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-rw-r--r--src/ps_image.cxx674
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diff --git a/src/ps_image.cxx b/src/ps_image.cxx
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+++ /dev/null
@@ -1,674 +0,0 @@
-//
-// "$Id: image.cxx 4324 2005-05-09 21:47:22Z rokan $"
-//
-// Postscript image drawing implementation for the Fast Light Tool Kit (FLTK).
-//
-// Copyright 1998-2015 by Bill Spitzak and others.
-//
-// This library is free software. Distribution and use rights are outlined in
-// the file "COPYING" which should have been included with this file. If this
-// file is missing or damaged, see the license at:
-//
-// http://www.fltk.org/COPYING.php
-//
-// Please report all bugs and problems on the following page:
-//
-// http://www.fltk.org/str.php
-//
-
-#ifndef FL_DOXYGEN
-
-#include <stdio.h>
-#include <math.h>
-#include <string.h>
-
-#include <FL/Fl_PostScript.H>
-#include <FL/Fl.H>
-#include <FL/Fl_Pixmap.H>
-#include <FL/Fl_Bitmap.H>
-
-
-//
-// Implementation of the /ASCII85Encode PostScript filter
-// as described in "PostScript LANGUAGE REFERENCE third edition" p. 131
-//
-struct struct85 {
- uchar bytes4[4]; // holds up to 4 input bytes
- int l4; // # of unencoded input bytes
- int blocks; // counter to insert newlines after 80 output characters
- uchar chars5[5]; // holds 5 output characters
-};
-
-
-void *Fl_PostScript_Graphics_Driver::prepare85() // prepare to produce ASCII85-encoded output
-{
- struct85 *big = new struct85;
- big->l4 = 0;
- big->blocks = 0;
- return big;
-}
-
-// ASCII85-encodes 4 input bytes from bytes4 into chars5 array
-// returns # of output chars
-static int convert85(const uchar *bytes4, uchar *chars5)
-{
- if (bytes4[0] == 0 && bytes4[1] == 0 && bytes4[2] == 0 && bytes4[3] == 0) {
- chars5[0] = 'z';
- return 1;
- }
- unsigned val = bytes4[0]*(256*256*256) + bytes4[1]*(256*256) + bytes4[2]*256 + bytes4[3];
- chars5[0] = val / 52200625 + 33; // 52200625 = 85 to the 4th
- val = val % 52200625;
- chars5[1] = val / 614125 + 33; // 614125 = 85 cube
- val = val % 614125;
- chars5[2] = val / 7225 + 33; // 7225 = 85 squared
- val = val % 7225;
- chars5[3] = val / 85 + 33;
- chars5[4] = val % 85 + 33;
- return 5;
-}
-
-
-void Fl_PostScript_Graphics_Driver::write85(void *data, const uchar *p, int len) // sends len input bytes for ASCII85 encoding
-{
- struct85 *big = (struct85 *)data;
- const uchar *last = p + len;
- while (p < last) {
- int c = 4 - big->l4;
- if (last-p < c) c = last-p;
- memcpy(big->bytes4 + big->l4, p, c);
- p += c;
- big->l4 += c;
- if (big->l4 == 4) {
- c = convert85(big->bytes4, big->chars5);
- fwrite(big->chars5, c, 1, output);
- big->l4 = 0;
- if (++big->blocks >= 16) { fputc('\n', output); big->blocks = 0; }
- }
- }
-}
-
-
-void Fl_PostScript_Graphics_Driver::close85(void *data) // stops ASCII85-encoding after processing remaining unencoded input bytes, if any
-{
- struct85 *big = (struct85 *)data;
- int l;
- if (big->l4) { // # of remaining unencoded input bytes
- l = big->l4;
- while (l < 4) big->bytes4[l++] = 0; // complete them with 0s
- l = convert85(big->bytes4, big->chars5); // encode them
- if (l == 1) memset(big->chars5, '!', 5);
- fwrite(big->chars5, big->l4 + 1, 1, output);
- }
- fputs("~>", output); // write EOD mark
- delete big;
-}
-
-//
-// End of implementation of the /ASCII85Encode PostScript filter
-//
-
-//
-// Implementation of the /RunLengthEncode + /ASCII85Encode PostScript filter
-// as described in "PostScript LANGUAGE REFERENCE third edition" p. 142
-//
-
-struct struct_rle85 {
- struct85 *data85; // aux data for ASCII85 encoding
- uchar buffer[128]; // holds non-run data
- int count; // current buffer length
- int run_length; // current length of run
-};
-
-void *Fl_PostScript_Graphics_Driver::prepare_rle85() // prepare to produce RLE+ASCII85-encoded output
-{
- struct_rle85 *rle = new struct_rle85;
- rle->count = 0;
- rle->run_length = 0;
- rle->data85 = (struct85*)prepare85();
- return rle;
-}
-
-
-void Fl_PostScript_Graphics_Driver::write_rle85(uchar b, void *data) // sends one input byte to RLE+ASCII85 encoding
-{
- struct_rle85 *rle = (struct_rle85 *)data;
- uchar c;
- if (rle->run_length > 0) { // if within a run
- if (b == rle->buffer[0] && rle->run_length < 128) { // the run can be extended
- rle->run_length++;
- return;
- } else { // output the run
- c = (uchar)(257 - rle->run_length);
- write85(rle->data85, &c, 1); // the run-length info
- write85(rle->data85, rle->buffer, 1); // the byte of the run
- rle->run_length = 0;
- }
- }
- if (rle->count >= 2 && b == rle->buffer[rle->count-1] && b == rle->buffer[rle->count-2]) {
- // about to begin a run
- if (rle->count > 2) { // there is non-run data before the run in the buffer
- c = (uchar)(rle->count-2 - 1);
- write85(rle->data85, &c, 1); // length of non-run data
- write85(rle->data85, rle->buffer, rle->count-2); // non-run data
- }
- rle->run_length = 3;
- rle->buffer[0] = b;
- rle->count = 0;
- return;
- }
- if (rle->count >= 128) { // the non-run buffer is full, output it
- c = (uchar)(rle->count - 1);
- write85(rle->data85, &c, 1); // length of non-run data
- write85(rle->data85, rle->buffer, rle->count); // non-run data
- rle->count = 0;
- }
- rle->buffer[rle->count++] = b; // add byte to end of non-run buffer
-}
-
-
-void Fl_PostScript_Graphics_Driver::close_rle85(void *data) // stop doing RLE+ASCII85 encoding
-{
- struct_rle85 *rle = (struct_rle85 *)data;
- uchar c;
- if (rle->run_length > 0) { // if within a run, output it
- c = (uchar)(257 - rle->run_length);
- write85(rle->data85, &c, 1);
- write85(rle->data85, rle->buffer, 1);
- } else if (rle->count) { // output the non-run buffer, if not empty
- c = (uchar)(rle->count - 1);
- write85(rle->data85, &c, 1);
- write85(rle->data85, rle->buffer, rle->count);
- }
- c = (uchar)128;
- write85(rle->data85, &c, 1); // output EOD mark
- close85(rle->data85); // close ASCII85 encoding process
- delete rle;
-}
-
-//
-// End of implementation of the /RunLengthEncode + /ASCII85Encode PostScript filter
-//
-
-
-int Fl_PostScript_Graphics_Driver::alpha_mask(const uchar * data, int w, int h, int D, int LD){
-
- mask = 0;
- if ((D/2)*2 != D){ //no mask info
- return 0;
- }
- int xx;
- int i,j, k, l;
- LD += w*D;
- int V255=0;
- int V0 =0;
- int V_=0;
- for (j=0;j<h;j++){
- for (i=0;i<w;i++)
- switch(data[j*LD+D*i+D-1]){
- case 255: V255 = 1; break;
- case 0: V0 = 1; break;
- default: V_= 1;
- }
- if (V_) break;
- };
- if (!V_){
- if (V0)
- if (V255){// not true alpha, only masking
- xx = (w+7)/8;
- mask = new uchar[h * xx];
- for (i=0;i<h * xx;i++) mask[i]=0;
- for (j=0;j<h;j++)
- for (i=0;i<w;i++)
- if (data[j*LD+D*i+D-1])
- mask[j*xx+i/8] |= 1 << (i % 8);
- mx = w;
- my = h; //mask imensions
- return 0;
- } else {
- mask=0;
- return 1; //everything masked
- }
- else
- return 0;
- }
-
-
-
- ///// Alpha dither, generating (4*w) * 4 mask area /////
- ///// with Floyd-Steinberg error diffusion /////
-
- mask = new uchar[((w+1)/2) * h * 4];
-
- for (i = 0; i<((w+1)/2) * h * 4; i++) mask[i] = 0; //cleaning
-
-
-
- mx= w*4;
- my=h*4; // mask dimensions
-
- xx = (w+1)/2; // mask line width in bytes
-
- short * errors1 = new short [w*4+2]; // two rows of dither errors
- short * errors2 = new short [w*4+2]; // two rows of dither errors
-
- for (i=0; i<w*4+2; i++) errors2[i] = 0; // cleaning,after first swap will become current
- for (i=0; i<w*4+2; i++) errors1[i] = 0; // cleaning,after first swap will become current
-
- short * current = errors1;
- short * next = errors2;
- short * swap;
-
- for (j=0; j<h; j++){
- for (l=0; l<4; ){ // generating 4 rows of mask lines for 1 RGB line
- int jj = j*4+l;
-
- /// mask row index
- swap = next;
- next = current;
- current = swap;
- *(next+1) = 0; // must clean the first cell, next are overriden by *1
- for (i=0; i<w; i++){
- for (k=0; k<4; k++){ // generating 4 x-pixels for 1 RGB
- short error, o1, o2, o3;
- int ii = i*4+k; // mask cell index
- short val = data[j*LD+D*i+D-1] + current[1+ii];
- if (val>127){
- mask[jj*xx+ii/8] |= 1 << (ii % 8); //set mask bit
- error = val-255;
- }else
- error = val;
-
- ////// error spreading /////
- if (error >0){
- next[ii] += o1 = (error * 3 + 8)/16;
- current[ii+2] += o2 = (error * 7 + 8)/16;
- next[ii+2] = o3 =(error + 8)/16; // *1 - ok replacing (cleaning)
- } else {
- next[ii] += o1 = (error * 3 - 8)/16;
- current[ii+2] += o2 = (error * 7 - 8)/16;
- next[ii+2] = o3 = (error - 8)/16;
- }
- next[1+ii] += error - o1 - o2 - o3;
- }
- }
- l++;
-
- ////// backward
-
- jj = j*4+l;
- swap = next;
- next = current;
- current = swap;
- *(next+1) = 0; // must clean the first cell, next are overriden by *1
-
- for (i = w-1; i >= 0; i--){
-
- for (k=3; k>=0; k--){ // generating 4 x-pixels for 1 RGB
- short error, o1, o2, o3;
-
- int ii = i*4+k; // mask cell index
- short val = data[j*LD+D*i+D-1] + current[1+ii];
- if (val>127){
-
- mask[jj*xx+ii/8] |= 1 << (ii % 8); //set mask bit
- error = val-255;
- } else
- error = val;
-
- ////// error spreading /////
- if (error >0){
- next[ii+2] += o1 = (error * 3 + 8)/16;
- current[ii] += o2 = (error * 7 + 8)/16;
- next[ii] = o3 =(error + 8)/16; // *1 - ok replacing (cleaning)
- } else {
- next[ii+2] += o1 = (error * 3 - 8)/16;
-
- current[ii] += o2 = (error * 7 - 8)/16;
- next[ii] = o3 = (error - 8)/16;
- }
- next[1+ii] += error - o1 - o2 - o3;
- }
- }
- l++;
- }
- }
- delete[] errors1;
- delete[] errors2;
- return 0;
-}
-
-// bitwise inversion of all 4-bit quantities
-static const unsigned char swapped[16] = {0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15};
-
-// bitwise inversion of a byte
-static inline uchar swap_byte(const uchar b) {
- return (swapped[b & 0xF] << 4) | swapped[b >> 4];
-}
-
-
-struct callback_data {
- const uchar *data;
- int D, LD;
-};
-
-
-static void draw_image_cb(void *data, int x, int y, int w, uchar *buf) {
- struct callback_data *cb_data;
- const uchar *curdata;
-
- cb_data = (struct callback_data*)data;
- curdata = cb_data->data + x*cb_data->D + y*cb_data->LD;
-
- memcpy(buf, curdata, w*cb_data->D);
-}
-
-
-void Fl_PostScript_Graphics_Driver::draw_image(const uchar *data, int ix, int iy, int iw, int ih, int D, int LD) {
- if (D<3){ //mono
- draw_image_mono(data, ix, iy, iw, ih, D, LD);
- return;
- }
-
- struct callback_data cb_data;
-
- if (!LD) LD = iw*D;
-
- cb_data.data = data;
- cb_data.D = D;
- cb_data.LD = LD;
-
- draw_image(draw_image_cb, &cb_data, ix, iy, iw, ih, D);
-}
-
-void Fl_PostScript_Graphics_Driver::draw_image(Fl_Draw_Image_Cb call, void *data, int ix, int iy, int iw, int ih, int D) {
- double x = ix, y = iy, w = iw, h = ih;
-
- int level2_mask = 0;
- fprintf(output,"save\n");
- int i,j,k;
- const char * interpol;
- if (lang_level_ > 1) {
- if (interpolate_) interpol="true";
- else interpol="false";
- if (mask && lang_level_ > 2) {
- fprintf(output, "%g %g %g %g %i %i %i %i %s CIM\n", x , y+h , w , -h , iw , ih, mx, my, interpol);
- }
- else if (mask && lang_level_ == 2) {
- level2_mask = 1; // use method for drawing masked color image with PostScript level 2
- fprintf(output, " %g %g %g %g %d %d pixmap_plot\n", x, y, w, h, iw, ih);
- }
- else {
- fprintf(output, "%g %g %g %g %i %i %s CII\n", x , y+h , w , -h , iw , ih, interpol);
- }
- } else {
- fprintf(output , "%g %g %g %g %i %i CI", x , y+h , w , -h , iw , ih);
- }
-
- int LD=iw*D;
- uchar *rgbdata=new uchar[LD];
- uchar *curmask=mask;
- void *big = prepare_rle85();
-
- if (level2_mask) {
- for (j = ih - 1; j >= 0; j--) { // output full image data
- call(data, 0, j, iw, rgbdata);
- uchar *curdata = rgbdata;
- for (i=0 ; i<iw ; i++) {
- write_rle85(curdata[0], big); write_rle85(curdata[1], big); write_rle85(curdata[2], big);
- curdata += D;
- }
- }
- close_rle85(big); fputc('\n', output);
- big = prepare_rle85();
- for (j = ih - 1; j >= 0; j--) { // output mask data
- curmask = mask + j * (my/ih) * ((mx+7)/8);
- for (k=0; k < my/ih; k++) {
- for (i=0; i < ((mx+7)/8); i++) {
- write_rle85(swap_byte(*curmask), big);
- curmask++;
- }
- }
- }
- }
- else {
- for (j=0; j<ih;j++) {
- if (mask && lang_level_ > 2) { // InterleaveType 2 mask data
- for (k=0; k<my/ih;k++) { //for alpha pseudo-masking
- for (i=0; i<((mx+7)/8);i++) {
- write_rle85(swap_byte(*curmask), big);
- curmask++;
- }
- }
- }
- call(data,0,j,iw,rgbdata);
- uchar *curdata=rgbdata;
- for (i=0 ; i<iw ; i++) {
- uchar r = curdata[0];
- uchar g = curdata[1];
- uchar b = curdata[2];
-
- if (lang_level_<3 && D>3) { //can do mixing using bg_* colors)
- unsigned int a2 = curdata[3]; //must be int
- unsigned int a = 255-a2;
- r = (a2 * r + bg_r * a)/255;
- g = (a2 * g + bg_g * a)/255;
- b = (a2 * b + bg_b * a)/255;
- }
-
- write_rle85(r, big); write_rle85(g, big); write_rle85(b, big);
- curdata +=D;
- }
-
- }
- }
- close_rle85(big);
- fprintf(output,"\nrestore\n");
- delete[] rgbdata;
-}
-
-void Fl_PostScript_Graphics_Driver::draw_image_mono(const uchar *data, int ix, int iy, int iw, int ih, int D, int LD) {
- double x = ix, y = iy, w = iw, h = ih;
-
- fprintf(output,"save\n");
-
- int i,j, k;
-
- const char * interpol;
- if (lang_level_>1){
- if (interpolate_)
- interpol="true";
- else
- interpol="false";
- if (mask && lang_level_>2)
- fprintf(output, "%g %g %g %g %i %i %i %i %s GIM\n", x , y+h , w , -h , iw , ih, mx, my, interpol);
- else
- fprintf(output, "%g %g %g %g %i %i %s GII\n", x , y+h , w , -h , iw , ih, interpol);
- }else
- fprintf(output , "%g %g %g %g %i %i GI", x , y+h , w , -h , iw , ih);
-
-
- if (!LD) LD = iw*D;
-
-
- int bg = (bg_r + bg_g + bg_b)/3;
-
- uchar *curmask=mask;
- void *big = prepare_rle85();
- for (j=0; j<ih;j++){
- if (mask){
- for (k=0;k<my/ih;k++){
- for (i=0; i<((mx+7)/8);i++){
- write_rle85(swap_byte(*curmask), big);
- curmask++;
- }
- }
- }
- const uchar *curdata=data+j*LD;
- for (i=0 ; i<iw ; i++) {
- uchar r = curdata[0];
- if (lang_level_<3 && D>1) { //can do mixing
-
- unsigned int a2 = curdata[1]; //must be int
- unsigned int a = 255-a2;
- r = (a2 * r + bg * a)/255;
- }
- write_rle85(r, big);
- curdata +=D;
- }
-
- }
- close_rle85(big);
- fprintf(output,"restore\n");
-}
-
-
-
-void Fl_PostScript_Graphics_Driver::draw_image_mono(Fl_Draw_Image_Cb call, void *data, int ix, int iy, int iw, int ih, int D) {
- double x = ix, y = iy, w = iw, h = ih;
-
- fprintf(output,"save\n");
- int i,j,k;
- const char * interpol;
- if (lang_level_>1){
- if (interpolate_) interpol="true";
- else interpol="false";
- if (mask && lang_level_>2)
- fprintf(output, "%g %g %g %g %i %i %i %i %s GIM\n", x , y+h , w , -h , iw , ih, mx, my, interpol);
- else
- fprintf(output, "%g %g %g %g %i %i %s GII\n", x , y+h , w , -h , iw , ih, interpol);
- } else
- fprintf(output , "%g %g %g %g %i %i GI", x , y+h , w , -h , iw , ih);
-
- int LD=iw*D;
- uchar *rgbdata=new uchar[LD];
- uchar *curmask=mask;
- void *big = prepare_rle85();
- for (j=0; j<ih;j++){
-
- if (mask && lang_level_>2){ // InterleaveType 2 mask data
- for (k=0; k<my/ih;k++){ //for alpha pseudo-masking
- for (i=0; i<((mx+7)/8);i++){
- write_rle85(swap_byte(*curmask), big);
- curmask++;
- }
- }
- }
- call(data,0,j,iw,rgbdata);
- uchar *curdata=rgbdata;
- for (i=0 ; i<iw ; i++) {
- write_rle85(curdata[0], big);
- curdata +=D;
- }
- }
- close_rle85(big);
- fprintf(output,"restore\n");
- delete[] rgbdata;
-}
-
-
-////////////////////////////// Image classes //////////////////////
-
-
-void Fl_PostScript_Graphics_Driver::draw(Fl_Pixmap * pxm,int XP, int YP, int WP, int HP, int cx, int cy){
- const char * const * di =pxm->data();
- int w,h;
- if (!fl_measure_pixmap(di, w, h)) return;
- mask=0;
- mask_bitmap(&mask);
- mx = WP;
- my = HP;
- push_clip(XP, YP, WP, HP);
- fl_draw_pixmap(di,XP -cx, YP -cy, FL_BLACK );
- pop_clip();
- delete[] mask;
- mask=0;
- mask_bitmap(0);
-}
-
-void Fl_PostScript_Graphics_Driver::draw(Fl_RGB_Image * rgb,int XP, int YP, int WP, int HP, int cx, int cy){
- const uchar * di = rgb->array;
- int w = rgb->w();
- int h = rgb->h();
- mask=0;
- if (lang_level_>2) //when not true, not making alphamask, mixing colors instead...
- if (alpha_mask(di, w, h, rgb->d(),rgb->ld())) return; //everthing masked, no need for painting!
- push_clip(XP, YP, WP, HP);
- draw_image(di, XP + cx, YP + cy, w, h, rgb->d(), rgb->ld());
- pop_clip();
- delete[]mask;
- mask=0;
-}
-
-int Fl_PostScript_Graphics_Driver::draw_scaled(Fl_Image *img, int XP, int YP, int WP, int HP){
- int X, Y, W, H;
- clip_box(XP,YP,WP,HP,X,Y,W,H); // X,Y,W,H will give the unclipped area of XP,YP,WP,HP
- if (W == 0 || H == 0) return 1;
- push_no_clip(); // remove the FLTK clip that can't be rescaled
- clocale_printf("%d %d %i %i CL\n", X, Y, W, H);
- clocale_printf("GS %d %d TR %f %f SC GS\n", XP, YP, float(WP)/img->w(), float(HP)/img->h());
- img->draw(0, 0, img->w(), img->h(), 0, 0);
- clocale_printf("GR GR\n");
- pop_clip(); // restore FLTK's clip
- return 1;
-}
-
-void Fl_PostScript_Graphics_Driver::draw(Fl_Bitmap * bitmap,int XP, int YP, int WP, int HP, int cx, int cy){
- const uchar * di = bitmap->array;
- int w,h;
- int LD=(bitmap->w()+7)/8;
- int xx;
-
- if (WP> bitmap->w() - cx){// to assure that it does not go out of bounds;
- w = bitmap->w() - cx;
- xx = (bitmap->w()+7)/8 - cx/8; //length of mask in bytes
- }else{
- w =WP;
- xx = (w+7)/8 - cx/8;
- }
- if ( HP > bitmap->h()-cy)
- h = bitmap->h() - cy;
- else
- h = HP;
-
- di += cy*LD + cx/8;
- int si = cx % 8; // small shift to be clipped, it is simpler than shifting whole mask
-
- int i,j;
- push_clip(XP, YP, WP, HP);
- fprintf(output , "%i %i %i %i %i %i MI\n", XP - si, YP + HP , WP , -HP , w , h);
-
- void *rle85 = prepare_rle85();
- for (j=0; j<HP; j++){
- for (i=0; i<xx; i++){
- write_rle85(swap_byte(*di), rle85);
- di++;
- }
- }
- close_rle85(rle85); fputc('\n', output);
- pop_clip();
-}
-
-#endif // FL_DOXYGEN
-
-//
-// End of "$Id: image.cxx 4324 2005-05-09 21:47:22Z rokan $"
-//
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generated by cgit v1.2.3 (git 2.25.1) at 2026-02-09 06:40:20 +0000