diff options
| -rw-r--r-- | src/mesa/main/lines.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/mesa/main/lines.c b/src/mesa/main/lines.c index 79bf5679d8a..e400b391325 100644 --- a/src/mesa/main/lines.c +++ b/src/mesa/main/lines.c @@ -51,6 +51,23 @@ _mesa_LineWidth( GLfloat width ) return; } + /* Page 407 (page 423 of the PDF) of the OpenGL 3.0 spec says (in the list + * of deprecated functionality): + * + * "Wide lines and line stipple - LineWidth is not deprecated, but + * values greater than 1.0 will generate an INVALID_VALUE error;" + * + * This is one of the very few cases where functionality was deprecated but + * *NOT* removed in a later spec. Therefore, we only disallow this in a + * forward compatible context. + */ + if (ctx->API == API_OPENGL_CORE + && ((ctx->Const.ContextFlags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT) + != 0)) { + _mesa_error( ctx, GL_INVALID_VALUE, "glLineWidth" ); + return; + } + if (ctx->Line.Width == width) return; |