KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fixed problems with texel component size queries in glGetTexLevelParameter()

This commit is contained in:
Brian Paul 2001-04-24 16:11:35 +00:00
parent 691f58930b
commit 8753bd8900
1 changed files with 42 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
src/mesa/main/texstate.c
View File

@ -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