--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/libgutil.c	Tue Aug 22 13:18:21 2017 +0300
@@ -0,0 +1,162 @@
+/*
+ * Common graphics utility functions for tools
+ * Programmed and designed by Matti 'ccr' Hamalainen
+ * (C) Copyright 2012-2015 Tecnic Software productions (TNSP)
+ *
+ * Please read file 'COPYING' for information on license and distribution.
+ */
+#include "libgutil.h"
+
+
+void dmFillRect(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 col)
+{
+    SDL_Rect rc;
+    rc.x = x0;
+    rc.y = y0;
+    rc.w = x1 - x0 + 1;
+    rc.h = y1 - y0 + 1;
+    SDL_FillRect(screen, &rc, col);
+}
+
+
+void dmDrawHLine(SDL_Surface *screen, int x0, int x1, int yc, const Uint32 col)
+{
+    const int bpp = screen->format->BytesPerPixel,
+              cx0 = screen->clip_rect.x, cy0 = screen->clip_rect.y,
+              cx1 = screen->clip_rect.x + screen->clip_rect.w - 1,
+              cy1 = screen->clip_rect.y + screen->clip_rect.h - 1;
+
+    DM_SWAP(int, x0, x1);
+    if (yc < cy0|| yc > cy1 || x1 < cx0 || x0 > cx1) return;
+    if (x0 < cx0) x0 = cx0;
+    if (x1 > cx1) x1 = cx1;
+
+    int x = x1 - x0 + 1;
+    Uint8 *pix = ((Uint8 *) screen->pixels) + yc * screen->pitch + (x0 * bpp);
+    switch (screen->format->BitsPerPixel)
+    {
+        case 8:
+            while (x--)
+                *pix++ = col;
+            break;
+
+        case 32:
+            {
+                Uint32 *p = (Uint32 *) pix;
+                while (x--)
+                    *p++ = col;
+            }
+            break;
+    }
+}
+
+
+void dmDrawVLine(SDL_Surface *screen, int y0, int y1, int xc, const Uint32 col)
+{
+    const int bpp = screen->format->BytesPerPixel,
+              pitch = screen->pitch / bpp,
+              cx0 = screen->clip_rect.x, cy0 = screen->clip_rect.y,
+              cx1 = screen->clip_rect.x + screen->clip_rect.w - 1,
+              cy1 = screen->clip_rect.y + screen->clip_rect.h - 1;
+
+    DM_SWAP(int, y0, y1);
+    if (xc < cx0 || xc > cx1 || y1 < cy0 || y0 > cy1) return;
+    if (y0 < cy0) y0 = cy0;
+    if (y1 > cy1) y1 = cy1;
+
+    int y = y1 - y0 + 1;
+    Uint8 *pix = ((Uint8 *) screen->pixels) + y0 * screen->pitch + (xc * bpp);
+    switch (screen->format->BitsPerPixel)
+    {
+        case 8:
+            while (y--)
+            {
+                *pix = col;
+                pix += pitch;
+            }
+            break;
+
+        case 32:
+            {
+                Uint32 *p = (Uint32 *) pix;
+                while (y--)
+                {
+                    *p = col;
+                    p += pitch;
+                }
+            }
+            break;
+    }
+}
+
+
+void dmDrawBox3D(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 ucol, Uint32 dcol)
+{
+    dmDrawHLine(screen, x0    , x1 - 1, y0, ucol);
+    dmDrawHLine(screen, x0 + 1, x1    , y1, dcol);
+
+    dmDrawVLine(screen, y0    , y1 - 1, x0, ucol);
+    dmDrawVLine(screen, y0 + 1, y1    , x1, dcol);
+}
+
+
+void dmFillBox3D(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 bgcol, Uint32 ucol, Uint32 dcol)
+{
+    SDL_Rect rc;
+
+    rc.x = x0 + 1;
+    rc.y = y0 + 1;
+    rc.w = x1 - x0 - 1;
+    rc.h = y1 - y0 - 1;
+    SDL_FillRect(screen, &rc, bgcol);
+
+    dmDrawBox3D(screen, x0, y0, x1, y1, ucol, dcol);
+}
+
+
+void dmDrawBMTextConstQ(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt)
+{
+    const char *ptr = fmt;
+    DMUnscaledBlitFunc blit = NULL;
+
+    while (*ptr)
+    {
+        int ch = toupper(*ptr++);
+        SDL_Surface *glyph;
+
+        if (ch == '_')
+        {
+            xc += 4;
+            continue;
+        }
+
+        if (ch >= 0 && ch < font->nglyphs && (glyph = font->glyphs[ch]) != NULL)
+        {
+            if (blit == NULL)
+                blit = dmGetUnscaledBlitFunc(glyph->format, screen->format, mode);
+
+            blit(glyph, xc, yc, screen);
+            xc += font->width;
+        }
+        else
+            xc += font->width;
+    }
+}
+
+
+void dmDrawBMTextVAQ(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt, va_list ap)
+{
+    char tmp[512];
+    vsnprintf(tmp, sizeof(tmp), fmt, ap);
+    dmDrawBMTextConstQ(screen, font, mode, xc, yc, tmp);
+}
+
+
+void dmDrawBMTextQ(SDL_Surface *screen, DMBitmapFont *font, int mode, int xc, int yc, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    dmDrawBMTextVAQ(screen, font, mode, xc, yc, fmt, ap);
+    va_end(ap);
+}