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Support axis flip for tiles

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Former-commit-id: daefb380ab2dfcee600297690dcc0c7c1a37f911
This commit is contained in:
Michel Heily 2019-07-29 09:46:12 +03:00
parent 90edebbe82
commit f862209911
2 changed files with 46 additions and 20 deletions
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34
src/core/gpu.rs
View file

@ -232,11 +232,19 @@ impl Gpu {
&self,
sysbus: &SysBus,
addr: Addr,
x: u32,
y: u32,
mut x: u32,
mut y: u32,
width: u32,
format: PixelFormat,
x_flip: bool,
y_flip: bool,
) -> usize {
if x_flip {
x = 7 - x;
}
if y_flip {
y = 7 - x;
}
match format {
PixelFormat::BPP4 => {
let byte = sysbus.read_8(addr + width * y + x / 2);
@ -268,13 +276,11 @@ impl Gpu {
let py = self.current_scanline as u32;
for tile in 0..tiles_per_row {
let tile_y = py % 8;
let map_index = tile + (py / 8) * tiles_per_row;
let map_addr = tilemap_base + 2 * map_index;
let entry = TileMapEntry::from(sysbus.read_16(map_addr));
let tile_addr = tileset_base + entry.tile_index * tile_size;
let tile_y = py % 8;
for tile_x in 0..=7 {
let color = match pixel_format {
PixelFormat::BPP4 => {
@ -285,6 +291,8 @@ impl Gpu {
tile_y as u32,
4,
pixel_format,
entry.x_flip,
entry.y_flip,
);
self.get_palette_color(sysbus, index as u32, entry.palette_bank as u32)
}
@ -296,12 +304,16 @@ impl Gpu {
tile_y as u32,
8,
pixel_format,
entry.x_flip,
entry.y_flip,
);
self.get_palette_color(sysbus, index as u32, 0)
}
};
if color.get_rgb24() != (0, 0, 0) {
self.pixeldata[((px + tile_x) as usize) + (py as usize) * 512] = color;
}
}
px += 8;
if px == bgcnt.screen_width as u32 {
return;
@ -340,13 +352,17 @@ impl Gpu {
let dispcnt = DisplayControl::from(sysbus.ioregs.read_reg(REG_DISPCNT));
match dispcnt.bg_mode {
BGMode::BGMode0 | BGMode::BGMode2 => {
for bg in 0..3 {
BGMode::BGMode0 => {
for bg in (0..3).rev() {
if dispcnt.disp_bg[bg] {
self.scanline_mode0(bg as u32, sysbus);
}
}
}
BGMode::BGMode2 => {
self.scanline_mode0(2, sysbus);
self.scanline_mode0(3, sysbus);
}
BGMode::BGMode3 => {
self.scanline_mode3(2, sysbus);
}
@ -439,10 +455,6 @@ impl EmuIoDev for Gpu {
}
}
// let mut dispcnt = DisplayControl::from(sysbus.ioregs.read_reg(REG_DISPCNT));
// let mut dispstat = DisplayStatus::from(sysbus.ioregs.read_reg(REG_DISPSTAT));
// TODO
(0, None)
}
}

30
src/debugger/tile_view.rs
View file

@ -30,22 +30,36 @@ fn draw_tile(
for x in 0..8 {
let color = match pixel_format {
PixelFormat::BPP4 => {
let index =
gba.gpu
.read_pixel_index(&gba.sysbus, tile_addr, x, y, 4, pixel_format);
gba.gpu.get_palette_color(&gba.sysbus, index as u32, 3)
let index = gba.gpu.read_pixel_index(
&gba.sysbus,
tile_addr,
x,
y,
4,
pixel_format,
false,
false,
);
gba.gpu.get_palette_color(&gba.sysbus, index as u32, 0xf)
}
PixelFormat::BPP8 => {
let index =
gba.gpu
.read_pixel_index(&gba.sysbus, tile_addr, x, y, 8, pixel_format);
let index = gba.gpu.read_pixel_index(
&gba.sysbus,
tile_addr,
x,
y,
8,
pixel_format,
false,
false,
);
gba.gpu.get_palette_color(&gba.sysbus, index as u32, 0)
}
};
let (r, g, b) = color.get_rgb24();
canvas.set_draw_color(Color::RGB(r, g, b));
canvas.draw_point(p.offset(x as i32, y as i32));
canvas.draw_point(p.offset(x as i32, y as i32)).unwrap();
}
}
}