107 lines
3.5 KiB
Rust
107 lines
3.5 KiB
Rust
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use crate::base::ControlFlow;
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use crate::prelude::*;
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use std::ffi::CStr;
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use std::os::raw::c_uint;
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use sdl2::Sdl;
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use sdl2::video::{GLContext, Window};
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pub struct SimpleSdl2OpenglComponent {
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window: Window,
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window_fbo: c_uint,
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gl_context: GLContext,
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pixel_format: sdl2::pixels::PixelFormatEnum,
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hw_context_reset_fn: Option<HwContextResetFn>,
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hw_context_destroy_fn: Option<HwContextResetFn>,
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}
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impl SimpleSdl2OpenglComponent {
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pub fn new(sdl_context: &mut Sdl, retro: &LibretroWrapper) -> Result<Self, Box<dyn std::error::Error>> {
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let sys_info = retro.get_system_info();
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let title = format!(
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"{} - ferretro",
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unsafe { CStr::from_ptr(sys_info.library_name) }.to_string_lossy()
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);
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let geometry = retro.get_system_av_info().geometry;
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let pixel_format = sdl2::pixels::PixelFormatEnum::ARGB1555;
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let video = sdl_context.video()?;
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let window = video
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.window(title.as_str(), geometry.base_width, geometry.base_height)
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.opengl()
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.build()?;
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// http://forums.libsdl.org/viewtopic.php?p=43353
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// likely to remain `0` on any platform that isn't iOS, but we'll do it anyhow
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let gl_context = window.gl_create_context()?;
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let mut window_fbo: c_uint = 0;
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unsafe {
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const GL_FRAMEBUFFER_BINDING: c_uint = 0x8CA6;
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#[allow(non_snake_case)]
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let glGetIntegerv: unsafe extern "C" fn(c_uint, *mut c_uint) = std::mem::transmute(
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video.gl_get_proc_address("glGetIntegerv")
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);
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &mut window_fbo);
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}
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Ok(SimpleSdl2OpenglComponent {
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window,
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window_fbo,
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gl_context,
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pixel_format,
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hw_context_reset_fn: None,
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hw_context_destroy_fn: None,
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})
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}
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}
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impl RetroCallbacks for SimpleSdl2OpenglComponent {
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fn set_pixel_format(&mut self, pix_fmt: PixelFormat) -> Option<bool> {
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self.pixel_format = match pix_fmt {
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PixelFormat::ARGB1555 => sdl2::pixels::PixelFormatEnum::RGB555,
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PixelFormat::ARGB8888 => sdl2::pixels::PixelFormatEnum::ARGB8888,
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PixelFormat::RGB565 => sdl2::pixels::PixelFormatEnum::RGB565,
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};
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Some(true)
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}
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fn set_hw_render(&mut self, hw_render_callback: &HwRenderCallback) -> Option<bool> {
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self.hw_context_reset_fn.replace(hw_render_callback.context_reset);
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self.hw_context_destroy_fn.replace(hw_render_callback.context_destroy);
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self.hw_context_reset_fn.map(|f| unsafe { f() });
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Some(true)
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}
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/*
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fn set_system_av_info(&mut self, av_info: &SystemAvInfo) -> Option<bool> {
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self.set_geometry(&av_info.geometry);
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Some(true)
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}
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fn set_geometry(&mut self, geom: &GameGeometry) -> Option<bool> {
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let _ = self.canvas.window_mut().set_size(geom.base_width, geom.base_height);
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let _ = self.canvas.set_logical_size(geom.base_width, geom.base_height);
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Some(true)
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}
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*/
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fn hw_get_current_framebuffer(&mut self) -> Option<usize> {
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Some(self.window_fbo as usize)
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}
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fn hw_get_proc_address(&mut self, sym: &str) -> Option<*const ()> {
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Some(self.window.subsystem().gl_get_proc_address(sym))
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}
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}
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impl RetroComponent for SimpleSdl2OpenglComponent {
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fn post_run(&mut self, _retro: &mut LibretroWrapper) -> ControlFlow {
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self.window.gl_swap_window();
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ControlFlow::Continue
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}
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}
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