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DEFINITIONS
This source file includes following definitions.
- dbg
- gfxline_isRect
- transformgfxline
- rescale_setparameter
- rescale_startpage
- rescale_startclip
- rescale_endclip
- rescale_stroke
- rescale_fill
- rescale_fillbitmap
- rescale_fillgradient
- rescale_addfont
- rescale_drawchar
- rescale_drawlink
- rescale_endpage
- rescale_finish
- gfxdevice_rescale_init
- gfxdevice_rescale_setzoom
- gfxdevice_rescale_setdevice
- gfxdevice_rescale_new
/* rescale.c
Part of the swftools package.
Copyright (c) 2006 Matthias Kramm <kramm@quiss.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#ifndef WIN32
#include <unistd.h>
#endif
#include <memory.h>
#include <math.h>
#include <string.h>
#include "rescale.h"
#include "../types.h"
#include "../mem.h"
#include "../gfxdevice.h"
#include "../gfxtools.h"
typedef struct _internal {
gfxdevice_t*out;
int origwidth;
int origheight;
int targetwidth;
int targetheight;
int centerx, centery;
gfxmatrix_t matrix;
double zoomwidth;
int keepratio;
} internal_t;
static int verbose = 1;
static void dbg(char*format, ...)
{
if(!verbose)
return;
char buf[1024];
int l;
va_list arglist;
va_start(arglist, format);
vsnprintf(buf, sizeof(buf)-1, format, arglist);
va_end(arglist);
l = strlen(buf);
while(l && buf[l-1]=='\n') {
buf[l-1] = 0;
l--;
}
printf("(device-rescale) %s\n", buf);
fflush(stdout);
}
char gfxline_isRect(gfxline_t*line)
{
return 1;
if(!line)
return 0;
double x1=line->x,y1=line->x,x2=line->x,y2=line->y;
int nx1=0,nx2=0,ny1=0,ny2=0;
line = line->next;
while(line) {
if(line->type != gfx_lineTo)
return 0;
if(line->x < x1) {
x1 = line->x;
nx1++;
} else if(line->y < y1) {
y1 = line->y;
ny1++;
} else if(line->x > x2) {
x2 = line->x;
nx2++;
} else if(line->y > y1) {
y2 = line->y;
ny2++;
}
line = line->next;
}
return (nx1+nx2)==1 && (ny1+ny2)==1;
}
gfxline_t*transformgfxline(internal_t*i, gfxline_t*line)
{
/* special case: transformed rectangle
if(gfxline_isRect(line)) {
gfxbbox_t bbox = gfxline_getbbox(line);
if(fabs(bbox.xmin)<0.1 && fabs(bbox.ymin)<0.1 &&
fabs(bbox.ymax-i->origwidth)<0.1 && fabs(bbox.ymax-i->origheight)<0.1) {
gfxline_t r[5];
r[0].x = 0; r[0].y = 0; r[0].type = gfx_moveTo;r[0].next = &r[1];
r[1].x = i->targetwidth;r[1].y = 0; r[1].type = gfx_lineTo;r[1].next = &r[2];
r[2].x = i->targetwidth;r[2].y = i->targetheight;r[2].type = gfx_lineTo;r[2].next = &r[3];
r[3].x = 0; r[3].y = i->targetheight;r[3].type = gfx_lineTo;r[3].next = &r[4];
r[4].x = 0; r[4].y = 0; r[4].type = gfx_lineTo;r[4].next = 0;
return gfxline_clone(r);
}
} */
gfxline_t*line2 = gfxline_clone(line);
gfxline_transform(line2, &i->matrix);
return line2;
}
int rescale_setparameter(gfxdevice_t*dev, const char*key, const char*value)
{
internal_t*i = (internal_t*)dev->internal;
if(!strcmp(key, "keepratio")) {
i->keepratio = atoi(value);
return 1;
} else if(!strcmp(key, "centerx")) {
i->centerx = atoi(value);
return 1;
} else if(!strcmp(key, "centery")) {
i->centery = atoi(value);
return 1;
} else {
if(i->out) {
return i->out->setparameter(i->out,key,value);
} else {
return 0;
}
}
}
void rescale_startpage(gfxdevice_t*dev, int width, int height)
{
internal_t*i = (internal_t*)dev->internal;
i->origwidth = width;
i->origheight = height;
if(i->targetwidth || i->targetheight) {
int targetwidth = i->targetwidth;
if(!targetwidth)
targetwidth = width*i->targetheight/height;
int targetheight = i->targetheight;
if(!targetheight)
targetheight = height*i->targetwidth/width;
if(i->keepratio) {
double rx = (double)targetwidth / (double)width;
double ry = (double)targetheight / (double)height;
if(rx<ry) {
i->matrix.m00 = rx;
i->matrix.m11 = rx;
i->matrix.tx = 0;
if(i->centery) {
i->matrix.ty = (targetheight - height*rx) / 2;
}
} else {
i->matrix.m00 = ry;
i->matrix.m11 = ry;
if(i->centerx) {
i->matrix.tx = (targetwidth - width*ry) / 2;
}
i->matrix.ty = 0;
}
} else {
i->matrix.m00 = (double)targetwidth / (double)width;
i->matrix.m11 = (double)targetheight / (double)height;
}
i->zoomwidth = sqrt(i->matrix.m00*i->matrix.m11);
i->out->startpage(i->out,targetwidth,targetheight);
} else {
i->out->startpage(i->out,(int)(width*i->matrix.m00),(int)(height*i->matrix.m11));
}
}
void rescale_startclip(gfxdevice_t*dev, gfxline_t*line)
{
internal_t*i = (internal_t*)dev->internal;
gfxline_t*line2 = transformgfxline(i, line);
i->out->startclip(i->out,line2);
gfxline_free(line2);
}
void rescale_endclip(gfxdevice_t*dev)
{
internal_t*i = (internal_t*)dev->internal;
i->out->endclip(i->out);
}
void rescale_stroke(gfxdevice_t*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit)
{
internal_t*i = (internal_t*)dev->internal;
gfxline_t*line2 = transformgfxline(i, line);
i->out->stroke(i->out, line2, width*i->zoomwidth, color, cap_style, joint_style, miterLimit);
gfxline_free(line2);
}
void rescale_fill(gfxdevice_t*dev, gfxline_t*line, gfxcolor_t*color)
{
internal_t*i = (internal_t*)dev->internal;
gfxline_t*line2 = transformgfxline(i, line);
i->out->fill(i->out, line2, color);
gfxline_free(line2);
}
void rescale_fillbitmap(gfxdevice_t*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*matrix, gfxcxform_t*cxform)
{
internal_t*i = (internal_t*)dev->internal;
gfxline_t*line2 = transformgfxline(i, line);
gfxmatrix_t m2;
gfxmatrix_multiply(&i->matrix, matrix, &m2);
i->out->fillbitmap(i->out, line2, img, &m2, cxform);
gfxline_free(line2);
}
void rescale_fillgradient(gfxdevice_t*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*matrix)
{
internal_t*i = (internal_t*)dev->internal;
gfxline_t*line2 = transformgfxline(i, line);
i->out->fillgradient(i->out, line2, gradient, type, matrix);
gfxline_free(line2);
}
void rescale_addfont(gfxdevice_t*dev, gfxfont_t*font)
{
internal_t*i = (internal_t*)dev->internal;
i->out->addfont(i->out, font);
}
void rescale_drawchar(gfxdevice_t*dev, gfxfont_t*font, int glyphnr, gfxcolor_t*color, gfxmatrix_t*matrix)
{
internal_t*i = (internal_t*)dev->internal;
gfxmatrix_t m2;
gfxmatrix_multiply(&i->matrix, matrix, &m2);
i->out->drawchar(i->out, font, glyphnr, color, &m2);
}
void rescale_drawlink(gfxdevice_t*dev, gfxline_t*line, const char*action)
{
internal_t*i = (internal_t*)dev->internal;
gfxline_t*line2 = transformgfxline(i, line);
i->out->drawlink(i->out, line2, action);
gfxline_free(line2);
}
void rescale_endpage(gfxdevice_t*dev)
{
internal_t*i = (internal_t*)dev->internal;
i->out->endpage(i->out);
}
gfxresult_t* rescale_finish(gfxdevice_t*dev)
{
internal_t*i = (internal_t*)dev->internal;
gfxdevice_t*out = i->out;
free(dev->internal);dev->internal = 0;i=0;
if(out) {
return out->finish(out);
} else {
return 0;
}
}
void gfxdevice_rescale_init(gfxdevice_t*dev, gfxdevice_t*out, int width, int height, double scale)
{
internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
memset(dev, 0, sizeof(gfxdevice_t));
dev->name = "rescale";
dev->internal = i;
dev->setparameter = rescale_setparameter;
dev->startpage = rescale_startpage;
dev->startclip = rescale_startclip;
dev->endclip = rescale_endclip;
dev->stroke = rescale_stroke;
dev->fill = rescale_fill;
dev->fillbitmap = rescale_fillbitmap;
dev->fillgradient = rescale_fillgradient;
dev->addfont = rescale_addfont;
dev->drawchar = rescale_drawchar;
dev->drawlink = rescale_drawlink;
dev->endpage = rescale_endpage;
dev->finish = rescale_finish;
gfxmatrix_unit(&i->matrix);
i->targetwidth = width;
i->targetheight = height;
i->zoomwidth = 1.0;
i->centerx = 1;
i->matrix.m00 = scale;
i->matrix.m01 = 0;
i->matrix.m11 = scale;
i->matrix.m10 = 0;
i->matrix.tx = 0;
i->matrix.ty = 0;
i->zoomwidth = scale;
i->out = out;
}
void gfxdevice_rescale_setzoom(gfxdevice_t*dev, double scale)
{
internal_t*i = (internal_t*)dev->internal;
if(strcmp(dev->name, "rescale")) {
fprintf(stderr, "Internal error: can't cast device %s to a rescale device\n", dev->name);
return;
}
i->matrix.m00 = scale;
i->matrix.m01 = 0;
i->matrix.m11 = scale;
i->matrix.m10 = 0;
i->matrix.tx = 0;
i->matrix.ty = 0;
i->zoomwidth = scale;
}
void gfxdevice_rescale_setdevice(gfxdevice_t*dev, gfxdevice_t*out)
{
internal_t*i = (internal_t*)dev->internal;
if(strcmp(dev->name, "rescale")) {
fprintf(stderr, "Internal error: can't cast device %s to a rescale device\n", dev->name);
return;
}
i->out = out;
}
gfxdevice_t* gfxdevice_rescale_new(gfxdevice_t*out, int width, int height, double scale)
{
gfxdevice_t* d = (gfxdevice_t*)malloc(sizeof(gfxdevice_t));
gfxdevice_rescale_init(d, out, width, height, scale);
return d;
}