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chore(ppu): use @ptrCast in drawTextMode

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-11-03 07:51:06 -03:00
parent c94913c1d0
commit 2c6a6a2ebb
1 changed files with 7 additions and 4 deletions
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11
src/core/ppu.zig
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@ -573,7 +573,7 @@ pub const Ppu = struct {
switch (bg_mode) {
0x0 => {
const framebuf_base = framebuf_pitch * @as(usize, scanline);
const framebuf_base = width * @as(usize, scanline);
if (obj_enable) self.fetchSprites();
var layer: usize = 0;
@ -588,7 +588,7 @@ pub const Ppu = struct {
self.drawTextMode(framebuf_base);
},
0x1 => {
const framebuf_base = framebuf_pitch * @as(usize, scanline);
const framebuf_base = width * @as(usize, scanline);
if (obj_enable) self.fetchSprites();
var layer: usize = 0;
@ -602,7 +602,7 @@ pub const Ppu = struct {
self.drawTextMode(framebuf_base);
},
0x2 => {
const framebuf_base = framebuf_pitch * @as(usize, scanline);
const framebuf_base = width * @as(usize, scanline);
if (obj_enable) self.fetchSprites();
var layer: usize = 0;
@ -666,12 +666,15 @@ pub const Ppu = struct {
// Copy Drawn Scanline to Frame Buffer
// If there are any nulls present in self.scanline.top() it means that no background drew a pixel there, so draw backdrop
// FIXME: @ptrCast between slices changing the length isn't implemented yet
const framebuf = @ptrCast([*]u32, @alignCast(@alignOf(u32), self.framebuf.get(.Emulator)));
for (self.scanline.top()) |maybe_px, i| {
const maybe_top = maybe_px;
const maybe_btm = self.scanline.btm()[i];
const bgr555 = self.getBgr555(maybe_top, maybe_btm);
std.mem.writeIntNative(u32, self.framebuf.get(.Emulator)[framebuf_base + i * @sizeOf(u32) ..][0..@sizeOf(u32)], rgba888(bgr555));
framebuf[framebuf_base + i] = rgba888(bgr555);
}
// Reset Current Scanline Pixel Buffer and list of fetched sprites