SparrowOSTS_121127.ISO
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Terry A. Davis authored and minexew committed
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#help_index "Graphics/Windows BMP Files"
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//This provides support for Window's BMP files.
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class CFileBMP
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{
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U16 type;
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U32 file_size;
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U32 reserved;
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U32 data_offset;
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U32 header_size;
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U32 width;
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U32 height;
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U16 planes;
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U16 bit_cnt;
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U32 compression;
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U32 image_size;
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U32 x_pixels_per_meter;
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U32 y_pixels_per_meter;
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U32 colors_used;
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U32 important_colors;
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U0 end;
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CBGR palette[16];
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};
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CFileBMP *BMPFileNew(I64 width,I64 height,I64 bits)
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{
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CFileBMP *r;
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I64 size;
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if (bits==24)
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size=offset(CFileBMP.end)+
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width*height*sizeof(CRGB);
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else if (bits==4)
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size=offset(CFileBMP.end)+
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width*height>>1+16*sizeof(CBGR);
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else {
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"Format Not Supported.\n";
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return NULL;
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}
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r=CAlloc(size);
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r->type=0x4D42;
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r->planes=1;
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r->file_size=size;
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r->data_offset=offset(CFileBMP.end);
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r->header_size=offset(CFileBMP.end)-
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offset(CFileBMP.header_size);
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r->width=width;
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r->height=height;
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if (bits==24) {
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r->bit_cnt=32;
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r->image_size=width*height<<2;
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} else {
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r->bit_cnt=4;
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r->image_size=width*height>>1;
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r->data_offset+=16*sizeof(CBGR);
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GetVGAPalette4(r->palette);
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}
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return r;
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}
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public CFileBMP *BMPFile4To(CDC *dc)
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{
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//To Windows 4 bit BMP
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U8 *src;
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CFileBMP *r=BMPFileNew(dc->width,dc->height,4);
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I64 x,y,w=dc->width>>1;
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U8 *bgr;
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bgr=r(U8 *)+r->data_offset;
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for (y=dc->height-1;y>=0;y--) {
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src=y*dc->width_internal+dc->body;
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for (x=0;x<w;x++) {
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*bgr|=(*src++&15)<<4;
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*bgr|=*src++&15;
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bgr++;
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}
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}
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return r;
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}
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public CFileBMP *BMPFile24To(CDC *dc)
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{
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//To Windows 24 bit BMP
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U8 *src;
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CFileBMP *r=BMPFileNew(dc->width,dc->height,24);
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I64 i,x,y;
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CBGR *bgr;
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bgr=r(U8 *)+r->data_offset;
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for (y=dc->height-1;y>=0;y--) {
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src=y*dc->width_internal+dc->body;
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for (x=0;x<dc->width;x++) {
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i=*src++;
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if (i&BLUE) bgr->b=0x7F;
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if (i&GREEN) bgr->g=0x7F;
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if (i&RED) bgr->r=0x7F;
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if (i&8) {
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if (bgr->b) bgr->b=0xFF;
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if (bgr->g) bgr->g=0xFF;
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if (bgr->r) bgr->r=0xFF;
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}
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bgr(U8 *)+=4;
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}
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}
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return r;
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}
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public I64 BMPFileWrite(U8 *filename,CDC *dc,I64 bits=4)
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{ //Window's BMP Files
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I64 size;
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CFileBMP *r;
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if (bits==4)
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r=BMPFile4To(dc);
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else if (bits==24)
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r=BMPFile24To(dc);
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else {
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"Format Not Supported.\n";
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return 0;
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}
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size=r->file_size;
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FileWrite(filename,r,r->file_size);
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Free(r);
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return size;
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}
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U8 *BMPFilePaletteNew(CFileBMP *r)
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{
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I64 i,j,best,score,best_score;
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CBGR palette[16];
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U8 *result=CAlloc(16*sizeof(U8));
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GetVGAPalette4(palette);
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for (i=0;i<16;i++) {
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best=i;
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best_score=MAX_I64;
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for (j=0;j<16;j++) {
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score=SqrI64(r->palette[i].r-palette[j].r)+
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SqrI64(r->palette[i].g-palette[j].g)+
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SqrI64(r->palette[i].b-palette[j].b);
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if (score<best_score) {
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best=j;
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best_score=score;
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}
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}
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result[i]=best;
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}
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return result;
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}
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U8 ms_paint_palette[16]={0,4,2,6,1,5,3,8,7,12,10,14,9,13,11,15};
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public CDC *BMPFileRead(U8 *filename,Bool use_ms_paint_palette=FALSE)
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{ //Window's BMP Files
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I64 i,j;
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U8 *palette_map,*ptr1;
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CFileBMP *r;
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CDC *result=NULL;
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if (ptr1=FileRead(filename)) {
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r=ptr1;
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if (0<r->width<MAX_I32 && 0<r->height<MAX_I32) {
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result=DCNew(DCT_COLOR8,r->width,r->height);
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ptr1+=r->data_offset;
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if (r->bit_cnt==4) {
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if (use_ms_paint_palette)
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palette_map=ms_paint_palette;
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else
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palette_map=BMPFilePaletteNew(r);
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for (i=r->height-1;i>=0;i--)
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for (j=0;j<(r->width+7)&-8;) {
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result->color=palette_map[*ptr1&15];
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GrPlot(result,j+1,i);
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result->color=palette_map[*ptr1>>4];
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GrPlot(result,j,i);
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ptr1++;
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j+=2;
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}
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if (!use_ms_paint_palette)
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Free(palette_map);
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} else {
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"Format Not Supported.\n";
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DCDel(result);
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result=NULL;
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}
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} else
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"Invalid BMP File\n";
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Free(r);
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}
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return result;
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}
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#help_index "Graphics/CSprite;Graphics/Windows BMP Files;Doc/Output"
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public U0 DocPutBMPFile(CDoc *doc=NULL,U8 *fname,Bool use_ms_paint_palette=FALSE)
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{
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CDC *dc=BMPFileRead(fname,use_ms_paint_palette);
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CSprite *elems=DC2Sprite(dc);
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DocPutSprite(doc,elems);
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Free(elems);
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DCDel(dc);
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}
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#help_index "Graphics/Windows BMP Files;Graphics/Screen"
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public I64 BMPFileCaptureScreen(U8 *filename,I64 bits=4)
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{
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CDC *dc=DCCaptureScreen;
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I64 size=BMPFileWrite(filename,dc,bits);
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DCDel(dc);
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return size;
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}
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#help_index ""
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