static void Image_StripImageExtension (const char *in, char *out, size_t size_out)
{
const char *end, *temp;
-
+
if (size_out == 0)
return;
Mem_CheckSentinelsGlobal();
return data;
}
+ else
+ {
+ if (developer.integer >= 1)
+ Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
+ }
}
}
if (complain)
// in can be the same as out
void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
{
+ const unsigned char *inrow;
int x, y, nextrow;
if (*depth != 1 || destdepth != 1)
{
*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 * bytesperpixel;
if (*width > destwidth)
{
*height >>= 1;
if (bytesperpixel == 4)
{
- for (y = 0;y < *height;y++)
+ for (y = 0;y < *height;y++, inrow += nextrow * 2)
{
- for (x = 0;x < *width;x++)
+ 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 += 4;
in += 8;
}
- in += nextrow; // skip a line
}
}
else if (bytesperpixel == 3)
{
- for (y = 0;y < *height;y++)
+ for (y = 0;y < *height;y++, inrow += nextrow * 2)
{
- for (x = 0;x < *width;x++)
+ for (in = inrow, x = 0;x < *width;x++)
{
out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow ] + in[nextrow+3]) >> 2);
out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
out += 3;
in += 6;
}
- in += nextrow; // skip a line
}
}
else
// reduce width
if (bytesperpixel == 4)
{
- for (y = 0;y < *height;y++)
+ for (y = 0;y < *height;y++, inrow += nextrow)
{
- for (x = 0;x < *width;x++)
+ 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);
}
else if (bytesperpixel == 3)
{
- for (y = 0;y < *height;y++)
+ for (y = 0;y < *height;y++, inrow += nextrow)
{
- for (x = 0;x < *width;x++)
+ for (in = inrow, x = 0;x < *width;x++)
{
out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
*height >>= 1;
if (bytesperpixel == 4)
{
- for (y = 0;y < *height;y++)
+ for (y = 0;y < *height;y++, inrow += nextrow * 2)
{
- for (x = 0;x < *width;x++)
+ 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 += 4;
in += 4;
}
- in += nextrow; // skip a line
}
}
else if (bytesperpixel == 3)
{
- for (y = 0;y < *height;y++)
+ for (y = 0;y < *height;y++, inrow += nextrow * 2)
{
- for (x = 0;x < *width;x++)
+ 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 += 3;
in += 3;
}
- in += nextrow; // skip a line
}
}
else
void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
{
- int x, y;
- const unsigned char *p0, *p1, *p2;
+ int x, y, x1, x2, y1, y2;
+ const unsigned char *b, *row[3];
+ int p[5];
unsigned char *out;
float iwidth, iheight, ibumpscale, n[3];
iwidth = 1.0f / width;
iheight = 1.0f / height;
- ibumpscale = (255.0f * 3.0f) / bumpscale;
+ ibumpscale = (255.0f * 6.0f) / bumpscale;
out = outpixels;
- for (y = 0;y < height;y++)
+ for (y = 0, y1 = height-1;y < height;y1 = y, y++)
{
- for (x = 0;x < width;x++)
+ 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++)
{
- p0 = inpixels + (y * width + x) * 4;
- if (x == width - 1)
- {
- if (clamp)
- p1 = inpixels + (y * width + x) * 4;
- else
- p1 = inpixels + (y * width) * 4;
- }
- else
- p1 = inpixels + (y * width + x + 1) * 4;
- if (y == height - 1)
- {
- if (clamp)
- p2 = inpixels + (y * width + x) * 4;
- else
- p2 = inpixels + x * 4;
- }
- else
- p2 = inpixels + ((y + 1) * width + x) * 4;
- /*
- dv[0][0] = iwidth;
- dv[0][1] = 0;
- dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
- dv[1][0] = 0;
- dv[1][1] = iheight;
- dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
- n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
- n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
- n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
- */
- n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
- n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
- n[2] = ibumpscale;
- VectorNormalize(n);
- /*
- // this should work for the bottom right triangle if anyone wants
- // code for that for some reason
- n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
- n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
+ 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[0] = (int)(128.0f + n[0] * 127.0f);
out[1] = (int)(128.0f + n[1] * 127.0f);
out[2] = (int)(128.0f + n[2] * 127.0f);
- out[3] = (p0[0] + p0[1] + p0[2]) / 3;
+ out[3] = (p[4]) / 3;
out += 4;
}
}
projects / xonotic / darkplaces.git / blobdiff