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mesa: clamp colors to [0,1] for glGetTexImage() when format is GL_LUMINANCE

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For luminance, we add R+G+B and it seems we should always clamp in case.
This commit is contained in:
Brian Paul
2009-04-03 17:10:31 -06:00
parent b7cb6650c1
commit 35d88e1ac2
1 changed files with 6 additions and 4 deletions
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10
src/mesa/main/texstore.c
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@@ -4115,9 +4115,11 @@ _mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
* Looks like we need clamp though when going from format
* containing negative values to unsigned format.
*/
if (!type_with_negative_values(type) &&
(texImage->TexFormat->DataType == GL_FLOAT ||
texImage->TexFormat->DataType == GL_SIGNED_NORMALIZED))
if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA)
transferOps |= IMAGE_CLAMP_BIT;
else if (!type_with_negative_values(type) &&
(texImage->TexFormat->DataType == GL_FLOAT ||
texImage->TexFormat->DataType == GL_SIGNED_NORMALIZED))
transferOps |= IMAGE_CLAMP_BIT;
for (col = 0; col < width; col++) {
@@ -4144,7 +4146,7 @@ _mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
}
_mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
format, type, dest,
&ctx->Pack, transferOps, GL_TRUE);
&ctx->Pack, transferOps, GL_FALSE);
} /* format */
} /* row */
} /* img */