/* lines are better drawn on the pixle than between pixles */
#define LINEOFFSET 0.5
+#define USE_PDF_FAKE_ALPHA 1
+#define USE_EPS_FAKE_ALPHA 1
+
typedef struct gfx_char_s *gfx_char;
struct gfx_char_s {
FT_UInt index; /* glyph index */
}
+/* ----- COMMON ROUTINES for pdf, svg and eps */
+#define min3(a, b, c) (a < b ? (a < c ? a : c) : (b < c ? b : c))
+#define max3(a, b, c) (a > b ? (a > c ? a : c) : (b > c ? b : c))
+
+#define PDF_CALC_DEBUG 0
+
+typedef struct pdf_point
+{
+ double x, y;
+} pdf_point;
+
+typedef struct
+{
+ double ascender, descender, baselineY;
+ pdf_point sizep, minp, maxp;
+ double x, y, tdx, tdy;
+ double r, cos_r, sin_r;
+ double ma, mb, mc, md, mx, my; /* pdf coord matrix */
+ double tmx, tmy; /* last 2 coords of text coord matrix */
+#if PDF_CALC_DEBUG
+ int debug;
+#endif
+} pdf_coords;
+
+#if PDF_CALC_DEBUG
+static void pdf_dump_calc(gfx_node_t *node, pdf_coords *g)
+{
+ fprintf(stderr, "PDF CALC =============================\n");
+ fprintf(stderr, " '%s' at %f pt\n", node->text, node->size);
+ fprintf(stderr, " align h = %s, v = %s, sizep = %f, %f\n",
+ (node->halign == GFX_H_RIGHT ? "r" :
+ (node->halign == GFX_H_CENTER ? "c" :
+ (node->halign == GFX_H_LEFT ? "l" : "N"))),
+ (node->valign == GFX_V_TOP ? "t" :
+ (node->valign == GFX_V_CENTER ? "c" :
+ (node->valign == GFX_V_BOTTOM ? "b" : "N"))),
+ g->sizep.x, g->sizep.y);
+ fprintf(stderr, " r = %f = %f, cos = %f, sin = %f\n",
+ g->r, node->angle, g->cos_r, g->sin_r);
+ fprintf(stderr, " ascender = %f, descender = %f, baselineY = %f\n",
+ g->ascender, g->descender, g->baselineY);
+ fprintf(stderr, " sizep: %f, %f\n", g->sizep.x, g->sizep.y);
+ fprintf(stderr, " minp: %f, %f maxp = %f, %f\n",
+ g->minp.x, g->minp.y, g->maxp.x, g->maxp.y);
+ fprintf(stderr, " x = %f, y = %f\n", g->x, g->y);
+ fprintf(stderr, " tdx = %f, tdy = %f\n", g->tdx, g->tdy);
+ fprintf(stderr, " GM = %f, %f, %f, %f, %f, %f\n",
+ g->ma, g->mb, g->mc, g->md, g->mx, g->my);
+ fprintf(stderr, " TM = %f, %f, %f, %f, %f, %f\n",
+ g->ma, g->mb, g->mc, g->md, g->tmx, g->tmy);
+}
+#endif
+
+#if PDF_CALC_DEBUG
+#define PDF_DD(x) if (g->debug) x;
+#else
+#define PDF_DD(x)
+#endif
+
+static void pdf_rotate(pdf_coords *g, pdf_point *p)
+{
+ double x2 = g->cos_r * p->x - g->sin_r * p->y;
+ double y2 = g->sin_r * p->x + g->cos_r * p->y;
+ PDF_DD( fprintf(stderr, " rotate(%f, %f) -> %f, %f\n", p->x, p->y, x2, y2))
+ p->x = x2;
+ p->y = y2;
+}
+
+
+static void pdf_calc(int page_height, gfx_node_t *node, pdf_coords *g)
+{
+ pdf_point a, b, c;
+#if PDF_CALC_DEBUG
+ /* g->debug = !!strstr(node->text, "RevProxy-1") || !!strstr(node->text, "08:00"); */
+ g->debug = !!strstr(node->text, "sekunder") || !!strstr(node->text, "Web");
+#endif
+ g->x = node->x;
+ g->y = page_height - node->y;
+ if (node->angle) {
+ g->r = 2 * M_PI * node->angle / 360.0;
+ g->cos_r = cos(g->r);
+ g->sin_r = sin(g->r);
+ } else {
+ g->r = 0;
+ g->cos_r = 1;
+ g->sin_r = 0;
+ }
+ g->ascender = afm_get_ascender(node->filename, node->size);
+ g->descender = afm_get_descender(node->filename, node->size);
+ g->sizep.x = afm_get_text_width(0, node->filename, node->size, node->tabwidth, node->text);
+ /* seems like libart ignores the descender when doing vertial-align = bottom,
+ so we do that too, to get labels v-aligning properly */
+ g->sizep.y = -g->ascender; /* + afm_get_descender(font->ps_font, node->size); */
+ g->baselineY = -g->ascender - g->sizep.y / 2;
+ a.x = g->sizep.x; a.y = g->sizep.y;
+ b.x = g->sizep.x; b.y = 0;
+ c.x = 0; c.y = g->sizep.y;
+ if (node->angle) {
+ pdf_rotate(g, &a);
+ pdf_rotate(g, &b);
+ pdf_rotate(g, &c);
+ }
+ g->minp.x = min3(a.x, b.x, c.x);
+ g->minp.y = min3(a.y, b.y, c.y);
+ g->maxp.x = max3(a.x, b.x, c.x);
+ g->maxp.y = max3(a.y, b.y, c.y);
+ /* The alignment parameters in node->valign and node->halign
+ specifies the alignment in the non-rotated coordinate system
+ (very unlike pdf/postscript), which complicates matters.
+ */
+ switch (node->halign) {
+ case GFX_H_RIGHT: g->tdx = -g->maxp.x; break;
+ case GFX_H_CENTER: g->tdx = -(g->maxp.x + g->minp.x) / 2; break;
+ case GFX_H_LEFT: g->tdx = -g->minp.x; break;
+ case GFX_H_NULL: g->tdx = 0; break;
+ }
+ switch(node->valign){
+ case GFX_V_TOP: g->tdy = -g->maxp.y; break;
+ case GFX_V_CENTER: g->tdy = -(g->maxp.y + g->minp.y) / 2; break;
+ case GFX_V_BOTTOM: g->tdy = -g->minp.y; break;
+ case GFX_V_NULL: g->tdy = 0; break;
+ }
+ g->ma = g->cos_r;
+ g->mb = g->sin_r;
+ g->mc = -g->sin_r;
+ g->md = g->cos_r;
+ g->mx = g->x + g->tdx;
+ g->my = g->y + g->tdy;
+ g->tmx = g->mx - g->ascender * g->mc;
+ g->tmy = g->my - g->ascender * g->md;
+ PDF_DD(pdf_dump_calc(node, g))
+}
+
/* ------- SVG -------
SVG reference:
http://www.w3.org/TR/SVG/
}
fputs("\"", fp);
if (opacity != 0xFF) {
- fprintf(fp, " stroke-opacity=\"");
+ fprintf(fp, " opacity=\"");
svg_write_number(fp, opacity / 255.0);
fputs("\"", fp);
}
static void svg_text(FILE *fp, gfx_node_t *node)
{
- double x = node->x - LINEOFFSET;
- double y = node->y - LINEOFFSET;
+ pdf_coords g;
+ /* as svg has 0,0 in top-left corner (like most screens) instead of
+ bottom-left corner like pdf and eps, we have to fake the coords
+ using offset and inverse sin(r) value */
+ int page_height = 1000;
+ pdf_calc(page_height, node, &g);
if (node->angle != 0) {
svg_start_tag(fp, "g");
- 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;
+ /* can't use svg_write_number as 2 decimals is far from enough to avoid
+ skewed text */
+ fprintf(fp, " transform=\"matrix(%f,%f,%f,%f,%f,%f)\"",
+ g.ma, -g.mb, -g.mc, g.md, g.tmx, page_height - g.tmy);
svg_close_tag(fp);
}
- 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 (!node->angle) {
+ fputs(" x=\"", fp);
+ svg_write_number(fp, g.tmx);
+ fputs("\" y=\"", fp);
+ svg_write_number(fp, page_height - g.tmy);
+ fputs("\"", fp);
+ }
/* if (strcmp(node->filename, svg_default_font))
fprintf(fp, " font-family=\"%s\"", node->filename);
*/
- fputs("\" font-family=\"Helvetica", fp);
+ 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);
static void eps_set_color(eps_state *state, gfx_color_t color)
{
+#if USE_EPS_FAKE_ALPHA
+ double a1, a2;
+#endif
+ /* gfx_color_t is RRGGBBAA */
+ if (state->color == color)
+ return;
+#if USE_EPS_FAKE_ALPHA
+ a1 = (color & 255) / 255.0;
+ a2 = 255 * (1 - a1);
+#define eps_color_calc(x) (int)( ((x) & 255) * a1 + a2)
+#else
+#define eps_color_calc(x) (int)( (x) & 255)
+#endif
/* gfx_color_t is RRGGBBAA */
if (state->color == color)
return;
fprintf(state->fp, "%d %d %d Rgb\n",
- (int)((color >> 24) & 255),
- (int)((color >> 16) & 255),
- (int)((color >> 8) & 255));
+ eps_color_calc(color >> 24),
+ eps_color_calc(color >> 16),
+ eps_color_calc(color >> 8));
state->color = color;
}
"/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"
+ "/T1 {gsave} bd\n"
+ "/T2 {concat 0 0 moveto show grestore} bd\n"
+ "/T {moveto show} bd\n"
"/Rgb { 255.0 div 3 1 roll\n"
" 255.0 div 3 1 roll \n"
" 255.0 div 3 1 roll setrgbcolor } bd\n"
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;
+ pdf_coords g;
+ pdf_calc(state->page_height, node, &g);
eps_set_color(state, node->color);
if (strcmp(ps_font, state->font) || node->size != state->font_size) {
state->font = ps_font;
svg_write_number(fp, state->font_size);
fprintf(fp, " SetFont-%s\n", state->font);
}
+ if (node->angle)
+ fputs("T1 ", fp);
fputs("(", fp);
lineLen = 20;
for (p = (const unsigned char*)node->text; *p; p++) {
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);
+ if (node->angle) {
+ /* can't use svg_write_number as 2 decimals is far from enough to avoid
+ skewed text */
+ fprintf(fp, ") [%f %f %f %f %f %f] T2\n",
+ g.ma, g.mb, g.mc, g.md, g.tmx, g.tmy);
} else {
- svg_write_number(fp, x);
- fputc(' ', fp);
- svg_write_number(fp, y);
- fputs(" T", fp);
- fputc(align, fp);
- fputc('\n', fp);
+ fputs(") ", fp);
+ svg_write_number(fp, g.tmx);
+ fputs(" ", fp);
+ svg_write_number(fp, g.tmy);
+ fputs(" T\n", fp);
}
}
/* ------- PDF -------
PDF references page:
- http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html
+ http://partners.adobe.com/public/developer/pdf/index_reference.html
*/
typedef struct pdf_buffer
static void pdf_set_color(pdf_buffer *buf, gfx_color_t color,
gfx_color_t *current_color, const char *op)
{
+#if USE_PDF_FAKE_ALPHA
+ double a1, a2;
+#endif
/* gfx_color_t is RRGGBBAA */
if (*current_color == color)
return;
- pdf_putnumber(buf, ((color >> 24) & 255) / 255.0);
+#if USE_PDF_FAKE_ALPHA
+ a1 = (color & 255) / 255.0;
+ a2 = 1 - a1;
+#define pdf_color_calc(x) ( ((x) & 255) / 255.0 * a1 + a2)
+#else
+#define pdf_color_calc(x) ( ((x) & 255) / 255.0)
+#endif
+ pdf_putnumber(buf, pdf_color_calc(color >> 24));
pdf_puts(buf, " ");
- pdf_putnumber(buf, ((color >> 16) & 255) / 255.0);
+ pdf_putnumber(buf, pdf_color_calc(color >> 16));
pdf_puts(buf, " ");
- pdf_putnumber(buf, ((color >> 8) & 255) / 255.0);
+ pdf_putnumber(buf, pdf_color_calc(color >> 8));
pdf_puts(buf, " ");
pdf_puts(buf, op);
pdf_puts(buf, "\n");
}
}
+
+static void pdf_write_matrix(pdf_state *state, gfx_node_t *node, pdf_coords *g, int useTM)
+{
+ char tmp[150];
+ pdf_buffer *s = &state->graph_stream;
+ if (node->angle == 0) {
+ pdf_puts(s, "1 0 0 1 ");
+ pdf_putnumber(s, useTM ? g->tmx : g->mx);
+ pdf_puts(s, " ");
+ pdf_putnumber(s, useTM ? g->tmy : g->my);
+ } else {
+ /* can't use svg_write_number as 2 decimals is far from enough to avoid
+ skewed text */
+ sprintf(tmp, "%f %f %f %f %f %f",
+ g->ma, g->mb, g->mc, g->md,
+ useTM ? g->tmx : g->mx,
+ useTM ? g->tmy : g->my);
+ pdf_puts(s, tmp);
+ }
+}
+
static void pdf_write_text(pdf_state *state, gfx_node_t *node,
int last_was_text, int next_is_text)
{
- char tmp[30];
+ pdf_coords g;
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_calc(state->page_height, node, &g);
+#if PDF_CALC_DEBUG
+ pdf_puts(s, "q % debug green box\n");
+ pdf_write_matrix(state, node, &g, 0);
+ pdf_puts(s, " cm\n");
+ pdf_set_fill_color(s, 0x90FF9000);
+ pdf_puts(s, "0 0.4 0 rg\n");
+ pdf_puts(s, "0 0 ");
+ pdf_putnumber(s, g.sizep.x);
+ pdf_puts(s, " ");
+ pdf_putnumber(s, g.sizep.y);
+ pdf_puts(s, " re\n");
+ pdf_puts(s, "f\n");
+ pdf_puts(s, "Q\n");
+#endif
pdf_set_fill_color(s, node->color);
- if (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)
+ if (PDF_CALC_DEBUG || !last_was_text)
pdf_puts(s, "BT\n");
if (state->font_id != font->obj.id || node->size != state->font_size) {
state->font_id = font->obj.id;
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_write_matrix(state, node, &g, 1);
pdf_puts(s, " Tm\n");
pdf_puts(s, "(");
for (p = (const unsigned char*)node->text; *p; p++) {
+ char tmp[30];
switch (*p) {
case '(':
case ')':
}
}
pdf_puts(s, ") Tj\n");
- if (!next_is_text)
+ if (PDF_CALC_DEBUG || !next_is_text)
pdf_puts(s, "ET\n");
}
projects / rrdtool.git / commitdiff