/****************************************************************************
- * RRDtool 1.1.x Copyright Tobias Oetiker, 1997 - 2002
+ * RRDtool 1.2rc2 Copyright by Tobi Oetiker, 1997-2005
****************************************************************************
* rrd_gfx.c graphics wrapper for rrdtool
**************************************************************************/
#include <png.h>
#include <ft2build.h>
#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;
+};
+
+/* compute string bbox */
+static void compute_string_bbox(gfx_string string);
+
+/* create a freetype glyph string */
+gfx_string gfx_string_create ( FT_Face face,
+ const char *text, int rotation, double tabwidth);
+
+/* create a freetype glyph string */
+static void gfx_string_destroy ( gfx_string string );
+
static
gfx_node_t *gfx_new_node( gfx_canvas_t *canvas,enum gfx_en type){
gfx_node_t *node = art_new(gfx_node_t,1);
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;
}
}
+static void gfx_string_destroy ( gfx_string string ) {
+ unsigned int n;
+ if (string->glyphs) {
+ for (n=0; n<string->num_glyphs; ++n)
+ FT_Done_Glyph (string->glyphs[n].image);
+ free (string->glyphs);
+ }
+ free (string);
+}
+
+
double gfx_get_text_width ( gfx_canvas_t *canvas,
double start, char* font, double size,
- double tabwidth, char* text){
+ double tabwidth, char* text, int rotation){
switch (canvas->imgformat) {
case IF_PNG:
- return gfx_get_text_width_libart (canvas, start, font, size, tabwidth, text);
+ return gfx_get_text_width_libart (start, font, size, tabwidth, text, rotation);
case IF_SVG: /* fall through */
case IF_EPS:
case IF_PDF:
}
}
-double gfx_get_text_width_libart ( gfx_canvas_t *canvas,
+double gfx_get_text_width_libart (
double start, char* font, double size,
- double tabwidth, char* text){
+ double tabwidth, char* text, int rotation){
- FT_GlyphSlot slot;
- FT_UInt previous=0;
- FT_UInt glyph_index=0;
- FT_Bool use_kerning;
int error;
+ double text_width=0;
FT_Face face;
FT_Library library=NULL;
- double text_width=0;
+ gfx_string string;
+
FT_Init_FreeType( &library );
error = FT_New_Face( library, font, 0, &face );
if ( error ) return -1;
error = FT_Set_Char_Size(face, size*64,size*64, 100,100);
if ( error ) return -1;
- use_kerning = FT_HAS_KERNING(face);
- slot = face->glyph;
- for(;*text;text++) {
- previous = glyph_index;
- glyph_index = FT_Get_Char_Index( face, *text);
-
- if (use_kerning && previous && glyph_index){
- FT_Vector delta;
- FT_Get_Kerning( face, previous, glyph_index,
- 0, &delta );
- text_width += (double)delta.x / 64.0;
-
- }
- 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 */
+ string = gfx_string_create( face, text, rotation,tabwidth);
+ text_width = string->width;
+ gfx_string_destroy(string);
FT_Done_FreeType(library);
- return text_width;
+ return text_width/64;
}
-
-static void gfx_libart_close_path(gfx_canvas_t *canvas,
- gfx_node_t *node, ArtVpath **vec)
+
+static void gfx_libart_close_path(gfx_node_t *node, ArtVpath **vec)
{
/* libart must have end==start for closed paths,
even if using ART_MOVETO and not ART_MOVETO_OPEN
art_vpath_add_point (vec, &points, &points_max, ART_END, 0, 0);
}
-static void gfx_round_scaled_coordinates(gfx_canvas_t *canvas,
- gfx_node_t *node, ArtVpath *vec)
+static void gfx_round_scaled_coordinates(ArtVpath *vec)
{
while (vec->code != ART_END) {
vec->x = floor(vec->x - LINEOFFSET + 0.5) + LINEOFFSET;
}
}
+/* find bbox of a string */
+static void compute_string_bbox(gfx_string string) {
+ unsigned int n;
+ FT_BBox bbox;
+
+ bbox.xMin = bbox.yMin = 32000;
+ bbox.xMax = bbox.yMax = -32000;
+ for ( n = 0; n < string->num_glyphs; n++ ) {
+ FT_BBox glyph_bbox;
+ FT_Glyph_Get_CBox( string->glyphs[n].image, ft_glyph_bbox_gridfit,
+ &glyph_bbox );
+ if (glyph_bbox.xMin < bbox.xMin) {
+ bbox.xMin = glyph_bbox.xMin;
+ }
+ if (glyph_bbox.yMin < bbox.yMin) {
+ bbox.yMin = glyph_bbox.yMin;
+ }
+ if (glyph_bbox.xMax > bbox.xMax) {
+ bbox.xMax = glyph_bbox.xMax;
+ }
+ if (glyph_bbox.yMax > bbox.yMax) {
+ bbox.yMax = glyph_bbox.yMax;
+ }
+ }
+ if ( bbox.xMin > bbox.xMax ) {
+ bbox.xMin = 0;
+ bbox.yMin = 0;
+ bbox.xMax = 0;
+ bbox.yMax = 0;
+ }
+ string->bbox.xMin = bbox.xMin;
+ string->bbox.xMax = bbox.xMax;
+ string->bbox.yMin = bbox.yMin;
+ string->bbox.yMax = bbox.yMax;
+}
+
+/* create a free type glyph string */
+gfx_string gfx_string_create(FT_Face face,const char *text,
+ int rotation, double tabwidth)
+{
+
+ FT_GlyphSlot slot = face->glyph; /* a small shortcut */
+ FT_Bool use_kerning;
+ FT_UInt previous;
+ FT_Vector ft_pen;
+
+ gfx_string string;
+ gfx_char glyph; /* current glyph in table */
+ unsigned int n;
+ int error;
+ int gottab = 0;
+
+ ft_pen.x = 0; /* start at (0,0) !! */
+ ft_pen.y = 0;
+
+ string = (gfx_string) malloc (sizeof(struct gfx_string_s));
+ string->width = 0;
+ string->height = 0;
+ string->count = strlen (text);
+ string->glyphs = (gfx_char) calloc (string->count,sizeof(struct gfx_char_s));
+ string->num_glyphs = 0;
+ string->transform.xx = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
+ string->transform.xy = (FT_Fixed)(-sin(M_PI*(rotation)/180.0)*0x10000);
+ string->transform.yx = (FT_Fixed)( sin(M_PI*(rotation)/180.0)*0x10000);
+ string->transform.yy = (FT_Fixed)( cos(M_PI*(rotation)/180.0)*0x10000);
+
+ use_kerning = FT_HAS_KERNING(face);
+ previous = 0;
+ glyph = string->glyphs;
+ for (n=0; n<string->count; n++, glyph++) {
+ FT_Vector vec;
+ /* handle the tabs ...
+ have a witespace glyph inserted, but set its width such that the distance
+ of the new right edge is x times tabwidth from 0,0 where x is an integer. */
+ char letter = text[n];
+ gottab = 0;
+ if (letter == '\\' && n+1 < string->count && text[n+1] == 't'){
+ /* we have a tab here so skip the backslash and
+ set t to ' ' so that we get a white space */
+ gottab = 1;
+ n++;
+ letter = ' ';
+ }
+ if (letter == '\t'){
+ letter = ' ';
+ gottab = 1 ;
+ }
+ /* initialize each struct gfx_char_s */
+ glyph->index = 0;
+ glyph->pos.x = 0;
+ glyph->pos.y = 0;
+ glyph->image = NULL;
+
+ glyph->index = FT_Get_Char_Index( face, letter );
+
+ /* compute glyph origin */
+ if ( use_kerning && previous && glyph->index ) {
+ FT_Vector kerning;
+ FT_Get_Kerning (face, previous, glyph->index,
+ ft_kerning_default, &kerning);
+ ft_pen.x += kerning.x;
+ ft_pen.y += kerning.y;
+ }
+
+ /* load the glyph image (in its native format) */
+ /* for now, we take a monochrome glyph bitmap */
+ error = FT_Load_Glyph (face, glyph->index, FT_LOAD_DEFAULT);
+ if (error) {
+ fprintf (stderr, "couldn't load glyph: %c\n", letter);
+ continue;
+ }
+ error = FT_Get_Glyph (slot, &glyph->image);
+ if (error) {
+ fprintf (stderr, "couldn't get glyph from slot: %c\n", letter);
+ continue;
+ }
+ /* if we are in tabbing mode, we replace the tab with a space and shift the position
+ of the space so that its left edge is where the tab was supposed to land us */
+ if (gottab){
+ /* we are in gridfitting mode so the calculations happen in 1/64 pixles */
+ ft_pen.x = tabwidth*64.0 * (float)(1 + (long)(ft_pen.x / (tabwidth * 64.0))) - slot->advance.x;
+ }
+ /* store current pen position */
+ glyph->pos.x = ft_pen.x;
+ glyph->pos.y = ft_pen.y;
+
+
+ ft_pen.x += slot->advance.x;
+ ft_pen.y += slot->advance.y;
+
+ /* rotate glyph */
+ vec = glyph->pos;
+ FT_Vector_Transform (&vec, &string->transform);
+ error = FT_Glyph_Transform (glyph->image, &string->transform, &vec);
+ if (error) {
+ fprintf (stderr, "couldn't transform glyph\n");
+ continue;
+ }
+
+ /* convert to a bitmap - destroy native image */
+ error = FT_Glyph_To_Bitmap (&glyph->image, FT_RENDER_MODE_NORMAL, 0, 1);
+ if (error) {
+ fprintf (stderr, "couldn't convert glyph to bitmap\n");
+ continue;
+ }
+
+ /* increment number of glyphs */
+ previous = glyph->index;
+ string->num_glyphs++;
+ }
+/* printf ("number of glyphs = %d\n", string->num_glyphs);*/
+ compute_string_bbox( string );
+ /* the last character was a tab */
+ if (gottab) {
+ string->width = ft_pen.x;
+ } else {
+ string->width = string->bbox.xMax - string->bbox.xMin;
+ }
+ string->height = string->bbox.yMax - string->bbox.yMin;
+ return string;
+}
+
+
static int gfx_save_png (art_u8 *buffer, FILE *fp,
long width, long height, long bytes_per_pixel);
/* render grafics into png image */
+
int gfx_render_png (gfx_canvas_t *canvas,
art_u32 width, art_u32 height,
gfx_color_t background, FILE *fp){
switch (node->type) {
case GFX_LINE:
case GFX_AREA: {
- ArtVpath *vec;
+ ArtVpath *vec,*pvec;
double dst[6];
- ArtSVP *svp;
+ ArtSVP *svp,*usvp,*rsvp;
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);
+ gfx_libart_close_path(node, &vec);
+ gfx_round_scaled_coordinates(vec);
+ pvec = art_vpath_perturb(vec);
+ art_free(vec);
if(node->type == GFX_LINE){
- svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
+ svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
ART_PATH_STROKE_CAP_ROUND,
node->size*canvas->zoom,1,1);
} else {
- svp = art_svp_from_vpath ( vec );
+ svp = art_svp_from_vpath ( pvec );
}
- art_free(vec);
- art_rgb_svp_alpha (svp ,0,0, pys_width, pys_height,
- node->color, buffer, rowstride, NULL);
+ art_free(pvec);
+ usvp=art_svp_uncross(svp);
art_free(svp);
+ rsvp=art_svp_rewind_uncrossed(usvp,ART_WIND_RULE_ODDEVEN);
+ art_free(usvp);
+ art_rgb_svp_alpha (rsvp ,0,0, pys_width, pys_height,
+ node->color, buffer, rowstride, NULL);
+ art_free(rsvp);
break;
}
case GFX_TEXT: {
+ unsigned int n;
int error;
- float text_width=0.0, text_height = 0.0;
- unsigned char *text;
art_u8 fcolor[3],falpha;
FT_Face face;
- FT_GlyphSlot slot;
- FT_UInt previous=0;
- FT_UInt glyph_index=0;
- FT_Bool use_kerning;
+ gfx_char glyph;
+ gfx_string string;
+ FT_Vector vec; /* 26.6 */
float pen_x = 0.0 , pen_y = 0.0;
/* double x,y; */
0,
&face );
if ( error ) break;
- use_kerning = FT_HAS_KERNING(face);
error = FT_Set_Char_Size(face, /* handle to face object */
(long)(node->size*64),
if ( error ) break;
pen_x = node->x * canvas->zoom;
pen_y = node->y * canvas->zoom;
- slot = face->glyph;
-
- for(text=(unsigned char *)node->text;*text;text++) {
- previous = glyph_index;
- glyph_index = FT_Get_Char_Index( face, *text);
-
- if (use_kerning && previous && glyph_index){
- FT_Vector delta;
- FT_Get_Kerning( face, previous, glyph_index,
- 0, &delta );
- text_width += (double)delta.x / 64.0;
-
- }
- error = FT_Load_Glyph( face, glyph_index, 0 );
- if ( error ) break;
- if (previous == 0){
- pen_x -= (double)slot->metrics.horiBearingX / 64.0; /* adjust pos for first char */
- text_width -= (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
- }
- if ( text_height < (double)slot->metrics.horiBearingY / 64.0 ) {
- text_height = (double)slot->metrics.horiBearingY / 64.0;
- }
- text_width += (double)slot->metrics.horiAdvance / 64.0;
- }
- text_width -= (double)slot->metrics.horiAdvance / 64.0; /* remove last step */
- text_width += (double)slot->metrics.width / 64.0; /* add just char width */
- text_width += (double)slot->metrics.horiBearingX / 64.0; /* add just char width */
-
+
+ string = gfx_string_create (face, node->text, node->angle, node->tabwidth);
switch(node->halign){
- case GFX_H_RIGHT: pen_x -= text_width; break;
- case GFX_H_CENTER: pen_x -= text_width / 2.0; break;
- case GFX_H_LEFT: break;
- case GFX_H_NULL: break;
+ case GFX_H_RIGHT: vec.x = -string->bbox.xMax;
+ break;
+ case GFX_H_CENTER: vec.x = abs(string->bbox.xMax) >= abs(string->bbox.xMin) ?
+ -string->bbox.xMax/2:-string->bbox.xMin/2;
+ break;
+ case GFX_H_LEFT: vec.x = -string->bbox.xMin;
+ break;
+ case GFX_H_NULL: vec.x = 0;
+ break;
}
switch(node->valign){
- case GFX_V_TOP: pen_y += text_height; break;
- case GFX_V_CENTER: pen_y += text_height / 2.0; break;
- case GFX_V_BOTTOM: break;
- case GFX_V_NULL: break;
+ case GFX_V_TOP: vec.y = string->bbox.yMax;
+ break;
+ case GFX_V_CENTER: vec.y = abs(string->bbox.yMax) >= abs(string->bbox.yMin) ?
+ string->bbox.yMax/2:string->bbox.yMin/2;
+ break;
+ case GFX_V_BOTTOM: vec.y = 0;
+ break;
+ case GFX_V_NULL: vec.y = 0;
+ break;
}
-
- 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;
-
+ pen_x += vec.x/64;
+ pen_y += vec.y/64;
+ glyph = string->glyphs;
+ for(n=0; n<string->num_glyphs; ++n, ++glyph) {
+ int gr;
+ FT_Glyph image;
+ FT_BitmapGlyph bit;
+
+ /* 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;
}
- 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;
+
+ /* transform it */
+ vec = glyph->pos;
+ FT_Vector_Transform (&vec, &string->transform);
+
+ bit = (FT_BitmapGlyph) image;
+
+ gr = bit->bitmap.num_grays -1;
+ for (iy=0; iy < bit->bitmap.rows; iy++){
+ long buf_y = iy+(pen_y+0.5)-bit->top;
+ if (buf_y < 0 || buf_y >= (long)pys_height) continue;
buf_y *= rowstride;
- for (ix=0;ix < slot->bitmap.width;ix++){
- long buf_x = ix + (pen_x + 0.5) + (double)slot->bitmap_left ;
+ for (ix=0;ix < bit->bitmap.width;ix++){
+ long buf_x = ix + (pen_x + 0.5) + (double)bit->left ;
art_u8 font_alpha;
- if (buf_x < 0 || buf_x >= pys_width) continue;
+ if (buf_x < 0 || buf_x >= (long)pys_width) continue;
buf_x *= bytes_per_pixel ;
- font_alpha = *(slot->bitmap.buffer + iy * slot->bitmap.width + ix);
+ font_alpha = *(bit->bitmap.buffer + iy * bit->bitmap.width + ix);
font_alpha = (art_u8)((double)font_alpha / gr * falpha);
for (iz = 0; iz < 3; iz++){
art_u8 *orig = buffer + buf_y + buf_x + iz;
}
}
}
- pen_x += (double)slot->metrics.horiAdvance / 64.0;
+ FT_Done_Glyph (image);
}
+ gfx_string_destroy(string);
}
}
node = node->next;
text[0].compression = PNG_TEXT_COMPRESSION_NONE;
png_set_text (png_ptr, info_ptr, text, 1);
+ /* lets make this fast */
+ png_set_compression_level(png_ptr,1);
+ png_set_filter(png_ptr,PNG_FILTER_TYPE_BASE,PNG_NO_FILTERS);
+ /*
+ 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_destroy_write_struct(&png_ptr, &info_ptr);
svg_write_number(fp, x);
fputs("\" y=\"", fp);
svg_write_number(fp, y);
- if (strcmp(node->filename, svg_default_font))
+
+/* 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);
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"
+ "%%Creator: RRDtool 1.2rc2 Tobias Oetiker, http://tobi.oetiker.ch\n"
/* can't like weird chars here */
- "%%Title: (RRDTool output)\n"
+ "%%Title: (RRDtool output)\n"
"%%DocumentData: Clean7Bit\n"
"", state->fp);
fprintf(state->fp, "%%%%BoundingBox: 0 0 %d %d\n",
projects / rrdtool.git / blobdiff