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#[macro_use]
extern crate log;
extern crate sdl2;
extern crate gfx_core as core;
extern crate gfx_device_gl;
use core::handle;
use core::format::{ChannelType, DepthFormat, Format, RenderFormat};
pub use gfx_device_gl::{Device, Factory, Resources};
use sdl2::video::{DisplayMode, GLContext, Window, WindowBuilder, WindowBuildError};
use sdl2::pixels::PixelFormatEnum;
#[derive(Debug)]
pub enum InitError {
PixelFormatUnsupportedError,
WindowBuildError(WindowBuildError),
SdlError(String),
}
impl From<String> for InitError {
fn from(e: String) -> Self {
InitError::SdlError(e)
}
}
impl From<WindowBuildError> for InitError {
fn from(e: WindowBuildError) -> Self {
InitError::WindowBuildError(e)
}
}
fn sdl2_pixel_format_from_gfx(format: Format) -> Option<PixelFormatEnum> {
use core::format::SurfaceType::*;
use sdl2::pixels::PixelFormatEnum as SdlFmt;
let Format(surface, _) = format;
match surface {
R4_G4_B4_A4 => Some(SdlFmt::RGBA4444),
R5_G5_B5_A1 => Some(SdlFmt::RGBA5551),
R5_G6_B5 => Some(SdlFmt::RGB565),
R8_G8_B8_A8 => Some(SdlFmt::RGBA8888),
B8_G8_R8_A8 => Some(SdlFmt::BGRA8888),
R10_G10_B10_A2 => {
warn!("The transfer operations with this format may produce different results on SDL \
compared to Glutin/GLFW, beware!");
Some(SdlFmt::ARGB2101010)
}
R4_G4 | R8 | R8_G8 | R11_G11_B10 | R16 | R16_G16 | R16_G16_B16 |
R16_G16_B16_A16 | R32 | R32_G32 | R32_G32_B32 | R32_G32_B32_A32 | D16 | D24 |
D24_S8 | D32 => None,
}
}
pub type InitRawOk = (Window, GLContext, Device, Factory,
handle::RawRenderTargetView<Resources>, handle::RawDepthStencilView<Resources>);
pub type InitOk<Cf, Df> =
(Window, GLContext, Device, Factory,
handle::RenderTargetView<Resources, Cf>,
handle::DepthStencilView<Resources, Df>);
pub fn init<Cf, Df>(builder: WindowBuilder) -> Result<InitOk<Cf, Df>, InitError>
where
Cf: RenderFormat,
Df: DepthFormat,
{
use core::memory::Typed;
init_raw(builder, Cf::get_format(), Df::get_format())
.map(|(w, gl, d, f, color_view, ds_view)|
(w, gl, d, f, Typed::new(color_view), Typed::new(ds_view)))
}
pub fn init_raw(mut builder: WindowBuilder, cf: Format, df: Format)
-> Result<InitRawOk, InitError> {
use core::texture::{AaMode, Size};
let mut window = builder.opengl().build()?;
let display_mode = DisplayMode {
format: sdl2_pixel_format_from_gfx(cf)
.ok_or(InitError::PixelFormatUnsupportedError)?,
..window.display_mode()?
};
window.set_display_mode((Some(display_mode)))?;
{
let depth_total_bits = df.0.get_total_bits();
let stencil_bits = df.0.get_alpha_stencil_bits();
let attr = window.subsystem().gl_attr();
attr.set_framebuffer_srgb_compatible(cf.1 == ChannelType::Srgb);
attr.set_alpha_size(cf.0.get_alpha_stencil_bits());
attr.set_depth_size(depth_total_bits - stencil_bits);
attr.set_stencil_size(stencil_bits);
attr.set_context_flags().set();
}
let context = window.gl_create_context()?;
let (device, factory) = gfx_device_gl::create(|s| {
window.subsystem().gl_get_proc_address(s) as *const std::os::raw::c_void
});
let (width, height) = window.drawable_size();
let dim = (width as Size, height as Size, 1, AaMode::Single);
let (color_view, ds_view) = gfx_device_gl::create_main_targets_raw(dim, cf.0, df.0);
Ok((window, context, device, factory, color_view, ds_view))
}