--- a/tools/ppl.c	Tue Aug 22 02:05:40 2017 +0300
+++ b/tools/ppl.c	Tue Aug 22 13:18:21 2017 +0300
@@ -5,8 +5,8 @@
  *
  * Please read file 'COPYING' for information on license and distribution.
  */
-#include <SDL.h>
 #include "dmlib.h"
+#include "libgutil.h"
 
 #include "jss.h"
 #include "jssmod.h"
@@ -175,161 +175,7 @@
 }
 
 
-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);
-}
-
-
-Uint32 dmCol(float r, float g, float b)
+static inline Uint32 dmCol(const float r, const float g, const float b)
 {
     return dmMapRGB(engine.screen, 255.0f * r, 255.0f * g, 255.0f * b);
 }
@@ -361,6 +207,11 @@
 }
 
 
+//
+// XXX TODO: To display actual continuous sample data for channel,
+// we would need to have separate "FIFO" buffers for each, updating
+// them with new data from incoming channel data.
+//
 void dmDisplayChn(SDL_Surface *screen, int x0, int y0, int x1, int y1, int nchannel, JSSChannel *chn)
 {
     int yh = y1 - y0 - 2;
@@ -473,6 +324,7 @@
     return jmpHexTab[v & 15];
 }
 
+
 void dmPrintNote(SDL_Surface *screen, int xc, int yc, JSSNote *n)
 {
     char text[32];
@@ -657,6 +509,7 @@
         jvmMute(engine.dev, i, mute);
 }
 
+
 int main(int argc, char *argv[])
 {
     BOOL initSDL = FALSE, audioInit = FALSE;