[PATCH 3/7] glamor: swallow gl errors before compiling programs

[Maarten Lankhorst]

In case the glamor implementation is buggy a error might be set
before compiling, which causes glamor_build_program to enter
the failure path even though shader compilation succeeded.
Eat all errors before running glamor_build_program.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at ubuntu.com>
---
 glamor/glamor_program.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/glamor/glamor_program.c b/glamor/glamor_program.c
index 1d0328f..0688205 100644
--- a/glamor/glamor_program.c
+++ b/glamor/glamor_program.c
@@ -253,6 +253,10 @@ glamor_build_program(ScreenPtr          screen,
     char                        *fs_prog_string;
 
     GLint                       fs_prog, vs_prog;
+    GLint error;
+
+    while ((error = glGetError()) != GL_NO_ERROR)
+        glamor_fallback("Error: %x\n", error);
 
     if (!fill)
         fill = &facet_null_fill;
-- 
2.2.1