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//#define DRAW_PERF_PRINT
#include <cstring>
#include <cassert>
#include <thread>
#include <kms++/kms++.h>
#include <kms++util/kms++util.h>
using namespace std;
namespace kms
{
static RGB get_test_pattern_pixel(IMappedFramebuffer& fb, unsigned x, unsigned y)
{
const unsigned w = fb.width();
const unsigned h = fb.height();
const unsigned mw = 20;
const unsigned xm1 = mw;
const unsigned xm2 = w - mw - 1;
const unsigned ym1 = mw;
const unsigned ym2 = h - mw - 1;
// white margin lines
if (x == xm1 || x == xm2 || y == ym1 || y == ym2)
return RGB(255, 255, 255);
// white box outlines to corners
else if ((x == 0 || x == w - 1) && (y < ym1 || y > ym2))
return RGB(255, 255, 255);
// white box outlines to corners
else if ((y == 0 || y == h - 1) && (x < xm1 || x > xm2))
return RGB(255, 255, 255);
// blue bar on the left
else if (x < xm1 && (y > ym1 && y < ym2))
return RGB(0, 0, 255);
// blue bar on the top
else if (y < ym1 && (x > xm1 && x < xm2))
return RGB(0, 0, 255);
// red bar on the right
else if (x > xm2 && (y > ym1 && y < ym2))
return RGB(255, 0, 0);
// red bar on the bottom
else if (y > ym2 && (x > xm1 && x < xm2))
return RGB(255, 0, 0);
// inside the margins
else if (x > xm1 && x < xm2 && y > ym1 && y < ym2) {
// diagonal line
if (x == y || w - x == h - y)
return RGB(255, 255, 255);
// diagonal line
else if (w - x == y || x == h - y)
return RGB(255, 255, 255);
else {
int t = (x - xm1 - 1) * 8 / (xm2 - xm1 - 1);
unsigned r = 0, g = 0, b = 0;
unsigned c = (y - ym1 - 1) % 256;
switch (t) {
case 0:
r = c;
break;
case 1:
g = c;
break;
case 2:
b = c;
break;
case 3:
g = b = c;
break;
case 4:
r = b = c;
break;
case 5:
r = g = c;
break;
case 6:
r = g = b = c;
break;
case 7:
break;
}
return RGB(r, g, b);
}
} else {
// black corners
return RGB(0, 0, 0);
}
}
static void draw_test_pattern_part(IMappedFramebuffer& fb, unsigned start_y, unsigned end_y)
{
unsigned x, y;
unsigned w = fb.width();
switch (fb.format()) {
case PixelFormat::XRGB8888:
case PixelFormat::XBGR8888:
case PixelFormat::ARGB8888:
case PixelFormat::ABGR8888:
case PixelFormat::RGB565:
for (y = start_y; y < end_y; y++) {
for (x = 0; x < w; x++) {
RGB pixel = get_test_pattern_pixel(fb, x, y);
draw_rgb_pixel(fb, x, y, pixel);
}
}
break;
case PixelFormat::UYVY:
case PixelFormat::YUYV:
case PixelFormat::YVYU:
case PixelFormat::VYUY:
for (y = start_y; y < end_y; y++) {
for (x = 0; x < w; x += 2) {
RGB pixel1 = get_test_pattern_pixel(fb, x, y);
RGB pixel2 = get_test_pattern_pixel(fb, x + 1, y);
draw_yuv422_macropixel(fb, x, y, pixel1.yuv(), pixel2.yuv());
}
}
break;
case PixelFormat::NV12:
case PixelFormat::NV21:
for (y = start_y; y < end_y; y += 2) {
for (x = 0; x < w; x += 2) {
RGB pixel00 = get_test_pattern_pixel(fb, x, y);
RGB pixel10 = get_test_pattern_pixel(fb, x + 1, y);
RGB pixel01 = get_test_pattern_pixel(fb, x, y + 1);
RGB pixel11 = get_test_pattern_pixel(fb, x + 1, y + 1);
draw_yuv420_macropixel(fb, x, y,
pixel00.yuv(), pixel10.yuv(),
pixel01.yuv(), pixel11.yuv());
}
}
break;
default:
throw std::invalid_argument("unknown pixelformat");
}
}
static void draw_test_pattern_impl(IMappedFramebuffer& fb)
{
if (fb.height() < 20) {
draw_test_pattern_part(fb, 0, fb.height());
return;
}
unsigned num_threads = thread::hardware_concurrency();
vector<thread> workers;
unsigned part = (fb.height() / num_threads) & ~1;
for (unsigned n = 0; n < num_threads; ++n) {
unsigned start = n * part;
unsigned end = start + part;
if (n == num_threads - 1)
end = fb.height();
workers.push_back(thread([&fb, start, end]() { draw_test_pattern_part(fb, start, end); }));
}
for (thread& t : workers)
t.join();
}
void draw_test_pattern(IMappedFramebuffer &fb)
{
#ifdef DRAW_PERF_PRINT
Stopwatch sw;
sw.start();
#endif
draw_test_pattern_impl(fb);
#ifdef DRAW_PERF_PRINT
double us = sw.elapsed_us();
printf("draw took %u us\n", (unsigned)us);
#endif
}
}
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