vo_opengl: make the screen blue on shader errors

This helps visually signify that somthing went wrong, and prevents
confusing shader compilation errors with other types of bugs.

1 files changed, 18 insertions, 0 deletions

diff --git a/video/out/opengl/utils.c b/video/out/opengl/utils.c
index d29d7b0bdb..5ef99ac599 100644
--- a/video/out/opengl/utils.c
+++ b/video/out/opengl/utils.c
@@ -485,6 +485,8 @@ struct gl_shader_cache {
     struct sc_uniform uniforms[SC_UNIFORM_ENTRIES];
     int num_uniforms;
 
+    bool error_state; // true if an error occurred
+
     // temporary buffers (avoids frequent reallocations)
     bstr tmp[5];
 };
@@ -532,6 +534,16 @@ void gl_sc_destroy(struct gl_shader_cache *sc)
     talloc_free(sc);
 }
 
+bool gl_sc_error_state(struct gl_shader_cache *sc)
+{
+    return sc->error_state;
+}
+
+void gl_sc_reset_error(struct gl_shader_cache *sc)
+{
+    sc->error_state = false;
+}
+
 void gl_sc_enable_extension(struct gl_shader_cache *sc, char *name)
 {
     bstr_xappend_asprintf(sc, &sc->prelude_text, "#extension %s : enable\n", name);
@@ -810,6 +822,9 @@ static void compile_attach_shader(struct gl_shader_cache *sc, GLuint program,
 
     gl->AttachShader(program, shader);
     gl->DeleteShader(shader);
+
+    if (!status)
+        sc->error_state = true;
 }
 
 static void link_shader(struct gl_shader_cache *sc, GLuint program)
@@ -828,6 +843,9 @@ static void link_shader(struct gl_shader_cache *sc, GLuint program)
         MP_MSG(sc, pri, "shader link log (status=%d): %s\n", status, logstr);
         talloc_free(logstr);
     }
+
+    if (!status)
+        sc->error_state = true;
 }
 
 static GLuint create_program(struct gl_shader_cache *sc, const char *vertex,