diff options
| -rw-r--r-- | src/mesa/main/texgetimage.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c index 818deb8e41e..42495c8c750 100644 --- a/src/mesa/main/texgetimage.c +++ b/src/mesa/main/texgetimage.c @@ -462,6 +462,15 @@ get_tex_rgba(struct gl_context *ctx, GLuint dimensions, transferOps |= IMAGE_CLAMP_BIT; } } + /* This applies to RGB, RGBA textures. if the format is either LUMINANCE + * or LUMINANCE ALPHA, luminance (L) is computed as L=R+G+B .we need to + * clamp the sum to [0,1]. + */ + else if ((format == GL_LUMINANCE || + format == GL_LUMINANCE_ALPHA) && + dataType == GL_UNSIGNED_NORMALIZED) { + transferOps |= IMAGE_CLAMP_BIT; + } if (_mesa_is_format_compressed(texImage->TexFormat)) { get_tex_rgba_compressed(ctx, dimensions, format, type, |