X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=src%2Frrd_gfx.c;h=d01b90487a5bbb03edc074e0181b503fe460498c;hp=1a45439da3d0eb542967f9499cccee785962fb0b;hb=0dc5d6d50c0d95ba4f04b656358b26518d4ce854;hpb=b7ba62419191213693d0b47c441d65d3ef88a685 diff --git a/src/rrd_gfx.c b/src/rrd_gfx.c index 1a45439..d01b904 100644 --- a/src/rrd_gfx.c +++ b/src/rrd_gfx.c @@ -1,5 +1,5 @@ /**************************************************************************** - * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002 + * RRDtool 1.2.9 Copyright by Tobi Oetiker, 1997-2005 **************************************************************************** * rrd_gfx.c graphics wrapper for rrdtool **************************************************************************/ @@ -7,21 +7,54 @@ /* #define DEBUG */ #ifdef DEBUG -# define DPRINT(x) (void)(printf x, printf("\n")) +# define DPRINTF(x,...) fprintf(stderr, x, ## __VA_ARGS__); #else -# define DPRINT(x) +# define DPRINTF(x,...) #endif - +#include "rrd_tool.h" #include #include #include FT_FREETYPE_H -#include +#include FT_GLYPH_H #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 */ + 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; + int 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 ( gfx_canvas_t *canvas, FT_Face face, + const char *text, int rotation, double tabwidth, double size); + +/* 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); @@ -32,11 +65,12 @@ gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){ 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; @@ -55,14 +89,27 @@ gfx_canvas_t *gfx_new_canvas (void) { gfx_canvas_t *canvas = art_new(gfx_canvas_t,1); canvas->firstnode = NULL; canvas->lastnode = NULL; - return canvas; + canvas->imgformat = IF_PNG; /* we default to PNG output */ + canvas->interlaced = 0; + canvas->zoom = 1.0; + canvas->font_aa_threshold = -1.0; + canvas->aa_type = AA_NORMAL; + 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; @@ -70,23 +117,25 @@ gfx_node_t *gfx_new_line(gfx_canvas_t *canvas, 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; @@ -95,11 +144,11 @@ gfx_node_t *gfx_new_area (gfx_canvas_t *canvas, 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; @@ -108,60 +157,14 @@ gfx_node_t *gfx_new_area (gfx_canvas_t *canvas, return node; } -/* create an arc section (2*M_PI is full circle) */ -gfx_node_t *gfx_arc_sect (gfx_canvas_t *canvas, - double centerx, double centery, - double radiusx, double radiusy, - double start, double end, - gfx_color_t color) { - - gfx_node_t *node; - ArtVpath *vec; - int counter; - double position; - -/* 20 is too low, 100 is overkill */ -#define AMOUNT_OF_VECTORS 50 - - node = gfx_new_node(canvas,GFX_AREA); - if (node == NULL) return NULL; - vec = art_new(ArtVpath, AMOUNT_OF_VECTORS+4); - if (vec == NULL) return NULL; - - vec[0].code = ART_MOVETO; - vec[0].x = centerx; - vec[0].y = centery; - - for (counter=0;counter<=AMOUNT_OF_VECTORS;) { - position=start + counter*(end-start)/AMOUNT_OF_VECTORS; - - counter++; - vec[counter].code = ART_LINETO; - vec[counter].x = centerx + sin(position)*radiusx; - vec[counter].y = centery - cos(position)*radiusy; - } - - vec[AMOUNT_OF_VECTORS+2].code = ART_LINETO; - vec[AMOUNT_OF_VECTORS+2].x = centerx; - vec[AMOUNT_OF_VECTORS+2].y = centery; - - vec[AMOUNT_OF_VECTORS+3].code = ART_END; - - node->points = AMOUNT_OF_VECTORS+4; - node->points_max = AMOUNT_OF_VECTORS+4; - node->color = color; - node->path = vec; - - return node; -} /* add a point to a line or to an area */ int gfx_add_point (gfx_node_t *node, 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), @@ -172,7 +175,7 @@ int gfx_add_point (gfx_node_t *node, &(node->points), &(node->points_max), ART_LINETO, - x0,y0); + X0,Y0); art_vpath_add_point (&(node->path), &(node->points), &(node->points_max), @@ -198,7 +201,11 @@ int gfx_add_point (gfx_node_t *node, 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, @@ -209,92 +216,328 @@ 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; nnum_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 (canvas, 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 ( + gfx_canvas_t *canvas, double UNUSED(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( canvas, face, text, rotation, tabwidth, size ); + 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(gfx_canvas_t *canvas, FT_Face face,const char *text, + int rotation, double tabwidth, double size ) +{ + + FT_GlyphSlot slot = face->glyph; /* a small shortcut */ + FT_Bool use_kerning; + FT_UInt previous; + FT_Vector ft_pen; + + gfx_string string = (gfx_string) malloc (sizeof(struct gfx_string_s)); + + gfx_char glyph; /* current glyph in table */ + int n; + int error; + int gottab = 0; + +#ifdef HAVE_MBSTOWCS + wchar_t *cstr; + size_t clen = strlen(text)+1; + cstr = malloc(sizeof(wchar_t) * clen); /* yes we are allocating probably too much here, I know */ + string->count=mbstowcs(cstr,text,clen); + if ( string->count == -1){ + string->count=mbstowcs(cstr,"Enc-Err",6); + } +#else + char *cstr = strdup(text); + string->count = strlen (text); +#endif + + ft_pen.x = 0; /* start at (0,0) !! */ + ft_pen.y = 0; + + + string->width = 0; + string->height = 0; + 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; ncount;glyph++,n++) { + 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. */ + unsigned int letter = cstr[n]; + + gottab = 0; + if (letter == '\\' && n+1 < string->count && cstr[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, size > canvas->font_aa_threshold ? + canvas->aa_type == AA_NORMAL ? FT_LOAD_TARGET_NORMAL : + canvas->aa_type == AA_LIGHT ? FT_LOAD_TARGET_LIGHT : + FT_LOAD_TARGET_MONO : FT_LOAD_TARGET_MONO); + if (error) { + DPRINTF("couldn't load glyph: %c\n", letter) + continue; + } + error = FT_Get_Glyph (slot, &glyph->image); + if (error) { + DPRINTF("couldn't get glyph %c from slot %d\n", letter, (int)slot) + continue; + } + /* 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; } - if (! previous) { - text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */ + /* 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) { + DPRINTF("couldn't transform glyph id %d\n", letter) + continue; } - text_width += (double)slot->metrics.horiAdvance / 64.0; + + /* convert to a bitmap - destroy native image */ + error = FT_Glyph_To_Bitmap (&glyph->image, size > canvas->font_aa_threshold ? + canvas->aa_type == AA_NORMAL ? FT_RENDER_MODE_NORMAL : + canvas->aa_type == AA_LIGHT ? FT_RENDER_MODE_LIGHT : + FT_RENDER_MODE_MONO : FT_RENDER_MODE_MONO, 0, 1); + if (error) { + DPRINTF("couldn't convert glyph id %d to bitmap\n", letter) + continue; + } + + /* 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; + free(cstr); +/* 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 = art_new (gfx_color_t, pys_width*pys_height); + art_u8 *buffer = (art_u8 *)buffp; + unsigned long i; + for (i=0;itype) { @@ -303,35 +546,46 @@ int gfx_render_png (gfx_canvas_t *canvas, ArtVpath *vec; double dst[6]; ArtSVP *svp; - art_affine_scale(dst,zoom,zoom); + 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, 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 ( vec ); + /* 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); - art_rgb_svp_alpha (svp ,0,0, pys_width, pys_height, - node->color, buffer, rowstride, NULL); - art_free(svp); + /* 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; @@ -341,84 +595,138 @@ int gfx_render_png (gfx_canvas_t *canvas, (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 (canvas, face, node->text, node->angle, node->tabwidth, node->size); 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; nnum_glyphs; n++, glyph++) { + int gr; + FT_Glyph image; + FT_BitmapGlyph bit; + /* long buf_x,comp_n; */ + /* make copy to transform */ + if (! glyph->image) { + DPRINTF("no image\n") + continue; + } + error = FT_Glyph_Copy (glyph->image, &image); + if (error) { + DPRINTF("couldn't copy image\n") + continue; + } + + /* transform it */ + vec = glyph->pos; + FT_Vector_Transform (&vec, &string->transform); - 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; - + 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); +*/ + switch ( bit->bitmap.pixel_mode ) { + case FT_PIXEL_MODE_GRAY: + 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.pitch + 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); + } + } + } + break; + + case FT_PIXEL_MODE_MONO: + 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 ; + + if (buf_x < 0 || buf_x >= (long)pys_width) continue; + buf_x *= bytes_per_pixel ; + if ( (fcolor[3] = falpha * ((*(bit->bitmap.buffer + iy * bit->bitmap.pitch + ix/8) >> (7 - (ix % 8))) & 1)) > 0 ) + art_rgba_rgba_composite(buffer + buf_y + buf_x ,fcolor,1); + } + } + break; + + default: + rrd_set_error("unknown freetype pixel mode: %d", bit->bitmap.pixel_mode); + break; } - 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; @@ -427,8 +735,10 @@ int gfx_render_png (gfx_canvas_t *canvas, } } } - pen_x += (double)slot->metrics.horiAdvance / 64.0; +*/ + FT_Done_Glyph (image); } + gfx_string_destroy(string); } } node = node->next; @@ -447,12 +757,12 @@ gfx_destroy (gfx_canvas_t *canvas){ 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; } @@ -479,6 +789,7 @@ static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, lon if (info_ptr == NULL) { + png_free(png_ptr,row_pointers); png_destroy_write_struct(&png_ptr, (png_infopp)NULL); return (1); } @@ -492,7 +803,7 @@ static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, lon 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); @@ -502,14 +813,1604 @@ 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 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); */ + /* + 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; } + + +/* ----- 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 = "-dummy-"; +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("': 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, " 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 tags take less space than + 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) +{ + 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"); + /* 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); + } + svg_start_tag(fp, "text"); + 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"); + 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; + /* 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( +"\n" +"\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); + node = canvas->firstnode; + 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) +{ +#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", + eps_color_calc(color >> 24), + eps_color_calc(color >> 16), + eps_color_calc(color >> 8)); + 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 " PACKAGE_VERSION " 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" + "/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" + "", 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 char *p; + const char *ps_font = afm_get_font_postscript_name(node->filename); + 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; + state->font_size = node->size; + svg_write_number(fp, state->font_size); + fprintf(fp, " SetFont-%s\n", state->font); + } + if (node->angle) + fputs("T1 ", fp); + fputs("(", fp); + lineLen = 20; + 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 (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': + fputs("\\t", fp); + break; + default: + if (ch >= 126 || ch < 32) { + fprintf(fp, "\\%03o", ch); + lineLen += 3; + } else { + fputc(ch, fp); + } + } + p++; + } + 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 { + fputs(") ", fp); + svg_write_number(fp, g.tmx); + fputs(" ", fp); + svg_write_number(fp, g.tmy); + fputs(" T\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; + state.line_width = 1; + 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/public/developer/pdf/index_reference.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 info_obj, 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_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); + 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) +{ +#if USE_PDF_FAKE_ALPHA + double a1, a2; +#endif + /* gfx_color_t is RRGGBBAA */ + if (*current_color == color) + return; +#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, pdf_color_calc(color >> 16)); + pdf_puts(buf, " "); + pdf_putnumber(buf, pdf_color_calc(color >> 8)); + 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_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) +{ + pdf_coords g; + pdf_buffer *s = &state->graph_stream; + pdf_font *font = pdf_find_font(state, node); + if (font == NULL) { + rrd_set_error("font disappeared"); + state->has_failed = 1; + return; + } + 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 (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; + 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"); + } + pdf_write_matrix(state, node, &g, 1); + pdf_puts(s, " Tm\n"); + pdf_puts(s, "("); + pdf_put_string_contents(s, node->text); + pdf_puts(s, ") Tj\n"); + if (PDF_CALC_DEBUG || !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->info_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) +{ + const char *creator = "RRDtool " PACKAGE_VERSION " 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 "); + 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, "\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); + 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 UNUSED(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; +} +