/****************************************************************************
- * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
+ * 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 <png.h>
-#include <ft2build.h>
-#include FT_FREETYPE_H
-
-#include "rrd_gfx.h"
-#include "rrd_afm.h"
-
-/* lines are better drawn on the pixle than between pixles */
-#define LINEOFFSET 0.5
+# ifdef DEBUG
+# define RRDPRINTF(...) fprintf(stderr, __VA_ARGS__);
+# else
+# define RRDPRINTF(...)
+# endif /* DEBUG */
+#endif /* _MSC_VER */
-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->svp = NULL; /* svp */
- 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;
- 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;
-
- 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;
-
- node->points = 5;
- node->points_max = 5;
- node->color = color;
- node->path = vec;
+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;
- return node;
+ 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);
- 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 */
- gfx_new_line(canvas, x - 3, y + 0, x, y, 0.2, 0x00FF0000);
- gfx_new_line(canvas, x - 0, y + 3, x, y, 0.2, 0x00FF0000);
-#endif
- return node;
-}
+void gfx_add_point(
+ image_desc_t *im,
+ double x,
+ double y)
+{
+ cairo_t *cr = im->cr;
-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);
- default:
- return -1;
- }
+ gfx_area_fit(im, &x, &y);
+ cairo_line_to(cr, x, y);
}
-double gfx_get_text_width ( gfx_canvas_t *canvas,
- double start, char* font, double size,
- double tabwidth, char* text){
- switch (canvas->imgformat) {
- case IF_PNG:
- return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text);
- case IF_SVG: /* fall through */
- case IF_EPS:
- 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){
-
- FT_GlyphSlot slot;
- FT_UInt previous=0;
- FT_UInt glyph_index=0;
- FT_Bool use_kerning;
- int error;
- FT_Face face;
- FT_Library library=NULL;
- double text_width=0;
- 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;
-
- use_kerning = FT_HAS_KERNING(face);
- slot = face->glyph;
- for(;*text;text++) {
- previous = glyph_index;
- glyph_index = FT_Get_Char_Index( face, *text);
+/* 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;
- 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 ) {
- FT_Done_FreeType(library);
- return -1;
- }
- if (! previous) {
- text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
- }
- 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 */
- FT_Done_FreeType(library);
- return text_width;
-}
-
-static void gfx_libart_close_path(gfx_canvas_t *canvas,
- gfx_node_t *node, ArtVpath **vec)
+ 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);
+}
+
+void gfx_close_path(
+ image_desc_t *im)
{
- /* 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);
-}
+ cairo_t *cr = im->cr;
-static void gfx_round_scaled_coordinates(gfx_canvas_t *canvas,
- gfx_node_t *node, ArtVpath *vec)
-{
- while (vec->code != ART_END) {
- vec->x = floor(vec->x - LINEOFFSET + 0.5) + LINEOFFSET;
- vec->y = floor(vec->y - LINEOFFSET + 0.5) + LINEOFFSET;
- vec++;
- }
+ cairo_close_path(cr);
+ cairo_fill(cr);
}
-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 = 3;
- 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);
- FT_Init_FreeType( &library );
- while(node){
- switch (node->type) {
- 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(canvas, node, &vec);
- gfx_round_scaled_coordinates(canvas, node, 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,1,1);
- } else {
- svp = art_svp_from_vpath ( vec );
- }
- art_free(vec);
- art_rgb_svp_alpha (svp ,0,0, pys_width, pys_height,
- node->color, buffer, rowstride, NULL);
- art_free(svp);
- break;
- }
- case GFX_TEXT: {
- int error;
- float text_width=0.0, text_height = 0.0;
- unsigned char *text;
- art_u8 fcolor[3],falpha;
- FT_Face face;
- FT_GlyphSlot slot;
- FT_UInt previous=0;
- FT_UInt glyph_index=0;
- FT_Bool use_kerning;
-
- float pen_x = 0.0 , pen_y = 0.0;
- /* double x,y; */
- long ix,iy,iz;
-
- 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 ) break;
- use_kerning = FT_HAS_KERNING(face);
+/* 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)
+{
+ PangoLayout *layout = im->layout;
+ const PangoFontDescription *pfd;
+ cairo_t *cr = im->cr;
- 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;
- slot = face->glyph;
+ static double last_tabwidth = -1;
- 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 */
-
- 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_NULL: 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_NULL: break;
- }
- 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;
-
- }
- 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;
- buf_y *= rowstride;
- for (ix=0;ix < slot->bitmap.width;ix++){
- long buf_x = ix + (pen_x + 0.5) + (double)slot->bitmap_left ;
- art_u8 font_alpha;
-
- if (buf_x < 0 || buf_x >= pys_width) continue;
- buf_x *= bytes_per_pixel ;
- font_alpha = *(slot->bitmap.buffer + iy * slot->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));
- }
- }
- }
- pen_x += (double)slot->metrics.horiAdvance / 64.0;
- }
- }
+ /* 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);
}
- 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);
- art_free(node->svp);
- free(node->text);
- free(node->filename);
- art_free(node);
- node = next;
- }
- 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_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);
+ pango_layout_set_tabs(layout, tab_array);
+ pango_tab_array_free(tab_array);
}
+ pfd = pango_layout_get_font_description(layout);
- png_init_io(png_ptr, fp);
- png_set_IHDR (png_ptr, info_ptr,width, height,
- 8, PNG_COLOR_TYPE_RGB,
- PNG_INTERLACE_NONE,
- PNG_COMPRESSION_TYPE_DEFAULT,
- PNG_FILTER_TYPE_DEFAULT);
-
- text[0].key = "Software";
- text[0].text = "RRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch";
- text[0].compression = PNG_TEXT_COMPRESSION_NONE;
- png_set_text (png_ptr, info_ptr, text, 1);
-
- /* 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_destroy_write_struct(&png_ptr, &info_ptr);
- return 1;
-}
+ 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)));
-
-/* ------- 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";
+ cairo_new_path(cr);
+ cairo_set_source_rgba(cr, color.red, color.green, color.blue,
+ color.alpha);
+/* layout = pango_cairo_create_layout(cr); */
-static void svg_print_indent(FILE *fp)
-{
- int i;
- for (i = svg_indent - svg_single_line; i > 0; i--) {
- putc(' ', fp);
- putc(' ', fp);
- }
-}
-
-static void svg_start_tag(FILE *fp, const char *name)
-{
- svg_print_indent(fp);
- putc('<', fp);
- fputs(name, fp);
- svg_indent++;
-}
-
-static void svg_close_tag_single_line(FILE *fp)
-{
- svg_single_line++;
- putc('>', fp);
-}
-
-static void svg_close_tag(FILE *fp)
-{
- putc('>', fp);
- if (!svg_single_line)
- putc('\n', fp);
-}
-
-static void svg_end_tag(FILE *fp, const char *name)
-{
- /* name is NULL if closing empty-node tag */
- svg_indent--;
- if (svg_single_line)
- svg_single_line--;
- else if (name)
- svg_print_indent(fp);
- if (name != NULL) {
- fputs("</", fp);
- fputs(name, fp);
- } else {
- putc('/', fp);
- }
- svg_close_tag(fp);
-}
-
-static void svg_close_tag_empty_node(FILE *fp)
-{
- svg_end_tag(fp, NULL);
-}
-
-static void svg_write_text(FILE *fp, const char *text)
-{
- const unsigned char *p, *start, *last;
- unsigned int ch;
- p = (const unsigned char*)text;
- if (!p)
- return;
- /* trim leading spaces */
- while (*p == ' ')
- p++;
- start = p;
- /* trim trailing spaces */
- last = p - 1;
- while ((ch = *p) != 0) {
- if (ch != ' ')
- last = p;
- p++;
- }
- /* encode trimmed text */
- p = start;
- while (p <= last) {
- ch = *p++;
- ch = afm_host2unicode(ch); /* unsafe macro */
- switch (ch) {
- case '&': fputs("&", fp); break;
- case '<': fputs("<", fp); break;
- case '>': fputs(">", fp); break;
- case '"': fputs(""", fp); break;
- default:
- if (ch >= 127)
- fprintf(fp, "&#%d;", ch);
- else
- putc(ch, fp);
- }
- }
-}
-
-static void svg_write_number(FILE *fp, double d)
-{
- /* omit decimals if integer to reduce filesize */
- char buf[60], *p;
- snprintf(buf, sizeof(buf), "%.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;
- }
- 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_common_path_attributes(FILE *fp, gfx_node_t *node)
-{
- fputs(" stroke-width=\"", fp);
- svg_write_number(fp, node->size);
- fputs("\"", fp);
- svg_write_color(fp, node->color, "stroke");
- fputs(" fill=\"none\"", fp);
- if (node->dash_on > 0 && node->dash_off > 0) {
- fputs(" stroke-dasharray=\"", fp);
- svg_write_number(fp, node->dash_on);
- fputs(",", fp);
- svg_write_number(fp, node->dash_off);
- fputs("\"", fp);
- }
-}
+// pango_cairo_context_set_font_options(pango_context, im->font_options);
+// pango_cairo_context_set_resolution(pango_context, 100);
-static int svg_is_int_step(double a, double b)
-{
- double diff = fabs(a - b);
- return floor(diff) == diff;
-}
-
-static int svg_path_straight_segment(FILE *fp,
- double lastA, double currentA, double currentB,
- gfx_node_t *node,
- int segment_idx, int isx, char absChar, char relChar)
-{
- if (!svg_is_int_step(lastA, currentA)) {
- putc(absChar, fp);
- svg_write_number(fp, currentA);
- return 0;
- }
- if (segment_idx < node->points - 1) {
- ArtVpath *vec = node->path + segment_idx + 1;
- if (vec->code == ART_LINETO) {
- double nextA = (isx ? vec->x : vec->y) - LINEOFFSET;
- double nextB = (isx ? vec->y : vec->x) - LINEOFFSET;
- if (nextB == currentB
- && ((currentA >= lastA) == (nextA >= currentA))
- && svg_is_int_step(currentA, nextA)) {
- return 1; /* skip to next as it is a straight line */
- }
- }
- }
- putc(relChar, fp);
- svg_write_number(fp, currentA - lastA);
- return 0;
-}
-
-static void svg_path(FILE *fp, gfx_node_t *node, int multi)
-{
- int i;
- double lastX = 0, lastY = 0;
- /* for straight lines <path..> tags take less space than
- <line..> tags because of the efficient packing
- in the 'd' attribute */
- svg_start_tag(fp, "path");
- if (!multi)
- svg_common_path_attributes(fp, node);
- fputs(" d=\"", fp);
- /* specification of the 'd' attribute: */
- /* http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation */
- for (i = 0; i < node->points; i++) {
- ArtVpath *vec = node->path + i;
- double x = vec->x - LINEOFFSET;
- double y = vec->y - LINEOFFSET;
- switch (vec->code) {
- case ART_MOVETO_OPEN: /* fall-through */
- case ART_MOVETO:
- putc('M', fp);
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- break;
- case ART_LINETO:
- /* try optimize filesize by using minimal lineto commands */
- /* without introducing rounding errors. */
- if (x == lastX) {
- if (svg_path_straight_segment(fp, lastY, y, x, node, i, 0, 'V', 'v'))
- continue;
- } else if (y == lastY) {
- if (svg_path_straight_segment(fp, lastX, x, y, node, i, 1, 'H', 'h'))
- continue;
- } else {
- putc('L', fp);
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- }
- break;
- case ART_CURVETO: break; /* unsupported */
- case ART_END: break; /* nop */
- }
- lastX = x;
- lastY = y;
- }
- if (node->closed_path)
- fputs(" Z", fp);
- fputs("\"", fp);
- svg_close_tag_empty_node(fp);
-}
-
-static void svg_multi_path(FILE *fp, gfx_node_t **nodeR)
-{
- /* optimize for multiple paths with the same color, penwidth, etc. */
- int num = 1;
- gfx_node_t *node = *nodeR;
- gfx_node_t *next = node->next;
- while (next) {
- if (next->type != node->type
- || next->size != node->size
- || next->color != node->color
- || next->dash_on != node->dash_on
- || next->dash_off != node->dash_off)
- break;
- next = next->next;
- num++;
- }
- if (num == 1) {
- svg_path(fp, node, 0);
- return;
- }
- svg_start_tag(fp, "g");
- svg_common_path_attributes(fp, node);
- svg_close_tag(fp);
- while (num && node) {
- svg_path(fp, node, 1);
- if (!--num)
- break;
- node = node->next;
- *nodeR = node;
- }
- svg_end_tag(fp, "g");
-}
-
-static void svg_area(FILE *fp, gfx_node_t *node)
-{
- int i;
- double startX = 0, startY = 0;
- svg_start_tag(fp, "polygon");
- fputs(" ", fp);
- svg_write_color(fp, node->color, "fill");
- fputs(" points=\"", fp);
- for (i = 0; i < node->points; i++) {
- ArtVpath *vec = node->path + i;
- double x = vec->x - LINEOFFSET;
- double y = vec->y - LINEOFFSET;
- switch (vec->code) {
- case ART_MOVETO_OPEN: /* fall-through */
- case ART_MOVETO:
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- startX = x;
- startY = y;
- break;
- case ART_LINETO:
- if (i == node->points - 2
- && node->path[i + 1].code == ART_END
- && fabs(x - startX) < 0.001 && fabs(y - startY) < 0.001) {
- break; /* poly area always closed, no need for last point */
- }
- putc(' ', fp);
- svg_write_number(fp, x);
- putc(',', fp);
- svg_write_number(fp, y);
- break;
- case ART_CURVETO: break; /* unsupported */
- case ART_END: break; /* nop */
- }
- }
- fputs("\"", fp);
- svg_close_tag_empty_node(fp);
-}
-
-static void svg_text(FILE *fp, gfx_node_t *node)
-{
- double x = node->x - LINEOFFSET;
- double y = node->y - LINEOFFSET;
- if (node->angle != 0) {
- svg_start_tag(fp, "g");
- fputs(" transform=\"translate(", fp);
- svg_write_number(fp, x);
- fputs(",", fp);
- svg_write_number(fp, y);
- fputs(") rotate(", fp);
- svg_write_number(fp, node->angle);
- fputs(")\"", fp);
- x = y = 0;
- svg_close_tag(fp);
- }
- switch (node->valign) {
- case GFX_V_TOP: y += node->size; break;
- case GFX_V_CENTER: y += node->size / 2; 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-size=\"", fp);
- svg_write_number(fp, node->size);
- fputs("\"", fp);
- if (!svg_color_is_black(node->color))
- svg_write_color(fp, node->color, "fill");
- switch (node->halign) {
- case GFX_H_RIGHT: fputs(" text-anchor=\"end\"", fp); break;
- case GFX_H_CENTER: fputs(" text-anchor=\"middle\"", fp); break;
- case GFX_H_LEFT: break;
- case GFX_H_NULL: break;
- }
- svg_close_tag_single_line(fp);
- /* support for node->tabwidth missing */
- svg_write_text(fp, node->text);
- svg_end_tag(fp, "text");
- if (node->angle != 0)
- svg_end_tag(fp, "g");
-}
-
-int gfx_render_svg (gfx_canvas_t *canvas,
- art_u32 width, art_u32 height,
- gfx_color_t background, FILE *fp){
- gfx_node_t *node = canvas->firstnode;
- fputs(
-"<?xml version=\"1.0\" standalone=\"no\"?>\n"
-"<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\"\n"
-" \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
-"<!--\n"
-" SVG file created by RRDtool,\n"
-" Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.ch\n"
-"\n"
-" The width/height attributes in the outhermost svg node\n"
-" are just default sizes for the browser which is used\n"
-" if the svg file is openened directly without being\n"
-" embedded in an html file.\n"
-" The viewBox is the local coord system for rrdtool.\n"
-"-->\n", fp);
- svg_start_tag(fp, "svg");
- fputs(" width=\"", fp);
- svg_write_number(fp, width * canvas->zoom);
- fputs("\" height=\"", fp);
- svg_write_number(fp, height * canvas->zoom);
- fputs("\" x=\"0\" y=\"0\" viewBox=\"", fp);
- svg_write_number(fp, -LINEOFFSET);
- fputs(" ", fp);
- svg_write_number(fp, -LINEOFFSET);
- fputs(" ", fp);
- svg_write_number(fp, width - LINEOFFSET);
- fputs(" ", fp);
- svg_write_number(fp, height - LINEOFFSET);
- fputs("\" preserveAspectRatio=\"xMidYMid\"", fp);
- fprintf(fp, " font-family=\"%s\"", svg_default_font); /* default font */
- fputs(" stroke-linecap=\"round\" stroke-linejoin=\"round\"", fp);
- svg_close_tag(fp);
- svg_start_tag(fp, "rect");
- fprintf(fp, " x=\"0\" y=\"0\" width=\"%d\" height=\"%d\"", width, height);
- svg_write_color(fp, background, "fill");
- svg_close_tag_empty_node(fp);
- while (node) {
- switch (node->type) {
- case GFX_LINE:
- svg_multi_path(fp, &node);
- break;
- case GFX_AREA:
- svg_area(fp, node);
- break;
- case GFX_TEXT:
- svg_text(fp, node);
- }
- node = node->next;
- }
- svg_end_tag(fp, "svg");
- return 0;
-}
+/* pango_cairo_update_context(cr, pango_context); */
-/* ------- 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;
+ /* pango expects the string to be utf-8 encoded */
+ utf8_text = g_locale_to_utf8((const gchar *) text, -1, NULL, NULL, NULL);
-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;
-} eps_state;
+ /* 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);
-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;
+ g_free(utf8_text);
+ return layout;
}
-static int eps_add_font(eps_state *state, gfx_node_t *node)
+/* Size Text Node */
+double gfx_get_text_width(
+ image_desc_t *im,
+ double start,
+ PangoFontDescription *font_desc,
+ double tabwidth,
+ char *text)
{
- /* 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)
+ 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)
{
- 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++;
+ 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(ef->ps_font, state->fp);
- lineLen += nameLen;
- }
- fputs("\n", state->fp);
-}
+ 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;
+ }
+ 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);
-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)
+/* convert color */
+struct gfx_color_t gfx_hex_to_col(
+ long unsigned int color)
{
- gfx_node_t *node;
- fputs(
- "%!PS-Adobe-3.0 EPSF-3.0\n"
- "%%Creator: RRDtool 1.1.x, 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;
-}
+ struct gfx_color_t gfx_color;
-static void eps_write_linearea(eps_state *state, gfx_node_t *node)
-{
- int i;
- FILE *fp = state->fp;
- int useOffset = 0;
- eps_set_color(state, node->color);
- if (node->type == GFX_LINE) {
- if (state->linecap != 1) {
- fputs("1 setlinecap\n", fp);
- state->linecap = 1;
- }
- if (state->linejoin != 1) {
- fputs("1 setlinejoin\n", fp);
- state->linejoin = 1;
- }
- }
- 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);
- }
+ 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 eps_write_text(eps_state *state, gfx_node_t *node)
-{
- FILE *fp = state->fp;
- const unsigned char *p;
- const char *ps_font = afm_get_font_postscript_name(node->filename);
- char align = 'L';
- double x = node->x;
- double y = state->page_height - node->y, ydelta = 0;
- int lineLen = 0;
- eps_set_color(state, node->color);
- if (strcmp(ps_font, state->font) || node->size != state->font_size) {
- state->font = ps_font;
- state->font_size = node->size;
- svg_write_number(fp, state->font_size);
- fprintf(fp, " SetFont-%s\n", state->font);
- }
- fputs("(", fp);
- lineLen = 20;
- for (p = (const unsigned char*)node->text; *p; p++) {
- if (lineLen > 70) {
- fputs("\\\n", fp); /* backslash and \n */
- lineLen = 0;
- }
- switch (*p) {
- case '(':
- case ')':
- case '\\':
- case '\n':
- case '\r':
- case '\t':
- fputc('\\', fp);
- lineLen++;
- /* fall-through */
- default:
- if (*p >= 126)
- fprintf(fp, "\\%03o", *p);
- else
- fputc(*p, fp);
- lineLen++;
- }
- }
- fputs(") ", fp);
- switch(node->valign){
- case GFX_V_TOP: ydelta = -node->size; break;
- case GFX_V_CENTER: ydelta = -node->size / 3.0; break;
- case GFX_V_BOTTOM: break;
- case GFX_V_NULL: break;
- }
- if (node->angle == 0)
- y += ydelta;
- switch (node->halign) {
- case GFX_H_RIGHT: align = 'R'; break;
- case GFX_H_CENTER: align = 'C'; break;
- case GFX_H_LEFT: align= 'L'; break;
- case GFX_H_NULL: align= 'L'; break;
- }
- if (node->angle != 0) {
- fputs("\n", fp);
- fputs(" gsave ", fp);
- svg_write_number(fp, x);
- fputc(' ', fp);
- svg_write_number(fp, y);
- fputs(" translate ", fp);
- svg_write_number(fp, -node->angle);
- fputs(" rotate 0 ", fp);
- svg_write_number(fp, ydelta);
- fputs(" moveto ", fp);
- fprintf(fp, "Ta%c", align);
- fputs(" show grestore\n", fp);
- } else {
- svg_write_number(fp, x);
- fputc(' ', fp);
- svg_write_number(fp, y);
- fputs(" T", fp);
- fputc(align, fp);
- fputc('\n', fp);
- }
-}
+/* gridfit_lines */
-static int eps_write_content(eps_state *state)
+void gfx_line_fit(
+ image_desc_t *im,
+ double *x,
+ double *y)
{
- 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;
- 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;
+ cairo_t *cr = im->cr;
+ double line_width;
+ double line_height;
+
+ 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);
+}
+
+/* gridfit_areas */
+
+void gfx_area_fit(
+ image_desc_t *im,
+ double *x,
+ double *y)
+{
+ cairo_t *cr = im->cr;
+
+ if (!im->gridfit)
+ return;
+ cairo_user_to_device(cr, x, y);
+ *x = floor(*x);
+ *y = ceil(*y);
+ cairo_device_to_user(cr, x, y);
}
projects / rrdtool.git / blobdiff