diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2001-04-24 16:11:35 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2001-04-24 16:11:35 +0000 |
| commit | 8753bd89002c31f4cc747cceafbb12368424b8f3 (patch) | |
| tree | 982b6b9c4366f8ce88e8179b5aea3b95f386f832 | |
| parent | 691f58930b84f5baa566052a270dc2df05806a81 (diff) | |
fixed problems with texel component size queries in glGetTexLevelParameter()
| -rw-r--r-- | src/mesa/main/texstate.c | 50 |
1 files changed, 42 insertions, 8 deletions
diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c index fe80a70d30..bc9ed8b77f 100644 --- a/src/mesa/main/texstate.c +++ b/src/mesa/main/texstate.c @@ -1,4 +1,4 @@ -/* $Id: texstate.c,v 1.46 2001/04/20 19:21:41 brianp Exp $ */ +/* $Id: texstate.c,v 1.47 2001/04/24 16:11:35 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -1124,6 +1124,7 @@ _mesa_GetTexLevelParameteriv( GLenum target, GLint level, const struct gl_texture_image *img = NULL; GLuint dimensions; GLboolean isProxy; + GLenum baseIntFormat; ASSERT_OUTSIDE_BEGIN_END(ctx); if (level < 0 || level >= ctx->Const.MaxTextureLevels) { @@ -1147,6 +1148,8 @@ _mesa_GetTexLevelParameteriv( GLenum target, GLint level, return; } + baseIntFormat = _mesa_base_tex_format(ctx, img->IntFormat); + isProxy = (target == GL_PROXY_TEXTURE_1D) || (target == GL_PROXY_TEXTURE_2D) || (target == GL_PROXY_TEXTURE_3D) || @@ -1169,25 +1172,56 @@ _mesa_GetTexLevelParameteriv( GLenum target, GLint level, *params = img->Border; return; case GL_TEXTURE_RED_SIZE: - *params = img->TexFormat->RedBits; + if (baseIntFormat == GL_RGB || + baseIntFormat == GL_RGBA) + *params = img->TexFormat->RedBits; + else + *params = 0; return; case GL_TEXTURE_GREEN_SIZE: - *params = img->TexFormat->GreenBits; + if (baseIntFormat == GL_RGB || + baseIntFormat == GL_RGBA) + *params = img->TexFormat->GreenBits; + else + *params = 0; return; case GL_TEXTURE_BLUE_SIZE: - *params = img->TexFormat->BlueBits; + if (baseIntFormat == GL_RGB || + baseIntFormat == GL_RGBA) + *params = img->TexFormat->BlueBits; + else + *params = 0; return; case GL_TEXTURE_ALPHA_SIZE: - *params = img->TexFormat->AlphaBits; + if (baseIntFormat == GL_ALPHA || + baseIntFormat == GL_LUMINANCE_ALPHA || + baseIntFormat == GL_RGBA) + *params = img->TexFormat->AlphaBits; + else + *params = 0; return; case GL_TEXTURE_INTENSITY_SIZE: - *params = img->TexFormat->IntensityBits; + if (baseIntFormat != GL_INTENSITY) + *params = 0; + else if (img->TexFormat->IntensityBits > 0) + *params = img->TexFormat->IntensityBits; + else /* intensity probably stored as rgb texture */ + *params = MIN2(img->TexFormat->RedBits, img->TexFormat->GreenBits); return; case GL_TEXTURE_LUMINANCE_SIZE: - *params = img->TexFormat->LuminanceBits; + if (baseIntFormat != GL_LUMINANCE && + baseIntFormat != GL_LUMINANCE_ALPHA) + *params = 0; + else if (img->TexFormat->LuminanceBits > 0) + *params = img->TexFormat->LuminanceBits; + else /* luminance probably stored as rgb texture */ + *params = MIN2(img->TexFormat->RedBits, img->TexFormat->GreenBits); return; case GL_TEXTURE_INDEX_SIZE_EXT: - *params = img->TexFormat->IndexBits; + if (baseIntFormat == GL_COLOR_INDEX) + *params = img->TexFormat->IndexBits; + else + *params = 0; return; case GL_DEPTH_BITS: /* XXX this isn't in the GL_SGIX_depth_texture spec |