static int ShaderProgram_allocate(lua_State* L)
{
struct _kl_effect* effect = NULL;
GLuint gl_program;
/* Hacky */
struct _kl_shader* shaders[3] = {NULL, NULL, NULL};
int num_shaders = 3;
/* TODO: Arg type checking */
shaders[0] = lua_touserdata(L, 1);
shaders[1] = lua_touserdata(L, 2);
shaders[2] = lua_touserdata(L, 3);
if(program_link(shaders, num_shaders, &gl_program) == KL_SUCCESS)
{
effect = (struct _kl_effect*)lua_newuserdata(L, sizeof(struct _kl_effect));
effect->program = gl_program;
luaL_getmetatable(L, SHADER_PROGRAM_LUA_LIB);
lua_setmetatable(L, -2);
}
else
{
lua_pushstring(L, "error linking shader program");
lua_error(L);
}
return 1;
}
static int ShaderProgram_update(lua_State* L)
{
struct _kl_effect* effect = (struct _kl_effect*)lua_touserdata(L, 1);
GLuint gl_program;
/* Hacky */
struct _kl_shader* shaders[3] = {NULL, NULL, NULL};
int num_shaders = 3;
/* TODO: Arg type checking */
shaders[0] = lua_touserdata(L, 2);
shaders[1] = lua_touserdata(L, 3);
shaders[2] = lua_touserdata(L, 4);
if(program_link(shaders, num_shaders, &gl_program) == KL_SUCCESS)
{
GLuint old_program = effect->program;
effect->program = gl_program;
glDeleteProgram(old_program);
}
else
{
lua_pushstring(L, "error linking shader program");
lua_error(L);
}
return 1;
}
bool lprogram_set_shaders(lua_State *L, const char *vs_text, const char *fs_text)
{
struct program *program = lua_touserdata(L, -1);
if ((vs_text && fs_text) && (strcmp(program->vertex_text, vs_text) || strcmp(program->fragment_text, fs_text))) {
program->linked = false;
program->vertex_text = strdup(vs_text);
program->fragment_text = strdup(fs_text);
if (!program_compile(program)) {
return false;
}
glBindAttribLocation(program->program, ATTRIBUTE_VERTEX, "vertex");
glBindAttribLocation(program->program, ATTRIBUTE_NORMAL, "normal");
glBindAttribLocation(program->program, ATTRIBUTE_UV, "uv");
glBindAttribLocation(program->program, ATTRIBUTE_TANGENT, "tangent");
glBindAttribLocation(program->program, ATTRIBUTE_WEIGHT0, "weights[0]");
glBindAttribLocation(program->program, ATTRIBUTE_WEIGHT1, "weights[1]");
glBindAttribLocation(program->program, ATTRIBUTE_WEIGHT2, "weights[2]");
glBindAttribLocation(program->program, ATTRIBUTE_WEIGHT3, "weights[3]");
glBindAttribLocation(program->program, ATTRIBUTE_WEIGHT4, "weights[4]");
glBindAttribLocation(program->program, ATTRIBUTE_WEIGHT5, "weights[5]");
program_link(program);
}
return program->linked;
}