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