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test_readpixel.ino
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test_readpixel.ino
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#include <stdio.h>
#include <LovyanGFX.hpp>
static LGFX lcd;
static void tileRect(int x, int y, int w, int h, int tile, uint16_t color)
{
if (tile == 0) return;
int px = 0;
int py = 0;
for (int i = 0;i < h; i++) {
py = y + i;
for (int j = 0;j < w; j++) {
px = x + j;
switch (tile >> 1) {
case 0: if ((px+py)&4) { continue; }
case 1: if (px&2) { continue; }
case 2: if ((px+py)&2) { continue; }
case 3: if (px&1) { continue; }
}
if ( (px+py) & 1 ) { lcd.drawPixel(px, py, color); }
}
}
}
static void drawTile(int y, int h, uint16_t r, uint16_t g, uint16_t b)
{
uint16_t color = lcd.color565(r,g,b);
int step = 10;
int x1 = lcd.width() / step;
int x2 = (step-1) * lcd.width() / step;
lcd.fillRect(0, y, x2, h, 0);
lcd.fillRect(x2, y, lcd.width() - x2, h, color);
for (uint32_t i = 1; i < step; i++) {
x2 = i * lcd.width() / step;
tileRect(x1, y, x2 - x1, h, i, color);
x1 = x2;
}
}
static void drawStep(int y, int h, int step, uint32_t r, uint32_t g, uint32_t b)
{
int x1 = 0;
int x2 = 0;
for (uint32_t i = 0; i < step; i++) {
x2 = (i+1) * lcd.width() / step;
uint16_t color = i == 0 ? 0
: lcd.color565(r ? r*((i+1)>>1)/(step>>1) : 0
,g ? g*((i+1)>>1)/(step>>1) : 0
,b ? b*((i+1)>>1)/(step>>1) : 0);
lcd.fillRect( x1, y, x2 - x1, h
, color
);
x1 = x2;
}
}
static void drawGrad(int y, int h, uint16_t r, uint16_t g, uint16_t b)
{
int x1 = 0;
int x2 = 0;
for (int i = 0; i <= 256; i++) {
x2 = i * lcd.width() / 256;
if (x1 < x2) {
lcd.fillRect(x1, y, x2 - x1, h, lcd.color565(r*i>>8, g*i>>8, b*i>>8));
x1 = x2;
}
}
}
static void drawTestPattern(void)
{
int w = lcd.width() >> 5;
int h = (lcd.height() >> 5)+1;
int minwh = std::min(w,h);
drawGrad(h* 0, h, 255, 0, 0);
drawStep(h* 1, h,32 ,255, 0, 0);
drawStep(h* 2, h,16 ,255, 0, 0);
drawStep(h* 3, h, 8 ,255, 0, 0);
drawTile(h* 4, h, 255, 0, 0);
drawGrad(h* 5, h, 0, 255, 0);
drawStep(h* 6, h,32 , 0, 255, 0);
drawStep(h* 7, h,16 , 0, 255, 0);
drawStep(h* 8, h, 8 , 0, 255, 0);
drawTile(h* 9, h, 0, 255, 0);
drawGrad(h*10, h, 0, 0, 255);
drawStep(h*11, h,32 , 0, 0, 255);
drawStep(h*12, h,16 , 0, 0, 255);
drawStep(h*13, h, 8 , 0, 0, 255);
drawTile(h*14, h, 0, 0, 255);
drawGrad(h*15, h, 255, 255, 255);
drawStep(h*16, h,32 ,255, 255, 255);
drawStep(h*17, h,16 ,255, 255, 255);
drawStep(h*18, h, 8 ,255, 255, 255);
drawTile(h*19, h, 255, 255, 255);
for (int i = 0; i < minwh*6; i++) {
lcd.drawRect( i, h*20+i, w*8-(i<<1), h*12-(i<<1), lcd.color565(255-(i<<4),0,0));
lcd.drawRoundRect(w*8+i, h*20+i, w*8-(i<<1), h*12-(i<<1),(h*6-i)>>1, lcd.color565(0,255-(i<<4),0));
lcd.drawCircle( w*20 , h*26, i, lcd.color565(0,0,255-(i<<4)));
lcd.drawLine ( w*24, h*20 + (i<<1), lcd.width()-1, h*32-1-(i<<1), lcd.color565(i<<4,i<<4,255-(i<<4)));
lcd.drawLine ( lcd.width()-1-(i<<1), h*20, w*24+(i<<1), h*32-1, lcd.color565(255-(i<<4), i<<4,i<<4));
}
}
void setup(void)
{
lcd.init();
lcd.fillScreen(0x00FF);
}
void loop()
{
static int count = 0;
lcd.startWrite();
lcd.fillScreen(0);
lcd.setColorDepth((count & 1) ? 24 : 16);
lcd.setRotation((count>>1) & 7);
++count;
drawTestPattern();
lcd.setCursor(0, 10);
lcd.printf("color %d\nrotation %d", lcd.getColorDepth(), lcd.getRotation());
delay(500);
int16_t ie = std::min(lcd.width() , lcd.height()) - 2;
for (int i = 0; i < ie; ++i) {
lcd.copyRect(i, i+1, lcd.width() - (i<<1), lcd.height() - i - 1, i, i);
}
delay(500);
lcd.endWrite();
return;
}