X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Frrd_gfx.c;h=b38f5ad42dbf3b22fd7897e88537a237290e1dba;hb=4c3e7607a2cb3c38bf5681996ffd2083a1c8af06;hp=faa9c916ccacc2a1d4f12cf9b85339d9154da2e3;hpb=104c47f444b8f0747fcd1cba3f0b791410087dcf;p=rrdtool.git

diff --git a/src/rrd_gfx.c b/src/rrd_gfx.c
index faa9c91..b38f5ad 100644
--- a/src/rrd_gfx.c
+++ b/src/rrd_gfx.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * RRDtool 1.2.1  Copyright by Tobi Oetiker, 1997-2005
+ * RRDtool 1.2.6  Copyright by Tobi Oetiker, 1997-2005
  ****************************************************************************
  * rrd_gfx.c  graphics wrapper for rrdtool
   **************************************************************************/
@@ -19,10 +19,14 @@
 
 #include "rrd_gfx.h"
 #include "rrd_afm.h"
+#include "unused.h"
 
 /* lines are better drawn on the pixle than between pixles */
 #define LINEOFFSET 0.5
 
+#define USE_PDF_FAKE_ALPHA 1
+#define USE_EPS_FAKE_ALPHA 1
+
 typedef struct gfx_char_s *gfx_char;
 struct gfx_char_s {
   FT_UInt     index;    /* glyph index */
@@ -288,7 +292,7 @@ double gfx_get_text_width ( gfx_canvas_t *canvas,
 }
 
 double gfx_get_text_width_libart (
-			    gfx_canvas_t *canvas, double start, char* font, double size,
+			    gfx_canvas_t *canvas, double UNUSED(start), char* font, double size,
 			    double tabwidth, char* text, int rotation ){
 
   int           error;
@@ -514,12 +518,12 @@ int           gfx_render_png (gfx_canvas_t *canvas,
     unsigned long pys_height = height * canvas->zoom;
     const int bytes_per_pixel = 4;
     unsigned long rowstride = pys_width*bytes_per_pixel; /* bytes per pixel */
-    art_u8 *buffer = art_new (art_u8, rowstride*pys_height);
+    
     /* fill that buffer with out background color */
-    gfx_color_t *buffp;
-    long i;
-    for (i=0,buffp=(gfx_color_t *)buffer;
-         i<pys_width*pys_height;
+    gfx_color_t *buffp = art_new (gfx_color_t, pys_width*pys_height);
+    art_u8 *buffer = (art_u8 *)buffp;
+    unsigned long i;
+    for (i=0;i<pys_width*pys_height;
 	 i++){
 	*(buffp++)=background;
     }
@@ -528,26 +532,29 @@ int           gfx_render_png (gfx_canvas_t *canvas,
         switch (node->type) {
         case GFX_LINE:
         case GFX_AREA: {   
-            ArtVpath *vec,*pvec;
+            ArtVpath *vec;
             double dst[6];     
-            ArtSVP *svp,*svpt;
+            ArtSVP *svp;
             art_affine_scale(dst,canvas->zoom,canvas->zoom);
             vec = art_vpath_affine_transform(node->path,dst);
 	    if (node->closed_path)
 		gfx_libart_close_path(node, &vec);
 	    /* gfx_round_scaled_coordinates(vec); */
             /* pvec = art_vpath_perturb(vec);
-	    art_free(vec); */
+	       art_free(vec); */
             if(node->type == GFX_LINE){
                 svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
                                              ART_PATH_STROKE_CAP_ROUND,
                                              node->size*canvas->zoom,4,0.25);
             } else {
                 svp  = art_svp_from_vpath ( vec );
-/*                svpt = art_svp_uncross( svp );
-                art_svp_free(svp);
-	        svp  = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO); 
-                art_svp_free(svpt);*/
+		/* this takes time and is unnecessary since we make
+	           sure elsewhere that the areas are going clock-whise */
+		/*  svpt = art_svp_uncross( svp );
+                    art_svp_free(svp);
+	            svp  = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO); 
+                    art_svp_free(svpt);
+                 */
             }
             art_free(vec);
 	    /* this is from gnome since libart does not have this yet */
@@ -795,8 +802,9 @@ static int gfx_save_png (art_u8 *buffer, FILE *fp,  long width, long height, lon
   text[0].compression = PNG_TEXT_COMPRESSION_NONE;
   png_set_text (png_ptr, info_ptr, text, 1);
 
-  /* lets make this fast */
-  /* png_set_filter(png_ptr,0,PNG_FILTER_NONE); */
+  /* lets make this fast while ending up with some increass in image size */
+  png_set_filter(png_ptr,0,PNG_FILTER_NONE);
+  /* png_set_filter(png_ptr,0,PNG_FILTER_SUB); */
   png_set_compression_level(png_ptr,1);
   /* png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY); */
   /* 
@@ -817,13 +825,146 @@ static int gfx_save_png (art_u8 *buffer, FILE *fp,  long width, long height, lon
 }
 
  
+/* ----- COMMON ROUTINES for pdf, svg and eps */
+#define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
+#define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
+
+#define PDF_CALC_DEBUG 0
+
+typedef struct pdf_point
+{
+	double x, y;
+} pdf_point;
+
+typedef struct
+{
+	double ascender, descender, baselineY;
+	pdf_point sizep, minp, maxp;
+	double x, y, tdx, tdy;
+	double r, cos_r, sin_r;
+	double ma, mb, mc, md, mx, my; /* pdf coord matrix */
+	double tmx, tmy; /* last 2 coords of text coord matrix */
+#if PDF_CALC_DEBUG
+	int debug;
+#endif
+} pdf_coords;
+
+#if PDF_CALC_DEBUG
+static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
+{
+	fprintf(stderr, "PDF CALC =============================\n");
+	fprintf(stderr, "   '%s' at %f pt\n", node->text, node->size);
+	fprintf(stderr, "   align h = %s, v = %s,  sizep = %f, %f\n",
+		(node->halign == GFX_H_RIGHT ? "r" :
+			(node->halign == GFX_H_CENTER ? "c" :
+				(node->halign == GFX_H_LEFT ? "l" : "N"))),
+		(node->valign == GFX_V_TOP ? "t" :
+			(node->valign == GFX_V_CENTER ? "c" :
+				(node->valign == GFX_V_BOTTOM ? "b" : "N"))),
+			g->sizep.x, g->sizep.y);
+	fprintf(stderr, "   r = %f = %f, cos = %f, sin = %f\n",
+			g->r, node->angle, g->cos_r, g->sin_r);
+	fprintf(stderr, "   ascender = %f, descender = %f, baselineY = %f\n",
+		g->ascender, g->descender, g->baselineY);
+	fprintf(stderr, "   sizep: %f, %f\n", g->sizep.x, g->sizep.y);
+	fprintf(stderr, "   minp: %f, %f     maxp = %f, %f\n", 
+			g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
+	fprintf(stderr, "   x = %f, y = %f\n", g->x, g->y);
+	fprintf(stderr, "   tdx = %f, tdy = %f\n", g->tdx, g->tdy);
+	fprintf(stderr, "   GM = %f, %f, %f, %f, %f, %f\n",
+			g->ma, g->mb, g->mc, g->md, g->mx, g->my);
+	fprintf(stderr, "   TM = %f, %f, %f, %f, %f, %f\n",
+			g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
+}
+#endif
+ 
+#if PDF_CALC_DEBUG
+#define PDF_DD(x) if (g->debug) x;
+#else
+#define PDF_DD(x)
+#endif
+
+static void pdf_rotate(pdf_coords *g, pdf_point *p)
+{
+    double x2 = g->cos_r * p->x - g->sin_r * p->y;
+    double y2 = g->sin_r * p->x + g->cos_r * p->y;
+	PDF_DD( fprintf(stderr, "  rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
+    p->x = x2;
+	p->y = y2;
+}
+
+
+static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
+{
+	pdf_point a, b, c;
+#if PDF_CALC_DEBUG
+	/* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
+	g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
+#endif
+	g->x = node->x;
+	g->y = page_height - node->y;
+	if (node->angle) {
+		g->r = 2 * M_PI * node->angle / 360.0;
+		g->cos_r = cos(g->r);
+		g->sin_r = sin(g->r);
+	} else {
+		g->r = 0;
+		g->cos_r = 1;
+		g->sin_r = 0;
+	}
+	g->ascender = afm_get_ascender(node->filename, node->size);
+	g->descender = afm_get_descender(node->filename, node->size);
+	g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
+	/* seems like libart ignores the descender when doing vertial-align = bottom,
+	   so we do that too, to get labels v-aligning properly */
+	g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
+	g->baselineY = -g->ascender - g->sizep.y / 2;
+	a.x = g->sizep.x; a.y = g->sizep.y;
+	b.x = g->sizep.x; b.y = 0;
+	c.x = 0; c.y = g->sizep.y;
+	if (node->angle) {
+		pdf_rotate(g, &a);
+		pdf_rotate(g, &b);
+		pdf_rotate(g, &c);
+	}
+	g->minp.x = min3(a.x, b.x, c.x);
+	g->minp.y = min3(a.y, b.y, c.y);
+	g->maxp.x = max3(a.x, b.x, c.x);
+	g->maxp.y = max3(a.y, b.y, c.y);
+  /* The alignment parameters in node->valign and node->halign
+     specifies the alignment in the non-rotated coordinate system
+     (very unlike pdf/postscript), which complicates matters.
+  */
+	switch (node->halign) {
+	case GFX_H_RIGHT:  g->tdx = -g->maxp.x; break;
+	case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
+	case GFX_H_LEFT:   g->tdx = -g->minp.x; break;
+	case GFX_H_NULL:   g->tdx = 0; break;
+	}
+	switch(node->valign){
+	case GFX_V_TOP:    g->tdy = -g->maxp.y; break;
+	case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
+	case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
+	case GFX_V_NULL:   g->tdy = 0; break;          
+	}
+	g->ma = g->cos_r;
+	g->mb = g->sin_r;
+	g->mc = -g->sin_r;
+	g->md = g->cos_r;
+	g->mx = g->x + g->tdx;
+	g->my = g->y + g->tdy;
+	g->tmx = g->mx - g->ascender * g->mc;
+	g->tmy = g->my - g->ascender * g->md;
+	PDF_DD(pdf_dump_calc(node, g))
+}
+
 /* ------- SVG -------
    SVG reference:
    http://www.w3.org/TR/SVG/
 */
 static int svg_indent = 0;
 static int svg_single_line = 0;
-static const char *svg_default_font = "Helvetica";
+static const char *svg_default_font = "-dummy-";
 typedef struct svg_dash
 {
   int dash_enable;
@@ -971,7 +1112,7 @@ static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
    }
   fputs("\"", fp);
   if (opacity != 0xFF) {
-    fprintf(fp, " stroke-opacity=\"");
+    fprintf(fp, " opacity=\"");
     svg_write_number(fp, opacity / 255.0);
     fputs("\"", fp);
  }
@@ -1200,47 +1341,37 @@ static void svg_area(FILE *fp, gfx_node_t *node)
  
 static void svg_text(FILE *fp, gfx_node_t *node)
 {
-   double x = node->x - LINEOFFSET;
-   double y = node->y - LINEOFFSET;
+   pdf_coords g;
+   const char *fontname;
+   /* as svg has 0,0 in top-left corner (like most screens) instead of
+	  bottom-left corner like pdf and eps, we have to fake the coords
+	  using offset and inverse sin(r) value */
+   int page_height = 1000;
+   pdf_calc(page_height, node, &g);
    if (node->angle != 0) {
      svg_start_tag(fp, "g");
-     fputs(" transform=\"translate(", fp);
-     svg_write_number(fp, x);
-     fputs(",", fp);
-     svg_write_number(fp, y);
-     fputs(") rotate(", fp);
-     svg_write_number(fp, -node->angle);
-     fputs(")\"", fp);
-     x = y = 0;
+	 /* can't use svg_write_number as 2 decimals is far from enough to avoid
+		skewed text */
+     fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
+			 g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
      svg_close_tag(fp);
    }
-   switch (node->valign) {
-   case GFX_V_TOP:  y += node->size; break;
-   case GFX_V_CENTER: y += node->size / 3; break;
-   case GFX_V_BOTTOM: break;
-   case GFX_V_NULL: break;
-   }
    svg_start_tag(fp, "text");
-   fputs(" x=\"", fp);
-   svg_write_number(fp, x);
-   fputs("\" y=\"", fp);
-   svg_write_number(fp, y);
-
-/*  if (strcmp(node->filename, svg_default_font))
-    fprintf(fp, " font-family=\"%s\"", node->filename);
-    */
-   fputs("\" font-family=\"Helvetica", fp);
-   fputs("\" font-size=\"", fp);
+   if (!node->angle) {
+     fputs(" x=\"", fp);
+     svg_write_number(fp, g.tmx);
+     fputs("\" y=\"", fp);
+     svg_write_number(fp, page_height - g.tmy);
+     fputs("\"", fp);
+   }
+   fontname = afm_get_font_name(node->filename);
+   if (strcmp(fontname, svg_default_font))
+     fprintf(fp, " font-family=\"%s\"", fontname);
+   fputs(" font-size=\"", fp);
    svg_write_number(fp, node->size);
    fputs("\"", fp);
   if (!svg_color_is_black(node->color))
     svg_write_color(fp, node->color, "fill");
-   switch (node->halign) {
-   case GFX_H_RIGHT:  fputs(" text-anchor=\"end\"", fp); break;
-   case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
-   case GFX_H_LEFT: break;
-   case GFX_H_NULL: break;
-   }
    svg_close_tag_single_line(fp);
    /* support for node->tabwidth missing */
    svg_write_text(fp, node->text);
@@ -1253,13 +1384,22 @@ int       gfx_render_svg (gfx_canvas_t *canvas,
                  art_u32 width, art_u32 height,
                  gfx_color_t background, FILE *fp){
    gfx_node_t *node = canvas->firstnode;
+   /* Find the first font used, and assume it is the mostly used
+	  one. It reduces the number of font-familty attributes. */
+   while (node) {
+	   if (node->type == GFX_TEXT && node->filename) {
+		   svg_default_font = afm_get_font_name(node->filename);
+		   break;
+	   }
+	   node = node->next;
+   }
    fputs(
 "<?xml version=\"1.0\" standalone=\"no\"?>\n"
 "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
 "   \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
 "<!--\n"
-"   SVG file created by RRDtool,\n"
-"   Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
+"   SVG file created by\n"
+"        RRDtool 1.2.6 Tobias Oetiker, http://tobi.oetiker.ch\n"
 "\n"
 "   The width/height attributes in the outhermost svg node\n"
 "   are just default sizes for the browser which is used\n"
@@ -1288,6 +1428,7 @@ int       gfx_render_svg (gfx_canvas_t *canvas,
    fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
   svg_write_color(fp, background, "fill");
    svg_close_tag_empty_node(fp);
+   node = canvas->firstnode;
    while (node) {
      switch (node->type) {
      case GFX_LINE:
@@ -1334,13 +1475,26 @@ typedef struct eps_state
 
 static void eps_set_color(eps_state *state, gfx_color_t color)
 {
+#if USE_EPS_FAKE_ALPHA
+   double a1, a2;
+#endif
+   /* gfx_color_t is RRGGBBAA */
+  if (state->color == color)
+    return;
+#if USE_EPS_FAKE_ALPHA
+  a1 = (color & 255) / 255.0;
+  a2 = 255 * (1 - a1);
+#define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
+#else
+#define eps_color_calc(x) (int)( (x) & 255)
+#endif
    /* gfx_color_t is RRGGBBAA */
   if (state->color == color)
     return;
   fprintf(state->fp, "%d %d %d Rgb\n",
-      (int)((color >> 24) & 255),
-      (int)((color >> 16) & 255),
-      (int)((color >>  8) & 255));
+      eps_color_calc(color >> 24),
+      eps_color_calc(color >> 16),
+      eps_color_calc(color >>  8));
   state->color = color;
 }
 
@@ -1413,7 +1567,7 @@ static int eps_prologue(eps_state *state)
   gfx_node_t *node;
   fputs(
     "%!PS-Adobe-3.0 EPSF-3.0\n"
-    "%%Creator: RRDtool 1.2.1 Tobias Oetiker, http://tobi.oetiker.ch\n"
+    "%%Creator: RRDtool 1.2.6 Tobias Oetiker, http://tobi.oetiker.ch\n"
     /* can't like weird chars here */
     "%%Title: (RRDtool output)\n"
     "%%DocumentData: Clean7Bit\n"
@@ -1443,12 +1597,9 @@ static int eps_prologue(eps_state *state)
       "/CP {closepath} bd\n"
       "/WS {setlinewidth stroke} bd\n"
       "/F {fill} bd\n"
-      "/TaL { } bd\n"
-      "/TaC {dup stringwidth pop neg 2 div 0 rmoveto } bd\n"
-      "/TaR {dup stringwidth pop neg 0 rmoveto } bd\n"
-      "/TL {moveto TaL show} bd\n"
-      "/TC {moveto TaC show} bd\n"
-      "/TR {moveto TaR show} bd\n"
+      "/T1 {gsave} bd\n"
+      "/T2 {concat 0 0 moveto show grestore} bd\n"
+      "/T   {moveto show} bd\n"
       "/Rgb { 255.0 div 3 1 roll\n"
       "       255.0 div 3 1 roll \n"
       "       255.0 div 3 1 roll setrgbcolor } bd\n"
@@ -1545,12 +1696,11 @@ static void eps_write_linearea(eps_state *state, gfx_node_t *node)
 static void eps_write_text(eps_state *state, gfx_node_t *node)
 {
   FILE *fp = state->fp;
-  const unsigned char *p;
+  const char *p;
   const char *ps_font = afm_get_font_postscript_name(node->filename);
-  char align = 'L';
-  double x = node->x;
-  double y = state->page_height - node->y, ydelta = 0;
   int lineLen = 0;
+  pdf_coords g;
+  pdf_calc(state->page_height, node, &g);
   eps_set_color(state, node->color);
   if (strcmp(ps_font, state->font) || node->size != state->font_size) {
     state->font = ps_font;
@@ -1558,66 +1708,57 @@ static void eps_write_text(eps_state *state, gfx_node_t *node)
     svg_write_number(fp, state->font_size);
     fprintf(fp, " SetFont-%s\n", state->font);
   }
+  if (node->angle)
+	  fputs("T1 ", fp);
   fputs("(", fp);
   lineLen = 20;
-  for (p = (const unsigned char*)node->text; *p; p++) {
-    if (lineLen > 70) {
+  p = node->text;
+  while (1) {
+    unsigned char ch = *(unsigned char*)p;
+    if (!ch)
+      break;
+    if (++lineLen > 70) {
       fputs("\\\n", fp); /* backslash and \n */
       lineLen = 0;
     }
-    switch (*p) {
+    switch (ch) {
+      case '%':
       case '(':
       case ')':
       case '\\':
+        fputc('\\', fp);
+        fputc(ch, fp);
+        break;
       case '\n':
+        fputs("\\n", fp);
+        break;
       case '\r':
+        fputs("\\r", fp);
+        break;
       case '\t':
-        fputc('\\', fp);
-        lineLen++;
-        /* fall-through */
+        fputs("\\t", fp);
+        break;
       default:
-        if (*p >= 126)
-          fprintf(fp, "\\%03o", *p);
-        else
-          fputc(*p, fp);
-        lineLen++;
-    }
-  }
-  fputs(") ", fp);
-  switch(node->valign){
-  case GFX_V_TOP:    ydelta = -node->size; break;
-  case GFX_V_CENTER: ydelta = -node->size / 3.0; break;          
-  case GFX_V_BOTTOM: break;          
-  case GFX_V_NULL: break;          
-  }
-  if (node->angle == 0)
-    y += ydelta;
-  switch (node->halign) {
-  case GFX_H_RIGHT:  align = 'R'; break;
-  case GFX_H_CENTER: align = 'C'; break;
-  case GFX_H_LEFT: align= 'L'; break;
-  case GFX_H_NULL: align= 'L'; break;
+        if (ch >= 126 || ch < 32) {
+          fprintf(fp, "\\%03o", ch);
+          lineLen += 3;
+        } else {
+          fputc(ch, fp);
+        }
+      }
+      p++;
   }
-  if (node->angle != 0) {
-    fputs("\n", fp);
-    fputs("  gsave ", fp);
-    svg_write_number(fp, x);
-    fputc(' ', fp);
-    svg_write_number(fp, y);
-    fputs(" translate ", fp);
-    svg_write_number(fp, node->angle);
-    fputs(" rotate 0 ", fp);
-    svg_write_number(fp, ydelta);
-    fputs(" moveto ", fp);
-    fprintf(fp, "Ta%c", align);
-    fputs(" show grestore\n", fp);
+  if (node->angle) {
+	 /* can't use svg_write_number as 2 decimals is far from enough to avoid
+		skewed text */
+	  fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
+			  g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
   } else {
-    svg_write_number(fp, x);
-    fputc(' ', fp);
-    svg_write_number(fp, y);
-    fputs(" T", fp);
-    fputc(align, fp);
-    fputc('\n', fp);
+	  fputs(") ", fp);
+	  svg_write_number(fp, g.tmx);
+	  fputs(" ", fp);
+	  svg_write_number(fp, g.tmy);
+	  fputs(" T\n", fp);
   }
 }
 
@@ -1673,7 +1814,7 @@ int       gfx_render_eps (gfx_canvas_t *canvas,
 
 /* ------- PDF -------
    PDF references page:
-   http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
+   http://partners.adobe.com/public/developer/pdf/index_reference.html
 */
 
 typedef struct pdf_buffer
@@ -1711,7 +1852,7 @@ typedef struct pdf_state
   int last_obj_id;
   /*--*/
   pdf_buffer pdf_header;
-  pdf_buffer catalog_obj, pages_obj, page1_obj;
+  pdf_buffer info_obj, catalog_obj, pages_obj, page1_obj;
   pdf_buffer fontsdict_obj;
   pdf_buffer graph_stream;
 } pdf_state;
@@ -1795,6 +1936,41 @@ static void pdf_putnumber(pdf_buffer *buf, double d)
   pdf_puts(buf, tmp);
 }
 
+static void pdf_put_string_contents(pdf_buffer *buf, const char *text)
+{
+    const char *p = text;
+    while (1) {
+	unsigned char ch = *(unsigned char*)p;
+	switch (ch) {
+	    case 0: return;
+	    case '(':
+	    case ')':
+	    case '\\':
+		pdf_puts(buf, "\\");
+		pdf_put(buf, p, 1);
+		break;
+	    case '\n':
+		pdf_puts(buf, "\\n");
+		break;
+	    case '\r':
+		pdf_puts(buf, "\\r");
+		break;
+	    case '\t':
+		pdf_puts(buf, "\\t");
+		break;
+	    default:
+		if (ch >= 126 || ch < 32) {
+		    char tmp[10];
+		    snprintf(tmp, sizeof(tmp), "\\%03o", ch);
+		    pdf_puts(buf, tmp);
+		} else {
+		    pdf_put(buf, p, 1);
+		}
+	}
+	p++;
+    }
+}
+
 static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
 {
   pdf_init_buffer(state, buf);
@@ -1812,14 +1988,24 @@ static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
 static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
 	gfx_color_t *current_color, const char *op)
 {
+#if USE_PDF_FAKE_ALPHA
+   double a1, a2;
+#endif
    /* gfx_color_t is RRGGBBAA */
   if (*current_color == color)
     return;
-  pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
+#if USE_PDF_FAKE_ALPHA
+  a1 = (color & 255) / 255.0;
+  a2 = 1 - a1;
+#define pdf_color_calc(x) ( ((x)  & 255) / 255.0 * a1 + a2)
+#else
+#define pdf_color_calc(x) ( ((x)  & 255) / 255.0)
+#endif
+  pdf_putnumber(buf, pdf_color_calc(color >> 24));
   pdf_puts(buf, " ");
-  pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
+  pdf_putnumber(buf, pdf_color_calc(color >> 16));
   pdf_puts(buf, " ");
-  pdf_putnumber(buf, ((color >>  8) & 255) / 255.0);
+  pdf_putnumber(buf, pdf_color_calc(color >>  8));
   pdf_puts(buf, " ");
   pdf_puts(buf, op);
   pdf_puts(buf, "\n");
@@ -1963,53 +2149,55 @@ static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
    }
 }
 
+
+static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
+{
+	char tmp[150];
+	pdf_buffer *s = &state->graph_stream;
+	if (node->angle == 0) {
+		pdf_puts(s, "1 0 0 1 ");
+		pdf_putnumber(s, useTM ? g->tmx : g->mx);
+		pdf_puts(s, " ");
+		pdf_putnumber(s, useTM ? g->tmy : g->my);
+	} else {
+		 /* can't use svg_write_number as 2 decimals is far from enough to avoid
+			skewed text */
+		sprintf(tmp, "%f %f %f %f %f %f",
+				g->ma, g->mb, g->mc, g->md, 
+				useTM ? g->tmx : g->mx,
+				useTM ? g->tmy : g->my);
+		pdf_puts(s, tmp);
+	}
+}
+
 static void pdf_write_text(pdf_state *state, gfx_node_t *node, 
     int last_was_text, int next_is_text)
 {
-  char tmp[30];
+  pdf_coords g;
   pdf_buffer *s = &state->graph_stream;
-  const unsigned char *p;
   pdf_font *font = pdf_find_font(state, node);
-  double x = node->x;
-  double y = state->page_height - node->y;
-  double dx = 0, dy = 0;
-  double cos_a = 0, sin_a = 0;
   if (font == NULL) {
     rrd_set_error("font disappeared");
     state->has_failed = 1;
     return;
   }
-  switch(node->valign){
-  case GFX_V_TOP:    dy = -node->size; break;
-  case GFX_V_CENTER: dy = -node->size / 3.0; break;          
-  case GFX_V_BOTTOM: break;          
-  case GFX_V_NULL: break;          
-  }
-  switch (node->halign) {
-  case GFX_H_RIGHT:  dx = -afm_get_text_width(0, font->ps_font, 
-			 node->size, node->tabwidth, node->text);
-		     break;
-  case GFX_H_CENTER: dx = -afm_get_text_width(0, font->ps_font, 
-			 node->size, node->tabwidth, node->text) / 2;
-		     break;
-  case GFX_H_LEFT: break;
-  case GFX_H_NULL: break;
-  }
+  pdf_calc(state->page_height, node, &g);
+#if PDF_CALC_DEBUG
+  pdf_puts(s, "q % debug green box\n");
+  pdf_write_matrix(state, node, &g, 0);
+  pdf_puts(s, " cm\n");
+  pdf_set_fill_color(s, 0x90FF9000);
+  pdf_puts(s, "0 0.4 0 rg\n");
+  pdf_puts(s, "0 0 ");
+  pdf_putnumber(s, g.sizep.x);
+  pdf_puts(s, " ");
+  pdf_putnumber(s, g.sizep.y);
+  pdf_puts(s, " re\n");
+  pdf_puts(s, "f\n");
+  pdf_puts(s, "Q\n");
+#endif
   pdf_set_fill_color(s, node->color);
-  if (node->angle != 0) {
-    double a = 2 * M_PI * node->angle / 360.0;
-    double new_x, new_y;
-    cos_a = cos(a);
-    sin_a = sin(a);
-    new_x = cos_a * dx - sin_a * dy + x;
-    new_y = sin_a * dx + cos_a * dy + y;
-    x = new_x;
-    y = new_y;
-  } else {
-    x += dx;
-    y += dy;
-  }
-  if (!last_was_text)
+  if (PDF_CALC_DEBUG || !last_was_text)
     pdf_puts(s, "BT\n");
   if (state->font_id != font->obj.id || node->size != state->font_size) {
     state->font_id = font->obj.id;
@@ -2020,44 +2208,12 @@ static void pdf_write_text(pdf_state *state, gfx_node_t *node,
     pdf_putnumber(s, node->size);
     pdf_puts(s, " Tf\n");
   }
-  if (node->angle == 0) {
-    pdf_puts(s, "1 0 0 1 ");
-  } else {
-    pdf_putnumber(s, cos_a);
-    pdf_puts(s, " ");
-    pdf_putnumber(s, sin_a);
-    pdf_puts(s, " ");
-    pdf_putnumber(s, -sin_a);
-    pdf_puts(s, " ");
-    pdf_putnumber(s, cos_a);
-    pdf_puts(s, " ");
-  }
-  pdf_putnumber(s, x);
-  pdf_puts(s, " ");
-  pdf_putnumber(s, y);
+  pdf_write_matrix(state, node, &g, 1);
   pdf_puts(s, " Tm\n");
   pdf_puts(s, "(");
-  for (p = (const unsigned char*)node->text; *p; p++) {
-    switch (*p) {
-      case '(':
-      case ')':
-      case '\\':
-      case '\n':
-      case '\r':
-      case '\t':
-        pdf_puts(s, "\\");
-        /* fall-through */
-      default:
-        if (*p >= 126) {
-          snprintf(tmp, sizeof(tmp), "\\%03o", *p);
-	  pdf_puts(s, tmp);
-	} else {
-          pdf_put(s, (const char*)p, 1);
-	}
-    }
-  }
+  pdf_put_string_contents(s, node->text);
   pdf_puts(s, ") Tj\n");
-  if (!next_is_text)
+  if (PDF_CALC_DEBUG || !next_is_text)
     pdf_puts(s, "ET\n");
 }
  
@@ -2084,6 +2240,7 @@ static void pdf_init_document(pdf_state *state)
 {
   pdf_init_buffer(state, &state->pdf_header);
   pdf_init_dict(state, &state->catalog_obj);
+  pdf_init_dict(state, &state->info_obj);
   pdf_init_dict(state, &state->pages_obj);
   pdf_init_dict(state, &state->page1_obj);
   pdf_init_dict(state, &state->fontsdict_obj);
@@ -2097,12 +2254,17 @@ static void pdf_init_document(pdf_state *state)
 
 static void pdf_setup_document(pdf_state *state)
 {
+  const char *creator = "RRDtool 1.2.6 Tobias Oetiker, http://tobi.oetiker.ch";
   /* all objects created by now, so init code can reference them */
   /* HEADER */
   pdf_puts(&state->pdf_header, "%PDF-1.3\n");
   /* following 8 bit comment is recommended by Adobe for
      indicating binary file to file transfer applications */
   pdf_puts(&state->pdf_header, "%\xE2\xE3\xCF\xD3\n");
+  /* INFO */
+  pdf_putsi(&state->info_obj, "/Creator (");
+  pdf_put_string_contents(&state->info_obj, creator);
+  pdf_puts(&state->info_obj, ")\n");
   /* CATALOG */
   pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
   pdf_putsi(&state->catalog_obj, "/Pages ");
@@ -2187,6 +2349,7 @@ static void pdf_write_to_file(pdf_state *state)
   fprintf(state->fp, "<<\n");
   fprintf(state->fp, "\t/Size %d\n", state->last_obj_id + 1);
   fprintf(state->fp, "\t/Root %d 0 R\n", state->catalog_obj.id);
+  fprintf(state->fp, "\t/Info %d 0 R\n", state->info_obj.id);
   fprintf(state->fp, ">>\n");
   fprintf(state->fp, "startxref\n");
   fprintf(state->fp, "%d\n", xref_pos);
@@ -2211,7 +2374,7 @@ static void pdf_free_resources(pdf_state *state)
 
 int       gfx_render_pdf (gfx_canvas_t *canvas,
                  art_u32 width, art_u32 height,
-                 gfx_color_t background, FILE *fp){
+                 gfx_color_t UNUSED(background), FILE *fp){
   struct pdf_state state;
   memset(&state, 0, sizeof(pdf_state));
   state.fp = fp;