actions/itgmania212121
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Arg. This is ugly and slow, but at least it's a real linear filter.

Browse Source 
Handle extreme resizing iteratively, which gives us something like
a triangle filter--slower and probably not quite as good, but much
better than it was.
This commit is contained in:
Glenn Maynard
2002-10-30 23:36:16 +00:00
parent d754ddc550
commit f2856485aa
3 changed files with 119 additions and 135 deletions
Download Patch File Download Diff File Expand all files Collapse all files
stepmania/src/RageBitmapTexture.cpp
+24 -13
View File
@@ -183,8 +183,8 @@ void RageBitmapTexture::Create(
/* Don't use more than we were hinted to. */
src_alpha_bits = min( iAlphaBits, src_alpha_bits );
/* XXX Scan the image, and see if it actually uses its alpha channel/color key
* (if any). Reduce to 1 or 0 bits of alpha if possible. */
/* XXX Scan the image, and see if it actually uses its alpha channel/color key
* (if any). Reduce to 1 or 0 bits of alpha if possible. */
switch( src_alpha_bits ) {
case 0: fmtTexture = D3DFMT_R5G6B5; break;
@@ -250,25 +250,36 @@ void RageBitmapTexture::Create(
if( bStretch ) {
/* zoomSurface takes a ratio. I'm not sure if it's always exact; we don't
* want to accidentally create a 513x513 texture, for example (it won't just
* cause lines; it'll be copied to the texture completely wrong). */
* want to accidentally create a 513x513 texture, for example (it won't just
* cause lines; it'll be copied to the texture completely wrong). */
/* resize currently only does RGBA8888 */
if(img->format->BitsPerPixel != 32 || img->format->colorkey) {
{
int mask = 0;
ConvertSDLSurface(img, img->w, img->h, PixFmtMasks[mask][4],
PixFmtMasks[mask][0], PixFmtMasks[mask][1], PixFmtMasks[mask][2], PixFmtMasks[mask][3]);
}
SDL_Surface *dst;
dst = zoomSurface(img, float(m_iTextureWidth)/m_iImageWidth,
float(m_iTextureHeight) / m_iImageHeight, SMOOTHING_ON);
SDL_FreeSurface(img);
img = dst;
while (m_iImageWidth != m_iTextureWidth || m_iImageHeight != m_iTextureHeight) {
SDL_Surface *dst;
/* The new image size is the full texture size. */
m_iImageWidth = m_iTextureWidth;
m_iImageHeight = m_iTextureHeight;
float xscale = float(m_iTextureWidth)/m_iImageWidth;
float yscale = float(m_iTextureHeight)/m_iImageHeight;
/* Our simple filter is a simple linear filter, so it can't
* scale to less than .5 very well. If we need to go lower
* than .5, do it iteratively. */
xscale = max(xscale, .5f);
yscale = max(yscale, .5f);
dst = zoomSurface(img, xscale, yscale);
SDL_FreeSurface(img);
img = dst;
/* The new image size is the full texture size. */
m_iImageWidth = int(m_iImageWidth * xscale + .0001);
m_iImageHeight = int(m_iImageHeight * yscale + .0001);
}
}
if( bDither )