show 565 directly.

kivikakk · Jun 11, 2024 · 4a7cf51 · 4a7cf51
1 parent 22ed7b8
commit 4a7cf51
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Showing 2 changed files with 5 additions and 10 deletions.
diff --git a/cxxrtl/src/SimThread.zig b/cxxrtl/src/SimThread.zig
@@ -9,7 +9,7 @@ const SimThread = @This();
 
 pub const WIDTH = 320;
 pub const HEIGHT = 240;
-pub const Color = packed struct(u32) { r: u8, g: u8, b: u8, a: u8 };
+pub const Color = packed struct(u16) { r: u5, g: u6, b: u5 };
 pub const ImgData = [HEIGHT * WIDTH]Color;
 
 sim_controller: *SimController,
@@ -24,7 +24,7 @@ reset: Cxxrtl.Object(bool),
 spi_connector: SpiConnector,
 uart_connector: UartConnector,
 
-img_data: ImgData = [_]Color{.{ .r = 0, .g = 0, .b = 0, .a = 255 }} ** (HEIGHT * WIDTH),
+img_data: ImgData = [_]Color{.{ .r = 0, .g = 0, .b = 0 }} ** (HEIGHT * WIDTH),
 img_data_new: bool = true,
 
 pub fn init(alloc: std.mem.Allocator, sim_controller: *SimController) SimThread {
@@ -151,12 +151,7 @@ pub fn run(self: *SimThread) !void {
                         const g: u6 = @truncate(((data0 & 0b111) << 3) | (data >> 5));
                         const b: u5 = @truncate(data & 0b00011111);
 
-                        self.img_data[@as(usize, pag) * WIDTH + col] = .{
-                            .r = @as(u8, r) << 3,
-                            .g = @as(u8, g) << 2,
-                            .b = @as(u8, b) << 3,
-                            .a = 255,
-                        };
+                        self.img_data[@as(usize, pag) * WIDTH + col] = .{ .r = r, .g = g, .b = b };
                         self.img_data_new = true;
 
                         state = .MemoryWriteA;

diff --git a/cxxrtl/src/main.zig b/cxxrtl/src/main.zig
@@ -35,7 +35,7 @@ pub fn main() !void {
     });
     defer renderer.destroy();
 
-    var itexture = try SDL.createTexture(renderer, .abgr8888, .streaming, SimThread.WIDTH, SimThread.HEIGHT);
+    var itexture = try SDL.createTexture(renderer, .bgr565, .streaming, SimThread.WIDTH, SimThread.HEIGHT);
     defer itexture.destroy();
 
     var ticks_last = SDL.getTicks64();
@@ -68,7 +68,7 @@ pub fn main() !void {
             var pix = try itexture.lock(null);
             defer pix.release();
 
-            std.debug.assert(pix.stride == SimThread.WIDTH * 4);
+            std.debug.assert(pix.stride == SimThread.WIDTH * 2);
             @memcpy(@as(*SimThread.ImgData, @ptrCast(@alignCast(pix.pixels))), &img_data);
         }