added ttf support to pdf2pdf

1 files changed, 180 insertions, 41 deletions

diff --git a/lib/devices/pdf.c b/lib/devices/pdf.c
index f6df3f52..5ab55fa2 100644
--- a/lib/devices/pdf.c
+++ b/lib/devices/pdf.c
@@ -28,6 +28,7 @@
 #include <math.h>
 #include "../os.h"
 #include "../q.h"
+#include "../log.h"
 #include "../jpeg.h"
 #include "../types.h"
 #include "../mem.h"
@@ -35,15 +36,16 @@
 #include "../gfxdevice.h"
 #include "../gfxtools.h"
 #include "../gfximage.h"
+#include "../gfxfont.h"
 
 typedef struct _internal {
     PDF* p;
     
-    const char*config_pdfx;
     char config_addblankpages;
     double config_xpad;
     double config_ypad;
     int config_maxdpi;
+    int config_mindpi;
 
     int width,height;
     int num_pages;
@@ -52,12 +54,39 @@ typedef struct _internal {
     char*page_opts;
     double lastx,lasty;
     gfxfontlist_t*fontlist;
+
+    char has_matrix;
+    double m00, m01, m10, m11;
 } internal_t;
 
-int pdf_setparameter(gfxdevice_t*dev, const char*key, const char*value)
+static void set_matrix(internal_t*i, double m00, double m01, double m10, double m11)
 {
-    internal_t*i = (internal_t*)dev->internal;
-    return 0;
+    if(i->has_matrix) {
+	PDF_restore(i->p);
+    }
+    i->m00 = m00;
+    i->m01 = m01;
+    i->m10 = m10;
+    i->m11 = m11;
+
+    i->has_matrix = 1;
+    PDF_save(i->p);
+    PDF_setmatrix(i->p, m00, -m01, m10, -m11, 0, i->height);
+}
+static void reset_matrix(internal_t*i)
+{
+    set_matrix(i, 1.0, 0.0, 0.0, 1.0);
+}
+static void transform_back(internal_t*i, double x, double y, double *ox, double *oy)
+{
+    double det = i->m00*i->m11 - i->m10*i->m01;
+    if(!det) {
+	msg("<warning> Codependent text matrix");
+	*ox=*oy=0;
+	return;
+    }
+    *ox = (x*i->m11 - i->m10*y)/det;
+    *oy = (i->m00*y - x*i->m01)/det;
 }
 
 void pdf_startpage(gfxdevice_t*dev, int width, int height)
@@ -66,16 +95,54 @@ void pdf_startpage(gfxdevice_t*dev, int width, int height)
 
     if(!i->tempfile) {
 	i->tempfile = strdup(mktempname(0));
-	PDF_open_file(i->p, i->tempfile);
+
+	PDF_begin_document(i->p, i->tempfile, 0, "");
+	//PDF_set_value(i->p, "compress", 0);
 	PDF_set_parameter(i->p, "usercoordinates", "true");
 	PDF_set_parameter(i->p, "topdown", "true");
     }
 
-    PDF_begin_page(i->p, width, height);
+    int width_plus_pad = width+floor(i->config_xpad*2);
+    int height_plus_pad = height+floor(i->config_ypad*2);
+    PDF_begin_page_ext(i->p, width_plus_pad, height_plus_pad, i->page_opts);
+    PDF_set_value(i->p, "CropBox/llx", 0);
+    PDF_set_value(i->p, "CropBox/lly", 0);
+    PDF_set_value(i->p, "CropBox/urx", width_plus_pad);
+    PDF_set_value(i->p, "CropBox/ury", height_plus_pad);
+    if(i->config_xpad || i->config_ypad) {
+	PDF_set_value(i->p, "TrimBox/llx", i->config_xpad);
+	PDF_set_value(i->p, "TrimBox/lly", i->config_ypad);
+	PDF_set_value(i->p, "TrimBox/urx", i->config_xpad+width);
+	PDF_set_value(i->p, "TrimBox/ury", i->config_ypad+height);
+    }
+
     PDF_set_parameter(i->p, "fillrule", "evenodd");
+    i->width = width;
+    i->height = height;
+    i->num_pages++;
+
+    reset_matrix(i);
+}
+
+int pdf_setparameter(gfxdevice_t*dev, const char*key, const char*value)
+{
+    internal_t*i = (internal_t*)dev->internal;
+    if(!strcmp(key, "addblankpages")) {
+	i->config_addblankpages = atoi(value);
+    } else if(!strcmp(key, "maxdpi")) {
+	i->config_maxdpi = atoi(value);
+    } else if(!strcmp(key, "mindpi")) {
+	i->config_mindpi = atoi(value);
+    } else if(!strcmp(key, "xpad")) {
+	i->config_xpad = atof(value);
+    } else if(!strcmp(key, "ypad")) {
+	i->config_ypad = atof(value);
+    }
+    return 0;
 }
 
-static int mkline(gfxline_t*line, PDF*p, char fill)
+
+static int mkline(gfxline_t*line, PDF*p, double mx, double my, double scale, char fill)
 {
     double x=0,y=0;
     char first = 1;
@@ -88,9 +155,9 @@ static int mkline(gfxline_t*line, PDF*p, char fill)
     while(line) {
 	if(line->type == gfx_moveTo && (x!=line->x || y!=line->y || first)) {
 	    first = 0;
-	    PDF_moveto(p, line->x, line->y);
+	    PDF_moveto(p, line->x*scale+mx, line->y*scale+my);
 	} else if(line->type == gfx_lineTo) {
-	    PDF_lineto(p, line->x, line->y);
+	    PDF_lineto(p, line->x*scale+mx, line->y*scale+my);
 	    ret = 1;
 	} else {
 	    /* when converting a quadratic bezier to a cubic bezier, the
@@ -100,7 +167,9 @@ static int mkline(gfxline_t*line, PDF*p, char fill)
 	    double c1y = (y + line->sy*2)/3;
 	    double c2x = (line->x + line->sx*2)/3;
 	    double c2y = (line->y + line->sy*2)/3;
-	    PDF_curveto(p, c1x, c1y, c2x, c2y, line->x, line->y);
+	    PDF_curveto(p, c1x*scale+mx, c1y*scale+my, 
+		           c2x*scale+mx, c2y*scale+my, 
+			   line->x*scale+mx, line->y*scale+my);
 	    ret = 1;
 	}
 	x = line->x;
@@ -115,8 +184,9 @@ static int mkline(gfxline_t*line, PDF*p, char fill)
 void pdf_startclip(gfxdevice_t*dev, gfxline_t*line)
 {
     internal_t*i = (internal_t*)dev->internal;
+    reset_matrix(i);
     PDF_save(i->p);
-    if(mkline(line, i->p, 1))
+    if(mkline(line, i->p, i->config_xpad, i->config_ypad, 1.0, 1))
 	PDF_clip(i->p);
     else   
 	; // TODO: strictly speaking, an empty clip clears everything
@@ -132,28 +202,34 @@ void pdf_stroke(gfxdevice_t*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*co
     internal_t*i = (internal_t*)dev->internal;
     if(width<1e-6)
 	return;
+    reset_matrix(i);
     PDF_setlinewidth(i->p, width);
     PDF_setlinecap(i->p, cap_style==gfx_capButt?0:(cap_style==gfx_capRound?1:2));
     PDF_setlinejoin(i->p, joint_style==gfx_joinMiter?0:(joint_style==gfx_joinRound?1:2));
+    
     PDF_setrgbcolor_stroke(i->p, color->r/255.0, color->g/255.0, color->b/255.0);
+
     if(joint_style==gfx_joinMiter)
 	PDF_setmiterlimit(i->p, miterLimit);
-    if(mkline(line, i->p, 0))
+    if(mkline(line, i->p, i->config_xpad, i->config_ypad, 1.0, 0))
 	PDF_stroke(i->p);
 }
 
 void pdf_fill(gfxdevice_t*dev, gfxline_t*line, gfxcolor_t*color)
 {
     internal_t*i = (internal_t*)dev->internal;
+    reset_matrix(i);
     PDF_setrgbcolor_fill(i->p, color->r/255.0, color->g/255.0, color->b/255.0);
+    /*
+       pdf-x (pdf 1.3) doesn't support opacityfill
     if(color->a!=255) {
 	char opacityfill[80];
 	sprintf(opacityfill, "opacityfill %f", color->a/256.0);
 	int gstate = PDF_create_gstate(i->p, opacityfill);
 	PDF_set_gstate(i->p, gstate);
-    }
+    }*/
 	
-    if(mkline(line, i->p, 1)) {
+    if(mkline(line, i->p, i->config_xpad, i->config_ypad, 1.0, 1)) {
 	PDF_fill(i->p);
     }
 }
@@ -175,11 +251,6 @@ void pdf_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t
     double h = sqrt(matrix->m10*matrix->m10+matrix->m11*matrix->m11);
     double l1 = w*img->width;
     double l2 = h*img->height;
-    double r = atan2(matrix->m01, matrix->m00);
-
-    /* fit_image needs the lower left corner of the image */
-    double x = matrix->tx + matrix->m10*img->height;
-    double y = matrix->ty + matrix->m11*img->height;
 
     double dpi_x = 72.0 / w;
     double dpi_y = 72.0 / h;
@@ -193,6 +264,11 @@ void pdf_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t
 		img->width, img->height, dpi, l1, l2, newwidth, newheight, i->config_maxdpi);
 	img = rescaled_image;
     }
+    if(i->config_mindpi && dpi < i->config_mindpi && img->width>1 && img->height>1) {
+	msg("<error> Found image of size %dx%d with dpi %f, minimum allowed dpi is %d", 
+		img->width, img->height, dpi, i->config_mindpi);
+	exit(1);
+    }
 
     char tempfile[128];
     mktempname(tempfile);
@@ -231,8 +307,13 @@ void pdf_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t
     unlink(tempfile);
     
     char options[80];
-    sprintf(options, "boxsize {%f %f} fitmethod meet rotate %f", l1, l2, r*180/M_PI);
-    PDF_fit_image(i->p, imgid, x, y, options);
+    set_matrix(i, matrix->m00, matrix->m01, matrix->m10, matrix->m11);
+    /* an image's (0,0) is at the lower left corner */
+    double x=matrix->tx + i->config_xpad + matrix->m10*img->height;
+    double y=matrix->ty + i->config_ypad + matrix->m11*img->height;
+    double tx,ty;
+    transform_back(i, x, y, &tx, &ty);
+    PDF_place_image(i->p, imgid, tx, ty, 1.0);
     PDF_close_image(i->p, imgid);
 
     if(rescaled_image)
@@ -244,7 +325,8 @@ void pdf_fillgradient(gfxdevice_t*dev, gfxline_t*line, gfxgradient_t*gradient, g
     internal_t*i = (internal_t*)dev->internal;
 }
 
-static char type3 = 1;
+static const char type3 = 1;
+static const char ttf = 0;
 
 void pdf_addfont(gfxdevice_t*dev, gfxfont_t*font)
 {
@@ -265,7 +347,7 @@ void pdf_addfont(gfxdevice_t*dev, gfxfont_t*font)
 		fontname2[t*2+1] = 0;
 	    }
 
-	    PDF_begin_font(i->p, fontname2, l*2, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, "");
+	    PDF_begin_font(i->p, fontname2, l*2, 1.0, 0.0, 0.0, -1.0, 0.0, 0.0, "");
 	    int num = font->num_glyphs<256-32?font->num_glyphs:256-32;
 	    for(t=0;t<num;t++) {
 		gfxglyph_t*g = &font->glyphs[t];
@@ -273,8 +355,8 @@ void pdf_addfont(gfxdevice_t*dev, gfxfont_t*font)
 		char name[32];
 		sprintf(name, "chr%d", t+32);
 		PDF_encoding_set_char(i->p, fontname, t+32, name, 0);
-		PDF_begin_glyph(i->p, name, g->advance, bbox.xmin, bbox.ymin, bbox.xmax, bbox.ymax);
-		if(mkline(g->line, i->p, 1))
+		PDF_begin_glyph(i->p, name, g->advance, bbox.xmin/64.0, bbox.ymin/64.0, bbox.xmax/64.0, bbox.ymax/64.0);
+		if(mkline(g->line, i->p, 0, 0, 1.0/64.0, 1))
 		    PDF_fill(i->p);
 		PDF_end_glyph(i->p);
 	    }
@@ -283,6 +365,29 @@ void pdf_addfont(gfxdevice_t*dev, gfxfont_t*font)
 	    
 	    i->fontlist = gfxfontlist_addfont2(i->fontlist, font, (void*)(ptroff_t)fontid);
 	}
+    } else if(ttf) {
+	int fontid = 0;
+	if(!gfxfontlist_hasfont(i->fontlist, font)) {
+	    char fontname[32],filename[32],fontname2[64];
+	    static int fontnr = 1;
+	    sprintf(fontname, "font%d", fontnr);
+	    sprintf(filename, "font%d.ttf", fontnr);
+	    fontnr++;
+	    const char*old_id = font->id;
+	    font->id = fontname;
+	    gfxfont_save(font, filename);
+	    font->id=old_id;
+	   
+	    int l = strlen(font->id);
+	    int t;
+	    for(t=0;t<l+1;t++) {
+		fontname2[t*2+0] = fontname[t];
+		fontname2[t*2+1] = 0;
+	    }
+	    fontid = PDF_load_font(i->p, fontname2, l*2, "host", "");
+	    i->fontlist = gfxfontlist_addfont2(i->fontlist, font, (void*)(ptroff_t)fontid);
+	    unlink(fontname);
+	}
     }
 }
 
@@ -294,38 +399,54 @@ void pdf_drawchar(gfxdevice_t*dev, gfxfont_t*font, int glyphnr, gfxcolor_t*color
 	return;
 
     gfxglyph_t*glyph = &font->glyphs[glyphnr];
-    PDF_setrgbcolor_fill(i->p, color->r/255.0, color->g/255.0, color->b/255.0);
     char as_shape = 0;
-    if(!type3) as_shape=1;
-    if(glyphnr>256-32) as_shape=1;
-    if(fabs(matrix->m00 + matrix->m11) > 0.01) as_shape=1;
-    if(fabs(fabs(matrix->m01) + fabs(matrix->m10)) > 0.01) as_shape=1;
-    if(fabs(matrix->m00) < 1e-6) as_shape=1;
-
+    if(!type3 && !ttf) {msg("<warning> No type3 enabled. Drawing char %d as shape", glyphnr);as_shape=1;}
+    if(glyphnr>256-32) {msg("<warning> Drawing char %d as shape (not < 224)", glyphnr);as_shape=1;}
+	
     if(as_shape) {
+	reset_matrix(i);
+	PDF_setrgbcolor_fill(i->p, color->r/255.0, color->g/255.0, color->b/255.0);
 	gfxline_t*line2 = gfxline_clone(glyph->line);
 	gfxline_transform(line2, matrix);
-	if(mkline(line2, i->p, 1)) {
+	if(mkline(line2, i->p, i->config_xpad, i->config_ypad, 1.0, 1)) {
 	    PDF_fill(i->p);
 	}
 	gfxline_free(line2);
     } else {
 	assert(gfxfontlist_hasfont(i->fontlist, font));
 	int fontid = (int)(ptroff_t)gfxfontlist_getuserdata(i->fontlist, font->id);
-	PDF_setfont(i->p, fontid, matrix->m00);
+
+	gfxmatrix_t m = *matrix;
+	m.m00*=64;
+	m.m01*=64;
+	m.m10*=64;
+	m.m11*=64;
+
+	if(!(fabs(m.m00 - i->m00) < 1e-6 &&
+	     fabs(m.m01 - i->m01) < 1e-6 &&
+	     fabs(m.m10 - i->m10) < 1e-6 &&
+	     fabs(m.m11 - i->m11) < 1e-6)) {
+	    set_matrix(i, m.m00, m.m01, m.m10, m.m11);
+	}
+	double tx, ty;
+	transform_back(i, m.tx+i->config_xpad, m.ty+i->config_ypad, &tx, &ty);
+	
+	//PDF_setfont(i->p, fontid, 1.0/64.0); // downscaling is done in glyph itself
+	PDF_setfont(i->p, fontid, 1.0);
+	PDF_setrgbcolor_fill(i->p, color->r/255.0, color->g/255.0, color->b/255.0);
+
 	char name[32];
 	sprintf(name, "%c", glyphnr+32);
 
-	if(fabs(matrix->tx - i->lastx) > 0.001 || matrix->ty != i->lasty) {
-	    PDF_show_xy2(i->p, name, strlen(name), matrix->tx, matrix->ty);
+	if(fabs(tx - i->lastx) > 0.001 || ty != i->lasty) {
+	    PDF_show_xy2(i->p, name, strlen(name), tx, ty);
 	} else {
 	    PDF_show2(i->p, name, strlen(name));
 	}
 
-	i->lastx = matrix->tx + glyph->advance*matrix->m00;
-	i->lasty = matrix->ty;
+	i->lastx = tx + glyph->advance;
+	i->lasty = ty;
     }
-    return;
 }
 
 void pdf_drawlink(gfxdevice_t*dev, gfxline_t*line, const char*action)
@@ -336,6 +457,9 @@ void pdf_drawlink(gfxdevice_t*dev, gfxline_t*line, const char*action)
 void pdf_endpage(gfxdevice_t*dev)
 {
     internal_t*i = (internal_t*)dev->internal;
+    if(i->has_matrix) {
+	PDF_restore(i->p); i->has_matrix = 0;
+    }
     PDF_end_page(i->p);
 }
 
@@ -379,8 +503,21 @@ void* pdfresult_get(gfxresult_t*gfx, const char*name)
 gfxresult_t* pdf_finish(gfxdevice_t*dev)
 {
     internal_t*i = (internal_t*)dev->internal;
-    
-    PDF_close(i->p);
+
+    if(i->config_addblankpages) {
+	int mod = i->num_pages%i->config_addblankpages;
+	if(mod) {
+	    int count = i->config_addblankpages - mod;
+	    int t;
+	    for(t=0;t<count;t++) {
+		dev->startpage(dev, i->width, i->height);
+		dev->endpage(dev);
+	    }
+	}
+    }
+   
+    PDF_end_document(i->p, "");
+    //PDF_close(i->p);
     PDF_delete(i->p);
 
     gfxresult_t*result = (gfxresult_t*)malloc(sizeof(gfxresult_t));
@@ -419,8 +556,10 @@ void gfxdevice_pdf_init(gfxdevice_t*dev)
     dev->endpage = pdf_endpage;
     dev->finish = pdf_finish;
 
+    i->page_opts = "";
     i->lastx = -1e38;
     i->lasty = -1e38;
+    i->has_matrix = 0;
     i->p = PDF_new();
 }