aiie/teensy/ILI9341_wrap.cpp
2022-02-02 07:17:05 -05:00

112 lines
3.2 KiB
C++

#include "ILI9341_wrap.h"
#include "images.h"
#include "globals.h"
#include "appledisplay.h"
#define _332To565(c) ((((c) & 0xe0) << 8) | (((c) & 0x1c) << 6) | ((c) & 0x03))
ILI9341_Wrap::ILI9341_Wrap(const uint8_t cs_pin, const uint8_t rst_pin, const uint8_t mosi_pin, const uint8_t sck_pin, const uint8_t miso_pin, const uint8_t dc_pin) : BaseDisplay(cs_pin, rst_pin, mosi_pin, sck_pin, miso_pin, dc_pin)
{
tft = NULL;
frame_buffer = NULL;
_cs = cs_pin;
_dc = dc_pin;
_rst = rst_pin;
_mosi = mosi_pin;
_sck = sck_pin;
_miso = miso_pin;
}
ILI9341_Wrap::~ILI9341_Wrap()
{
if (tft)
delete tft;
}
void ILI9341_Wrap::begin(uint32_t spi_clock=30000000u, uint32_t spi_clock_read=2000000)
{
if (!tft) {
tft = new ILI9341_t3n(_cs, _dc, _rst, _mosi, _sck, _miso);
tft->begin(spi_clock, spi_clock_read);
tft->setRotation(3);
}
}
void ILI9341_Wrap::fillWindow(uint16_t color = 0x0000)
{
}
void ILI9341_Wrap::setFrameBuffer(uint8_t *frame_buffer)
{
if (tft) {
tft->fillScreen(ILI9341_BLACK);
this->frame_buffer = (uint16_t *)frame_buffer;
tft->setFrameBuffer((uint16_t *)frame_buffer);
tft->useFrameBuffer(true);
}
}
bool ILI9341_Wrap::asyncUpdateActive()
{
return tft ? tft->asyncUpdateActive() : false;
}
bool ILI9341_Wrap::updateScreenAsync(bool update_cont)
{
return tft ? tft->updateScreenAsync(update_cont) : false;
}
void ILI9341_Wrap::drawPixel(int16_t x, int16_t y, uint16_t color)
{
if (x>=320 || y>=240)
return;
frame_buffer[y*ILI9341_WIDTH+x] = color;
}
// The 9341 is half the width we need, so this jumps through hoops to
// reduce the resolution in a way that's reasonable by blending pixels
void ILI9341_Wrap::cacheApplePixel(uint16_t x, uint16_t y, uint16_t color)
{
if (x>=560 || y>=192)
return;
if (x&1) {
uint16_t origColor =frame_buffer[(y+SCREENINSET_9341_Y)*ILI9341_WIDTH+(x>>1)+SCREENINSET_9341_X];
if (g_displayType == m_blackAndWhite) {
// There are four reasonable decisions here: if either pixel
// *was* on, then it's on; if both pixels *were* on, then it's
// on; and if the blended value of the two pixels were on,
// then it's on; or if the blended value of the two is above
// some certain overall brightness, then it's on. This is the
// last of those - where the brightness cutoff is defined in
// the bios as g_luminanceCutoff.
uint16_t blendedColor = blendColors(origColor, color);
uint16_t luminance = luminanceFromRGB(_565toR(blendedColor),
_565toG(blendedColor),
_565toB(blendedColor));
cacheDoubleWideApplePixel(x>>1,y,(uint16_t)((luminance >= g_luminanceCutoff) ? 0xFFFF : 0x0000));
} else {
cacheDoubleWideApplePixel(x>>1, y, color);
}
} else {
// All of the even pixels get drawn...
cacheDoubleWideApplePixel(x>>1, y, color);
}
}
void ILI9341_Wrap::cacheDoubleWideApplePixel(uint16_t x, uint16_t y, uint16_t color16)
{
if (x>=280 || y>=192)
return;
frame_buffer[(y+SCREENINSET_9341_Y)*ILI9341_WIDTH + (x) + SCREENINSET_9341_X] = color16;
}
uint32_t ILI9341_Wrap::frameCount()
{
return tft ? tft->frameCount() : 0;
}