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factor out frame-to-surface code in SDL, use it to convert pixel format before upscaling in frame-to-canvas

This commit is contained in:
lifning 2021-12-10 18:57:00 -08:00
parent 82217ff117
commit 9de6008ef5
4 changed files with 55 additions and 34 deletions
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2
ferretro_components/Cargo.toml
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@ -12,7 +12,7 @@ ferretro_base = { path = "../ferretro_base" }
libloading = "0.5"
num_enum = "0.4"
ffmpeg-next = { version = "4.3.8", optional = true }
sdl2 = { version = "0.32", optional = true, features = ["gfx"] }
sdl2 = { version = "0.35.1", optional = true, features = ["gfx"] }
gl = { version = "0.14", optional = true }
crossbeam-channel = { version = "0.4", optional = true }
tempfile = "3"

47
ferretro_components/src/provided/sdl2/canvas.rs
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@ -4,17 +4,14 @@ use std::ffi::CStr;
use std::path::Path;
use sdl2::Sdl;
use sdl2::rect::Rect;
use sdl2::render::WindowCanvas;
use sdl2::video::FullscreenType;
pub(crate) fn paint_frame_on_canvas(frame: &VideoFrame, canvas: &mut WindowCanvas) -> bool {
if let Some((pixel_data, pitch)) = frame.data_pitch_as_bytes() {
if let Ok(surf) = frame_to_surface(frame) {
let (cw, ch) = canvas.output_size().unwrap();
let (width, height) = frame.dimensions();
let pixel_format = frame.pixel_format().map(sdl2_pixfmt);
let should_intscale = if cw >= width && ch >= height {
let should_intscale = if cw >= surf.width() && ch >= surf.height() {
sdl2::sys::SDL_bool::SDL_TRUE
} else {
sdl2::sys::SDL_bool::SDL_FALSE
@ -23,15 +20,14 @@ pub(crate) fn paint_frame_on_canvas(frame: &VideoFrame, canvas: &mut WindowCanva
sdl2::sys::SDL_RenderSetIntegerScale(canvas.raw(), should_intscale);
}
if let Ok(mut tex) = canvas
let format = sdl2::pixels::PixelFormat::try_from(canvas.default_pixel_format()).unwrap();
let surface = surf.convert(&format).unwrap();
if let Ok(tex) = canvas
.texture_creator()
.create_texture_static(pixel_format, width, height)
.create_texture_from_surface(surface)
{
let rect = Rect::new(0, 0, width, height);
if tex.update(rect, pixel_data, pitch).is_ok() {
canvas.clear();
canvas.copy(&tex, None, None).unwrap();
}
canvas.copy(&tex, None, None).unwrap();
}
canvas.present();
true
@ -48,16 +44,33 @@ pub(crate) fn sdl2_pixfmt(retro_fmt: PixelFormat) -> sdl2::pixels::PixelFormatEn
}
}
pub(crate) fn frame_to_surface<'a>(frame: &'a VideoFrame) -> crate::base::Result<sdl2::surface::Surface<'a>> {
let (bytes, pitch) = frame.data_pitch_as_bytes().unwrap();
let (width, height) = frame.dimensions();
let pixel_format = frame
.pixel_format()
.map(sdl2_pixfmt)
.ok_or("Unknown pixel format")?;
// dirty, but must be &mut for SDL API.
// safe as long as we don't offer a &mut Surface in the public API.
let data = unsafe {
core::slice::from_raw_parts_mut(bytes.as_ptr() as *mut u8, bytes.len())
};
sdl2::surface::Surface::from_data(data, width, height, pitch as u32, pixel_format)
.map_err(Into::into)
}
/// Creates a root window in SDL2, then displays each 2D video frame provided by the core
/// by converting it to a [sdl2::render::Texture] and copying it to the window's canvas.
///
/// This component has no public interface and manages the SDL2 window on its own.
pub struct SimpleSdl2CanvasComponent {
canvas: WindowCanvas,
win_size: (u32, u32),
}
impl SimpleSdl2CanvasComponent {
pub fn new(sdl_context: &mut Sdl, ft: FullscreenType) -> Result<Self, Box<dyn std::error::Error>> {
pub fn new(sdl_context: &mut Sdl, ft: FullscreenType) -> crate::base::Result<Self> {
// default to old libsnes 256x224 window size until load_game (prereq of get_system_av_info)
let mut window = sdl_context
.video()?
@ -72,8 +85,11 @@ impl SimpleSdl2CanvasComponent {
.into_canvas()
.build()?;
let win_size = canvas.output_size().unwrap();
Ok(SimpleSdl2CanvasComponent {
canvas,
win_size,
})
}
}
@ -95,6 +111,11 @@ impl RetroComponent for SimpleSdl2CanvasComponent {
impl RetroCallbacks for SimpleSdl2CanvasComponent {
fn video_refresh(&mut self, frame: &VideoFrame) {
let output_size = self.canvas.output_size().unwrap();
if output_size != self.win_size {
self.canvas.clear();
self.win_size = output_size;
}
paint_frame_on_canvas(frame, &mut self.canvas);
}

13
ferretro_components/src/provided/sdl2/opengl.rs
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@ -21,6 +21,7 @@ use super::canvas::paint_frame_on_canvas;
#[allow(non_snake_case)]
pub struct SimpleSdl2OpenglComponent {
canvas: WindowCanvas,
win_size: (u32, u32),
window_fbo: c_uint,
hw_context_reset_fn: Option<HwContextResetFn>,
hw_context_destroy_fn: Option<HwContextResetFn>,
@ -59,8 +60,11 @@ impl SimpleSdl2OpenglComponent {
// SDL_CreateRenderer, called by CanvasBuilder::build, creates a new GL Context.
let window_fbo = unsafe { let mut fbo = 0; glGetIntegerv(gl::FRAMEBUFFER_BINDING, &mut fbo); fbo };
let win_size = canvas.output_size().unwrap();
Ok(SimpleSdl2OpenglComponent {
canvas,
win_size,
window_fbo,
hw_context_reset_fn: None,
hw_context_destroy_fn: None,
@ -110,7 +114,14 @@ impl RetroCallbacks for SimpleSdl2OpenglComponent {
unsafe { (self.glClear)(gl::COLOR_BUFFER_BIT); }
}
VideoFrame::Duplicate { .. } => {}
_ => { paint_frame_on_canvas(frame, &mut self.canvas); },
_ => {
let output_size = self.canvas.output_size().unwrap();
if output_size != self.win_size {
self.canvas.clear();
self.win_size = output_size;
}
paint_frame_on_canvas(frame, &mut self.canvas);
},
}
}

27
ferretro_components/src/provided/sdl2/surface.rs
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@ -1,4 +1,5 @@
use crate::prelude::*;
use crate::provided::sdl2::canvas::frame_to_surface;
use sdl2::surface::Surface;
@ -9,7 +10,7 @@ pub struct Sdl2SurfaceComponent {
}
impl Sdl2SurfaceComponent {
pub fn new() -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
pub fn new() -> crate::base::Result<Self> {
let pixel_format = sdl2::pixels::PixelFormatEnum::ARGB1555;
// automatically replaced in video_refresh whenever size doesn't match
@ -39,26 +40,14 @@ impl Sdl2SurfaceComponent {
impl RetroComponent for Sdl2SurfaceComponent {}
impl RetroCallbacks for Sdl2SurfaceComponent {
fn video_refresh(&mut self, frame: &VideoFrame) {
match frame {
VideoFrame::XRGB1555 { width, height, .. }
| VideoFrame::RGB565 { width, height, .. }
| VideoFrame::XRGB8888 { width, height, .. } => {
// dirty, but must be &mut for SDL API.
// safe as long as we don't offer a &mut Surface in the API.
let (bytes, pitch) = frame.data_pitch_as_bytes().unwrap();
let data = unsafe {
core::slice::from_raw_parts_mut(bytes.as_ptr() as *mut u8, bytes.len())
};
if let Ok(surf) = Surface::from_data(data, *width, *height, pitch as u32, self.pixel_format) {
if self.surface.size() != (*width, *height) {
if let Ok(new) = Surface::new(*width, *height, self.pixel_format) {
self.surface = new;
}
}
let _ = surf.blit(None, &mut self.surface, None);
if let Ok(surf) = frame_to_surface(frame) {
if self.surface.size() != surf.size() {
let (width, height) = surf.size();
if let Ok(new) = Surface::new(width, height, self.pixel_format) {
self.surface = new;
}
}
_ => {}
let _ = surf.blit(None, &mut self.surface, None);
}
}