < _ncolors; i++) { + if (!inst->pseudo_colors[i].flags) { /* if it wasn't allocated... */ + unsigned long closest = 0xffffffff, close = 0; + for (ii = 0; ii < incolors; ii++) { + /* find deviations */ + r = (inst->pseudo_colors[i].red - icolors[ii].red) & 0xff; + g = (inst->pseudo_colors[i].green - icolors[ii].green) & 0xff; + b = (inst->pseudo_colors[i].blue - icolors[ii].blue) & 0xff; + /* find a weighted absolute deviation */ + dev = (r * r) + (g * g) + (b * b); + + if (dev < closest) { + closest = dev; + close = ii; + } + } + + inst->pseudo_colors[i].red = icolors[close].red; + inst->pseudo_colors[i].green = icolors[close].green; + inst->pseudo_colors[i].blue = icolors[close].blue; + inst->pseudo_colors[i].pixel = icolors[close].pixel; + + /* try alloc this closest color, it had better succeed! */ + if (XAllocColor(inst->display, inst->colormap, + &inst->pseudo_colors[i])) + /* mark as alloced */ + inst->pseudo_colors[i].flags = DoRed|DoGreen|DoBlue; + else + /* wtf has gone wrong, its already alloced for chissake! */ + g_assert_not_reached(); + } + } +} + +void RrInstanceFree (RrInstance *inst) +{ + if (inst) { + if (inst == definst) definst = NULL; + g_free(inst->pseudo_colors); + } +} + +Display* RrDisplay (const RrInstance *inst) +{ + return (inst ? inst : definst)->display; +} + +gint RrScreen (const RrInstance *inst) +{ + return (inst ? inst : definst)->screen; +} + +Window RrRootWindow (const RrInstance *inst) +{ + return RootWindow (RrDisplay (inst), RrScreen (inst)); +} + +Visual *RrVisual (const RrInstance *inst) +{ + return (inst ? inst : definst)->visual; +} + +gint RrDepth (const RrInstance *inst) +{ + return (inst ? inst : definst)->depth; +} + +Colormap RrColormap (const RrInstance *inst) +{ + return (inst ? inst : definst)->colormap; +} + +gint RrRedOffset (const RrInstance *inst) +{ + return (inst ? inst : definst)->red_offset; +} + +gint RrGreenOffset (const RrInstance *inst) +{ + return (inst ? inst : definst)->green_offset; +} + +gint RrBlueOffset (const RrInstance *inst) +{ + return (inst ? inst : definst)->blue_offset; +} + +gint RrRedShift (const RrInstance *inst) +{ + return (inst ? inst : definst)->red_shift; +} + +gint RrGreenShift (const RrInstance *inst) +{ + return (inst ? inst : definst)->green_shift; +} + +gint RrBlueShift (const RrInstance *inst) +{ + return (inst ? inst : definst)->blue_shift; +} + +gint RrRedMask (const RrInstance *inst) +{ + return (inst ? inst : definst)->red_mask; +} + +gint RrGreenMask (const RrInstance *inst) +{ + return (inst ? inst : definst)->green_mask; +} + +gint RrBlueMask (const RrInstance *inst) +{ + return (inst ? inst : definst)->blue_mask; +} + +guint RrPseudoBPC (const RrInstance *inst) +{ + return (inst ? inst : definst)->pseudo_bpc; +} + +XColor *RrPseudoColors (const RrInstance *inst) +{ + return (inst ? inst : definst)->pseudo_colors; +} |