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https://github.com/david-schmidt/gsport.git
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Implement RLE and ASCII85 encoding on color Postscript output in the Imagewriter emulator. Fix B&W Postscript output scaling bug.
This commit is contained in:
Christopher Mason
parent
4c064fd973
commit
fdead45d01
@ -1803,10 +1803,7 @@ SDL_FreeSurface(image);*/
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else if (strcasecmp(output, "colorps") == 0)
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{
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FILE* psfile = NULL;
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Uint8 r, g, b;
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int x, y;
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int cur_line_len = 0;
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int plane;
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// Continue postscript file?
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if (outputHandle != NULL)
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psfile = (FILE*)outputHandle;
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@ -1822,71 +1819,95 @@ SDL_FreeSurface(image);*/
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psfile = fopen(fname, "wb");
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if (!psfile)
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{
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printf("PRINTER: Can't open file %s for printer output", fname);
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//LOG(LOG_MISC,LOG_ERROR)("PRINTER: Can't open file %s for printer output", fname);
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return;
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}
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// Print header
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fprintf(psfile, "%%!PS-Adobe-2.0 EPSF-2.0\n");
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fprintf(psfile, "%%!PS-Adobe-3.0\n");
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fprintf(psfile, "%%%%Pages: (atend)\n");
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fprintf(psfile, "%%%%BoundingBox: 0 0 %i %i\n", (Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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fprintf(psfile, "%%%%BoundingBox: 0 0 %i %i\n", (Bit16u)(defaultPageWidth*72), (Bit16u)(defaultPageHeight*72));
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fprintf(psfile, "%%%%Creator: GSport Virtual Printer\n");
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fprintf(psfile, "%%%%DocumentData: Clean7Bit\n");
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fprintf(psfile, "%%%%LanguageLevel: 2\n");
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fprintf(psfile, "%%%%EndComments\n");
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multiPageCounter = 1;
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}
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fprintf(psfile, "%%%%Page: %i %i\n", multiPageCounter, multiPageCounter);
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fprintf(psfile, "%i %i scale\n", (Bit16u)(defaultPageWidth*72), (Bit16u)(defaultPageHeight*72));
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fprintf(psfile, "%i %i 8 [%i 0 0 -%i 0 %i]\n", page->w, page->h, page->w, page->h, page->h);
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fprintf(psfile, "currentfile\n");
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fprintf(psfile, "/ASCII85Decode filter\n");
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fprintf(psfile, "/RunLengthDecode filter\n");
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fprintf(psfile, "false 3\n");
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fprintf(psfile, "colorimage\n");
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SDL_LockSurface(page);
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Bit8u * templine;
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templine = (Bit8u*) malloc(page->w*3);
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Bit32u x = 0;
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Bit32u numy = page->h;
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Bit32u numx = page->w;
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Bit32u numpix = page->w*3;
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Bit32u pix = 0;
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Bit32u currDot = 0;
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Bit32u y = 0;
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Bit32u plane = 0;
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Bit8u r, g, b;
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ASCII85BufferPos = ASCII85CurCol = 0;
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for (y=0; y < numy;y++)
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{
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currDot = 0;
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for (x = 0; x < numx; x++)
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{
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SDL_GetRGB(getxyPixel(x,y), page->format, &r, &g, &b);
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templine[currDot] = ~r; currDot++;
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templine[currDot] = ~g; currDot++;
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templine[currDot] = ~b; currDot++;
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}
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// Compress data using RLE
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pix = 0;
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while (pix < numpix)
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{
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if ((pix < numpix-2) && (templine[pix] == templine[pix+1]) && (templine[pix] == templine[pix+2]))
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{
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// Found three or more pixels with the same color
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Bit8u sameCount = 3;
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Bit8u col = templine[pix];
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while (sameCount < 128 && sameCount+pix < numpix && col == templine[pix+sameCount])
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sameCount++;
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fprintf(psfile, "%%%%Page: %i %i\n", multiPageCounter, multiPageCounter);
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fprintASCII85(psfile, 257-sameCount);
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fprintASCII85(psfile, 255-col);
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fprintf(psfile, "<< /PageSize [ %d %d ] /ImagingBBox null >> setpagedevice\n",
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(Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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/* Define a 'readstring' routine and 'picstr' routines for RGB: */
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// Skip ahead
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pix += sameCount;
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}
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else
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{
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// Find end of heterogenous area
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Bit8u diffCount = 1;
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while (diffCount < 128 && diffCount+pix < numpix &&
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(
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(diffCount+pix < numpix-2)
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|| (templine[pix+diffCount] != templine[pix+diffCount+1])
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|| (templine[pix+diffCount] != templine[pix+diffCount+2])
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))
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diffCount++;
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fprintf(psfile, "/readstring {\n");
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fprintf(psfile, " currentfile exch readhexstring pop\n");
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fprintf(psfile, "} bind def\n");
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fprintf(psfile, "/rpicstr %d string def\n", page->w);
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fprintf(psfile, "/gpicstr %d string def\n", page->w);
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fprintf(psfile, "/bpicstr %d string def\n", page->w);
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fprintf(psfile, "%%%%EndProlog\n");
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fprintf(psfile, "gsave\n");
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fprintf(psfile, "%i %i scale\n", (Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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fprintf(psfile, "%d %d 8\n", page->w, page->h);
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fprintf(psfile, "%i %i 8 [%i 0 0 -%i 0 %i]\n", page->w, page->h, page->w, page->h, page->h);
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fprintf(psfile, "{ rpicstr readstring }\n");
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fprintf(psfile, "{ gpicstr readstring }\n");
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fprintf(psfile, "{ bpicstr readstring }\n");
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fprintf(psfile, "true 3\n");
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fprintf(psfile, "colorimage\n");
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for (y = 0; y < page->h; y++)
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{
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for (plane = 0; plane < 3; plane++)
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{
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for (x = 0; x < page->w; x++)
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{
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SDL_GetRGB(getxyPixel(x,y), page->format, &r, &g, &b);
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fprintf(psfile, "%02x", (plane == 0 ? r : (plane == 1 ? g : b)));
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cur_line_len++;
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if (cur_line_len >= 30)
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{
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fprintf(psfile, "\n");
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cur_line_len = 0;
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}
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}
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}
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}
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fprintf(psfile, "\n");
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fprintf(psfile, "grestore\n");
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fprintASCII85(psfile, diffCount-1);
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for (Bit8u i=0; i<diffCount; i++)
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fprintASCII85(psfile, 255-templine[pix++]);
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}
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}
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}
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// Write EOD for RLE and ASCII85
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fprintASCII85(psfile, 128);
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fprintASCII85(psfile, 256);
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SDL_UnlockSurface(page);
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free(templine);
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fprintf(psfile, "showpage\n");
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@ -1930,7 +1951,7 @@ fprintf(psfile, "%%%%EndProlog\n");
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// Print header
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fprintf(psfile, "%%!PS-Adobe-3.0\n");
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fprintf(psfile, "%%%%Pages: (atend)\n");
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fprintf(psfile, "%%%%BoundingBox: 0 0 %i %i\n", (Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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fprintf(psfile, "%%%%BoundingBox: 0 0 %i %i\n", (Bit16u)(defaultPageWidth*72), (Bit16u)(defaultPageHeight*72));
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fprintf(psfile, "%%%%Creator: GSport Virtual Printer\n");
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fprintf(psfile, "%%%%DocumentData: Clean7Bit\n");
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fprintf(psfile, "%%%%LanguageLevel: 2\n");
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@ -1939,7 +1960,7 @@ fprintf(psfile, "%%%%EndProlog\n");
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}
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fprintf(psfile, "%%%%Page: %i %i\n", multiPageCounter, multiPageCounter);
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fprintf(psfile, "%i %i scale\n", (Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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fprintf(psfile, "%i %i scale\n", (Bit16u)(defaultPageWidth*72), (Bit16u)(defaultPageHeight*72));
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fprintf(psfile, "%i %i 8 [%i 0 0 -%i 0 %i]\n", page->w, page->h, page->w, page->h, page->h);
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fprintf(psfile, "currentfile\n");
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fprintf(psfile, "/ASCII85Decode filter\n");
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@ -1901,7 +1901,7 @@ SDL_FreeSurface(image);*/
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// Print header
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fprintf(psfile, "%%!PS-Adobe-3.0\n");
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fprintf(psfile, "%%%%Pages: (atend)\n");
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fprintf(psfile, "%%%%BoundingBox: 0 0 %i %i\n", (Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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fprintf(psfile, "%%%%BoundingBox: 0 0 %i %i\n", (Bit16u)(defaultPageWidth*72), (Bit16u)(defaultPageHeight*72));
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fprintf(psfile, "%%%%Creator: GSport Virtual Printer\n");
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fprintf(psfile, "%%%%DocumentData: Clean7Bit\n");
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fprintf(psfile, "%%%%LanguageLevel: 2\n");
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@ -1910,7 +1910,7 @@ SDL_FreeSurface(image);*/
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}
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fprintf(psfile, "%%%%Page: %i %i\n", multiPageCounter, multiPageCounter);
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fprintf(psfile, "%i %i scale\n", (Bit16u)(defaultPageWidth*74), (Bit16u)(defaultPageHeight*74));
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fprintf(psfile, "%i %i scale\n", (Bit16u)(defaultPageWidth*72), (Bit16u)(defaultPageHeight*72));
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fprintf(psfile, "%i %i 8 [%i 0 0 -%i 0 %i]\n", page->w, page->h, page->w, page->h, page->h);
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fprintf(psfile, "currentfile\n");
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fprintf(psfile, "/ASCII85Decode filter\n");
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