Mod: added Code quotes.
endmodule
C-like:
module image_overlay (
input clk,
input rst,
input [7:0] image1_data, // assuming 8-bit grayscale image
input [7:0] image2_data,
input [7:0] overlay_mask, // 8-bit mask for overlaying
output reg [7:0] combined_data,
output reg vsync,
output reg hsync
);
// Define image dimensions
parameter WIDTH = 320; // assuming 320 pixels width
parameter HEIGHT = 240; // assuming 240 pixels height
// Define counters for tracking image positions
reg [9:0] x_counter;
reg [9:0] y_counter;
always @(posedge clk or posedge rst) begin
if (rst) begin
x_counter <= 0;
y_counter <= 0;
combined_data <= 8'b00000000; // initialize combined_data
vsync <= 0;
hsync <= 0;
end
else begin
// Increment counters
if (x_counter == WIDTH - 1) begin
x_counter <= 0;
if (y_counter == HEIGHT - 1) begin
y_counter <= 0;
end
else begin
y_counter <= y_counter + 1;
end
end
else begin
x_counter <= x_counter + 1;
end
// Overlay logic
if (overlay_mask >= 128) begin // if mask pixel is white (or close to it)
combined_data <= image2_data; // overlay image
end
else begin
combined_data <= image1_data; // otherwise, use base image
end
// Output synchronization signals
if (y_counter == HEIGHT - 1 && x_counter == WIDTH - 1) begin
vsync <= 1;
hsync <= 1;
end
else begin
vsync <= 0;
if (x_counter == WIDTH - 1) begin
hsync <= 1;
end
else begin
hsync <= 0;
end
end
end
end
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