Check GLSL program link status, for better error reporting.

[movit] / resource_pool.cpp

diff --git a/resource_pool.cpp b/resource_pool.cpp
index 4f2cc2b9ade1e6cc98ec50b50eb30fccbd550a55..04b1aa9754b4a51bb5fe54a875047db414700777 100644 (file)
--- a/resource_pool.cpp
+++ b/resource_pool.cpp
@@ -105,6 +105,15 @@ GLuint ResourcePool::compile_glsl_program(const string& vertex_shader, const str
                glLinkProgram(glsl_program_num);
                check_error();
 
+               GLint success;
+               glGetProgramiv(glsl_program_num, GL_LINK_STATUS, &success);
+               if (success == GL_FALSE) {
+                       GLchar error_log[1024] = {0};
+                       glGetProgramInfoLog(glsl_program_num, 1024, NULL, error_log);
+                       fprintf(stderr, "Error linking program: %s\n", error_log);
+                       exit(1);
+               }
+
                if (movit_debug_level == MOVIT_DEBUG_ON) {
                        // Output shader to a temporary file, for easier debugging.
                        static int compiled_shader_num = 0;