mirror of
https://github.com/UberGames/GtkRadiant.git
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389 lines
10 KiB
C++
389 lines
10 KiB
C++
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/*
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Copyright (c) 2002 Forest "LordHavoc" Hale
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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Neither the name of Forest Hale nor the names of other contributors may be used
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to endorse or promote products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "texmanip.h"
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#include <stdlib.h>
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#include "stream/textstream.h"
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static byte *row1 = NULL, *row2 = NULL;
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static int rowsize = 0;
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void R_ResampleTextureLerpLine (const byte *in, byte *out, int inwidth, int outwidth, int bytesperpixel)
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{
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int j, xi, oldx = 0, f, fstep, endx, lerp;
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#define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
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fstep = (int) (inwidth * 65536.0f / outwidth);
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endx = (inwidth - 1);
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if (bytesperpixel == 4)
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{
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for (j = 0,f = 0;j < outwidth;j++, f += fstep)
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{
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xi = f >> 16;
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if (xi != oldx)
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{
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in += (xi - oldx) * 4;
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oldx = xi;
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}
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if (xi < endx)
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{
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lerp = f & 0xFFFF;
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*out++ = (byte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
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*out++ = (byte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
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*out++ = (byte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
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*out++ = (byte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
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}
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else // last pixel of the line has no pixel to lerp to
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{
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*out++ = in[0];
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*out++ = in[1];
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*out++ = in[2];
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*out++ = in[3];
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}
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}
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}
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else if (bytesperpixel == 3)
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{
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for (j = 0, f = 0; j < outwidth; j++, f += fstep)
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{
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xi = f >> 16;
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if (xi != oldx)
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{
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in += (xi - oldx) * 3;
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oldx = xi;
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}
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if (xi < endx)
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{
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lerp = f & 0xFFFF;
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*out++ = (byte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
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*out++ = (byte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
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*out++ = (byte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
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}
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else // last pixel of the line has no pixel to lerp to
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{
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*out++ = in[0];
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*out++ = in[1];
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*out++ = in[2];
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}
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}
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}
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else
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{
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globalOutputStream() << "R_ResampleTextureLerpLine: unsupported bytesperpixel " << bytesperpixel << "\n";
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}
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}
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/*
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================
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R_ResampleTexture
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================
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*/
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void R_ResampleTexture (const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight, int bytesperpixel)
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{
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if (rowsize < outwidth * bytesperpixel)
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{
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if (row1)
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free(row1);
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if (row2)
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free(row2);
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rowsize = outwidth * bytesperpixel;
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row1 = (byte *)malloc(rowsize);
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row2 = (byte *)malloc(rowsize);
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}
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if (bytesperpixel == 4)
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{
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int i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
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byte *inrow, *out;
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out = (byte *)outdata;
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fstep = (int) (inheight * 65536.0f / outheight);
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#define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
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inrow = (byte *)indata;
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oldy = 0;
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R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
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R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
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for (i = 0, f = 0;i < outheight;i++,f += fstep)
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{
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yi = f >> 16;
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if (yi < endy)
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{
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lerp = f & 0xFFFF;
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if (yi != oldy)
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{
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inrow = (byte *)indata + inwidth4 * yi;
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if (yi == oldy+1)
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memcpy(row1, row2, outwidth4);
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else
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R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
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R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
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oldy = yi;
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}
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j = outwidth - 4;
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while(j >= 0)
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{
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LERPBYTE( 0);
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LERPBYTE( 1);
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LERPBYTE( 2);
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LERPBYTE( 3);
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LERPBYTE( 4);
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LERPBYTE( 5);
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LERPBYTE( 6);
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LERPBYTE( 7);
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LERPBYTE( 8);
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LERPBYTE( 9);
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LERPBYTE(10);
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LERPBYTE(11);
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LERPBYTE(12);
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LERPBYTE(13);
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LERPBYTE(14);
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LERPBYTE(15);
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out += 16;
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row1 += 16;
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row2 += 16;
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j -= 4;
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}
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if (j & 2)
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{
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LERPBYTE( 0);
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LERPBYTE( 1);
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LERPBYTE( 2);
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LERPBYTE( 3);
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LERPBYTE( 4);
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LERPBYTE( 5);
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LERPBYTE( 6);
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LERPBYTE( 7);
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out += 8;
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row1 += 8;
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row2 += 8;
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}
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if (j & 1)
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{
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LERPBYTE( 0);
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LERPBYTE( 1);
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LERPBYTE( 2);
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LERPBYTE( 3);
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out += 4;
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row1 += 4;
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row2 += 4;
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}
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row1 -= outwidth4;
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row2 -= outwidth4;
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}
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else
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{
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if (yi != oldy)
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{
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inrow = (byte *)indata + inwidth4*yi;
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if (yi == oldy+1)
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memcpy(row1, row2, outwidth4);
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else
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R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
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oldy = yi;
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}
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memcpy(out, row1, outwidth4);
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}
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}
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}
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else if (bytesperpixel == 3)
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{
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int i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
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byte *inrow, *out;
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out = (byte *)outdata;
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fstep = (int) (inheight*65536.0f/outheight);
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#define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
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inrow = (byte *)indata;
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oldy = 0;
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R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
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R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
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for (i = 0, f = 0;i < outheight;i++,f += fstep)
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{
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yi = f >> 16;
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if (yi < endy)
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{
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lerp = f & 0xFFFF;
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if (yi != oldy)
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{
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inrow = (byte *)indata + inwidth3*yi;
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if (yi == oldy+1)
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memcpy(row1, row2, outwidth3);
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else
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R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
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R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
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oldy = yi;
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}
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j = outwidth - 4;
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while(j >= 0)
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{
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LERPBYTE( 0);
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LERPBYTE( 1);
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LERPBYTE( 2);
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LERPBYTE( 3);
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LERPBYTE( 4);
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LERPBYTE( 5);
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LERPBYTE( 6);
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LERPBYTE( 7);
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LERPBYTE( 8);
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LERPBYTE( 9);
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LERPBYTE(10);
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LERPBYTE(11);
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out += 12;
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row1 += 12;
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row2 += 12;
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j -= 4;
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}
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if (j & 2)
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{
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LERPBYTE( 0);
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LERPBYTE( 1);
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LERPBYTE( 2);
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LERPBYTE( 3);
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LERPBYTE( 4);
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LERPBYTE( 5);
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out += 6;
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row1 += 6;
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row2 += 6;
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}
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if (j & 1)
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{
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LERPBYTE( 0);
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LERPBYTE( 1);
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LERPBYTE( 2);
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out += 3;
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row1 += 3;
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row2 += 3;
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}
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row1 -= outwidth3;
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row2 -= outwidth3;
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}
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else
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{
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if (yi != oldy)
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{
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inrow = (byte *)indata + inwidth3*yi;
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if (yi == oldy+1)
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memcpy(row1, row2, outwidth3);
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else
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R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
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oldy = yi;
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}
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memcpy(out, row1, outwidth3);
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}
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}
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}
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else
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{
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globalOutputStream() << "R_ResampleTexture: unsupported bytesperpixel " << bytesperpixel << "\n";
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}
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}
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// in can be the same as out
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void GL_MipReduce(byte *in, byte *out, int width, int height, int destwidth, int destheight)
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{
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int x, y, width2, height2, nextrow;
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if (width > destwidth)
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{
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if (height > destheight)
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{
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// reduce both
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width2 = width >> 1;
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height2 = height >> 1;
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nextrow = width << 2;
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for (y = 0;y < height2;y++)
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{
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for (x = 0;x < width2;x++)
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{
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out[0] = (byte) ((in[0] + in[4] + in[nextrow ] + in[nextrow+4]) >> 2);
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out[1] = (byte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
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out[2] = (byte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
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out[3] = (byte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
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out += 4;
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in += 8;
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}
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in += nextrow; // skip a line
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}
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}
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else
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{
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// reduce width
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width2 = width >> 1;
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for (y = 0;y < height;y++)
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{
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for (x = 0;x < width2;x++)
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{
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out[0] = (byte) ((in[0] + in[4]) >> 1);
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out[1] = (byte) ((in[1] + in[5]) >> 1);
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out[2] = (byte) ((in[2] + in[6]) >> 1);
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out[3] = (byte) ((in[3] + in[7]) >> 1);
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out += 4;
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in += 8;
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}
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}
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}
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}
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else
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{
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if (height > destheight)
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{
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// reduce height
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height2 = height >> 1;
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nextrow = width << 2;
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for (y = 0;y < height2;y++)
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{
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|
for (x = 0;x < width;x++)
|
||
|
|
{
|
||
|
|
out[0] = (byte) ((in[0] + in[nextrow ]) >> 1);
|
||
|
|
out[1] = (byte) ((in[1] + in[nextrow+1]) >> 1);
|
||
|
|
out[2] = (byte) ((in[2] + in[nextrow+2]) >> 1);
|
||
|
|
out[3] = (byte) ((in[3] + in[nextrow+3]) >> 1);
|
||
|
|
out += 4;
|
||
|
|
in += 4;
|
||
|
|
}
|
||
|
|
in += nextrow; // skip a line
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
globalOutputStream() << "GL_MipReduce: desired size already achieved\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|