From a2c162f12337142c054c2e1f01ad508ee56963d2 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Mon, 22 Aug 2022 11:00:42 -0500
Subject: refactor: move data functions into separate file

---
 src/gl/gl.c | 143 +-----------------------------------------------------------
 1 file changed, 1 insertion(+), 142 deletions(-)

(limited to 'src/gl/gl.c')

diff --git a/src/gl/gl.c b/src/gl/gl.c
index 876df9d..8a1cb17 100644
--- a/src/gl/gl.c
+++ b/src/gl/gl.c
@@ -18,16 +18,6 @@ int glad_init(lua_State *L);
 int gl_terminate(lua_State *L);
 int gl_get_error(lua_State *L);
 
-/* buffers */
-int gl_create_buffer(lua_State *L);
-int gl_bind_buffer(lua_State *L);
-int gl_buffer_data(lua_State *L);
-
-int gl_vertex_array_create(lua_State *L);
-int gl_vertex_array_bind(lua_State *L);
-int gl_vertex_attrib_pointer(lua_State *L);
-int gl_vertex_array_enable_attrib(lua_State *L);
-
 void setup_gl(lua_State *L, int honey_index)
 {
 	int data_types = hs_create_table(L,
@@ -44,17 +34,6 @@ void setup_gl(lua_State *L, int honey_index)
 		hs_str_int("outOfMemory", GL_OUT_OF_MEMORY),
 	);
 
-	int buffer_binding_targets = hs_create_table(L,
-		hs_str_int("arrayBuffer", GL_ARRAY_BUFFER),
-		hs_str_int("elementArrayBuffer", GL_ELEMENT_ARRAY_BUFFER),
-	);
-
-	int buffer_usage_patterns = hs_create_table(L,
-		hs_str_int("streamDraw", GL_STREAM_DRAW),
-		hs_str_int("staticDraw", GL_STATIC_DRAW),
-		hs_str_int("dynamicDraw", GL_DYNAMIC_DRAW),
-	);
-
 	int gl_index = hs_create_table(L,
 		hs_str_cfunc("init", gl_init),
 		hs_str_cfunc("initGlad", glad_init),
@@ -63,23 +42,11 @@ void setup_gl(lua_State *L, int honey_index)
 
 		hs_str_tbl("dataType", data_types),
 		hs_str_tbl("errorType", error_types),
-
-		/* buffer */
-		hs_str_cfunc("createBuffer", gl_create_buffer),
-		hs_str_cfunc("bindBuffer", gl_bind_buffer),
-		hs_str_cfunc("bufferData", gl_buffer_data),
-
-		hs_str_cfunc("createVertexArray", gl_vertex_array_create),
-		hs_str_cfunc("bindVertexArray", gl_vertex_array_bind),
-		hs_str_cfunc("vertexAttribPointer", gl_vertex_attrib_pointer),
-		hs_str_cfunc("vertexArrayEnableAttrib", gl_vertex_array_enable_attrib),
-
-		hs_str_tbl("bufferTarget", buffer_binding_targets),
-		hs_str_tbl("bufferUsage", buffer_usage_patterns),
 	);
 
 	setup_shader(L, gl_index);
 	setup_drawing(L, gl_index);
+	setup_data(L, gl_index);
 	lua_setfield(L, honey_index, "gl");
 }
 
@@ -113,111 +80,3 @@ int gl_get_error(lua_State *L)
 	lua_pushinteger(L, glGetError());
 	return 1;
 }
-
-
-int gl_create_buffer(lua_State *L)
-{
-	int buf;
-	glGenBuffers(1, &buf);
-	lua_pushinteger(L, buf);
-	return 1;
-}
-
-
-int gl_bind_buffer(lua_State *L)
-{
-	lua_Integer target, buf;
-	hs_parse_args(L, hs_int(target), hs_int(buf));
-	glBindBuffer(target, buf);
-	return 0;
-}
-
-
-int gl_buffer_data(lua_State *L)
-{
-	lua_Integer target, type, usage;
-	int table;
-	hs_parse_args(L, hs_int(target), hs_int(type), hs_tbl(table), hs_int(usage));
-
-	if (type != GL_INT && type != GL_FLOAT) {
-		hs_throw_error(L, "invalid type");
-	}
-
-	/* build raw buffer */
-	size_t len = lua_objlen(L, table);
-	void *buf;
-	if (type == GL_FLOAT) {
-		float *fbuf = malloc(len * sizeof(float));
-		if (fbuf == NULL)
-			hs_throw_error(L, "failed to allocate intermediary fbuffer");
-		for (int i=0; i<len; i++) {
-			lua_rawgeti(L, table, i+1);
-			if (!lua_isnumber(L, -1)) {
-				hs_throw_error(L, "all table items must be numbers (failed at index %d)", i);
-			}
-			fbuf[i] = lua_tonumber(L, -1);
-			lua_pop(L, 1);
-		}
-		len = len * sizeof(float);
-		buf = fbuf;
-	}
-	else {
-		int *ibuf = malloc(len * sizeof(int));
-		if (ibuf == NULL)
-			hs_throw_error(L, "failed to allocate intermediary ibuffer");
-		for (int i=0; i<len; i++) {
-			lua_rawgeti(L, table, i+1);
-			if (!lua_isnumber(L, -1)) {
-				hs_throw_error(L, "all table items must be integers (failed at index %d)", i);
-			}
-			ibuf[i] = lua_tointeger(L, -1);
-			lua_pop(L, 1);
-		}
-		len = len * sizeof(int);
-		buf = ibuf;
-	}
-
-	/* call */
-	glBufferData(target, len, buf, usage);
-	free(buf);
-	return 0;
-}
-
-
-int gl_vertex_array_create(lua_State *L)
-{
-	int array;
-	glGenVertexArrays(1, &array);
-	lua_pushinteger(L, array);
-	return 1;
-}
-
-
-int gl_vertex_array_bind(lua_State *L)
-{
-	lua_Integer array;
-	hs_parse_args(L, hs_int(array));
-	glBindVertexArray(array);
-	return 0;
-}
-
-
-int gl_vertex_attrib_pointer(lua_State *L)
-{
-	lua_Integer index, size, stride, offset;
-	bool normalized;
-	hs_parse_args(L, hs_int(index), hs_int(size), hs_bool(normalized), hs_int(stride), hs_int(offset));
-	glVertexAttribPointer(index, size, GL_FLOAT, 
-	                      normalized, stride*sizeof(float), 
-	                      (void*) (offset*sizeof(float)));
-	return 0;
-}
-
-
-int gl_vertex_array_enable_attrib(lua_State *L)
-{
-	lua_Integer index;
-	hs_parse_args(L, hs_int(index));
-	glEnableVertexAttribArray(index);
-	return 0;
-}
-- 
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