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////////////////////////////////////////////////////////////////////////////////
// _____ _ _ _____ _ _
// |_ _| (_) | | / ____| | | |
// | | _ __ ___ _ __ ___ _ __ _ __ _| | | | ___ | | | ___ __ _ ___
// | | | '_ ` _ \| '_ \ / _ \ '__| |/ _` | | | | / _ \| | |/ _ \/ _` |/ _ \
// _| |_| | | | | | |_) | __/ | | | (_| | | | |___| (_) | | | __/ (_| | __/
// |_____|_| |_| |_| .__/ \___|_| |_|\__,_|_| \_____\___/|_|_|\___|\__, |\___|
// | | __/ |
// |_| |___/
// _ _
// | | | |
// | | ___ _ __ __| | ___ _ __
// | | / _ \| '_ \ / _` |/ _ \| '_ \
// | |___| (_) | | | | (_| | (_) | | | |
// |______\___/|_| |_|\__,_|\___/|_| |_|
//
////////////////////////////////////////////////////////////////////////////////
// File: vga_mouse_square.cpp
// Description: video to vga with mouse pointer - real-time processing
// By: rad09
////////////////////////////////////////////////////////////////////////////////
// this hardware block receives the VGA scanning coordinates,
// the mouse coordinates and then replaces the mouse pointer
// with a different value for the pixel
////////////////////////////////////////////////////////////////////////////////
// Catapult Project options
// Constraint Editor:
// Frequency: 27 MHz
// Top design: vga_mouse_square
// clk>reset sync: disable; reset async: enable; enable: enable
// Architecture Constraint:
// core>main: enable pipeline + loop can be merged
////////////////////////////////////////////////////////////////////////////////
#include "stdio.h"
#include "ac_int.h"
#define COLOR_WL 10
#define PIXEL_WL (3*COLOR_WL)
#define COORD_WL 10
#pragma hls_design top
void vga_mouse_square(ac_int<(COORD_WL+COORD_WL), false> * vga_xy, ac_int<(COORD_WL+COORD_WL), false> * mouse_xy, ac_int<(8), false> cursor_size,
ac_int<PIXEL_WL, false> * video_in, ac_int<PIXEL_WL, false> * video_out)
{
ac_int<10, false> i_red, i_green, i_blue; // current pixel
ac_int<10, false> o_red, o_green, o_blue; // output pixel
ac_int<10, false> mouse_x, mouse_y, vga_x, vga_y; // mouse and screen coordinates
/* --extract the 3 color components from the 30 bit signal--
the 2 blocks are identical - you can shift and mask the desired bits or "slice" the signal <length>(location)
i_red = *video_in >> 20;
i_green = (*video_in >> 10) & (ac_int<10>)1023;
i_blue = *video_in & ((ac_int<10>)1023);
*/
i_red = (*video_in).slc<COLOR_WL>(20);
i_green = (*video_in).slc<COLOR_WL>(10);
i_blue = (*video_in).slc<COLOR_WL>(0);
// extract mouse X-Y coordinates
mouse_x = (*mouse_xy).slc<COORD_WL>(0);
mouse_y = (*mouse_xy).slc<COORD_WL>(10);
// extract VGA pixel X-Y coordinates
vga_x = (*vga_xy).slc<COORD_WL>(0);
vga_y = (*vga_xy).slc<COORD_WL>(10);
/// something here...
/// show pixel
if ((vga_x >= mouse_x - cursor_size) && (vga_x <= mouse_x + cursor_size) && (vga_y >= mouse_y - cursor_size) && (vga_y <= mouse_y + cursor_size)){
// if it is inside the mouse square
o_red = 0;
o_green = i_green;
o_blue = 0;
}
else {
// if it is outside the mouse square
o_red = i_red;
o_green = i_green;
o_blue = i_blue;
}
// combine the 3 color components into 1 signal only
*video_out = ((((ac_int<PIXEL_WL, false>)o_red) << 20) | (((ac_int<PIXEL_WL, false>)o_green) << 10) | (ac_int<PIXEL_WL, false>)o_blue);
}
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