void say_buffer_bind(say_buffer *buf) {
say_context_ensure();
if (say_has_vao())
say_vao_make_current(say_buffer_get_vao(buf));
else
say_buffer_make_current(buf);
}
void say_buffer_resize(say_buffer *buf, size_t size) {
mo_array_resize(&buf->buffer, size);
say_context_ensure();
say_vbo_make_current(buf->vbo);
glBufferData(GL_ARRAY_BUFFER,
size * buf->buffer.el_size,
say_buffer_get_vertex(buf, 0),
buf->type);
}
void say_image_target_free(say_image_target *target) {
say_context_ensure();
say_image_target_will_delete(target->fbo, target->rbo);
glDeleteRenderbuffersEXT(1, &(target->rbo));
glDeleteFramebuffersEXT(1, &(target->fbo));
say_target_free(target->target);
free(target);
}
void say_buffer_resize_instance(say_buffer *buf, size_t size) {
mo_array_resize(buf->instance_buffer, size);
say_context_ensure();
say_vbo_make_current(buf->instance_vbo);
glBufferData(GL_ARRAY_BUFFER,
size * buf->instance_buffer->el_size,
say_buffer_get_instance(buf, 0),
buf->type);
}
void say_buffer_update_part(say_buffer *buf, size_t id, size_t size) {
if (size == 0) return;
say_context_ensure();
size_t byte_size = buf->buffer.el_size;
say_vbo_make_current(buf->vbo);
glBufferSubData(GL_ARRAY_BUFFER,
byte_size * id,
byte_size * size,
say_buffer_get_vertex(buf, id));
}
say_image_target *say_image_target_create() {
say_context_ensure();
say_image_target *target = malloc(sizeof(say_image_target));
target->target = say_target_create();
target->img = NULL;
glGenFramebuffersEXT(1, &(target->fbo));
glGenRenderbuffersEXT(1, &(target->rbo));
return target;
}
/*
* @overload draw_arrays_instanced(primitive, first, count, instance_count)
* @param [Symbol] primitive (see #draw_arrays)
* @param [Integer] first (see #draw_arrays)
* @param [Integer] count (see #draw_arrays)
* @param [Integer] instance_count Amount of instances to draw
*/
static
VALUE ray_gl_draw_arrays_instanced(VALUE self, VALUE primitive, VALUE first,
VALUE count, VALUE instance_count) {
say_context_ensure();
if (glDrawArraysInstanced) {
glDrawArraysInstanced(NUM2INT(rb_hash_aref(ray_gl_primitives, primitive)),
NUM2ULONG(first), NUM2ULONG(count),
NUM2ULONG(instance_count));
}
else
rb_raise(rb_eRuntimeError, "GL_ARB_draw_instanced is not supported");
return Qnil;
}
/*
* @overload callback=(proc)
* Sets the proc called by OpenGL for debugging purpose
* @param [Proc, nil] proc A proc, or nil to disable debugging
*
* The given proc will be called upon some events (errors or warnings about
* performance and undifined behaviors) with the following arguments:
*
* 1. A source (:api, :window_system, :shader_compiler, :third_party,
* :application, :other).
* 2. A type (:error, :depreacted_behavior, :undefined_behavior, :portability,
* :performance, :other).
* 3. An integer identifier.
* 4. A severity (:high, :medium, :low).
* 5. A human-readable message.
*
* Notice the debugging proc is only called if the context has been created
* in debug mode.
*
* @example
* Ray::GL.debug = true # required
*
* Ray::GL.callback = proc do |source, type, _, severity, msg|
* puts "[#{source}][#{type}][#{severity}] #{msg}"
* end
*
* @see debug?
*/
static
VALUE ray_gl_set_callback(VALUE self, VALUE proc) {
say_context_ensure();
if (!glDebugMessageCallbackARB)
rb_raise(rb_eRuntimeError, "setting the debug proc isn't supported");
rb_iv_set(rb_path2class("Ray::GL"), "@callback", proc);
if (RTEST(proc))
glDebugMessageCallbackARB(ray_gl_debug_proc, NULL);
else
glDebugMessageCallbackARB(NULL, NULL);
return proc;
}
/*
* @overload draw_elements_instanced(primitive, count, index, instance_count)
* @param primitive (see #draw_arrays)
* @param count (see #draw_arrays)
* @param index (see #draw_elements)
* @param instance_count (see #draw_arrays_instanced)
*/
static
VALUE ray_gl_draw_elements_instanced(VALUE self, VALUE primitive, VALUE count,
VALUE index, VALUE instance_count) {
say_context_ensure();
if (glDrawElementsInstanced) {
glDrawElementsInstanced(NUM2INT(rb_hash_aref(ray_gl_primitives, primitive)),
NUM2ULONG(count),
GL_UNSIGNED_INT, (void*)NUM2ULONG(index),
NUM2ULONG(instance_count));
}
else
rb_raise(rb_eRuntimeError, "GL_ARB_draw_instanced is not supported");
return Qnil;
}
void say_buffer_unbind() {
say_context_ensure();
if (say_has_vao())
say_vao_make_current(0);
else { /* disable vertex attribs */
for (size_t i = 1; i < GL_MAX_VERTEX_ATTRIBS; i++) {
GLint enabled;
glGetVertexAttribiv(i, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &enabled);
if (enabled)
glDisableVertexAttribArray(i);
else
break;
}
}
}
say_buffer *say_buffer_create(size_t vtype, GLenum type, size_t size) {
say_context_ensure();
say_buffer *buf = (say_buffer*)malloc(sizeof(say_buffer));
if (say_has_vao()) {
buf->vaos = mo_hash_create(sizeof(say_context*), sizeof(say_vao_pair));
buf->vaos->release = (say_destructor)say_buffer_delete_vao_pair;
buf->vaos->hash_of = mo_hash_of_pointer;
buf->vaos->key_cmp = mo_hash_pointer_cmp;
}
else
buf->vaos = NULL;
buf->vtype = vtype;
glGenBuffers(1, &buf->vbo);
say_vbo_make_current(buf->vbo);
buf->type = type;
say_vertex_type *vtype_ref = say_get_vertex_type(vtype);
size_t byte_size = say_vertex_type_get_size(vtype_ref);
mo_array_init(&buf->buffer, byte_size);
mo_array_resize(&buf->buffer, size);
glBufferData(GL_ARRAY_BUFFER, size * byte_size, NULL, type);
buf->instance_vbo = 0;
buf->instance_buffer = NULL;
if (say_vertex_type_has_instance_data(vtype_ref)) {
glGenBuffers(1, &buf->instance_vbo);
say_vbo_make_current(buf->instance_vbo);
byte_size = say_vertex_type_get_instance_size(vtype_ref);
buf->instance_buffer = mo_array_create(byte_size);
}
return buf;
}
void say_buffer_free(say_buffer *buf) {
say_context_ensure();
if (buf->vaos)
mo_hash_free(buf->vaos);
else
say_buffer_will_delete(buf);
say_vbo_will_delete(buf->vbo);
glDeleteBuffers(1, &buf->vbo);
if (buf->instance_vbo) {
say_vbo_will_delete(buf->instance_vbo);
glDeleteBuffers(1, &buf->instance_vbo);
mo_array_free(buf->instance_buffer);
}
mo_array_release(&buf->buffer);
free(buf);
}
void say_image_target_set_image(say_image_target *target, say_image *image) {
say_context_ensure();
target->img = image;
if (target->img) {
say_target_set_custom_data(target->target, target);
//say_target_need_own_contxt(target->target, 0);
say_target_set_context_proc(target->target, say_image_target_make_context);
say_target_set_bind_hook(target->target, (say_bind_hook)say_image_target_bind);
say_vector2 size = say_image_get_size(image);
say_target_set_size(target->target, size);
say_view_set_size(target->target->view, size);
say_view_set_center(target->target->view, say_make_vector2(size.x / 2.0,
size.y / 2.0));
say_view_flip_y(target->target->view, 0);
say_fbo_make_current(target->fbo);
say_image_bind(image);
glGenerateMipmapEXT(GL_TEXTURE_2D);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, image->texture, 0);
say_rbo_make_current(target->rbo);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT,
say_image_get_width(image),
say_image_get_height(image));
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, target->rbo);
}
}
void say_image_target_bind(say_image_target *target) {
say_context_ensure();
say_fbo_make_current(target->fbo);
glClear(GL_DEPTH_BUFFER_BIT);
}
/* @return [True, False] True if a callback proc can be set */
static
VALUE ray_gl_has_callback(VALUE self) {
say_context_ensure();
return glDebugMessageCallbackARB ? Qtrue : Qfalse;
}
void say_buffer_unbind_vbo() {
say_context_ensure();
say_vbo_make_current(0);
}
void say_buffer_bind_instance_vbo(say_buffer *buf) {
say_context_ensure();
say_vbo_make_current(buf->instance_vbo);
}
/*
* Ensures an OpenGL context is active for the current thread
*/
static
VALUE ray_gl_ensure_context(VALUE self) {
say_context_ensure();
return Qnil;
}
bool say_image_target_is_available() {
say_context_ensure();
return __GLEW_EXT_framebuffer_object != 0;
}