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#include <chrono>
#include <cstring>
#include <cassert>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <drm_fourcc.h>
#include <drm.h>
#include <drm_mode.h>
#include "card.h"
#include "framebuffer.h"
#include "testpat.h"
#include "color.h"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
namespace kms
{
static void draw_pixel(Framebuffer& buf, unsigned x, unsigned y, RGB color)
{
static RGB c1;
switch (buf.format()) {
case DRM_FORMAT_XRGB8888:
{
uint32_t *p = (uint32_t*)(buf.map(0) + buf.stride(0) * y + x * 4);
*p = color.raw;
break;
}
case DRM_FORMAT_RGB565:
{
uint16_t *p = (uint16_t*)(buf.map(0) + buf.stride(0) * y + x * 2);
*p = color.rgb565();
break;
}
case DRM_FORMAT_UYVY:
{
if ((x & 1) == 0) {
c1 = color;
return;
}
uint8_t *p = (uint8_t*)(buf.map(0) + buf.stride(0) * y + x * 2);
YUV yuv1 = c1.yuv();
YUV yuv2 = color.yuv();
p[0] = (yuv1.u + yuv2.u) / 2;
p[1] = yuv1.y;
p[2] = (yuv1.v + yuv2.v) / 2;
p[3] = yuv2.y;
break;
}
case DRM_FORMAT_YUYV:
{
if ((x & 1) == 0) {
c1 = color;
return;
}
uint8_t *p = (uint8_t*)(buf.map(0) + buf.stride(0) * y + x * 2);
YUV yuv1 = c1.yuv();
YUV yuv2 = color.yuv();
p[0] = yuv1.y;
p[1] = (yuv1.u + yuv2.u) / 2;
p[2] = yuv2.y;
p[3] = (yuv1.v + yuv2.v) / 2;
break;
}
}
}
static void draw_rgb_test_pattern(Framebuffer& fb)
{
unsigned x, y;
unsigned w = fb.width();
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;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
// white margin lines
if (x == xm1 || x == xm2 || y == ym1 || y == ym2)
draw_pixel(fb, x, y, RGB(255, 255, 255));
// white box outlines to corners
else if ((x == 0 || x == w - 1) && (y < ym1 || y > ym2))
draw_pixel(fb, x, y, RGB(255, 255, 255));
// white box outlines to corners
else if ((y == 0 || y == h - 1) && (x < xm1 || x > xm2))
draw_pixel(fb, x, y, RGB(255, 255, 255));
// blue bar on the left
else if (x < xm1 && (y > ym1 && y < ym2))
draw_pixel(fb, x, y, RGB(0, 0, 255));
// blue bar on the top
else if (y < ym1 && (x > xm1 && x < xm2))
draw_pixel(fb, x, y, RGB(0, 0, 255));
// red bar on the right
else if (x > xm2 && (y > ym1 && y < ym2))
draw_pixel(fb, x, y, RGB(255, 0, 0));
// red bar on the bottom
else if (y > ym2 && (x > xm1 && x < xm2))
draw_pixel(fb, x, y, 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)
draw_pixel(fb, x, y, RGB(255, 255, 255));
// diagonal line
else if (w - x == y || x == h - y)
draw_pixel(fb, x, y, RGB(255, 255, 255));
else {
int t = (x - xm1 - 1) * 3 / (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;
}
draw_pixel(fb, x, y, RGB(r, g, b));
}
// black corners
} else {
draw_pixel(fb, x, y, RGB(0, 0, 0));
}
}
}
}
void draw_test_pattern(Framebuffer& fb)
{
using namespace std::chrono;
auto t1 = high_resolution_clock::now();
draw_rgb_test_pattern(fb);
auto t2 = high_resolution_clock::now();
auto time_span = duration_cast<microseconds>(t2 - t1);
printf("draw took %u us\n", (unsigned)time_span.count());
}
}
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