debug chapterHEADmaster

1 files changed, 125 insertions, 2 deletions

diff --git a/libs/common.h b/libs/common.h
index 72b44e7..08e753a 100644
--- a/libs/common.h
+++ b/libs/common.h
@@ -181,6 +181,7 @@ typedef struct {
 	GLFWwindow *window;
 	S32 width;
 	S32 height;
+	S32 debug;
 } state_t;
 
 Input input_init()
@@ -190,7 +191,7 @@ Input input_init()
 	return(input);
 }
 
-state_t init_state(S32 width, S32 height)
+state_t init_state(S32 width, S32 height, S32 debug)
 {
 	state_t state = {
 		.arena = arena_alloc(Megabytes(64)),
@@ -204,7 +205,8 @@ state_t init_state(S32 width, S32 height)
 			.pitch = 0.0f
 		},
 		.width = width,
-		.height = height
+		.height = height,
+		.debug = debug
 	};
 	return state;
 }
@@ -664,6 +666,8 @@ void init_glfw(state_t *state) {
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	if (state->debug)
+		glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, 1);
 
 	glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
 	glfwWindowHint(GLFW_POSITION_X, xpos + monitor_width / 2.0f - state->width / 2.0f);
@@ -680,10 +684,91 @@ void init_glfw(state_t *state) {
 	glfwSwapInterval(0);
 }
 
+void gl_debug_output(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const void *userParam)
+{
+	/* ignore these non-significant error codes */
+	if(id == 131169 || id == 131185 || id == 131218 || id == 131204)
+		return;
+	info("debug message (%d): %s", id, message);
+	switch (source) {
+	case GL_DEBUG_SOURCE_API:
+		info("source: api");
+		break;
+	case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
+		info("source: window system");
+		break;
+	case GL_DEBUG_SOURCE_SHADER_COMPILER:
+		info("source: shader compiler");
+		break;
+	case GL_DEBUG_SOURCE_THIRD_PARTY:
+		info("source: third party");
+		break;
+	case GL_DEBUG_SOURCE_APPLICATION:
+		info("source: application");
+		break;
+	case GL_DEBUG_SOURCE_OTHER:
+		info("source: other");
+		break;
+	}
+	switch (type) {
+	case GL_DEBUG_TYPE_ERROR:
+		info("type: error");
+		break;
+	case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
+		info("type: deprecated behaviour");
+		break;
+	case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
+		info("type: undefined behaviour");
+		break; 
+	case GL_DEBUG_TYPE_PORTABILITY:
+		info("type: portability");
+		break;
+	case GL_DEBUG_TYPE_PERFORMANCE:
+		info("type: performance");
+		break;
+	case GL_DEBUG_TYPE_MARKER:
+		info("type: marker");
+		break;
+	case GL_DEBUG_TYPE_PUSH_GROUP:
+		info("type: push group");
+		break;
+	case GL_DEBUG_TYPE_POP_GROUP:
+		info("type: pop group");
+		break;
+	case GL_DEBUG_TYPE_OTHER:
+		info("type: other");
+		break;
+	}
+	switch (severity) {
+	case GL_DEBUG_SEVERITY_HIGH:
+		info("severity: high");
+		break;
+	case GL_DEBUG_SEVERITY_MEDIUM:
+		info("severity: medium");
+		break;
+	case GL_DEBUG_SEVERITY_LOW:
+		info("severity: low");
+		break;
+	case GL_DEBUG_SEVERITY_NOTIFICATION:
+		info("severity: notification");
+		break;
+	}
+	putc('\n', stdout);
+}
+
 void init_gl(void)
 {
 	if (glewInit() != GLEW_OK)
 		die("failed to initialize glew");
+	int flags;
+	glGetIntegerv(GL_CONTEXT_FLAGS, &flags);
+	if (flags & GL_CONTEXT_FLAG_DEBUG_BIT) {
+		info("debug context initialized successfully");
+		glEnable(GL_DEBUG_OUTPUT);
+		glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
+		glDebugMessageCallback(gl_debug_output, 0);
+		glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, 0, GL_TRUE);
+	}
 	glEnable(GL_DEPTH_TEST);
 }
 
@@ -1056,4 +1141,42 @@ F32 lerp(F32 a, F32 b, F32 f)
     return a + f * (b - a);
 }
 
+U32 check_gl_errors_(const char *file, int line)
+{
+	U32 code;
+	while ((code = glGetError()) != GL_NO_ERROR) {
+		char *error;
+		switch (code) {
+		case GL_INVALID_ENUM:
+			error = "invalid enum";
+			break;
+		case GL_INVALID_VALUE:
+			error = "invalid value";
+			break;
+		case GL_INVALID_OPERATION:
+			error = "invalid operation";
+			break;
+		case GL_STACK_OVERFLOW:
+			error = "stack overflow";
+			break;
+		case GL_STACK_UNDERFLOW:
+			error = "stack underflow";
+			break;
+		case GL_OUT_OF_MEMORY:
+			error = "out of memory";
+			break;
+		case GL_INVALID_FRAMEBUFFER_OPERATION:
+			error = "invalid framebuffer operation";
+			break;
+		default:
+			error = "undefined error";
+			break;
+		}
+		info("%s:%d: %s", file, line, error);
+	}
+	return code;
+}
+
+#define check_gl_errors() check_gl_errors_(__FILE__, __LINE__)
+
 #endif /* COMMON_H */