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image.c

#include "quakedef.h"
#include "image.h"
#include "jpeg.h"
#include "image_png.h"
#include "r_shadow.h"

int         image_width;
int         image_height;

void Image_CopyAlphaFromBlueBGRA(unsigned char *outpixels, const unsigned char *inpixels, int w, int h)
{
      int i, n;
      n = w * h;
      for(i = 0; i < n; ++i)
            outpixels[4*i+3] = inpixels[4*i]; // blue channel
}

#if 1
// written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
{
      int index, c, x, y;
      const unsigned char *in, *line;
      int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
      int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);

      for (c = 0; c < numoutputcomponents; c++)
            if (outputinputcomponentindices[c] & 0x80000000)
                  break;
      if (c < numoutputcomponents)
      {
            // special indices used
            if (inputflipdiagonal)
            {
                  for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
                        for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numoutputcomponents)
                              for (c = 0; c < numoutputcomponents; c++)
                                    outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
            }
            else
            {
                  for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
                        for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numoutputcomponents)
                              for (c = 0; c < numoutputcomponents; c++)
                                    outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
            }
      }
      else
      {
            // special indices not used
            if (inputflipdiagonal)
            {
                  for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
                        for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numoutputcomponents)
                              for (c = 0; c < numoutputcomponents; c++)
                                    outpixels[c] = in[outputinputcomponentindices[c]];
            }
            else
            {
                  for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
                        for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numoutputcomponents)
                              for (c = 0; c < numoutputcomponents; c++)
                                    outpixels[c] = in[outputinputcomponentindices[c]];
            }
      }
}
#else
// intentionally readable version
void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
{
      int index, c, x, y;
      const unsigned char *in, *inrow, *incolumn;
      if (inputflipdiagonal)
      {
            for (x = 0;x < inputwidth;x++)
            {
                  for (y = 0;y < inputheight;y++)
                  {
                        in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
                        for (c = 0;c < numoutputcomponents;c++)
                        {
                              index = outputinputcomponentindices[c];
                              if (index & 0x80000000)
                                    *outpixels++ = index;
                              else
                                    *outpixels++ = in[index];
                        }
                  }
            }
      }
      else
      {
            for (y = 0;y < inputheight;y++)
            {
                  for (x = 0;x < inputwidth;x++)
                  {
                        in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
                        for (c = 0;c < numoutputcomponents;c++)
                        {
                              index = outputinputcomponentindices[c];
                              if (index & 0x80000000)
                                    *outpixels++ = index;
                              else
                                    *outpixels++ = in[index];
                        }
                  }
            }
      }
}
#endif

void Image_GammaRemapRGB(const unsigned char *in, unsigned char *out, int pixels, const unsigned char *gammar, const unsigned char *gammag, const unsigned char *gammab)
{
      while (pixels--)
      {
            out[0] = gammar[in[0]];
            out[1] = gammag[in[1]];
            out[2] = gammab[in[2]];
            in += 3;
            out += 3;
      }
}

// note: pal must be 32bit color
void Image_Copy8bitBGRA(const unsigned char *in, unsigned char *out, int pixels, const unsigned int *pal)
{
      int *iout = (int *)out;
      while (pixels >= 8)
      {
            iout[0] = pal[in[0]];
            iout[1] = pal[in[1]];
            iout[2] = pal[in[2]];
            iout[3] = pal[in[3]];
            iout[4] = pal[in[4]];
            iout[5] = pal[in[5]];
            iout[6] = pal[in[6]];
            iout[7] = pal[in[7]];
            in += 8;
            iout += 8;
            pixels -= 8;
      }
      if (pixels & 4)
      {
            iout[0] = pal[in[0]];
            iout[1] = pal[in[1]];
            iout[2] = pal[in[2]];
            iout[3] = pal[in[3]];
            in += 4;
            iout += 4;
      }
      if (pixels & 2)
      {
            iout[0] = pal[in[0]];
            iout[1] = pal[in[1]];
            in += 2;
            iout += 2;
      }
      if (pixels & 1)
            iout[0] = pal[in[0]];
}

/*
=================================================================

  PCX Loading

=================================================================
*/

00171 typedef struct pcx_s
{
    char    manufacturer;
    char    version;
    char    encoding;
    char    bits_per_pixel;
    unsigned short      xmin,ymin,xmax,ymax;
    unsigned short      hres,vres;
    unsigned char palette[48];
    char    reserved;
    char    color_planes;
    unsigned short      bytes_per_line;
    unsigned short      palette_type;
    char    filler[58];
} pcx_t;

/*
============
LoadPCX
============
*/
unsigned char* LoadPCX_BGRA (const unsigned char *f, int filesize, int *miplevel)
{
      pcx_t pcx;
      unsigned char *a, *b, *image_buffer, *pbuf;
      const unsigned char *palette, *fin, *enddata;
      int x, y, x2, dataByte;

      if (filesize < (int)sizeof(pcx) + 768)
      {
            Con_Print("Bad pcx file\n");
            return NULL;
      }

      fin = f;

      memcpy(&pcx, fin, sizeof(pcx));
      fin += sizeof(pcx);

      // LordHavoc: big-endian support ported from QF newtree
      pcx.xmax = LittleShort (pcx.xmax);
      pcx.xmin = LittleShort (pcx.xmin);
      pcx.ymax = LittleShort (pcx.ymax);
      pcx.ymin = LittleShort (pcx.ymin);
      pcx.hres = LittleShort (pcx.hres);
      pcx.vres = LittleShort (pcx.vres);
      pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
      pcx.palette_type = LittleShort (pcx.palette_type);

      image_width = pcx.xmax + 1 - pcx.xmin;
      image_height = pcx.ymax + 1 - pcx.ymin;
      if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
      {
            Con_Print("Bad pcx file\n");
            return NULL;
      }

      palette = f + filesize - 768;

      image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
      if (!image_buffer)
      {
            Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
            return NULL;
      }
      pbuf = image_buffer + image_width*image_height*3;
      enddata = palette;

      for (y = 0;y < image_height && fin < enddata;y++)
      {
            a = pbuf + y * image_width;
            for (x = 0;x < image_width && fin < enddata;)
            {
                  dataByte = *fin++;
                  if(dataByte >= 0xC0)
                  {
                        if (fin >= enddata)
                              break;
                        x2 = x + (dataByte & 0x3F);
                        dataByte = *fin++;
                        if (x2 > image_width)
                              x2 = image_width; // technically an error
                        while(x < x2)
                              a[x++] = dataByte;
                  }
                  else
                        a[x++] = dataByte;
            }
            while(x < image_width)
                  a[x++] = 0;
      }

      a = image_buffer;
      b = pbuf;

      for(x = 0;x < image_width*image_height;x++)
      {
            y = *b++ * 3;
            *a++ = palette[y+2];
            *a++ = palette[y+1];
            *a++ = palette[y];
            *a++ = 255;
      }

      return image_buffer;
}

/*
============
LoadPCX
============
*/
qboolean LoadPCX_QWSkin(const unsigned char *f, int filesize, unsigned char *pixels, int outwidth, int outheight)
{
      pcx_t pcx;
      unsigned char *a;
      const unsigned char *fin, *enddata;
      int x, y, x2, dataByte, pcxwidth, pcxheight;

      if (filesize < (int)sizeof(pcx) + 768)
            return false;

      image_width = outwidth;
      image_height = outheight;
      fin = f;

      memcpy(&pcx, fin, sizeof(pcx));
      fin += sizeof(pcx);

      // LordHavoc: big-endian support ported from QF newtree
      pcx.xmax = LittleShort (pcx.xmax);
      pcx.xmin = LittleShort (pcx.xmin);
      pcx.ymax = LittleShort (pcx.ymax);
      pcx.ymin = LittleShort (pcx.ymin);
      pcx.hres = LittleShort (pcx.hres);
      pcx.vres = LittleShort (pcx.vres);
      pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
      pcx.palette_type = LittleShort (pcx.palette_type);

      pcxwidth = pcx.xmax + 1 - pcx.xmin;
      pcxheight = pcx.ymax + 1 - pcx.ymin;
      if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || pcxwidth > 4096 || pcxheight > 4096 || pcxwidth <= 0 || pcxheight <= 0)
            return false;

      enddata = f + filesize - 768;

      for (y = 0;y < outheight && fin < enddata;y++)
      {
            a = pixels + y * outwidth;
            // pad the output with blank lines if needed
            if (y >= pcxheight)
            {
                  memset(a, 0, outwidth);
                  continue;
            }
            for (x = 0;x < pcxwidth;)
            {
                  if (fin >= enddata)
                        return false;
                  dataByte = *fin++;
                  if(dataByte >= 0xC0)
                  {
                        x2 = x + (dataByte & 0x3F);
                        if (fin >= enddata)
                              return false;
                        if (x2 > pcxwidth)
                              return false;
                        dataByte = *fin++;
                        for (;x < x2;x++)
                              if (x < outwidth)
                                    a[x] = dataByte;
                  }
                  else
                  {
                        if (x < outwidth) // truncate to destination width
                              a[x] = dataByte;
                        x++;
                  }
            }
            while(x < outwidth)
                  a[x++] = 0;
      }

      return true;
}

/*
=========================================================

TARGA LOADING

=========================================================
*/

00365 typedef struct _TargaHeader
{
      unsigned char     id_length, colormap_type, image_type;
      unsigned short    colormap_index, colormap_length;
      unsigned char     colormap_size;
      unsigned short    x_origin, y_origin, width, height;
      unsigned char     pixel_size, attributes;
}
TargaHeader;

void PrintTargaHeader(TargaHeader *t)
{
      Con_Printf("TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
}

/*
=============
LoadTGA
=============
*/
unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize, int *miplevel)
{
      int x, y, pix_inc, row_inci, runlen, alphabits;
      unsigned char *image_buffer;
      unsigned int *pixbufi;
      const unsigned char *fin, *enddata;
      TargaHeader targa_header;
      unsigned int palettei[256];
      union
      {
            unsigned int i;
            unsigned char b[4];
      }
      bgra;

      if (filesize < 19)
            return NULL;

      enddata = f + filesize;

      targa_header.id_length = f[0];
      targa_header.colormap_type = f[1];
      targa_header.image_type = f[2];

      targa_header.colormap_index = f[3] + f[4] * 256;
      targa_header.colormap_length = f[5] + f[6] * 256;
      targa_header.colormap_size = f[7];
      targa_header.x_origin = f[8] + f[9] * 256;
      targa_header.y_origin = f[10] + f[11] * 256;
      targa_header.width = image_width = f[12] + f[13] * 256;
      targa_header.height = image_height = f[14] + f[15] * 256;
      targa_header.pixel_size = f[16];
      targa_header.attributes = f[17];

      if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
      {
            Con_Print("LoadTGA: invalid size\n");
            PrintTargaHeader(&targa_header);
            return NULL;
      }

      // advance to end of header
      fin = f + 18;

      // skip TARGA image comment (usually 0 bytes)
      fin += targa_header.id_length;

      // read/skip the colormap if present (note: according to the TARGA spec it
      // can be present even on truecolor or greyscale images, just not used by
      // the image data)
      if (targa_header.colormap_type)
      {
            if (targa_header.colormap_length > 256)
            {
                  Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
                  PrintTargaHeader(&targa_header);
                  return NULL;
            }
            if (targa_header.colormap_index)
            {
                  Con_Print("LoadTGA: colormap_index not supported\n");
                  PrintTargaHeader(&targa_header);
                  return NULL;
            }
            if (targa_header.colormap_size == 24)
            {
                  for (x = 0;x < targa_header.colormap_length;x++)
                  {
                        bgra.b[0] = *fin++;
                        bgra.b[1] = *fin++;
                        bgra.b[2] = *fin++;
                        bgra.b[3] = 255;
                        palettei[x] = bgra.i;
                  }
            }
            else if (targa_header.colormap_size == 32)
            {
                  memcpy(palettei, fin, targa_header.colormap_length*4);
                  fin += targa_header.colormap_length * 4;
            }
            else
            {
                  Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
                  PrintTargaHeader(&targa_header);
                  return NULL;
            }
      }

      // check our pixel_size restrictions according to image_type
      switch (targa_header.image_type & ~8)
      {
      case 2:
            if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
            {
                  Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
                  PrintTargaHeader(&targa_header);
                  return NULL;
            }
            break;
      case 3:
            // set up a palette to make the loader easier
            for (x = 0;x < 256;x++)
            {
                  bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
                  bgra.b[3] = 255;
                  palettei[x] = bgra.i;
            }
            // fall through to colormap case
      case 1:
            if (targa_header.pixel_size != 8)
            {
                  Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
                  PrintTargaHeader(&targa_header);
                  return NULL;
            }
            break;
      default:
            Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
            PrintTargaHeader(&targa_header);
            return NULL;
      }

      if (targa_header.attributes & 0x10)
      {
            Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
            return NULL;
      }

      // number of attribute bits per pixel, we only support 0 or 8
      alphabits = targa_header.attributes & 0x0F;
      if (alphabits != 8 && alphabits != 0)
      {
            Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
            return NULL;
      }

      image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
      if (!image_buffer)
      {
            Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
            return NULL;
      }

      // If bit 5 of attributes isn't set, the image has been stored from bottom to top
      if ((targa_header.attributes & 0x20) == 0)
      {
            pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
            row_inci = -image_width*2;
      }
      else
      {
            pixbufi = (unsigned int*)image_buffer;
            row_inci = 0;
      }

      x = 0;
      y = 0;
      pix_inc = 1;
      if ((targa_header.image_type & ~8) == 2)
            pix_inc = (targa_header.pixel_size + 7) / 8;
      switch (targa_header.image_type)
      {
      case 1: // colormapped, uncompressed
      case 3: // greyscale, uncompressed
            if (fin + image_width * image_height * pix_inc > enddata)
                  break;
            for (y = 0;y < image_height;y++, pixbufi += row_inci)
                  for (x = 0;x < image_width;x++)
                        *pixbufi++ = palettei[*fin++];
            break;
      case 2:
            // BGR or BGRA, uncompressed
            if (fin + image_width * image_height * pix_inc > enddata)
                  break;
            if (targa_header.pixel_size == 32 && alphabits)
            {
                  for (y = 0;y < image_height;y++)
                        memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
            }
            else
            {
                  for (y = 0;y < image_height;y++, pixbufi += row_inci)
                  {
                        for (x = 0;x < image_width;x++, fin += pix_inc)
                        {
                              bgra.b[0] = fin[0];
                              bgra.b[1] = fin[1];
                              bgra.b[2] = fin[2];
                              bgra.b[3] = 255;
                              *pixbufi++ = bgra.i;
                        }
                  }
            }
            break;
      case 9: // colormapped, RLE
      case 11: // greyscale, RLE
            for (y = 0;y < image_height;y++, pixbufi += row_inci)
            {
                  for (x = 0;x < image_width;)
                  {
                        if (fin >= enddata)
                              break; // error - truncated file
                        runlen = *fin++;
                        if (runlen & 0x80)
                        {
                              // RLE - all pixels the same color
                              runlen += 1 - 0x80;
                              if (fin + pix_inc > enddata)
                                    break; // error - truncated file
                              if (x + runlen > image_width)
                                    break; // error - line exceeds width
                              bgra.i = palettei[*fin++];
                              for (;runlen--;x++)
                                    *pixbufi++ = bgra.i;
                        }
                        else
                        {
                              // uncompressed - all pixels different color
                              runlen++;
                              if (fin + pix_inc * runlen > enddata)
                                    break; // error - truncated file
                              if (x + runlen > image_width)
                                    break; // error - line exceeds width
                              for (;runlen--;x++)
                                    *pixbufi++ = palettei[*fin++];
                        }
                  }

                  if (x != image_width)
                  {
                        // pixbufi is useless now
                        Con_Printf("LoadTGA: corrupt file\n");
                        break;
                  }
            }
            break;
      case 10:
            // BGR or BGRA, RLE
            if (targa_header.pixel_size == 32 && alphabits)
            {
                  for (y = 0;y < image_height;y++, pixbufi += row_inci)
                  {
                        for (x = 0;x < image_width;)
                        {
                              if (fin >= enddata)
                                    break; // error - truncated file
                              runlen = *fin++;
                              if (runlen & 0x80)
                              {
                                    // RLE - all pixels the same color
                                    runlen += 1 - 0x80;
                                    if (fin + pix_inc > enddata)
                                          break; // error - truncated file
                                    if (x + runlen > image_width)
                                          break; // error - line exceeds width
                                    bgra.b[0] = fin[0];
                                    bgra.b[1] = fin[1];
                                    bgra.b[2] = fin[2];
                                    bgra.b[3] = fin[3];
                                    fin += pix_inc;
                                    for (;runlen--;x++)
                                          *pixbufi++ = bgra.i;
                              }
                              else
                              {
                                    // uncompressed - all pixels different color
                                    runlen++;
                                    if (fin + pix_inc * runlen > enddata)
                                          break; // error - truncated file
                                    if (x + runlen > image_width)
                                          break; // error - line exceeds width
                                    for (;runlen--;x++)
                                    {
                                          bgra.b[0] = fin[0];
                                          bgra.b[1] = fin[1];
                                          bgra.b[2] = fin[2];
                                          bgra.b[3] = fin[3];
                                          fin += pix_inc;
                                          *pixbufi++ = bgra.i;
                                    }
                              }
                        }

                        if (x != image_width)
                        {
                              // pixbufi is useless now
                              Con_Printf("LoadTGA: corrupt file\n");
                              break;
                        }
                  }
            }
            else
            {
                  for (y = 0;y < image_height;y++, pixbufi += row_inci)
                  {
                        for (x = 0;x < image_width;)
                        {
                              if (fin >= enddata)
                                    break; // error - truncated file
                              runlen = *fin++;
                              if (runlen & 0x80)
                              {
                                    // RLE - all pixels the same color
                                    runlen += 1 - 0x80;
                                    if (fin + pix_inc > enddata)
                                          break; // error - truncated file
                                    if (x + runlen > image_width)
                                          break; // error - line exceeds width
                                    bgra.b[0] = fin[0];
                                    bgra.b[1] = fin[1];
                                    bgra.b[2] = fin[2];
                                    bgra.b[3] = 255;
                                    fin += pix_inc;
                                    for (;runlen--;x++)
                                          *pixbufi++ = bgra.i;
                              }
                              else
                              {
                                    // uncompressed - all pixels different color
                                    runlen++;
                                    if (fin + pix_inc * runlen > enddata)
                                          break; // error - truncated file
                                    if (x + runlen > image_width)
                                          break; // error - line exceeds width
                                    for (;runlen--;x++)
                                    {
                                          bgra.b[0] = fin[0];
                                          bgra.b[1] = fin[1];
                                          bgra.b[2] = fin[2];
                                          bgra.b[3] = 255;
                                          fin += pix_inc;
                                          *pixbufi++ = bgra.i;
                                    }
                              }
                        }

                        if (x != image_width)
                        {
                              // pixbufi is useless now
                              Con_Printf("LoadTGA: corrupt file\n");
                              break;
                        }
                  }
            }
            break;
      default:
            // unknown image_type
            break;
      }

      return image_buffer;
}

00738 typedef struct q2wal_s
{
      char        name[32];
      unsigned    width, height;
      unsigned    offsets[MIPLEVELS];           // four mip maps stored
      char        animname[32];                 // next frame in animation chain
      int               flags;
      int               contents;
      int               value;
} q2wal_t;

unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize, int *miplevel)
{
      unsigned char *image_buffer;
      const q2wal_t *inwal = (const q2wal_t *)f;

      if (filesize < (int) sizeof(q2wal_t))
      {
            Con_Print("LoadWAL: invalid WAL file\n");
            return NULL;
      }

      image_width = LittleLong(inwal->width);
      image_height = LittleLong(inwal->height);
      if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
      {
            Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
            return NULL;
      }

      if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
      {
            Con_Print("LoadWAL: invalid WAL file\n");
            return NULL;
      }

      image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
      if (!image_buffer)
      {
            Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
            return NULL;
      }
      Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, palette_bgra_complete);
      return image_buffer;
}


void Image_StripImageExtension (const char *in, char *out, size_t size_out)
{
      const char *ext;

      if (size_out == 0)
            return;

      ext = FS_FileExtension(in);
      if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
            FS_StripExtension(in, out, size_out);
      else
            strlcpy(out, in, size_out);
}

static unsigned char image_linearfromsrgb[256];

void Image_MakeLinearColorsFromsRGB(unsigned char *pout, const unsigned char *pin, int numpixels)
{
      int i;
      // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
      if (!image_linearfromsrgb[255])
            for (i = 0;i < 256;i++)
                  image_linearfromsrgb[i] = (unsigned char)(Image_LinearFloatFromsRGB(i) * 256.0f);
      for (i = 0;i < numpixels;i++)
      {
            pout[i*4+0] = image_linearfromsrgb[pin[i*4+0]];
            pout[i*4+1] = image_linearfromsrgb[pin[i*4+1]];
            pout[i*4+2] = image_linearfromsrgb[pin[i*4+2]];
            pout[i*4+3] = pin[i*4+3];
      }
}

00817 typedef struct imageformat_s
{
      const char *formatstring;
      unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int *miplevel);
}
imageformat_t;

// GAME_TENEBRAE only
imageformat_t imageformats_tenebrae[] =
{
      {"override/%s.tga", LoadTGA_BGRA},
      {"override/%s.png", PNG_LoadImage_BGRA},
      {"override/%s.jpg", JPEG_LoadImage_BGRA},
      {"override/%s.pcx", LoadPCX_BGRA},
      {"%s.tga", LoadTGA_BGRA},
      {"%s.png", PNG_LoadImage_BGRA},
      {"%s.jpg", JPEG_LoadImage_BGRA},
      {"%s.pcx", LoadPCX_BGRA},
      {NULL, NULL}
};

imageformat_t imageformats_nopath[] =
{
      {"override/%s.tga", LoadTGA_BGRA},
      {"override/%s.png", PNG_LoadImage_BGRA},
      {"override/%s.jpg", JPEG_LoadImage_BGRA},
      {"textures/%s.tga", LoadTGA_BGRA},
      {"textures/%s.png", PNG_LoadImage_BGRA},
      {"textures/%s.jpg", JPEG_LoadImage_BGRA},
      {"%s.tga", LoadTGA_BGRA},
      {"%s.png", PNG_LoadImage_BGRA},
      {"%s.jpg", JPEG_LoadImage_BGRA},
      {"%s.pcx", LoadPCX_BGRA},
      {NULL, NULL}
};

// GAME_DELUXEQUAKE only
// VorteX: the point why i use such messy texture paths is
// that GtkRadiant can't detect normal/gloss textures
// and exclude them from texture browser
// so i just use additional folder to store this textures
imageformat_t imageformats_dq[] =
{
      {"%s.tga", LoadTGA_BGRA},
      {"%s.jpg", JPEG_LoadImage_BGRA},
      {"texturemaps/%s.tga", LoadTGA_BGRA},
      {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
      {NULL, NULL}
};

imageformat_t imageformats_textures[] =
{
      {"%s.tga", LoadTGA_BGRA},
      {"%s.png", PNG_LoadImage_BGRA},
      {"%s.jpg", JPEG_LoadImage_BGRA},
      {"%s.pcx", LoadPCX_BGRA},
      {"%s.wal", LoadWAL_BGRA},
      {NULL, NULL}
};

imageformat_t imageformats_gfx[] =
{
      {"%s.tga", LoadTGA_BGRA},
      {"%s.png", PNG_LoadImage_BGRA},
      {"%s.jpg", JPEG_LoadImage_BGRA},
      {"%s.pcx", LoadPCX_BGRA},
      {NULL, NULL}
};

imageformat_t imageformats_other[] =
{
      {"%s.tga", LoadTGA_BGRA},
      {"%s.png", PNG_LoadImage_BGRA},
      {"%s.jpg", JPEG_LoadImage_BGRA},
      {"%s.pcx", LoadPCX_BGRA},
      {NULL, NULL}
};

int fixtransparentpixels(unsigned char *data, int w, int h);
unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans, qboolean convertsRGB, int *miplevel)
{
      fs_offset_t filesize;
      imageformat_t *firstformat, *format;
      unsigned char *f, *data = NULL, *data2 = NULL;
      char basename[MAX_QPATH], name[MAX_QPATH], name2[MAX_QPATH], *c;
      //if (developer_memorydebug.integer)
      //    Mem_CheckSentinelsGlobal();
      if (developer_texturelogging.integer)
            Log_Printf("textures.log", "%s\n", filename);
      Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
      // replace *'s with #, so commandline utils don't get confused when dealing with the external files
      for (c = basename;*c;c++)
            if (*c == '*')
                  *c = '#';
      name[0] = 0;
      if (strchr(basename, '/'))
      {
            int i;
            for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
                  name[i] = basename[i];
            name[i] = 0;
      }
      if (gamemode == GAME_TENEBRAE)
            firstformat = imageformats_tenebrae;
      else if (gamemode == GAME_DELUXEQUAKE)
            firstformat = imageformats_dq;
      else if (!strcasecmp(name, "textures"))
            firstformat = imageformats_textures;
      else if (!strcasecmp(name, "gfx"))
            firstformat = imageformats_gfx;
      else if (!strchr(basename, '/'))
            firstformat = imageformats_nopath;
      else
            firstformat = imageformats_other;
      // now try all the formats in the selected list
      for (format = firstformat;format->formatstring;format++)
      {
            dpsnprintf (name, sizeof(name), format->formatstring, basename);
            f = FS_LoadFile(name, tempmempool, true, &filesize);
            if (f)
            {
                  int mymiplevel = miplevel ? *miplevel : 0;
                  data = format->loadfunc(f, (int)filesize, &mymiplevel);
                  Mem_Free(f);
                  if (data)
                  {
                        if(format->loadfunc == JPEG_LoadImage_BGRA) // jpeg can't do alpha, so let's simulate it by loading another jpeg
                        {
                              dpsnprintf (name2, sizeof(name2), format->formatstring, va("%s_alpha", basename));
                              f = FS_LoadFile(name2, tempmempool, true, &filesize);
                              if(f)
                              {
                                    int mymiplevel2 = miplevel ? *miplevel : 0;
                                    data2 = format->loadfunc(f, (int)filesize, &mymiplevel2);
                                    if(mymiplevel != mymiplevel2)
                                          Host_Error("loadimagepixelsbgra: miplevels differ");
                                    Mem_Free(f);
                                    Image_CopyAlphaFromBlueBGRA(data, data2, image_width, image_height);
                                    Mem_Free(data2);
                              }
                        }
                        if (developer_loading.integer)
                              Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
                        if(miplevel)
                              *miplevel = mymiplevel;
                        //if (developer_memorydebug.integer)
                        //    Mem_CheckSentinelsGlobal();
                        if(allowFixtrans && r_fixtrans_auto.integer)
                        {
                              int n = fixtransparentpixels(data, image_width, image_height);
                              if(n)
                              {
                                    Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
                                    if(r_fixtrans_auto.integer >= 2)
                                    {
                                          char outfilename[MAX_QPATH], buf[MAX_QPATH];
                                          Image_StripImageExtension(name, buf, sizeof(buf));
                                          dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
                                          Image_WriteTGABGRA(outfilename, image_width, image_height, data);
                                          Con_Printf("- %s written.\n", outfilename);
                                    }
                              }
                        }
                        if (convertsRGB)
                              Image_MakeLinearColorsFromsRGB(data, data, image_width * image_height);
                        return data;
                  }
                  else
                        Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
            }
      }
      if (complain)
      {
            Con_Printf("Couldn't load %s using ", filename);
            for (format = firstformat;format->formatstring;format++)
            {
                  dpsnprintf (name, sizeof(name), format->formatstring, basename);
                  Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
            }
      }

      // texture loading can take a while, so make sure we're sending keepalives
      CL_KeepaliveMessage(false);

      //if (developer_memorydebug.integer)
      //    Mem_CheckSentinelsGlobal();
      return NULL;
}

extern cvar_t gl_picmip;
rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans, qboolean sRGB)
{
      unsigned char *data;
      rtexture_t *rt;
      int miplevel = R_PicmipForFlags(flags);
      if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans, false, &miplevel)))
            return 0;
      rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, sRGB ? TEXTYPE_SRGB_BGRA : TEXTYPE_BGRA, flags, miplevel, NULL);
      Mem_Free(data);
      return rt;
}

int fixtransparentpixels(unsigned char *data, int w, int h)
{
      int const FIXTRANS_NEEDED = 1;
      int const FIXTRANS_HAS_L = 2;
      int const FIXTRANS_HAS_R = 4;
      int const FIXTRANS_HAS_U = 8;
      int const FIXTRANS_HAS_D = 16;
      int const FIXTRANS_FIXED = 32;
      unsigned char *fixMask = (unsigned char *) Mem_Alloc(tempmempool, w * h);
      int fixPixels = 0;
      int changedPixels = 0;
      int x, y;

#define FIXTRANS_PIXEL (y*w+x)
#define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
#define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
#define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
#define FIXTRANS_PIXEL_R (y*w+((x+1)%w))

      memset(fixMask, 0, w * h);
      for(y = 0; y < h; ++y)
            for(x = 0; x < w; ++x)
            {
                  if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
                  {
                        fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
                        ++fixPixels;
                  }
                  else
                  {
                        fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
                        fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
                        fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
                        fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
                  }
            }
      if(fixPixels == w * h)
            return 0; // sorry, can't do anything about this
      while(fixPixels)
      {
            for(y = 0; y < h; ++y)
                  for(x = 0; x < w; ++x)
                        if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
                        {
                              unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
                              unsigned char r, g, b, a, r0, g0, b0;
                              if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
                              {
                                    r = data[FIXTRANS_PIXEL_U * 4 + 2];
                                    g = data[FIXTRANS_PIXEL_U * 4 + 1];
                                    b = data[FIXTRANS_PIXEL_U * 4 + 0];
                                    a = data[FIXTRANS_PIXEL_U * 4 + 3];
                                    sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
                              }
                              if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
                              {
                                    r = data[FIXTRANS_PIXEL_D * 4 + 2];
                                    g = data[FIXTRANS_PIXEL_D * 4 + 1];
                                    b = data[FIXTRANS_PIXEL_D * 4 + 0];
                                    a = data[FIXTRANS_PIXEL_D * 4 + 3];
                                    sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
                              }
                              if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
                              {
                                    r = data[FIXTRANS_PIXEL_L * 4 + 2];
                                    g = data[FIXTRANS_PIXEL_L * 4 + 1];
                                    b = data[FIXTRANS_PIXEL_L * 4 + 0];
                                    a = data[FIXTRANS_PIXEL_L * 4 + 3];
                                    sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
                              }
                              if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
                              {
                                    r = data[FIXTRANS_PIXEL_R * 4 + 2];
                                    g = data[FIXTRANS_PIXEL_R * 4 + 1];
                                    b = data[FIXTRANS_PIXEL_R * 4 + 0];
                                    a = data[FIXTRANS_PIXEL_R * 4 + 3];
                                    sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
                              }
                              if(!cnt)
                                    continue;
                              r0 = data[FIXTRANS_PIXEL * 4 + 2];
                              g0 = data[FIXTRANS_PIXEL * 4 + 1];
                              b0 = data[FIXTRANS_PIXEL * 4 + 0];
                              if(sumA)
                              {
                                    // there is a surrounding non-alpha pixel
                                    r = (sumRA + sumA / 2) / sumA;
                                    g = (sumGA + sumA / 2) / sumA;
                                    b = (sumBA + sumA / 2) / sumA;
                              }
                              else
                              {
                                    // need to use a "regular" average
                                    r = (sumR + cnt / 2) / cnt;
                                    g = (sumG + cnt / 2) / cnt;
                                    b = (sumB + cnt / 2) / cnt;
                              }
                              if(r != r0 || g != g0 || b != b0)
                                    ++changedPixels;
                              data[FIXTRANS_PIXEL * 4 + 2] = r;
                              data[FIXTRANS_PIXEL * 4 + 1] = g;
                              data[FIXTRANS_PIXEL * 4 + 0] = b;
                              fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
                        }
            for(y = 0; y < h; ++y)
                  for(x = 0; x < w; ++x)
                        if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
                        {
                              fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
                              fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
                              fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
                              fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
                              fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
                              --fixPixels;
                        }
      }
      return changedPixels;
}

void Image_FixTransparentPixels_f(void)
{
      const char *filename, *filename_pattern;
      fssearch_t *search;
      int i, n;
      char outfilename[MAX_QPATH], buf[MAX_QPATH];
      unsigned char *data;
      if(Cmd_Argc() != 2)
      {
            Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
            return;
      }
      filename_pattern = Cmd_Argv(1);
      search = FS_Search(filename_pattern, true, true);
      if(!search)
            return;
      for(i = 0; i < search->numfilenames; ++i)
      {
            filename = search->filenames[i];
            Con_Printf("Processing %s... ", filename);
            Image_StripImageExtension(filename, buf, sizeof(buf));
            dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
            if(!(data = loadimagepixelsbgra(filename, true, false, false, NULL)))
                  return;
            if((n = fixtransparentpixels(data, image_width, image_height)))
            {
                  Image_WriteTGABGRA(outfilename, image_width, image_height, data);
                  Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
            }
            else
                  Con_Printf("unchanged.\n");
            Mem_Free(data);
      }
      FS_FreeSearch(search);
}

qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data)
{
      qboolean ret;
      unsigned char buffer[18];
      const void *buffers[2];
      fs_offset_t sizes[2];

      memset (buffer, 0, 18);
      buffer[2] = 2;          // uncompressed type
      buffer[12] = (width >> 0) & 0xFF;
      buffer[13] = (width >> 8) & 0xFF;
      buffer[14] = (height >> 0) & 0xFF;
      buffer[15] = (height >> 8) & 0xFF;
      buffer[16] = 24;  // pixel size

      buffers[0] = buffer;
      sizes[0] = 18;
      buffers[1] = data;
      sizes[1] = width*height*3;
      ret = FS_WriteFileInBlocks(filename, buffers, sizes, 2);

      return ret;
}

qboolean Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
{
      int y;
      unsigned char *buffer, *out;
      const unsigned char *in, *end;
      qboolean ret;

      buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);

      memset (buffer, 0, 18);
      buffer[2] = 2;          // uncompressed type
      buffer[12] = (width >> 0) & 0xFF;
      buffer[13] = (width >> 8) & 0xFF;
      buffer[14] = (height >> 0) & 0xFF;
      buffer[15] = (height >> 8) & 0xFF;

      for (y = 3;y < width*height*4;y += 4)
            if (data[y] < 255)
                  break;

      if (y < width*height*4)
      {
            // save the alpha channel
            buffer[16] = 32;  // pixel size
            buffer[17] = 8; // 8 bits of alpha

            // flip upside down
            out = buffer + 18;
            for (y = height - 1;y >= 0;y--)
            {
                  memcpy(out, data + y * width * 4, width * 4);
                  out += width*4;
            }
      }
      else
      {
            // save only the color channels
            buffer[16] = 24;  // pixel size
            buffer[17] = 0; // 8 bits of alpha

            // truncate bgra to bgr and flip upside down
            out = buffer + 18;
            for (y = height - 1;y >= 0;y--)
            {
                  in = data + y * width * 4;
                  end = in + width * 4;
                  for (;in < end;in += 4)
                  {
                        *out++ = in[0];
                        *out++ = in[1];
                        *out++ = in[2];
                  }
            }
      }
      ret = FS_WriteFile (filename, buffer, out - buffer);

      Mem_Free(buffer);

      return ret;
}

static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
{
      int         j, xi, oldx = 0, f, fstep, endx, lerp;
      fstep = (int) (inwidth*65536.0f/outwidth);
      endx = (inwidth-1);
      for (j = 0,f = 0;j < outwidth;j++, f += fstep)
      {
            xi = f >> 16;
            if (xi != oldx)
            {
                  in += (xi - oldx) * 4;
                  oldx = xi;
            }
            if (xi < endx)
            {
                  lerp = f & 0xFFFF;
                  *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
                  *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
                  *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
                  *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
            }
            else // last pixel of the line has no pixel to lerp to
            {
                  *out++ = in[0];
                  *out++ = in[1];
                  *out++ = in[2];
                  *out++ = in[3];
            }
      }
}

#define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
{
      int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
      unsigned char *out;
      const unsigned char *inrow;
      unsigned char *resamplerow1;
      unsigned char *resamplerow2;
      out = (unsigned char *)outdata;
      fstep = (int) (inheight*65536.0f/outheight);

      resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
      resamplerow2 = resamplerow1 + outwidth*4;

      inrow = (const unsigned char *)indata;
      oldy = 0;
      Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
      Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
      for (i = 0, f = 0;i < outheight;i++,f += fstep)
      {
            yi = f >> 16;
            if (yi < endy)
            {
                  lerp = f & 0xFFFF;
                  if (yi != oldy)
                  {
                        inrow = (unsigned char *)indata + inwidth4*yi;
                        if (yi == oldy+1)
                              memcpy(resamplerow1, resamplerow2, outwidth4);
                        else
                              Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
                        Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
                        oldy = yi;
                  }
                  j = outwidth - 4;
                  while(j >= 0)
                  {
                        LERPBYTE( 0);
                        LERPBYTE( 1);
                        LERPBYTE( 2);
                        LERPBYTE( 3);
                        LERPBYTE( 4);
                        LERPBYTE( 5);
                        LERPBYTE( 6);
                        LERPBYTE( 7);
                        LERPBYTE( 8);
                        LERPBYTE( 9);
                        LERPBYTE(10);
                        LERPBYTE(11);
                        LERPBYTE(12);
                        LERPBYTE(13);
                        LERPBYTE(14);
                        LERPBYTE(15);
                        out += 16;
                        resamplerow1 += 16;
                        resamplerow2 += 16;
                        j -= 4;
                  }
                  if (j & 2)
                  {
                        LERPBYTE( 0);
                        LERPBYTE( 1);
                        LERPBYTE( 2);
                        LERPBYTE( 3);
                        LERPBYTE( 4);
                        LERPBYTE( 5);
                        LERPBYTE( 6);
                        LERPBYTE( 7);
                        out += 8;
                        resamplerow1 += 8;
                        resamplerow2 += 8;
                  }
                  if (j & 1)
                  {
                        LERPBYTE( 0);
                        LERPBYTE( 1);
                        LERPBYTE( 2);
                        LERPBYTE( 3);
                        out += 4;
                        resamplerow1 += 4;
                        resamplerow2 += 4;
                  }
                  resamplerow1 -= outwidth4;
                  resamplerow2 -= outwidth4;
            }
            else
            {
                  if (yi != oldy)
                  {
                        inrow = (unsigned char *)indata + inwidth4*yi;
                        if (yi == oldy+1)
                              memcpy(resamplerow1, resamplerow2, outwidth4);
                        else
                              Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
                        oldy = yi;
                  }
                  memcpy(out, resamplerow1, outwidth4);
            }
      }

      Mem_Free(resamplerow1);
      resamplerow1 = NULL;
      resamplerow2 = NULL;
}

void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
{
      int i, j;
      unsigned frac, fracstep;
      // relies on int being 4 bytes
      int *inrow, *out;
      out = (int *)outdata;

      fracstep = inwidth*0x10000/outwidth;
      for (i = 0;i < outheight;i++)
      {
            inrow = (int *)indata + inwidth*(i*inheight/outheight);
            frac = fracstep >> 1;
            j = outwidth - 4;
            while (j >= 0)
            {
                  out[0] = inrow[frac >> 16];frac += fracstep;
                  out[1] = inrow[frac >> 16];frac += fracstep;
                  out[2] = inrow[frac >> 16];frac += fracstep;
                  out[3] = inrow[frac >> 16];frac += fracstep;
                  out += 4;
                  j -= 4;
            }
            if (j & 2)
            {
                  out[0] = inrow[frac >> 16];frac += fracstep;
                  out[1] = inrow[frac >> 16];frac += fracstep;
                  out += 2;
            }
            if (j & 1)
            {
                  out[0] = inrow[frac >> 16];frac += fracstep;
                  out += 1;
            }
      }
}

/*
================
Image_Resample
================
*/
void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
{
      if (indepth != 1 || outdepth != 1)
      {
            Con_Printf ("Image_Resample: 3D resampling not supported\n");
            return;
      }
      if (quality)
            Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
      else
            Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
}

// in can be the same as out
void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
{
      const unsigned char *inrow;
      int x, y, nextrow;
      if (*depth != 1 || destdepth != 1)
      {
            Con_Printf ("Image_Resample: 3D resampling not supported\n");
            if (*width > destwidth)
                  *width >>= 1;
            if (*height > destheight)
                  *height >>= 1;
            if (*depth > destdepth)
                  *depth >>= 1;
            return;
      }
      // note: if given odd width/height this discards the last row/column of
      // pixels, rather than doing a proper box-filter scale down
      inrow = in;
      nextrow = *width * 4;
      if (*width > destwidth)
      {
            *width >>= 1;
            if (*height > destheight)
            {
                  // reduce both
                  *height >>= 1;
                  for (y = 0;y < *height;y++, inrow += nextrow * 2)
                  {
                        for (in = inrow, x = 0;x < *width;x++)
                        {
                              out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
                              out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
                              out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
                              out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
                              out += 4;
                              in += 8;
                        }
                  }
            }
            else
            {
                  // reduce width
                  for (y = 0;y < *height;y++, inrow += nextrow)
                  {
                        for (in = inrow, x = 0;x < *width;x++)
                        {
                              out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
                              out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
                              out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
                              out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
                              out += 4;
                              in += 8;
                        }
                  }
            }
      }
      else
      {
            if (*height > destheight)
            {
                  // reduce height
                  *height >>= 1;
                  for (y = 0;y < *height;y++, inrow += nextrow * 2)
                  {
                        for (in = inrow, x = 0;x < *width;x++)
                        {
                              out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
                              out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
                              out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
                              out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
                              out += 4;
                              in += 4;
                        }
                  }
            }
            else
                  Con_Printf ("Image_MipReduce: desired size already achieved\n");
      }
}

void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
{
      int x, y, x1, x2, y1, y2;
      const unsigned char *b, *row[3];
      int p[5];
      unsigned char *out;
      float ibumpscale, n[3];
      ibumpscale = (255.0f * 6.0f) / bumpscale;
      out = outpixels;
      for (y = 0, y1 = height-1;y < height;y1 = y, y++)
      {
            y2 = y + 1;if (y2 >= height) y2 = 0;
            row[0] = inpixels + (y1 * width) * 4;
            row[1] = inpixels + (y  * width) * 4;
            row[2] = inpixels + (y2 * width) * 4;
            for (x = 0, x1 = width-1;x < width;x1 = x, x++)
            {
                  x2 = x + 1;if (x2 >= width) x2 = 0;
                  // left, right
                  b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
                  b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
                  // above, below
                  b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
                  b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
                  // center
                  b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
                  // calculate a normal from the slopes
                  n[0] = p[0] - p[1];
                  n[1] = p[3] - p[2];
                  n[2] = ibumpscale;
                  VectorNormalize(n);
                  // turn it into a dot3 rgb vector texture
                  out[2] = (int)(128.0f + n[0] * 127.0f);
                  out[1] = (int)(128.0f + n[1] * 127.0f);
                  out[0] = (int)(128.0f + n[2] * 127.0f);
                  out[3] = (p[4]) / 3;
                  out += 4;
            }
      }
}

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