void Canvas_Impl::setup(GraphicContext &new_gc)
{
gc = new_gc;
if (!current_window.is_null())
{
sc.connect(current_window.sig_window_flip(), bind_member(this, &Canvas_Impl::on_window_flip));
}
gc_clip_z_range = gc.get_provider()->get_clip_z_range();
canvas_transform = Mat4f::identity();
if (gc.get_write_frame_buffer().is_null()) // No framebuffer attached to canvas
{
canvas_y_axis = y_axis_top_down;
sc.connect(gc.get_provider()->sig_window_resized(), bind_member(this, &Canvas_Impl::on_window_resized));
}
else
{
if (gc.get_texture_image_y_axis() == y_axis_bottom_up)
{
canvas_y_axis = y_axis_bottom_up;
}
else
{
canvas_y_axis = y_axis_top_down;
}
}
update_viewport_size();
if (batcher.is_null())
{
batcher = CanvasBatcher(gc);
}
}
AlError graphics_system_init()
{
BEGIN()
TRY(algl_system_init());
glEnable(GL_SCISSOR_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
TRY(init_shaders());
glGenBuffers(1, &plainVertices);
glBindBuffer(GL_ARRAY_BUFFER, plainVertices);
float vertices[][2] = {{0, 0}, {1, 0}, {1, 1}, {0, 1}};
glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 8, vertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
update_viewport_size();
CATCH(
graphics_system_free();
)
void Canvas_Impl::on_window_resized(const Size &size)
{
update_viewport_size();
}
