[Mesa-dev] [PATCH] glShaderSource must not change compile status.

[Jamey Sharp]

OpenGL 4.5 Core Profile section 7.1, in the documentation for
CompileShader, says: "Changing the source code of a shader object with
ShaderSource does not change its compile status or the compiled shader
code." (I haven't checked older versions of the spec.)

According to Karol Herbst, the game "Divinity: Original Sin - Enhanced
Edition" depends on this odd quirk of the spec. See:
https://lists.freedesktop.org/archives/mesa-dev/2016-March/109789.html

This patch, together with MESA_GL_VERSION_OVERRIDE=4.2, allows
"Divinity" to start up successfully on i965, though rendering bugs
remain.

Signed-off-by: Jamey Sharp <jamey at minilop.net>
Cc: Karol Herbst <nouveau at karolherbst.de>
---
 src/mesa/main/shaderapi.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index b28b5ce..fc2e885 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -949,7 +949,6 @@ shader_source(struct gl_shader *sh, const GLchar *source)
    /* free old shader source string and install new one */
    free((void *)sh->Source);
    sh->Source = source;
-   sh->CompileStatus = GL_FALSE;
 #ifdef DEBUG
    sh->SourceChecksum = _mesa_str_checksum(sh->Source);
 #endif
-- 
2.6.2