/****************************************************************************
- * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
+ * RRDtool 1.2rc6 Copyright by Tobi Oetiker, 1997-2005
****************************************************************************
* rrd_gfx.c graphics wrapper for rrdtool
**************************************************************************/
#else
# define DPRINT(x)
#endif
-
+#include "rrd_tool.h"
#include <png.h>
#include <ft2build.h>
#include FT_FREETYPE_H
-#include <math.h>
+#include FT_GLYPH_H
#include "rrd_gfx.h"
+#include "rrd_afm.h"
/* lines are better drawn on the pixle than between pixles */
#define LINEOFFSET 0.5
+typedef struct gfx_char_s *gfx_char;
+struct gfx_char_s {
+ FT_UInt index; /* glyph index */
+ FT_Vector pos; /* location from baseline in 26.6 */
+ FT_Glyph image; /* glyph bitmap */
+};
+
+typedef struct gfx_string_s *gfx_string;
+struct gfx_string_s {
+ unsigned int width;
+ unsigned int height;
+ size_t count; /* number of characters */
+ gfx_char glyphs;
+ size_t num_glyphs;
+ FT_BBox bbox;
+ FT_Matrix transform;
+};
+
+/* compute string bbox */
+static void compute_string_bbox(gfx_string string);
+
+/* create a freetype glyph string */
+gfx_string gfx_string_create ( FT_Face face,
+ const char *text, int rotation, double tabwidth);
+
+/* create a freetype glyph string */
+static void gfx_string_destroy ( gfx_string string );
+
static
gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
gfx_node_t *node = art_new(gfx_node_t,1);
node->path = NULL; /* path */
node->points = 0;
node->points_max =0;
- node->svp = NULL; /* svp */
+ node->closed_path = 0;
node->filename = NULL; /* font or image filename */
node->text = NULL;
node->x = 0.0;
node->y = 0.0; /* position */
+ node->angle = 0;
node->halign = GFX_H_NULL; /* text alignement */
node->valign = GFX_V_NULL; /* text alignement */
node->tabwidth = 0.0;
gfx_canvas_t *canvas = art_new(gfx_canvas_t,1);
canvas->firstnode = NULL;
canvas->lastnode = NULL;
+ canvas->imgformat = IF_PNG; /* we default to PNG output */
+ canvas->interlaced = 0;
+ canvas->zoom = 1.0;
return canvas;
}
/* create a new line */
gfx_node_t *gfx_new_line(gfx_canvas_t *canvas,
- double x0, double y0,
- double x1, double y1,
+ double X0, double Y0,
+ double X1, double Y1,
double width, gfx_color_t color){
+ return gfx_new_dashed_line(canvas, X0, Y0, X1, Y1, width, color, 0, 0);
+}
+
+gfx_node_t *gfx_new_dashed_line(gfx_canvas_t *canvas,
+ double X0, double Y0,
+ double X1, double Y1,
+ double width, gfx_color_t color,
+ double dash_on, double dash_off){
gfx_node_t *node;
ArtVpath *vec;
if (node == NULL) return NULL;
vec = art_new(ArtVpath, 3);
if (vec == NULL) return NULL;
- vec[0].code = ART_MOVETO_OPEN; vec[0].x=x0+LINEOFFSET; vec[0].y=y0+LINEOFFSET;
- vec[1].code = ART_LINETO; vec[1].x=x1+LINEOFFSET; vec[1].y=y1+LINEOFFSET;
- vec[2].code = ART_END;
+ vec[0].code = ART_MOVETO_OPEN; vec[0].x=X0+LINEOFFSET; vec[0].y=Y0+LINEOFFSET;
+ vec[1].code = ART_LINETO; vec[1].x=X1+LINEOFFSET; vec[1].y=Y1+LINEOFFSET;
+ vec[2].code = ART_END; vec[2].x=0;vec[2].y=0;
node->points = 3;
node->points_max = 3;
node->color = color;
node->size = width;
+ node->dash_on = dash_on;
+ node->dash_off = dash_off;
node->path = vec;
return node;
}
/* create a new area */
gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
- double x0, double y0,
- double x1, double y1,
- double x2, double y2,
+ double X0, double Y0,
+ double X1, double Y1,
+ double X2, double Y2,
gfx_color_t color) {
gfx_node_t *node;
if (node == NULL) return NULL;
vec = art_new(ArtVpath, 5);
if (vec == NULL) return NULL;
- vec[0].code = ART_MOVETO; vec[0].x=x0; vec[0].y=y0;
- vec[1].code = ART_LINETO; vec[1].x=x1; vec[1].y=y1;
- vec[2].code = ART_LINETO; vec[2].x=x2; vec[2].y=y2;
- vec[3].code = ART_LINETO; vec[3].x=x0; vec[3].y=y0;
- vec[4].code = ART_END;
+ vec[0].code = ART_MOVETO; vec[0].x=X0; vec[0].y=Y0;
+ vec[1].code = ART_LINETO; vec[1].x=X1; vec[1].y=Y1;
+ vec[2].code = ART_LINETO; vec[2].x=X2; vec[2].y=Y2;
+ vec[3].code = ART_LINETO; vec[3].x=X0; vec[3].y=Y0;
+ vec[4].code = ART_END; vec[4].x=0; vec[4].y=0;
node->points = 5;
node->points_max = 5;
double x, double y){
if (node == NULL) return 1;
if (node->type == GFX_AREA) {
- double x0 = node->path[0].x;
- double y0 = node->path[0].y;
+ double X0 = node->path[0].x;
+ double Y0 = node->path[0].y;
node->points -= 2;
art_vpath_add_point (&(node->path),
&(node->points),
&(node->points),
&(node->points_max),
ART_LINETO,
- x0,y0);
+ X0,Y0);
art_vpath_add_point (&(node->path),
&(node->points),
&(node->points_max),
return 0;
}
-
+void gfx_close_path (gfx_node_t *node) {
+ node->closed_path = 1;
+ if (node->path[0].code == ART_MOVETO_OPEN)
+ node->path[0].code = ART_MOVETO;
+}
/* create a text node */
gfx_node_t *gfx_new_text (gfx_canvas_t *canvas,
enum gfx_v_align_en v_align,
char* text){
gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
- if (angle != 0.0){
- /* currently we only support 0 and 270 */
- angle = 270.0;
- }
node->text = strdup(text);
node->size = size;
node->filename = strdup(font);
node->x = x;
node->y = y;
+ node->angle = angle;
node->color = color;
node->tabwidth = tabwidth;
node->halign = h_align;
node->valign = v_align;
+#if 0
+ /* debugging: show text anchor
+ green is along x-axis, red is downward y-axis */
+ if (1) {
+ double a = 2 * M_PI * -node->angle / 360.0;
+ double cos_a = cos(a);
+ double sin_a = sin(a);
+ double len = 3;
+ gfx_new_line(canvas,
+ x, y,
+ x + len * cos_a, y - len * sin_a,
+ 0.2, 0x00FF0000);
+ gfx_new_line(canvas,
+ x, y,
+ x + len * sin_a, y + len * cos_a,
+ 0.2, 0xFF000000);
+ }
+#endif
return node;
}
-double gfx_get_text_width ( double start, char* font, double size,
- double tabwidth, char* text){
+int gfx_render(gfx_canvas_t *canvas,
+ art_u32 width, art_u32 height,
+ gfx_color_t background, FILE *fp){
+ switch (canvas->imgformat) {
+ case IF_PNG:
+ return gfx_render_png (canvas, width, height, background, fp);
+ case IF_SVG:
+ return gfx_render_svg (canvas, width, height, background, fp);
+ case IF_EPS:
+ return gfx_render_eps (canvas, width, height, background, fp);
+ case IF_PDF:
+ return gfx_render_pdf (canvas, width, height, background, fp);
+ default:
+ return -1;
+ }
+}
+
+static void gfx_string_destroy ( gfx_string string ) {
+ unsigned int n;
+ if (string->glyphs) {
+ for (n=0; n<string->num_glyphs; ++n)
+ FT_Done_Glyph (string->glyphs[n].image);
+ free (string->glyphs);
+ }
+ free (string);
+}
+
+
+double gfx_get_text_width ( gfx_canvas_t *canvas,
+ double start, char* font, double size,
+ double tabwidth, char* text, int rotation){
+ switch (canvas->imgformat) {
+ case IF_PNG:
+ return gfx_get_text_width_libart (start, font, size, tabwidth, text, rotation);
+ case IF_SVG: /* fall through */
+ case IF_EPS:
+ case IF_PDF:
+ return afm_get_text_width(start, font, size, tabwidth, text);
+ default:
+ return size * strlen(text);
+ }
+}
+
+double gfx_get_text_width_libart (
+ double start, char* font, double size,
+ double tabwidth, char* text, int rotation){
- FT_GlyphSlot slot;
- FT_UInt previous=0;
- FT_UInt glyph_index=0;
- FT_Bool use_kerning;
int error;
+ double text_width=0;
FT_Face face;
FT_Library library=NULL;
- double text_width=0;
+ gfx_string string;
+
FT_Init_FreeType( &library );
error = FT_New_Face( library, font, 0, &face );
if ( error ) return -1;
error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
if ( error ) return -1;
+ string = gfx_string_create( face, text, rotation,tabwidth);
+ text_width = string->width;
+ gfx_string_destroy(string);
+ FT_Done_FreeType(library);
+ return text_width/64;
+}
+
+static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
+{
+ /* libart must have end==start for closed paths,
+ even if using ART_MOVETO and not ART_MOVETO_OPEN
+ so add extra point which is the same as the starting point */
+ int points_max = node->points; /* scaled array has exact size */
+ int points = node->points - 1;
+ art_vpath_add_point (vec, &points, &points_max, ART_LINETO,
+ (**vec).x, (**vec).y);
+ art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
+}
+
+
+/* find bbox of a string */
+static void compute_string_bbox(gfx_string string) {
+ unsigned int n;
+ FT_BBox bbox;
+
+ bbox.xMin = bbox.yMin = 32000;
+ bbox.xMax = bbox.yMax = -32000;
+ for ( n = 0; n < string->num_glyphs; n++ ) {
+ FT_BBox glyph_bbox;
+ FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
+ &glyph_bbox );
+ if (glyph_bbox.xMin < bbox.xMin) {
+ bbox.xMin = glyph_bbox.xMin;
+ }
+ if (glyph_bbox.yMin < bbox.yMin) {
+ bbox.yMin = glyph_bbox.yMin;
+ }
+ if (glyph_bbox.xMax > bbox.xMax) {
+ bbox.xMax = glyph_bbox.xMax;
+ }
+ if (glyph_bbox.yMax > bbox.yMax) {
+ bbox.yMax = glyph_bbox.yMax;
+ }
+ }
+ if ( bbox.xMin > bbox.xMax ) {
+ bbox.xMin = 0;
+ bbox.yMin = 0;
+ bbox.xMax = 0;
+ bbox.yMax = 0;
+ }
+ string->bbox.xMin = bbox.xMin;
+ string->bbox.xMax = bbox.xMax;
+ string->bbox.yMin = bbox.yMin;
+ string->bbox.yMax = bbox.yMax;
+}
+
+/* create a free type glyph string */
+gfx_string gfx_string_create(FT_Face face,const char *text,
+ int rotation, double tabwidth)
+{
+
+ FT_GlyphSlot slot = face->glyph; /* a small shortcut */
+ FT_Bool use_kerning;
+ FT_UInt previous;
+ FT_Vector ft_pen;
+
+ gfx_string string;
+ gfx_char glyph; /* current glyph in table */
+ unsigned int n;
+ int error;
+ int gottab = 0;
+
+ ft_pen.x = 0; /* start at (0,0) !! */
+ ft_pen.y = 0;
+
+ string = (gfx_string) malloc (sizeof(struct gfx_string_s));
+ string->width = 0;
+ string->height = 0;
+ string->count = strlen (text);
+ string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
+ string->num_glyphs = 0;
+ string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
+ string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
+ string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
+ string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
+
use_kerning = FT_HAS_KERNING(face);
- slot = face->glyph;
- for(;*text;text++) {
- previous = glyph_index;
- glyph_index = FT_Get_Char_Index( face, *text);
-
- if (use_kerning && previous && glyph_index){
- FT_Vector delta;
- FT_Get_Kerning( face, previous, glyph_index,
- 0, &delta );
- text_width += (double)delta.x / 64.0;
-
+ previous = 0;
+ glyph = string->glyphs;
+ for (n=0; n<string->count; n++, glyph++) {
+ FT_Vector vec;
+ /* handle the tabs ...
+ have a witespace glyph inserted, but set its width such that the distance
+ of the new right edge is x times tabwidth from 0,0 where x is an integer. */
+ char letter = text[n];
+ gottab = 0;
+ if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
+ /* we have a tab here so skip the backslash and
+ set t to ' ' so that we get a white space */
+ gottab = 1;
+ n++;
+ letter = ' ';
+ }
+ if (letter == '\t'){
+ letter = ' ';
+ gottab = 1 ;
+ }
+ /* initialize each struct gfx_char_s */
+ glyph->index = 0;
+ glyph->pos.x = 0;
+ glyph->pos.y = 0;
+ glyph->image = NULL;
+
+ glyph->index = FT_Get_Char_Index( face, letter );
+
+ /* compute glyph origin */
+ if ( use_kerning && previous && glyph->index ) {
+ FT_Vector kerning;
+ FT_Get_Kerning (face, previous, glyph->index,
+ ft_kerning_default, &kerning);
+ ft_pen.x += kerning.x;
+ ft_pen.y += kerning.y;
}
- error = FT_Load_Glyph( face, glyph_index, 0 );
- if ( error ) {
- FT_Done_FreeType(library);
- return -1;
+
+ /* load the glyph image (in its native format) */
+ /* for now, we take a monochrome glyph bitmap */
+ error = FT_Load_Glyph (face, glyph->index, FT_LOAD_DEFAULT);
+ if (error) {
+ fprintf (stderr, "couldn't load glyph: %c\n", letter);
+ continue;
+ }
+ error = FT_Get_Glyph (slot, &glyph->image);
+ if (error) {
+ fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
+ continue;
}
- if (! previous) {
- text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
+ /* if we are in tabbing mode, we replace the tab with a space and shift the position
+ of the space so that its left edge is where the tab was supposed to land us */
+ if (gottab){
+ /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
+ ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
+ }
+ /* store current pen position */
+ glyph->pos.x = ft_pen.x;
+ glyph->pos.y = ft_pen.y;
+
+
+ ft_pen.x += slot->advance.x;
+ ft_pen.y += slot->advance.y;
+
+ /* rotate glyph */
+ vec = glyph->pos;
+ FT_Vector_Transform (&vec, &string->transform);
+ error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
+ if (error) {
+ fprintf (stderr, "couldn't transform glyph\n");
+ continue;
+ }
+
+ /* convert to a bitmap - destroy native image */
+ error = FT_Glyph_To_Bitmap (&glyph->image, FT_RENDER_MODE_NORMAL, 0, 1);
+ if (error) {
+ fprintf (stderr, "couldn't convert glyph to bitmap\n");
+ continue;
}
- text_width += (double)slot->metrics.horiAdvance / 64.0;
+
+ /* increment number of glyphs */
+ previous = glyph->index;
+ string->num_glyphs++;
}
- text_width -= (double)slot->metrics.horiAdvance / 64.0; /* remove last step */
- text_width += (double)slot->metrics.width / 64.0; /* add just char width */
- text_width += (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
- FT_Done_FreeType(library);
- return text_width;
+/* printf ("number of glyphs = %d\n", string->num_glyphs);*/
+ compute_string_bbox( string );
+ /* the last character was a tab */
+ if (gottab) {
+ string->width = ft_pen.x;
+ } else {
+ string->width = string->bbox.xMax - string->bbox.xMin;
+ }
+ string->height = string->bbox.yMax - string->bbox.yMin;
+ return string;
}
-
-
static int gfx_save_png (art_u8 *buffer, FILE *fp,
long width, long height, long bytes_per_pixel);
/* render grafics into png image */
+
int gfx_render_png (gfx_canvas_t *canvas,
art_u32 width, art_u32 height,
- double zoom,
gfx_color_t background, FILE *fp){
FT_Library library;
gfx_node_t *node = canvas->firstnode;
+ /*
art_u8 red = background >> 24, green = (background >> 16) & 0xff;
art_u8 blue = (background >> 8) & 0xff, alpha = ( background & 0xff );
- unsigned long pys_width = width * zoom;
- unsigned long pys_height = height * zoom;
- const int bytes_per_pixel = 3;
+ */
+ unsigned long pys_width = width * canvas->zoom;
+ 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);
- art_rgb_run_alpha (buffer, red, green, blue, alpha, pys_width*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;
+ i++){
+ *(buffp++)=background;
+ }
FT_Init_FreeType( &library );
while(node){
switch (node->type) {
case GFX_LINE:
case GFX_AREA: {
- ArtVpath *vec;
+ ArtVpath *vec,*pvec;
double dst[6];
- ArtSVP *svp;
- art_affine_scale(dst,zoom,zoom);
+ ArtSVP *svp,*svpt;
+ 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);
if(node->type == GFX_LINE){
- svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
+ svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
ART_PATH_STROKE_CAP_ROUND,
- node->size*zoom,1,1);
+ node->size*canvas->zoom,4,0.25);
} else {
- svp = art_svp_from_vpath ( vec );
+ svp = art_svp_from_vpath ( pvec );
+ 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);
- art_rgb_svp_alpha (svp ,0,0, pys_width, pys_height,
- node->color, buffer, rowstride, NULL);
- art_free(svp);
+ art_free(pvec);
+ /* this is from gnome since libart does not have this yet */
+ gnome_print_art_rgba_svp_alpha (svp ,0,0, pys_width, pys_height,
+ node->color, buffer, rowstride, NULL);
+ art_svp_free(svp);
break;
}
case GFX_TEXT: {
+ unsigned int n;
int error;
- float text_width=0.0, text_height = 0.0;
- unsigned char *text;
- art_u8 fcolor[3],falpha;
+ art_u8 fcolor[4],falpha;
FT_Face face;
- FT_GlyphSlot slot;
- FT_UInt previous=0;
- FT_UInt glyph_index=0;
- FT_Bool use_kerning;
+ gfx_char glyph;
+ gfx_string string;
+ FT_Vector vec; /* 26.6 */
float pen_x = 0.0 , pen_y = 0.0;
/* double x,y; */
- long ix,iy,iz;
+ long ix,iy;
fcolor[0] = node->color >> 24;
fcolor[1] = (node->color >> 16) & 0xff;
(char *)node->filename,
0,
&face );
- if ( error ) break;
- use_kerning = FT_HAS_KERNING(face);
-
+ if ( error ) {
+ rrd_set_error("failed to load %s",node->filename);
+ break;
+ }
error = FT_Set_Char_Size(face, /* handle to face object */
(long)(node->size*64),
(long)(node->size*64),
- (long)(100*zoom),
- (long)(100*zoom));
+ (long)(100*canvas->zoom),
+ (long)(100*canvas->zoom));
if ( error ) break;
- pen_x = node->x * zoom;
- pen_y = node->y * zoom;
- slot = face->glyph;
-
- for(text=(unsigned char *)node->text;*text;text++) {
- previous = glyph_index;
- glyph_index = FT_Get_Char_Index( face, *text);
-
- if (use_kerning && previous && glyph_index){
- FT_Vector delta;
- FT_Get_Kerning( face, previous, glyph_index,
- 0, &delta );
- text_width += (double)delta.x / 64.0;
-
- }
- error = FT_Load_Glyph( face, glyph_index, 0 );
- if ( error ) break;
- if (previous == 0){
- pen_x -= (double)slot->metrics.horiBearingX / 64.0; /* adjust pos for first char */
- text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
- }
- if ( text_height < (double)slot->metrics.horiBearingY / 64.0 ) {
- text_height = (double)slot->metrics.horiBearingY / 64.0;
- }
- text_width += (double)slot->metrics.horiAdvance / 64.0;
- }
- text_width -= (double)slot->metrics.horiAdvance / 64.0; /* remove last step */
- text_width += (double)slot->metrics.width / 64.0; /* add just char width */
- text_width += (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
-
+ pen_x = node->x * canvas->zoom;
+ pen_y = node->y * canvas->zoom;
+
+ string = gfx_string_create (face, node->text, node->angle, node->tabwidth);
switch(node->halign){
- case GFX_H_RIGHT: pen_x -= text_width; break;
- case GFX_H_CENTER: pen_x -= text_width / 2.0; break;
- case GFX_H_LEFT: break;
+ case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
+ break;
+ case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
+ -string->bbox.xMax/2:-string->bbox.xMin/2;
+ break;
+ case GFX_H_LEFT: vec.x = -string->bbox.xMin;
+ break;
+ case GFX_H_NULL: vec.x = 0;
+ break;
}
switch(node->valign){
- case GFX_V_TOP: pen_y += text_height; break;
- case GFX_V_CENTER: pen_y += text_height / 2.0; break;
- case GFX_V_BOTTOM: break;
+ case GFX_V_TOP: vec.y = string->bbox.yMax;
+ break;
+ case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
+ string->bbox.yMax/2:string->bbox.yMin/2;
+ break;
+ case GFX_V_BOTTOM: vec.y = 0;
+ break;
+ case GFX_V_NULL: vec.y = 0;
+ break;
}
+ pen_x += vec.x/64;
+ pen_y += vec.y/64;
+ glyph = string->glyphs;
+ for(n=0; n<string->num_glyphs; ++n, ++glyph) {
+ int gr;
+ FT_Glyph image;
+ FT_BitmapGlyph bit;
+ /* long buf_x,comp_n; */
+ /* make copy to transform */
+ if (! glyph->image) {
+ fprintf (stderr, "no image\n");
+ continue;
+ }
+ error = FT_Glyph_Copy (glyph->image, &image);
+ if (error) {
+ fprintf (stderr, "couldn't copy image\n");
+ continue;
+ }
+
+ /* transform it */
+ vec = glyph->pos;
+ FT_Vector_Transform (&vec, &string->transform);
+
+ bit = (FT_BitmapGlyph) image;
+ gr = bit->bitmap.num_grays -1;
+/*
+ buf_x = (pen_x + 0.5) + (double)bit->left;
+ comp_n = buf_x + bit->bitmap.width > pys_width ? pys_width - buf_x : bit->bitmap.width;
+ if (buf_x < 0 || buf_x >= (long)pys_width) continue;
+ buf_x *= bytes_per_pixel ;
+ for (iy=0; iy < bit->bitmap.rows; iy++){
+ long buf_y = iy+(pen_y+0.5)-(double)bit->top;
+ if (buf_y < 0 || buf_y >= (long)pys_height) continue;
+ buf_y *= rowstride;
+ for (ix=0;ix < bit->bitmap.width;ix++){
+ *(letter + (ix*bytes_per_pixel+3)) = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
+ }
+ art_rgba_rgba_composite(buffer + buf_y + buf_x ,letter,comp_n);
+ }
+ art_free(letter);
+*/
- glyph_index=0;
- for(text=(unsigned char *)node->text;*text;text++) {
- int gr;
- previous = glyph_index;
- glyph_index = FT_Get_Char_Index( face, *text);
-
- if (use_kerning && previous && glyph_index){
- FT_Vector delta;
- FT_Get_Kerning( face, previous, glyph_index,
- 0, &delta );
- pen_x += (double)delta.x / 64.0;
-
+ for (iy=0; iy < bit->bitmap.rows; iy++){
+ long buf_y = iy+(pen_y+0.5)-bit->top;
+ if (buf_y < 0 || buf_y >= (long)pys_height) continue;
+ buf_y *= rowstride;
+ for (ix=0;ix < bit->bitmap.width;ix++){
+ long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
+ art_u8 font_alpha;
+
+ if (buf_x < 0 || buf_x >= (long)pys_width) continue;
+ buf_x *= bytes_per_pixel ;
+ font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
+ if (font_alpha > 0){
+ fcolor[3] = (art_u8)((double)font_alpha / gr * falpha);
+ art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1);
+ }
+ }
}
- error = FT_Load_Glyph( face, glyph_index, FT_LOAD_RENDER );
- if ( error ) break;
- gr = slot->bitmap.num_grays -1;
- for (iy=0; iy < slot->bitmap.rows; iy++){
- long buf_y = iy+(pen_y+0.5)-slot->bitmap_top;
- if (buf_y < 0 || buf_y >= pys_height) continue;
+
+/*
+ for (iy=0; iy < bit->bitmap.rows; iy++){
+ long buf_y = iy+(pen_y+0.5)-bit->top;
+ if (buf_y < 0 || buf_y >= (long)pys_height) continue;
buf_y *= rowstride;
- for (ix=0;ix < slot->bitmap.width;ix++){
- long buf_x = ix + (pen_x + 0.5) + (double)slot->bitmap_left ;
+ for (ix=0;ix < bit->bitmap.width;ix++){
+ long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
art_u8 font_alpha;
- if (buf_x < 0 || buf_x >= pys_width) continue;
+ if (buf_x < 0 || buf_x >= (long)pys_width) continue;
buf_x *= bytes_per_pixel ;
- font_alpha = *(slot->bitmap.buffer + iy * slot->bitmap.width + ix);
+ font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
font_alpha = (art_u8)((double)font_alpha / gr * falpha);
for (iz = 0; iz < 3; iz++){
art_u8 *orig = buffer + buf_y + buf_x + iz;
}
}
}
- pen_x += (double)slot->metrics.horiAdvance / 64.0;
+*/
+ FT_Done_Glyph (image);
}
+ gfx_string_destroy(string);
}
}
node = node->next;
while(node){
next = node->next;
art_free(node->path);
- art_free(node->svp);
free(node->text);
free(node->filename);
art_free(node);
node = next;
}
+ art_free(canvas);
return 0;
}
if (info_ptr == NULL)
{
+ png_free(png_ptr,row_pointers);
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return (1);
}
png_init_io(png_ptr, fp);
png_set_IHDR (png_ptr, info_ptr,width, height,
- 8, PNG_COLOR_TYPE_RGB,
+ 8, PNG_COLOR_TYPE_RGB_ALPHA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
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);
+ png_set_compression_level(png_ptr,1);
+ png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
+ /*
+ png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_FILTER_SUB);
+ png_set_compression_strategy(png_ptr,Z_HUFFMAN_ONLY);
+ png_set_compression_level(png_ptr,Z_BEST_SPEED); */
+
/* Write header data */
png_write_info (png_ptr, info_ptr);
-
for (i = 0; i < height; i++)
row_pointers[i] = (png_bytep) (buffer + i*rowstride);
-
+
png_write_image(png_ptr, row_pointers);
png_write_end(png_ptr, info_ptr);
+ png_free(png_ptr,row_pointers);
png_destroy_write_struct(&png_ptr, &info_ptr);
return 1;
}
+
+
+/* ------- 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";
+typedef struct svg_dash
+{
+ int dash_enable;
+ double dash_adjust, dash_len, dash_offset;
+ double adjusted_on, adjusted_off;
+} svg_dash;
+
+
+static void svg_print_indent(FILE *fp)
+{
+ int i;
+ for (i = svg_indent - svg_single_line; i > 0; i--) {
+ putc(' ', fp);
+ putc(' ', fp);
+ }
+}
+
+static void svg_start_tag(FILE *fp, const char *name)
+{
+ svg_print_indent(fp);
+ putc('<', fp);
+ fputs(name, fp);
+ svg_indent++;
+}
+
+static void svg_close_tag_single_line(FILE *fp)
+{
+ svg_single_line++;
+ putc('>', fp);
+}
+
+static void svg_close_tag(FILE *fp)
+{
+ putc('>', fp);
+ if (!svg_single_line)
+ putc('\n', fp);
+}
+
+static void svg_end_tag(FILE *fp, const char *name)
+{
+ /* name is NULL if closing empty-node tag */
+ svg_indent--;
+ if (svg_single_line)
+ svg_single_line--;
+ else if (name)
+ svg_print_indent(fp);
+ if (name != NULL) {
+ fputs("</", fp);
+ fputs(name, fp);
+ } else {
+ putc('/', fp);
+ }
+ svg_close_tag(fp);
+}
+
+static void svg_close_tag_empty_node(FILE *fp)
+{
+ svg_end_tag(fp, NULL);
+}
+
+static void svg_write_text(FILE *fp, const char *text)
+{
+ const unsigned char *p, *start, *last;
+ unsigned int ch;
+ p = (const unsigned char*)text;
+ if (!p)
+ return;
+ /* trim leading spaces */
+ while (*p == ' ')
+ p++;
+ start = p;
+ /* trim trailing spaces */
+ last = p - 1;
+ while ((ch = *p) != 0) {
+ if (ch != ' ')
+ last = p;
+ p++;
+ }
+ /* encode trimmed text */
+ p = start;
+ while (p <= last) {
+ ch = *p++;
+ ch = afm_host2unicode(ch); /* unsafe macro */
+ switch (ch) {
+ case '&': fputs("&", fp); break;
+ case '<': fputs("<", fp); break;
+ case '>': fputs(">", fp); break;
+ case '"': fputs(""", fp); break;
+ default:
+ if (ch >= 127)
+ fprintf(fp, "&#%d;", ch);
+ else
+ putc(ch, fp);
+ }
+ }
+}
+
+static void svg_format_number(char *buf, int bufsize, double d)
+{
+ /* omit decimals if integer to reduce filesize */
+ char *p;
+ snprintf(buf, bufsize, "%.2f", d);
+ p = buf; /* doesn't trust snprintf return value */
+ while (*p)
+ p++;
+ while (--p > buf) {
+ char ch = *p;
+ if (ch == '0') {
+ *p = '\0'; /* zap trailing zeros */
+ continue;
+ }
+ if (ch == '.')
+ *p = '\0'; /* zap trailing dot */
+ break;
+ }
+}
+
+static void svg_write_number(FILE *fp, double d)
+{
+ char buf[60];
+ svg_format_number(buf, sizeof(buf), d);
+ fputs(buf, fp);
+}
+
+static int svg_color_is_black(int c)
+{
+ /* gfx_color_t is RRGGBBAA */
+ return c == 0x000000FF;
+}
+
+static void svg_write_color(FILE *fp, gfx_color_t c, const char *attr)
+{
+ /* gfx_color_t is RRGGBBAA, svg can use #RRGGBB and #RGB like html */
+ gfx_color_t rrggbb = (int)((c >> 8) & 0xFFFFFF);
+ gfx_color_t opacity = c & 0xFF;
+ fprintf(fp, " %s=\"", attr);
+ if ((rrggbb & 0x0F0F0F) == ((rrggbb >> 4) & 0x0F0F0F)) {
+ /* css2 short form, #rgb is #rrggbb, not #r0g0b0 */
+ fprintf(fp, "#%03lX",
+ ( ((rrggbb >> 8) & 0xF00)
+ | ((rrggbb >> 4) & 0x0F0)
+ | ( rrggbb & 0x00F)));
+ } else {
+ fprintf(fp, "#%06lX", rrggbb);
+ }
+ fputs("\"", fp);
+ if (opacity != 0xFF) {
+ fprintf(fp, " stroke-opacity=\"");
+ svg_write_number(fp, opacity / 255.0);
+ fputs("\"", fp);
+ }
+}
+
+static void svg_get_dash(gfx_node_t *node, svg_dash *d)
+{
+ double offset;
+ int mult;
+ if (node->dash_on <= 0 || node->dash_off <= 0) {
+ d->dash_enable = 0;
+ return;
+ }
+ d->dash_enable = 1;
+ d->dash_len = node->dash_on + node->dash_off;
+ /* dash on/off adjustment due to round caps */
+ d->dash_adjust = 0.8 * node->size;
+ d->adjusted_on = node->dash_on - d->dash_adjust;
+ if (d->adjusted_on < 0.01)
+ d->adjusted_on = 0.01;
+ d->adjusted_off = d->dash_len - d->adjusted_on;
+ /* dash offset calc */
+ if (node->path[0].x == node->path[1].x) /* only good for horz/vert lines */
+ offset = node->path[0].y;
+ else
+ offset = node->path[0].x;
+ mult = (int)fabs(offset / d->dash_len);
+ d->dash_offset = offset - mult * d->dash_len;
+ if (node->path[0].x < node->path[1].x || node->path[0].y < node->path[1].y)
+ d->dash_offset = d->dash_len - d->dash_offset;
+}
+
+static int svg_dash_equal(svg_dash *a, svg_dash *b)
+{
+ if (a->dash_enable != b->dash_enable)
+ return 0;
+ if (a->adjusted_on != b->adjusted_on)
+ return 0;
+ if (a->adjusted_off != b->adjusted_off)
+ return 0;
+ /* rest of properties will be the same when on+off are */
+ return 1;
+}
+
+static void svg_common_path_attributes(FILE *fp, gfx_node_t *node)
+{
+ svg_dash dash_info;
+ svg_get_dash(node, &dash_info);
+ fputs(" stroke-width=\"", fp);
+ svg_write_number(fp, node->size);
+ fputs("\"", fp);
+ svg_write_color(fp, node->color, "stroke");
+ fputs(" fill=\"none\"", fp);
+ if (dash_info.dash_enable) {
+ if (dash_info.dash_offset != 0) {
+ fputs(" stroke-dashoffset=\"", fp);
+ svg_write_number(fp, dash_info.dash_offset);
+ fputs("\"", fp);
+ }
+ fputs(" stroke-dasharray=\"", fp);
+ svg_write_number(fp, dash_info.adjusted_on);
+ fputs(",", fp);
+ svg_write_number(fp, dash_info.adjusted_off);
+ fputs("\"", fp);
+ }
+}
+
+static int svg_is_int_step(double a, double b)
+{
+ double diff = fabs(a - b);
+ return floor(diff) == diff;
+}
+
+static int svg_path_straight_segment(FILE *fp,
+ double lastA, double currentA, double currentB,
+ gfx_node_t *node,
+ int segment_idx, int isx, char absChar, char relChar)
+{
+ if (!svg_is_int_step(lastA, currentA)) {
+ putc(absChar, fp);
+ svg_write_number(fp, currentA);
+ return 0;
+ }
+ if (segment_idx < node->points - 1) {
+ ArtVpath *vec = node->path + segment_idx + 1;
+ if (vec->code == ART_LINETO) {
+ double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
+ double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
+ if (nextB == currentB
+ && ((currentA >= lastA) == (nextA >= currentA))
+ && svg_is_int_step(currentA, nextA)) {
+ return 1; /* skip to next as it is a straight line */
+ }
+ }
+ }
+ putc(relChar, fp);
+ svg_write_number(fp, currentA - lastA);
+ return 0;
+}
+
+static void svg_path(FILE *fp, gfx_node_t *node, int multi)
+{
+ int i;
+ double lastX = 0, lastY = 0;
+ /* for straight lines <path..> tags take less space than
+ <line..> tags because of the efficient packing
+ in the 'd' attribute */
+ svg_start_tag(fp, "path");
+ if (!multi)
+ svg_common_path_attributes(fp, node);
+ fputs(" d=\"", fp);
+ /* specification of the 'd' attribute: */
+ /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
+ for (i = 0; i < node->points; i++) {
+ ArtVpath *vec = node->path + i;
+ double x = vec->x - LINEOFFSET;
+ double y = vec->y - LINEOFFSET;
+ switch (vec->code) {
+ case ART_MOVETO_OPEN: /* fall-through */
+ case ART_MOVETO:
+ putc('M', fp);
+ svg_write_number(fp, x);
+ putc(',', fp);
+ svg_write_number(fp, y);
+ break;
+ case ART_LINETO:
+ /* try optimize filesize by using minimal lineto commands */
+ /* without introducing rounding errors. */
+ if (x == lastX) {
+ if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
+ continue;
+ } else if (y == lastY) {
+ if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
+ continue;
+ } else {
+ putc('L', fp);
+ svg_write_number(fp, x);
+ putc(',', fp);
+ svg_write_number(fp, y);
+ }
+ break;
+ case ART_CURVETO: break; /* unsupported */
+ case ART_END: break; /* nop */
+ }
+ lastX = x;
+ lastY = y;
+ }
+ if (node->closed_path)
+ fputs(" Z", fp);
+ fputs("\"", fp);
+ svg_close_tag_empty_node(fp);
+}
+
+static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
+{
+ /* optimize for multiple paths with the same color, penwidth, etc. */
+ int num = 1;
+ gfx_node_t *node = *nodeR;
+ gfx_node_t *next = node->next;
+ while (next) {
+ if (next->type != node->type
+ || next->size != node->size
+ || next->color != node->color
+ || next->dash_on != node->dash_on
+ || next->dash_off != node->dash_off)
+ break;
+ next = next->next;
+ num++;
+ }
+ if (num == 1) {
+ svg_path(fp, node, 0);
+ return;
+ }
+ svg_start_tag(fp, "g");
+ svg_common_path_attributes(fp, node);
+ svg_close_tag(fp);
+ while (num && node) {
+ svg_path(fp, node, 1);
+ if (!--num)
+ break;
+ node = node->next;
+ *nodeR = node;
+ }
+ svg_end_tag(fp, "g");
+}
+
+static void svg_area(FILE *fp, gfx_node_t *node)
+{
+ int i;
+ double startX = 0, startY = 0;
+ svg_start_tag(fp, "polygon");
+ fputs(" ", fp);
+ svg_write_color(fp, node->color, "fill");
+ fputs(" points=\"", fp);
+ for (i = 0; i < node->points; i++) {
+ ArtVpath *vec = node->path + i;
+ double x = vec->x - LINEOFFSET;
+ double y = vec->y - LINEOFFSET;
+ switch (vec->code) {
+ case ART_MOVETO_OPEN: /* fall-through */
+ case ART_MOVETO:
+ svg_write_number(fp, x);
+ putc(',', fp);
+ svg_write_number(fp, y);
+ startX = x;
+ startY = y;
+ break;
+ case ART_LINETO:
+ if (i == node->points - 2
+ && node->path[i + 1].code == ART_END
+ && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
+ break; /* poly area always closed, no need for last point */
+ }
+ putc(' ', fp);
+ svg_write_number(fp, x);
+ putc(',', fp);
+ svg_write_number(fp, y);
+ break;
+ case ART_CURVETO: break; /* unsupported */
+ case ART_END: break; /* nop */
+ }
+ }
+ fputs("\"", fp);
+ svg_close_tag_empty_node(fp);
+}
+
+static void svg_text(FILE *fp, gfx_node_t *node)
+{
+ double x = node->x - LINEOFFSET;
+ double y = node->y - LINEOFFSET;
+ 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;
+ 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);
+ 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);
+ svg_end_tag(fp, "text");
+ if (node->angle != 0)
+ svg_end_tag(fp, "g");
+}
+
+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;
+ 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"
+"\n"
+" The width/height attributes in the outhermost svg node\n"
+" are just default sizes for the browser which is used\n"
+" if the svg file is openened directly without being\n"
+" embedded in an html file.\n"
+" The viewBox is the local coord system for rrdtool.\n"
+"-->\n", fp);
+ svg_start_tag(fp, "svg");
+ fputs(" width=\"", fp);
+ svg_write_number(fp, width * canvas->zoom);
+ fputs("\" height=\"", fp);
+ svg_write_number(fp, height * canvas->zoom);
+ fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
+ svg_write_number(fp, -LINEOFFSET);
+ fputs(" ", fp);
+ svg_write_number(fp, -LINEOFFSET);
+ fputs(" ", fp);
+ svg_write_number(fp, width - LINEOFFSET);
+ fputs(" ", fp);
+ svg_write_number(fp, height - LINEOFFSET);
+ fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
+ fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
+ fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
+ svg_close_tag(fp);
+ svg_start_tag(fp, "rect");
+ fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
+ svg_write_color(fp, background, "fill");
+ svg_close_tag_empty_node(fp);
+ while (node) {
+ switch (node->type) {
+ case GFX_LINE:
+ svg_multi_path(fp, &node);
+ break;
+ case GFX_AREA:
+ svg_area(fp, node);
+ break;
+ case GFX_TEXT:
+ svg_text(fp, node);
+ }
+ node = node->next;
+ }
+ svg_end_tag(fp, "svg");
+ return 0;
+}
+
+/* ------- EPS -------
+ EPS and Postscript references:
+ http://partners.adobe.com/asn/developer/technotes/postscript.html
+*/
+
+typedef struct eps_font
+{
+ const char *ps_font;
+ int id;
+ struct eps_font *next;
+} eps_font;
+
+typedef struct eps_state
+{
+ FILE *fp;
+ gfx_canvas_t *canvas;
+ art_u32 page_width, page_height;
+ eps_font *font_list;
+ /*--*/
+ gfx_color_t color;
+ const char *font;
+ double font_size;
+ double line_width;
+ int linecap, linejoin;
+ int has_dash;
+} eps_state;
+
+static void eps_set_color(eps_state *state, gfx_color_t color)
+{
+ /* 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));
+ state->color = color;
+}
+
+static int eps_add_font(eps_state *state, gfx_node_t *node)
+{
+ /* The fonts list could be postponed to the end using
+ (atend), but let's be nice and have them in the header. */
+ const char *ps_font = afm_get_font_postscript_name(node->filename);
+ eps_font *ef;
+ for (ef = state->font_list; ef; ef = ef->next) {
+ if (!strcmp(ps_font, ef->ps_font))
+ return 0;
+ }
+ ef = malloc(sizeof(eps_font));
+ if (ef == NULL) {
+ rrd_set_error("malloc for eps_font");
+ return -1;
+ }
+ ef->next = state->font_list;
+ ef->ps_font = ps_font;
+ state->font_list = ef;
+ return 0;
+}
+
+static void eps_list_fonts(eps_state *state, const char *dscName)
+{
+ eps_font *ef;
+ int lineLen = strlen(dscName);
+ if (!state->font_list)
+ return;
+ fputs(dscName, state->fp);
+ for (ef = state->font_list; ef; ef = ef->next) {
+ int nameLen = strlen(ef->ps_font);
+ if (lineLen + nameLen > 100 && lineLen) {
+ fputs("\n", state->fp);
+ fputs("%%- \n", state->fp);
+ lineLen = 5;
+ } else {
+ fputs(" ", state->fp);
+ lineLen++;
+ }
+ fputs(ef->ps_font, state->fp);
+ lineLen += nameLen;
+ }
+ fputs("\n", state->fp);
+}
+
+static void eps_define_fonts(eps_state *state)
+{
+ eps_font *ef;
+ if (!state->font_list)
+ return;
+ for (ef = state->font_list; ef; ef = ef->next) {
+ /* PostScript¨ LANGUAGE REFERENCE third edition
+ page 349 */
+ fprintf(state->fp,
+ "%%\n"
+ "/%s findfont dup length dict begin\n"
+ "{ 1 index /FID ne {def} {pop pop} ifelse } forall\n"
+ "/Encoding ISOLatin1Encoding def\n"
+ "currentdict end\n"
+ "/%s-ISOLatin1 exch definefont pop\n"
+ "/SetFont-%s { /%s-ISOLatin1 findfont exch scalefont setfont } bd\n",
+ ef->ps_font, ef->ps_font, ef->ps_font, ef->ps_font);
+ }
+}
+
+static int eps_prologue(eps_state *state)
+{
+ gfx_node_t *node;
+ fputs(
+ "%!PS-Adobe-3.0 EPSF-3.0\n"
+ "%%Creator: RRDtool 1.2rc6 Tobias Oetiker, http://tobi.oetiker.ch\n"
+ /* can't like weird chars here */
+ "%%Title: (RRDtool output)\n"
+ "%%DocumentData: Clean7Bit\n"
+ "", state->fp);
+ fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
+ state->page_width, state->page_height);
+ for (node = state->canvas->firstnode; node; node = node->next) {
+ if (node->type == GFX_TEXT && eps_add_font(state, node) == -1)
+ return -1;
+ }
+ eps_list_fonts(state, "%%DocumentFonts:");
+ eps_list_fonts(state, "%%DocumentNeededFonts:");
+ fputs(
+ "%%EndComments\n"
+ "%%BeginProlog\n"
+ "%%EndProlog\n" /* must have, or BoundingBox is ignored */
+ "/bd { bind def } bind def\n"
+ "", state->fp);
+ fprintf(state->fp, "/X { %.2f add } bd\n", LINEOFFSET);
+ fputs(
+ "/X2 {X exch X exch} bd\n"
+ "/M {X2 moveto} bd\n"
+ "/L {X2 lineto} bd\n"
+ "/m {moveto} bd\n"
+ "/l {lineto} bd\n"
+ "/S {stroke} bd\n"
+ "/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"
+ "/Rgb { 255.0 div 3 1 roll\n"
+ " 255.0 div 3 1 roll \n"
+ " 255.0 div 3 1 roll setrgbcolor } bd\n"
+ "", state->fp);
+ eps_define_fonts(state);
+ return 0;
+}
+
+static void eps_clear_dash(eps_state *state)
+{
+ if (!state->has_dash)
+ return;
+ state->has_dash = 0;
+ fputs("[1 0] 0 setdash\n", state->fp);
+}
+
+static void eps_write_linearea(eps_state *state, gfx_node_t *node)
+{
+ int i;
+ FILE *fp = state->fp;
+ int useOffset = 0;
+ int clearDashIfAny = 1;
+ eps_set_color(state, node->color);
+ if (node->type == GFX_LINE) {
+ svg_dash dash_info;
+ if (state->linecap != 1) {
+ fputs("1 setlinecap\n", fp);
+ state->linecap = 1;
+ }
+ if (state->linejoin != 1) {
+ fputs("1 setlinejoin\n", fp);
+ state->linejoin = 1;
+ }
+ svg_get_dash(node, &dash_info);
+ if (dash_info.dash_enable) {
+ clearDashIfAny = 0;
+ state->has_dash = 1;
+ fputs("[", fp);
+ svg_write_number(fp, dash_info.adjusted_on);
+ fputs(" ", fp);
+ svg_write_number(fp, dash_info.adjusted_off);
+ fputs("] ", fp);
+ svg_write_number(fp, dash_info.dash_offset);
+ fputs(" setdash\n", fp);
+ }
+ }
+ if (clearDashIfAny)
+ eps_clear_dash(state);
+ for (i = 0; i < node->points; i++) {
+ ArtVpath *vec = node->path + i;
+ double x = vec->x;
+ double y = state->page_height - vec->y;
+ if (vec->code == ART_MOVETO_OPEN || vec->code == ART_MOVETO)
+ useOffset = (fabs(x - floor(x) - 0.5) < 0.01 && fabs(y - floor(y) - 0.5) < 0.01);
+ if (useOffset) {
+ x -= LINEOFFSET;
+ y -= LINEOFFSET;
+ }
+ switch (vec->code) {
+ case ART_MOVETO_OPEN: /* fall-through */
+ case ART_MOVETO:
+ svg_write_number(fp, x);
+ fputc(' ', fp);
+ svg_write_number(fp, y);
+ fputc(' ', fp);
+ fputs(useOffset ? "M\n" : "m\n", fp);
+ break;
+ case ART_LINETO:
+ svg_write_number(fp, x);
+ fputc(' ', fp);
+ svg_write_number(fp, y);
+ fputc(' ', fp);
+ fputs(useOffset ? "L\n" : "l\n", fp);
+ break;
+ case ART_CURVETO: break; /* unsupported */
+ case ART_END: break; /* nop */
+ }
+ }
+ if (node->type == GFX_LINE) {
+ if (node->closed_path)
+ fputs("CP ", fp);
+ if (node->size != state->line_width) {
+ state->line_width = node->size;
+ svg_write_number(fp, state->line_width);
+ fputs(" WS\n", fp);
+ } else {
+ fputs("S\n", fp);
+ }
+ } else {
+ fputs("F\n", fp);
+ }
+}
+
+static void eps_write_text(eps_state *state, gfx_node_t *node)
+{
+ FILE *fp = state->fp;
+ const unsigned 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;
+ eps_set_color(state, node->color);
+ if (strcmp(ps_font, state->font) || node->size != state->font_size) {
+ state->font = ps_font;
+ state->font_size = node->size;
+ svg_write_number(fp, state->font_size);
+ fprintf(fp, " SetFont-%s\n", state->font);
+ }
+ fputs("(", fp);
+ lineLen = 20;
+ for (p = (const unsigned char*)node->text; *p; p++) {
+ if (lineLen > 70) {
+ fputs("\\\n", fp); /* backslash and \n */
+ lineLen = 0;
+ }
+ switch (*p) {
+ case '(':
+ case ')':
+ case '\\':
+ case '\n':
+ case '\r':
+ case '\t':
+ fputc('\\', fp);
+ lineLen++;
+ /* fall-through */
+ 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 (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);
+ } else {
+ svg_write_number(fp, x);
+ fputc(' ', fp);
+ svg_write_number(fp, y);
+ fputs(" T", fp);
+ fputc(align, fp);
+ fputc('\n', fp);
+ }
+}
+
+static int eps_write_content(eps_state *state)
+{
+ gfx_node_t *node;
+ fputs("%\n", state->fp);
+ for (node = state->canvas->firstnode; node; node = node->next) {
+ switch (node->type) {
+ case GFX_LINE:
+ case GFX_AREA:
+ eps_write_linearea(state, node);
+ break;
+ case GFX_TEXT:
+ eps_write_text(state, node);
+ break;
+ }
+ }
+ return 0;
+}
+
+int gfx_render_eps (gfx_canvas_t *canvas,
+ art_u32 width, art_u32 height,
+ gfx_color_t background, FILE *fp){
+ struct eps_state state;
+ state.fp = fp;
+ state.canvas = canvas;
+ state.page_width = width;
+ state.page_height = height;
+ state.font = "no-default-font";
+ state.font_size = -1;
+ state.color = 0; /* black */
+ state.font_list = NULL;
+ state.linecap = -1;
+ state.linejoin = -1;
+ state.has_dash = 0;
+ if (eps_prologue(&state) == -1)
+ return -1;
+ eps_set_color(&state, background);
+ fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
+ height, width, height, width);
+ if (eps_write_content(&state) == -1)
+ return 0;
+ fputs("showpage\n", fp);
+ fputs("%%EOF\n", fp);
+ while (state.font_list) {
+ eps_font *next = state.font_list->next;
+ free(state.font_list);
+ state.font_list = next;
+ }
+ return 0;
+}
+
+/* ------- PDF -------
+ PDF references page:
+ http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
+*/
+
+typedef struct pdf_buffer
+{
+ int id, is_obj, is_dict, is_stream, pdf_file_pos;
+ char *data;
+ int alloc_size, current_size;
+ struct pdf_buffer *previous_buffer, *next_buffer;
+ struct pdf_state *state;
+} pdf_buffer;
+
+typedef struct pdf_font
+{
+ const char *ps_font;
+ pdf_buffer obj;
+ struct pdf_font *next;
+} pdf_font;
+
+typedef struct pdf_state
+{
+ FILE *fp;
+ gfx_canvas_t *canvas;
+ art_u32 page_width, page_height;
+ pdf_font *font_list;
+ pdf_buffer *first_buffer, *last_buffer;
+ int pdf_file_pos;
+ int has_failed;
+ /*--*/
+ gfx_color_t stroke_color, fill_color;
+ int font_id;
+ double font_size;
+ double line_width;
+ svg_dash dash;
+ int linecap, linejoin;
+ int last_obj_id;
+ /*--*/
+ pdf_buffer pdf_header;
+ pdf_buffer catalog_obj, pages_obj, page1_obj;
+ pdf_buffer fontsdict_obj;
+ pdf_buffer graph_stream;
+} pdf_state;
+
+static void pdf_init_buffer(pdf_state *state, pdf_buffer *buf)
+{
+ int initial_size = 32;
+ buf->state = state;
+ buf->id = -42;
+ buf->alloc_size = 0;
+ buf->current_size = 0;
+ buf->data = (char*)malloc(initial_size);
+ buf->is_obj = 0;
+ buf->previous_buffer = NULL;
+ buf->next_buffer = NULL;
+ if (buf->data == NULL) {
+ rrd_set_error("malloc for pdf_buffer data");
+ state->has_failed = 1;
+ return;
+ }
+ buf->alloc_size = initial_size;
+ if (state->last_buffer)
+ state->last_buffer->next_buffer = buf;
+ if (state->first_buffer == NULL)
+ state->first_buffer = buf;
+ buf->previous_buffer = state->last_buffer;
+ state->last_buffer = buf;
+}
+
+static void pdf_put(pdf_buffer *buf, const char *text, int len)
+{
+ if (len <= 0)
+ return;
+ if (buf->alloc_size < buf->current_size + len) {
+ int new_size = buf->alloc_size;
+ char *new_buf;
+ while (new_size < buf->current_size + len)
+ new_size *= 4;
+ new_buf = (char*)malloc(new_size);
+ if (new_buf == NULL) {
+ rrd_set_error("re-malloc for pdf_buffer data");
+ buf->state->has_failed = 1;
+ return;
+ }
+ memcpy(new_buf, buf->data, buf->current_size);
+ free(buf->data);
+ buf->data = new_buf;
+ buf->alloc_size = new_size;
+ }
+ memcpy(buf->data + buf->current_size, text, len);
+ buf->current_size += len;
+}
+
+static void pdf_puts(pdf_buffer *buf, const char *text)
+{
+ pdf_put(buf, text, strlen(text));
+}
+
+static void pdf_indent(pdf_buffer *buf)
+{
+ pdf_puts(buf, "\t");
+}
+
+static void pdf_putsi(pdf_buffer *buf, const char *text)
+{
+ pdf_indent(buf);
+ pdf_puts(buf, text);
+}
+
+static void pdf_putint(pdf_buffer *buf, int i)
+{
+ char tmp[20];
+ sprintf(tmp, "%d", i);
+ pdf_puts(buf, tmp);
+}
+
+static void pdf_putnumber(pdf_buffer *buf, double d)
+{
+ char tmp[50];
+ svg_format_number(tmp, sizeof(tmp), d);
+ pdf_puts(buf, tmp);
+}
+
+static void pdf_init_object(pdf_state *state, pdf_buffer *buf)
+{
+ pdf_init_buffer(state, buf);
+ buf->id = ++state->last_obj_id;
+ buf->is_obj = 1;
+ buf->is_stream = 0;
+}
+
+static void pdf_init_dict(pdf_state *state, pdf_buffer *buf)
+{
+ pdf_init_object(state, buf);
+ buf->is_dict = 1;
+}
+
+static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
+ gfx_color_t *current_color, const char *op)
+{
+ /* gfx_color_t is RRGGBBAA */
+ if (*current_color == color)
+ return;
+ pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
+ pdf_puts(buf, " ");
+ pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
+ pdf_puts(buf, " ");
+ pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
+ pdf_puts(buf, " ");
+ pdf_puts(buf, op);
+ pdf_puts(buf, "\n");
+ *current_color = color;
+}
+
+static void pdf_set_stroke_color(pdf_buffer *buf, gfx_color_t color)
+{
+ pdf_set_color(buf, color, &buf->state->stroke_color, "RG");
+}
+
+static void pdf_set_fill_color(pdf_buffer *buf, gfx_color_t color)
+{
+ pdf_set_color(buf, color, &buf->state->fill_color, "rg");
+}
+
+static pdf_font *pdf_find_font(pdf_state *state, gfx_node_t *node)
+{
+ const char *ps_font = afm_get_font_postscript_name(node->filename);
+ pdf_font *ef;
+ for (ef = state->font_list; ef; ef = ef->next) {
+ if (!strcmp(ps_font, ef->ps_font))
+ return ef;
+ }
+ return NULL;
+}
+
+static void pdf_add_font(pdf_state *state, gfx_node_t *node)
+{
+ pdf_font *ef = pdf_find_font(state, node);
+ if (ef)
+ return;
+ ef = malloc(sizeof(pdf_font));
+ if (ef == NULL) {
+ rrd_set_error("malloc for pdf_font");
+ state->has_failed = 1;
+ return;
+ }
+ pdf_init_dict(state, &ef->obj);
+ ef->next = state->font_list;
+ ef->ps_font = afm_get_font_postscript_name(node->filename);
+ state->font_list = ef;
+ /* fonts dict */
+ pdf_putsi(&state->fontsdict_obj, "/F");
+ pdf_putint(&state->fontsdict_obj, ef->obj.id);
+ pdf_puts(&state->fontsdict_obj, " ");
+ pdf_putint(&state->fontsdict_obj, ef->obj.id);
+ pdf_puts(&state->fontsdict_obj, " 0 R\n");
+ /* fonts def */
+ pdf_putsi(&ef->obj, "/Type /Font\n");
+ pdf_putsi(&ef->obj, "/Subtype /Type1\n");
+ pdf_putsi(&ef->obj, "/Name /F");
+ pdf_putint(&ef->obj, ef->obj.id);
+ pdf_puts(&ef->obj, "\n");
+ pdf_putsi(&ef->obj, "/BaseFont /");
+ pdf_puts(&ef->obj, ef->ps_font);
+ pdf_puts(&ef->obj, "\n");
+ pdf_putsi(&ef->obj, "/Encoding /WinAnsiEncoding\n");
+ /* 'Cp1252' (this is latin 1 extended with 27 characters;
+ the encoding is also known as 'winansi')
+ http://www.lowagie.com/iText/tutorial/ch09.html */
+}
+
+static void pdf_create_fonts(pdf_state *state)
+{
+ gfx_node_t *node;
+ for (node = state->canvas->firstnode; node; node = node->next) {
+ if (node->type == GFX_TEXT)
+ pdf_add_font(state, node);
+ }
+}
+
+static void pdf_write_linearea(pdf_state *state, gfx_node_t *node)
+{
+ int i;
+ pdf_buffer *s = &state->graph_stream;
+ if (node->type == GFX_LINE) {
+ svg_dash dash_info;
+ svg_get_dash(node, &dash_info);
+ if (!svg_dash_equal(&dash_info, &state->dash)) {
+ state->dash = dash_info;
+ if (dash_info.dash_enable) {
+ pdf_puts(s, "[");
+ pdf_putnumber(s, dash_info.adjusted_on);
+ pdf_puts(s, " ");
+ pdf_putnumber(s, dash_info.adjusted_off);
+ pdf_puts(s, "] ");
+ pdf_putnumber(s, dash_info.dash_offset);
+ pdf_puts(s, " d\n");
+ } else {
+ pdf_puts(s, "[] 0 d\n");
+ }
+ }
+ pdf_set_stroke_color(s, node->color);
+ if (state->linecap != 1) {
+ pdf_puts(s, "1 j\n");
+ state->linecap = 1;
+ }
+ if (state->linejoin != 1) {
+ pdf_puts(s, "1 J\n");
+ state->linejoin = 1;
+ }
+ if (node->size != state->line_width) {
+ state->line_width = node->size;
+ pdf_putnumber(s, state->line_width);
+ pdf_puts(s, " w\n");
+ }
+ } else {
+ pdf_set_fill_color(s, node->color);
+ }
+ for (i = 0; i < node->points; i++) {
+ ArtVpath *vec = node->path + i;
+ double x = vec->x;
+ double y = state->page_height - vec->y;
+ if (node->type == GFX_AREA) {
+ x += LINEOFFSET; /* adjust for libart handling of areas */
+ y -= LINEOFFSET;
+ }
+ switch (vec->code) {
+ case ART_MOVETO_OPEN: /* fall-through */
+ case ART_MOVETO:
+ pdf_putnumber(s, x);
+ pdf_puts(s, " ");
+ pdf_putnumber(s, y);
+ pdf_puts(s, " m\n");
+ break;
+ case ART_LINETO:
+ pdf_putnumber(s, x);
+ pdf_puts(s, " ");
+ pdf_putnumber(s, y);
+ pdf_puts(s, " l\n");
+ break;
+ case ART_CURVETO: break; /* unsupported */
+ case ART_END: break; /* nop */
+ }
+ }
+ if (node->type == GFX_LINE) {
+ pdf_puts(s, node->closed_path ? "s\n" : "S\n");
+ } else {
+ pdf_puts(s, "f\n");
+ }
+}
+
+static void pdf_write_text(pdf_state *state, gfx_node_t *node,
+ int last_was_text, int next_is_text)
+{
+ char tmp[30];
+ 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_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)
+ pdf_puts(s, "BT\n");
+ if (state->font_id != font->obj.id || node->size != state->font_size) {
+ state->font_id = font->obj.id;
+ state->font_size = node->size;
+ pdf_puts(s, "/F");
+ pdf_putint(s, font->obj.id);
+ pdf_puts(s, " ");
+ 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_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_puts(s, ") Tj\n");
+ if (!next_is_text)
+ pdf_puts(s, "ET\n");
+}
+
+static void pdf_write_content(pdf_state *state)
+{
+ gfx_node_t *node;
+ int last_was_text = 0, next_is_text;
+ for (node = state->canvas->firstnode; node; node = node->next) {
+ switch (node->type) {
+ case GFX_LINE:
+ case GFX_AREA:
+ pdf_write_linearea(state, node);
+ break;
+ case GFX_TEXT:
+ next_is_text = node->next && node->next->type == GFX_TEXT;
+ pdf_write_text(state, node, last_was_text, next_is_text);
+ break;
+ }
+ last_was_text = node->type == GFX_TEXT;
+ }
+}
+
+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->pages_obj);
+ pdf_init_dict(state, &state->page1_obj);
+ pdf_init_dict(state, &state->fontsdict_obj);
+ pdf_create_fonts(state);
+ if (state->has_failed)
+ return;
+ /* make stream last object in file */
+ pdf_init_object(state, &state->graph_stream);
+ state->graph_stream.is_stream = 1;
+}
+
+static void pdf_setup_document(pdf_state *state)
+{
+ /* 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");
+ /* CATALOG */
+ pdf_putsi(&state->catalog_obj, "/Type /Catalog\n");
+ pdf_putsi(&state->catalog_obj, "/Pages ");
+ pdf_putint(&state->catalog_obj, state->pages_obj.id);
+ pdf_puts(&state->catalog_obj, " 0 R\n");
+ /* PAGES */
+ pdf_putsi(&state->pages_obj, "/Type /Pages\n");
+ pdf_putsi(&state->pages_obj, "/Kids [");
+ pdf_putint(&state->pages_obj, state->page1_obj.id);
+ pdf_puts(&state->pages_obj, " 0 R]\n");
+ pdf_putsi(&state->pages_obj, "/Count 1\n");
+ /* PAGE 1 */
+ pdf_putsi(&state->page1_obj, "/Type /Page\n");
+ pdf_putsi(&state->page1_obj, "/Parent ");
+ pdf_putint(&state->page1_obj, state->pages_obj.id);
+ pdf_puts(&state->page1_obj, " 0 R\n");
+ pdf_putsi(&state->page1_obj, "/MediaBox [0 0 ");
+ pdf_putint(&state->page1_obj, state->page_width);
+ pdf_puts(&state->page1_obj, " ");
+ pdf_putint(&state->page1_obj, state->page_height);
+ pdf_puts(&state->page1_obj, "]\n");
+ pdf_putsi(&state->page1_obj, "/Contents ");
+ pdf_putint(&state->page1_obj, state->graph_stream.id);
+ pdf_puts(&state->page1_obj, " 0 R\n");
+ pdf_putsi(&state->page1_obj, "/Resources << /Font ");
+ pdf_putint(&state->page1_obj, state->fontsdict_obj.id);
+ pdf_puts(&state->page1_obj, " 0 R >>\n");
+}
+
+static void pdf_write_string_to_file(pdf_state *state, const char *text)
+{
+ fputs(text, state->fp);
+ state->pdf_file_pos += strlen(text);
+}
+
+static void pdf_write_buf_to_file(pdf_state *state, pdf_buffer *buf)
+{
+ char tmp[40];
+ buf->pdf_file_pos = state->pdf_file_pos;
+ if (buf->is_obj) {
+ snprintf(tmp, sizeof(tmp), "%d 0 obj\n", buf->id);
+ pdf_write_string_to_file(state, tmp);
+ }
+ if (buf->is_dict)
+ pdf_write_string_to_file(state, "<<\n");
+ if (buf->is_stream) {
+ snprintf(tmp, sizeof(tmp), "<< /Length %d >>\n", buf->current_size);
+ pdf_write_string_to_file(state, tmp);
+ pdf_write_string_to_file(state, "stream\n");
+ }
+ fwrite(buf->data, 1, buf->current_size, state->fp);
+ state->pdf_file_pos += buf->current_size;
+ if (buf->is_stream)
+ pdf_write_string_to_file(state, "endstream\n");
+ if (buf->is_dict)
+ pdf_write_string_to_file(state, ">>\n");
+ if (buf->is_obj)
+ pdf_write_string_to_file(state, "endobj\n");
+}
+
+static void pdf_write_to_file(pdf_state *state)
+{
+ pdf_buffer *buf = state->first_buffer;
+ int xref_pos;
+ state->pdf_file_pos = 0;
+ pdf_write_buf_to_file(state, &state->pdf_header);
+ while (buf) {
+ if (buf->is_obj)
+ pdf_write_buf_to_file(state, buf);
+ buf = buf->next_buffer;
+ }
+ xref_pos = state->pdf_file_pos;
+ fprintf(state->fp, "xref\n");
+ fprintf(state->fp, "%d %d\n", 0, state->last_obj_id + 1);
+ /* TOC lines must be exactly 20 bytes including \n */
+ fprintf(state->fp, "%010d %05d f\x20\n", 0, 65535);
+ for (buf = state->first_buffer; buf; buf = buf->next_buffer) {
+ if (buf->is_obj)
+ fprintf(state->fp, "%010d %05d n\x20\n", buf->pdf_file_pos, 0);
+ }
+ fprintf(state->fp, "trailer\n");
+ 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, ">>\n");
+ fprintf(state->fp, "startxref\n");
+ fprintf(state->fp, "%d\n", xref_pos);
+ fputs("%%EOF\n", state->fp);
+}
+
+static void pdf_free_resources(pdf_state *state)
+{
+ pdf_buffer *buf = state->first_buffer;
+ while (buf) {
+ free(buf->data);
+ buf->data = NULL;
+ buf->alloc_size = buf->current_size = 0;
+ buf = buf->next_buffer;
+ }
+ while (state->font_list) {
+ pdf_font *next = state->font_list->next;
+ free(state->font_list);
+ state->font_list = next;
+ }
+}
+
+int gfx_render_pdf (gfx_canvas_t *canvas,
+ art_u32 width, art_u32 height,
+ gfx_color_t background, FILE *fp){
+ struct pdf_state state;
+ memset(&state, 0, sizeof(pdf_state));
+ state.fp = fp;
+ state.canvas = canvas;
+ state.page_width = width;
+ state.page_height = height;
+ state.font_id = -1;
+ state.font_size = -1;
+ state.font_list = NULL;
+ state.linecap = -1;
+ state.linejoin = -1;
+ pdf_init_document(&state);
+ /*
+ pdf_set_color(&state, background);
+ fprintf(fp, "0 0 M 0 %d L %d %d L %d 0 L fill\n",
+ height, width, height, width);
+ */
+ if (!state.has_failed)
+ pdf_write_content(&state);
+ if (!state.has_failed)
+ pdf_setup_document(&state);
+ if (!state.has_failed)
+ pdf_write_to_file(&state);
+ pdf_free_resources(&state);
+ return state.has_failed ? -1 : 0;
+}
+
projects / rrdtool.git / blobdiff