X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=src%2Frrd_gfx.c;h=c4236dec9f0b886621adc0babe18aff2be08549d;hp=fb9324040383c32ee6b554014e396cc222405d2b;hb=0cab41a011f053fa84ac481849380f69ded26147;hpb=554df7224e8b3fec9ec5981812b453c43072f150 diff --git a/src/rrd_gfx.c b/src/rrd_gfx.c index fb93240..c4236de 100644 --- a/src/rrd_gfx.c +++ b/src/rrd_gfx.c @@ -1,2245 +1,354 @@ /**************************************************************************** - * RRDtool 1.2.4 Copyright by Tobi Oetiker, 1997-2005 + * RRDtool 1.4.3 Copyright by Tobi Oetiker, 1997-2010 **************************************************************************** * rrd_gfx.c graphics wrapper for rrdtool **************************************************************************/ /* #define DEBUG */ -#ifdef DEBUG -# define DPRINT(x) (void)(printf x, printf("\n")) +/* stupid MSVC doesnt support variadic macros = no debug for now! */ +#ifdef _MSC_VER +# define RRDPRINTF() #else -# define DPRINT(x) -#endif -#include "rrd_tool.h" -#include -#include -#include FT_FREETYPE_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; -}; +# ifdef DEBUG +# define RRDPRINTF(...) fprintf(stderr, __VA_ARGS__); +# else +# define RRDPRINTF(...) +# endif /* DEBUG */ +#endif /* _MSC_VER */ -/* 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); - if (node == NULL) return NULL; - node->type = type; - node->color = 0x0; /* color of element 0xRRGGBBAA alpha 0xff is solid*/ - node->size =0.0; /* font size, line width */ - node->path = NULL; /* path */ - node->points = 0; - node->points_max =0; - 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; - node->next = NULL; - if (canvas->lastnode != NULL){ - canvas->lastnode->next = node; - } - if (canvas->firstnode == NULL){ - canvas->firstnode = node; - } - canvas->lastnode = node; - return node; -} +#include "rrd_tool.h" +#include "rrd_graph.h" -gfx_canvas_t *gfx_new_canvas (void) { - 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; - 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 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; - node = gfx_new_node(canvas,GFX_LINE); - 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[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; +void gfx_line( + image_desc_t *im, + double X0, + double Y0, + double X1, + double Y1, + double width, + gfx_color_t color) +{ + gfx_dashed_line(im, X0, Y0, X1, Y1, width, color, 0, 0); +} + +void gfx_dashed_line( + image_desc_t *im, + double X0, + double Y0, + double X1, + double Y1, + double width, + gfx_color_t color, + double dash_on, + double dash_off) +{ + cairo_t *cr = im->cr; + double dashes[2]; + double x = 0; + double y = 0; + + dashes[0] = dash_on; + dashes[1] = dash_off; + + cairo_save(cr); + cairo_new_path(cr); + cairo_set_line_width(cr, width); + gfx_line_fit(im, &x, &y); + gfx_line_fit(im, &X0, &Y0); + cairo_move_to(cr, X0, Y0); + gfx_line_fit(im, &X1, &Y1); + cairo_line_to(cr, X1, Y1); + if (dash_on > 0 || dash_off > 0) + cairo_set_dash(cr, dashes, 2, x); + cairo_set_source_rgba(cr, color.red, color.green, color.blue, + color.alpha); + cairo_stroke(cr); + cairo_restore(cr); } /* 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, - gfx_color_t color) { - - gfx_node_t *node; - ArtVpath *vec; - node = gfx_new_node(canvas,GFX_AREA); - 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[4].x=0; vec[4].y=0; - - node->points = 5; - node->points_max = 5; - node->color = color; - node->path = vec; - - return node; +void gfx_new_area( + image_desc_t *im, + double X0, + double Y0, + double X1, + double Y1, + double X2, + double Y2, + gfx_color_t color) +{ + cairo_t *cr = im->cr; + + cairo_new_path(cr); + gfx_area_fit(im, &X0, &Y0); + cairo_move_to(cr, X0, Y0); + gfx_area_fit(im, &X1, &Y1); + cairo_line_to(cr, X1, Y1); + gfx_area_fit(im, &X2, &Y2); + cairo_line_to(cr, X2, Y2); + cairo_set_source_rgba(cr, color.red, color.green, color.blue, + color.alpha); } /* 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; - node->points -= 2; - art_vpath_add_point (&(node->path), - &(node->points), - &(node->points_max), - ART_LINETO, - x,y); - art_vpath_add_point (&(node->path), - &(node->points), - &(node->points_max), - ART_LINETO, - X0,Y0); - art_vpath_add_point (&(node->path), - &(node->points), - &(node->points_max), - ART_END, - 0,0); - } else if (node->type == GFX_LINE) { - node->points -= 1; - art_vpath_add_point (&(node->path), - &(node->points), - &(node->points_max), - ART_LINETO, - x+LINEOFFSET,y+LINEOFFSET); - art_vpath_add_point (&(node->path), - &(node->points), - &(node->points_max), - ART_END, - 0,0); - - } else { - /* can only add point to areas and lines */ - return 1; - } - 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, - double x, double y, gfx_color_t color, - char* font, double size, - double tabwidth, double angle, - enum gfx_h_align_en h_align, - enum gfx_v_align_en v_align, - char* text){ - gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT); - - 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; -} - -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 start, char* font, double size, - double tabwidth, char* text, int rotation ){ - - int error; - double text_width=0; - FT_Face face; - FT_Library library=NULL; - 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) +void gfx_add_point( + image_desc_t *im, + double x, + double y) { - /* 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_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); - previous = 0; - glyph = string->glyphs; - for (n=0; ncount;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. */ - unsigned 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; - } - - /* 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) { - 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 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; + cairo_t *cr = im->cr; - /* 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, 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) { - fprintf (stderr, "couldn't convert glyph to bitmap\n"); - continue; - } - - /* increment number of glyphs */ - previous = glyph->index; - string->num_glyphs++; - n++; - - } -/* 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; + gfx_area_fit(im, &x, &y); + cairo_line_to(cr, x, y); } - -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, - 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 * 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 */ +/* add a point to a line or to an area */ +void gfx_add_rect_fadey( + image_desc_t *im, + double x1,double y1, + double x2,double y2, + double py, + gfx_color_t color1, + gfx_color_t color2, + double height) +{ + cairo_t *cr = im->cr; - /* 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) { - case GFX_LINE: - case GFX_AREA: { - ArtVpath *vec; - double dst[6]; - ArtSVP *svp; - art_affine_scale(dst,canvas->zoom,canvas->zoom); - vec = art_vpath_affine_transform(node->path,dst); - if (node->closed_path) - gfx_libart_close_path(node, &vec); - /* gfx_round_scaled_coordinates(vec); */ - /* pvec = art_vpath_perturb(vec); - art_free(vec); */ - if(node->type == GFX_LINE){ - svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND, - ART_PATH_STROKE_CAP_ROUND, - node->size*canvas->zoom,4,0.25); - } else { - svp = art_svp_from_vpath ( vec ); - /* this takes time and is unnecessary since we make - sure elsewhere that the areas are going clock-whise */ - /* svpt = art_svp_uncross( svp ); - art_svp_free(svp); - svp = art_svp_rewind_uncrossed(svpt,ART_WIND_RULE_NONZERO); - art_svp_free(svpt); - */ - } - art_free(vec); - /* this is from gnome since libart does not have this yet */ - 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; - art_u8 fcolor[4],falpha; - FT_Face face; - 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; - - fcolor[0] = node->color >> 24; - fcolor[1] = (node->color >> 16) & 0xff; - fcolor[2] = (node->color >> 8) & 0xff; - falpha = node->color & 0xff; - error = FT_New_Face( library, - (char *)node->filename, - 0, - &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*canvas->zoom), - (long)(100*canvas->zoom)); - if ( error ) break; - 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: 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: 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) { - 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); -*/ - 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; - } - -/* - 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); - font_alpha = (art_u8)((double)font_alpha / gr * falpha); - for (iz = 0; iz < 3; iz++){ - art_u8 *orig = buffer + buf_y + buf_x + iz; - *orig = (art_u8)((double)*orig / gr * ( gr - font_alpha) + - (double)fcolor[iz] / gr * (font_alpha)); - } - } - } -*/ - FT_Done_Glyph (image); - } - gfx_string_destroy(string); - } - } - node = node->next; - } - gfx_save_png(buffer,fp , pys_width,pys_height,bytes_per_pixel); - art_free(buffer); - FT_Done_FreeType( library ); - return 0; -} - -/* free memory used by nodes this will also remove memory required for - associated paths and svcs ... but not for text strings */ -int -gfx_destroy (gfx_canvas_t *canvas){ - gfx_node_t *next,*node = canvas->firstnode; - while(node){ - next = node->next; - art_free(node->path); - free(node->text); - free(node->filename); - art_free(node); - node = next; - } - art_free(canvas); - return 0; -} - -static int gfx_save_png (art_u8 *buffer, FILE *fp, long width, long height, long bytes_per_pixel){ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL; - int i; - png_bytep *row_pointers; - int rowstride = width * bytes_per_pixel; - png_text text[2]; - - if (fp == NULL) - return (1); - - png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,NULL); - if (png_ptr == NULL) - { - return (1); - } - row_pointers = (png_bytepp)png_malloc(png_ptr, - height*sizeof(png_bytep)); - - info_ptr = png_create_info_struct(png_ptr); - - if (info_ptr == NULL) - { - png_free(png_ptr,row_pointers); - png_destroy_write_struct(&png_ptr, (png_infopp)NULL); - return (1); - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - /* If we get here, we had a problem writing the file */ - png_destroy_write_struct(&png_ptr, &info_ptr); - return (1); - } - - png_init_io(png_ptr, fp); - png_set_IHDR (png_ptr, info_ptr,width, height, - 8, PNG_COLOR_TYPE_RGB_ALPHA, - PNG_INTERLACE_NONE, - PNG_COMPRESSION_TYPE_DEFAULT, - PNG_FILTER_TYPE_DEFAULT); - - text[0].key = "Software"; - text[0].text = "RRDtool, Tobias Oetiker , http://tobi.oetiker.ch"; - 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; -} - - -/* ------- 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("': 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 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) -{ - 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( -"\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); - 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; + cairo_new_path(cr); + gfx_area_fit(im, &x1, &y1); + gfx_area_fit(im, &x2, &y2); + cairo_line_to(cr, x1, y1); + cairo_line_to(cr, x1, y2); + cairo_line_to(cr, x2, y2); + cairo_line_to(cr, x2, y1); + cairo_close_path(cr); + cairo_pattern_t* p; + if (height < 0) { + p = cairo_pattern_create_linear(x1,y1,x2,y1+height); + } else if (height > 0) { + p = cairo_pattern_create_linear(x1,(y2+py)/2+height,x2,(y2+py)/2); + } else { + p = cairo_pattern_create_linear(x1,y1,x2,(y2+py)/2); + } + //cairo_pattern_t* p = cairo_pattern_create_linear(x1,py+50,x2,py); + cairo_pattern_add_color_stop_rgba(p, 1, color1.red,color1.green,color1.blue,color1.alpha); + cairo_pattern_add_color_stop_rgba(p, 0, color2.red,color2.green,color2.blue,color2.alpha); + cairo_set_source(cr, p); + cairo_pattern_destroy(p); + cairo_fill(cr); } -static int eps_add_font(eps_state *state, gfx_node_t *node) +void gfx_close_path( + image_desc_t *im) { - /* 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; -} + cairo_t *cr = im->cr; -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); + cairo_close_path(cr); + cairo_fill(cr); } -static void eps_define_fonts(eps_state *state) +/* create a text node */ +static PangoLayout *gfx_prep_text( + image_desc_t *im, + double x, + gfx_color_t color, + PangoFontDescription *font_desc, + double tabwidth, + const char *text) { - 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); - } -} + PangoLayout *layout = im->layout; + const PangoFontDescription *pfd; + cairo_t *cr = im->cr; -static int eps_prologue(eps_state *state) -{ - gfx_node_t *node; - fputs( - "%!PS-Adobe-3.0 EPSF-3.0\n" - "%%Creator: RRDtool 1.2.4 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 double last_tabwidth = -1; -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; + /* for performance reasons we might + want todo that only once ... tabs will always + be the same */ + long i; + long tab_count = strlen(text); + long tab_shift = fmod(x, tabwidth); + int border = im->text_prop[TEXT_PROP_LEGEND].size * 2.0; + + gchar *utf8_text; + + if (last_tabwidth < 0 || last_tabwidth != tabwidth){ + PangoTabArray *tab_array; + // fprintf(stderr,"t"); + last_tabwidth = tabwidth; + tab_array = pango_tab_array_new(tab_count, (gboolean) (1)); + for (i = 1; i <= tab_count; i++) { + pango_tab_array_set_tab(tab_array, + i, PANGO_TAB_LEFT, + tabwidth * i - tab_shift + border); + } + pango_layout_set_tabs(layout, tab_array); + pango_tab_array_free(tab_array); } - 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++; + pfd = pango_layout_get_font_description(layout); + + if (!pfd || !pango_font_description_equal (pfd,font_desc)){ + pango_layout_set_font_description(layout, font_desc); + } +// fprintf(stderr,"%s\n",pango_font_description_to_string(pango_layout_get_font_description(layout))); + + cairo_new_path(cr); + cairo_set_source_rgba(cr, color.red, color.green, color.blue, + color.alpha); +/* layout = pango_cairo_create_layout(cr); */ + +// pango_cairo_context_set_font_options(pango_context, im->font_options); +// pango_cairo_context_set_resolution(pango_context, 100); + +/* pango_cairo_update_context(cr, pango_context); */ + + + /* pango expects the string to be utf-8 encoded */ + utf8_text = g_locale_to_utf8((const gchar *) text, -1, NULL, NULL, NULL); + + /* In case of an error, i.e. utf8_text == NULL (locale settings messed + * up?), we fall back to a possible "invalid UTF-8 string" warning instead + * of provoking a failed assertion in libpango. */ + if (im->with_markup) + pango_layout_set_markup(layout, utf8_text ? utf8_text : text, -1); + else + pango_layout_set_text(layout, utf8_text ? utf8_text : text, -1); + + g_free(utf8_text); + return layout; +} + +/* Size Text Node */ +double gfx_get_text_width( + image_desc_t *im, + double start, + PangoFontDescription *font_desc, + double tabwidth, + char *text) +{ + PangoLayout *layout; + PangoRectangle log_rect; + gfx_color_t color = { 0, 0, 0, 0 }; + layout = gfx_prep_text(im, start, color, font_desc, tabwidth, text); + pango_layout_get_pixel_extents(layout, NULL, &log_rect); +/* g_object_unref(layout); */ + return log_rect.width; +} + +void gfx_text( + image_desc_t *im, + double x, + double y, + gfx_color_t color, + PangoFontDescription *font_desc, + double tabwidth, + double angle, + enum gfx_h_align_en h_align, + enum gfx_v_align_en v_align, + const char *text) +{ + PangoLayout *layout; + PangoRectangle log_rect; + cairo_t *cr = im->cr; + double sx = 0; + double sy = 0; + + cairo_save(cr); + cairo_translate(cr, x, y); +/* gfx_line(cr,-2,0,2,0,1,color); + gfx_line(cr,0,-2,0,2,1,color); */ + layout = gfx_prep_text(im, x, color, font_desc, tabwidth, text); + pango_layout_get_pixel_extents(layout, NULL, &log_rect); + cairo_rotate(cr, -angle * G_PI / 180.0); + sx = log_rect.x; + switch (h_align) { + case GFX_H_RIGHT: + sx -= log_rect.width; + break; + case GFX_H_CENTER: + sx -= log_rect.width / 2; + break; + case GFX_H_LEFT: + break; + case GFX_H_NULL: + break; } - } - 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; + sy = log_rect.y; + switch (v_align) { + case GFX_V_TOP: + break; + case GFX_V_CENTER: + sy -= log_rect.height / 2; + break; + case GFX_V_BOTTOM: + sy -= log_rect.height; + break; + case GFX_V_NULL: + 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; + pango_cairo_update_layout(cr, layout); + cairo_move_to(cr, sx, sy); + pango_cairo_show_layout(cr, layout); +/* g_object_unref(layout); */ + cairo_restore(cr); -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) +/* convert color */ +struct gfx_color_t gfx_hex_to_col( + long unsigned int color) { - 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; -} + struct gfx_color_t gfx_color; -static void pdf_puts(pdf_buffer *buf, const char *text) -{ - pdf_put(buf, text, strlen(text)); + gfx_color.red = 1.0 / 255.0 * ((color & 0xff000000) >> (3 * 8)); + gfx_color.green = 1.0 / 255.0 * ((color & 0x00ff0000) >> (2 * 8)); + gfx_color.blue = 1.0 / 255.0 * ((color & 0x0000ff00) >> (1 * 8)); + gfx_color.alpha = 1.0 / 255.0 * (color & 0x000000ff); + return gfx_color; } -static void pdf_indent(pdf_buffer *buf) -{ - pdf_puts(buf, "\t"); -} +/* gridfit_lines */ -static void pdf_putsi(pdf_buffer *buf, const char *text) +void gfx_line_fit( + image_desc_t *im, + double *x, + double *y) { - pdf_indent(buf); - pdf_puts(buf, text); -} + cairo_t *cr = im->cr; + double line_width; + double line_height; -static void pdf_putint(pdf_buffer *buf, int i) -{ - char tmp[20]; - sprintf(tmp, "%d", i); - pdf_puts(buf, tmp); + if (!im->gridfit) + return; + cairo_user_to_device(cr, x, y); + line_width = cairo_get_line_width(cr); + line_height = line_width; + cairo_user_to_device_distance(cr, &line_width, &line_height); + line_width = line_width / 2.0 - ceil(line_width / 2.0); + line_height = line_height / 2.0 - ceil(line_height / 2.0); + *x = floor(*x - 0.5) - line_width; + *y = ceil(*y + 0.5) + line_height; + cairo_device_to_user(cr, x, y); } -static void pdf_putnumber(pdf_buffer *buf, double d) -{ - char tmp[50]; - svg_format_number(tmp, sizeof(tmp), d); - pdf_puts(buf, tmp); -} +/* gridfit_areas */ -static void pdf_init_object(pdf_state *state, pdf_buffer *buf) +void gfx_area_fit( + image_desc_t *im, + double *x, + double *y) { - pdf_init_buffer(state, buf); - buf->id = ++state->last_obj_id; - buf->is_obj = 1; - buf->is_stream = 0; -} + cairo_t *cr = im->cr; -static void pdf_init_dict(pdf_state *state, pdf_buffer *buf) -{ - pdf_init_object(state, buf); - buf->is_dict = 1; + if (!im->gridfit) + return; + cairo_user_to_device(cr, x, y); + *x = floor(*x); + *y = ceil(*y); + cairo_device_to_user(cr, x, y); } - -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; -} -