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document some assumptions made about compressed texture tile size

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Brian Paul
2004-07-02 16:39:59 +00:00
parent 1675058a34
commit 2371033bba
1 changed files with 6 additions and 0 deletions
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6
src/mesa/main/teximage.c
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@@ -2833,6 +2833,9 @@ compressed_texture_error_check(GLcontext *ctx, GLint dimensions,
/**
* Error checking for glCompressedTexSubImage[123]D().
* \warning There are some bad assumptions here about the size of compressed
* texture tiles (multiple of 4) used to test the validity of the
* offset and size parameters.
* \return error code or GL_NO_ERROR.
*/
static GLenum
@@ -2890,6 +2893,9 @@ compressed_subtexture_error_check(GLcontext *ctx, GLint dimensions,
if (level < 0 || level >= maxLevels)
return GL_INVALID_VALUE;
/* XXX these tests are specific to the compressed format.
* this code should be generalized in some way.
*/
if ((xoffset & 3) != 0 || (yoffset & 3) != 0)
return GL_INVALID_VALUE;