mirror of
https://github.com/JorjBauer/aiie.git
synced 2024-11-26 11:49:19 +00:00
561 lines
17 KiB
C++
561 lines
17 KiB
C++
#include <ctype.h> // isgraph
|
||
#include "teensy-display.h"
|
||
|
||
#include "bios-font.h"
|
||
#include "display-bg.h"
|
||
|
||
#define RS 16
|
||
#define WR 17
|
||
#define CS 18
|
||
#define RST 19
|
||
|
||
// Ports C&D of the Teensy connected to DB of the display
|
||
#define DB_0 15
|
||
#define DB_1 22
|
||
#define DB_2 23
|
||
#define DB_3 9
|
||
#define DB_4 10
|
||
#define DB_5 13
|
||
#define DB_6 11
|
||
#define DB_7 12
|
||
#define DB_8 2
|
||
#define DB_9 14
|
||
#define DB_10 7
|
||
#define DB_11 8
|
||
#define DB_12 6
|
||
#define DB_13 20
|
||
#define DB_14 21
|
||
#define DB_15 5
|
||
|
||
#define disp_x_size 239
|
||
#define disp_y_size 319
|
||
|
||
#define setPixel(color) { LCD_Write_DATA(((color)>>8),((color)&0xFF)); } // 565 RGB
|
||
|
||
#include "globals.h"
|
||
#include "applevm.h"
|
||
|
||
// RGB map of each of the lowres colors
|
||
const uint16_t loresPixelColors[16] = { 0x0000, // 0 black
|
||
0xC006, // 1 magenta
|
||
0x0010, // 2 dark blue
|
||
0xA1B5, // 3 purple
|
||
0x0480, // 4 dark green
|
||
0x6B4D, // 5 dark grey
|
||
0x1B9F, // 6 med blue
|
||
0x0DFD, // 7 light blue
|
||
0x92A5, // 8 brown
|
||
0xF8C5, // 9 orange
|
||
0x9555, // 10 light gray
|
||
0xFCF2, // 11 pink
|
||
0x07E0, // 12 green
|
||
0xFFE0, // 13 yellow
|
||
0x87F0, // 14 aqua
|
||
0xFFFF // 15 white
|
||
};
|
||
|
||
TeensyDisplay::TeensyDisplay()
|
||
{
|
||
pinMode(DB_8, OUTPUT);
|
||
pinMode(DB_9, OUTPUT);
|
||
pinMode(DB_10, OUTPUT);
|
||
pinMode(DB_11, OUTPUT);
|
||
pinMode(DB_12, OUTPUT);
|
||
pinMode(DB_13, OUTPUT);
|
||
pinMode(DB_14, OUTPUT);
|
||
pinMode(DB_15, OUTPUT);
|
||
pinMode(DB_0, OUTPUT);
|
||
pinMode(DB_1, OUTPUT);
|
||
pinMode(DB_2, OUTPUT);
|
||
pinMode(DB_3, OUTPUT);
|
||
pinMode(DB_4, OUTPUT);
|
||
pinMode(DB_5, OUTPUT);
|
||
pinMode(DB_6, OUTPUT);
|
||
pinMode(DB_7, OUTPUT);
|
||
|
||
P_RS = portOutputRegister(digitalPinToPort(RS));
|
||
B_RS = digitalPinToBitMask(RS);
|
||
P_WR = portOutputRegister(digitalPinToPort(WR));
|
||
B_WR = digitalPinToBitMask(WR);
|
||
P_CS = portOutputRegister(digitalPinToPort(CS));
|
||
B_CS = digitalPinToBitMask(CS);
|
||
P_RST = portOutputRegister(digitalPinToPort(RST));
|
||
B_RST = digitalPinToBitMask(RST);
|
||
|
||
pinMode(RS,OUTPUT);
|
||
pinMode(WR,OUTPUT);
|
||
pinMode(CS,OUTPUT);
|
||
pinMode(RST,OUTPUT);
|
||
|
||
// begin initialization
|
||
|
||
sbi(P_RST, B_RST);
|
||
delay(5);
|
||
cbi(P_RST, B_RST);
|
||
delay(15);
|
||
sbi(P_RST, B_RST);
|
||
delay(15);
|
||
|
||
cbi(P_CS, B_CS);
|
||
|
||
LCD_Write_COM_DATA(0x00,0x0001); // oscillator start [enable]
|
||
LCD_Write_COM_DATA(0x03,0xA8A4); // power control [%1010 1000 1010 1000] == DCT3, DCT1, BT2, DC3, DC1, AP2
|
||
LCD_Write_COM_DATA(0x0C,0x0000); // power control2 [0]
|
||
LCD_Write_COM_DATA(0x0D,0x080C); // power control3 [VRH3, VRH2, invalid bits]
|
||
LCD_Write_COM_DATA(0x0E,0x2B00); // power control4 VCOMG, VDV3, VDV1, VDV0
|
||
LCD_Write_COM_DATA(0x1E,0x00B7); // power control5 nOTP, VCM5, VCM4, VCM2, VCM1, VCM0
|
||
// LCD_Write_COM_DATA(0x01,0x2B3F); // driver control output REV, BGR, TB, MUX8, MUX5, MUX4, MUX3, MUX2, MUX1, MUX0
|
||
// Change that: TB = 0 please
|
||
LCD_Write_COM_DATA(0x01,0x293F); // driver control output REV, BGR, TB, MUX8, MUX5, MUX4, MUX3, MUX2, MUX1, MUX0
|
||
// LCD_Write_COM_DATA(0x01,0x693F); // driver control output RL, REV, BGR, TB, MUX8, MUX5, MUX4, MUX3, MUX2, MUX1, MUX0
|
||
|
||
|
||
LCD_Write_COM_DATA(0x02,0x0600); // LCD drive AC control B/C, EOR
|
||
LCD_Write_COM_DATA(0x10,0x0000); // sleep mode 0
|
||
// Change the (Y) order here to match above (TB=0)
|
||
//LCD_Write_COM_DATA(0x11,0x6070); // Entry mode DFM1, DFM0, TY0, ID1, ID0
|
||
//LCD_Write_COM_DATA(0x11,0x6050); // Entry mode DFM1, DFM0, TY0, ID0
|
||
LCD_Write_COM_DATA(0x11,0x6078); // Entry mode DFM1, DFM0, TY0, ID1, ID0, AM
|
||
|
||
LCD_Write_COM_DATA(0x05,0x0000); // compare reg1
|
||
LCD_Write_COM_DATA(0x06,0x0000); // compare reg2
|
||
LCD_Write_COM_DATA(0x16,0xEF1C); // horiz porch (default)
|
||
LCD_Write_COM_DATA(0x17,0x0003); // vertical porch
|
||
LCD_Write_COM_DATA(0x07,0x0233); // display control VLE1, GON, DTE, D1, D0
|
||
LCD_Write_COM_DATA(0x0B,0x0000); // frame cycle control
|
||
LCD_Write_COM_DATA(0x0F,0x0000); // gate scan start posn
|
||
LCD_Write_COM_DATA(0x41,0x0000); // vertical scroll control1
|
||
LCD_Write_COM_DATA(0x42,0x0000); // vertical scroll control2
|
||
LCD_Write_COM_DATA(0x48,0x0000); // first window start
|
||
LCD_Write_COM_DATA(0x49,0x013F); // first window end (0x13f == 319)
|
||
LCD_Write_COM_DATA(0x4A,0x0000); // second window start
|
||
LCD_Write_COM_DATA(0x4B,0x0000); // second window end
|
||
LCD_Write_COM_DATA(0x44,0xEF00); // horiz ram addr posn
|
||
LCD_Write_COM_DATA(0x45,0x0000); // vert ram start posn
|
||
LCD_Write_COM_DATA(0x46,0x013F); // vert ram end posn
|
||
LCD_Write_COM_DATA(0x30,0x0707); // γ control
|
||
LCD_Write_COM_DATA(0x31,0x0204);//
|
||
LCD_Write_COM_DATA(0x32,0x0204);//
|
||
LCD_Write_COM_DATA(0x33,0x0502);//
|
||
LCD_Write_COM_DATA(0x34,0x0507);//
|
||
LCD_Write_COM_DATA(0x35,0x0204);//
|
||
LCD_Write_COM_DATA(0x36,0x0204);//
|
||
LCD_Write_COM_DATA(0x37,0x0502);//
|
||
LCD_Write_COM_DATA(0x3A,0x0302);//
|
||
LCD_Write_COM_DATA(0x3B,0x0302);//
|
||
LCD_Write_COM_DATA(0x23,0x0000);// RAM write data mask1
|
||
LCD_Write_COM_DATA(0x24,0x0000); // RAM write data mask2
|
||
LCD_Write_COM_DATA(0x25,0x8000); // frame frequency (OSC3)
|
||
LCD_Write_COM_DATA(0x4f,0x0000); // Set GDDRAM Y address counter
|
||
LCD_Write_COM_DATA(0x4e,0x0000); // Set GDDRAM X address counter
|
||
#if 0
|
||
// Set data access speed optimization (?)
|
||
LCD_Write_COM_DATA(0x28, 0x0006);
|
||
LCD_Write_COM_DATA(0x2F, 0x12BE);
|
||
LCD_Write_COM_DATA(0x12, 0x6CEB);
|
||
#endif
|
||
|
||
LCD_Write_COM(0x22); // RAM data write
|
||
sbi(P_CS, B_CS);
|
||
|
||
// LCD initialization complete
|
||
|
||
|
||
setColor(255, 255, 255);
|
||
|
||
clrScr();
|
||
|
||
}
|
||
|
||
TeensyDisplay::~TeensyDisplay()
|
||
{
|
||
}
|
||
|
||
void TeensyDisplay::_fast_fill_16(int ch, int cl, long pix)
|
||
{
|
||
*(volatile uint8_t *)(&GPIOD_PDOR) = ch;
|
||
*(volatile uint8_t *)(&GPIOC_PDOR) = cl;
|
||
uint16_t blocks = pix / 16;
|
||
|
||
for (uint16_t i=0; i<blocks; i++) {
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
pulse_low(P_WR, B_WR);
|
||
}
|
||
if ((pix % 16) != 0) {
|
||
for (int i=0; i<(pix % 16); i++)
|
||
{
|
||
pulse_low(P_WR, B_WR);
|
||
}
|
||
}
|
||
}
|
||
|
||
void TeensyDisplay::redraw()
|
||
{
|
||
cbi(P_CS, B_CS);
|
||
clrXY();
|
||
sbi(P_RS, B_RS);
|
||
|
||
moveTo(0, 0);
|
||
|
||
for (int y=0; y<240; y++) {
|
||
for (int x=0; x<320; x++) {
|
||
uint8_t r = pgm_read_byte(&displayBitmap[(y * 320 + x)*3 + 0]);
|
||
uint8_t g = pgm_read_byte(&displayBitmap[(y * 320 + x)*3 + 1]);
|
||
uint8_t b = pgm_read_byte(&displayBitmap[(y * 320 + x)*3 + 2]);
|
||
uint16_t color16 = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3);
|
||
setPixel(color16);
|
||
}
|
||
}
|
||
|
||
if (g_vm) {
|
||
drawDriveDoor(0, ((AppleVM *)g_vm)->DiskName(0)[0] == '\0');
|
||
drawDriveDoor(1, ((AppleVM *)g_vm)->DiskName(1)[0] == '\0');
|
||
}
|
||
|
||
cbi(P_CS, B_CS);
|
||
clrXY();
|
||
sbi(P_RS, B_RS);
|
||
}
|
||
|
||
void TeensyDisplay::clrScr()
|
||
{
|
||
cbi(P_CS, B_CS);
|
||
clrXY();
|
||
sbi(P_RS, B_RS);
|
||
_fast_fill_16(0, 0, ((disp_x_size+1)*(disp_y_size+1)));
|
||
sbi(P_CS, B_CS);
|
||
}
|
||
|
||
// The display flips X and Y, so expect to see "x" as "vertical"
|
||
// and "y" as "horizontal" here...
|
||
void TeensyDisplay::setYX(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
|
||
{
|
||
LCD_Write_COM_DATA(0x44, (y2<<8)+y1); // Horiz start addr, Horiz end addr
|
||
LCD_Write_COM_DATA(0x45, x1); // vert start pos
|
||
LCD_Write_COM_DATA(0x46, x2); // vert end pos
|
||
LCD_Write_COM_DATA(0x4e,y1); // RAM address set (horiz)
|
||
LCD_Write_COM_DATA(0x4f,x1); // RAM address set (vert)
|
||
LCD_Write_COM(0x22);
|
||
}
|
||
|
||
void TeensyDisplay::clrXY()
|
||
{
|
||
setYX(0, 0, disp_y_size, disp_x_size);
|
||
}
|
||
|
||
void TeensyDisplay::setColor(byte r, byte g, byte b)
|
||
{
|
||
fch=((r&248)|g>>5);
|
||
fcl=((g&28)<<3|b>>3);
|
||
}
|
||
|
||
void TeensyDisplay::setColor(uint16_t color)
|
||
{
|
||
fch = (uint8_t)(color >> 8);
|
||
fcl = (uint8_t)(color & 0xFF);
|
||
}
|
||
|
||
void TeensyDisplay::fillRect(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
|
||
{
|
||
if (x1>x2) {
|
||
swap(uint16_t, x1, x2);
|
||
}
|
||
if (y1 > y2) {
|
||
swap(uint16_t, y1, y2);
|
||
}
|
||
|
||
cbi(P_CS, B_CS);
|
||
setYX(x1, y1, x2, y2);
|
||
sbi(P_RS, B_RS);
|
||
_fast_fill_16(fch,fcl,((long(x2-x1)+1)*(long(y2-y1)+1)));
|
||
sbi(P_CS, B_CS);
|
||
}
|
||
|
||
void TeensyDisplay::drawPixel(uint16_t x, uint16_t y)
|
||
{
|
||
cbi(P_CS, B_CS);
|
||
setYX(x, y, x, y);
|
||
setPixel((fch<<8)|fcl);
|
||
sbi(P_CS, B_CS);
|
||
clrXY();
|
||
}
|
||
|
||
void TeensyDisplay::drawPixel(uint16_t x, uint16_t y, uint16_t color)
|
||
{
|
||
cbi(P_CS, B_CS);
|
||
setYX(x, y, x, y);
|
||
setPixel(color);
|
||
sbi(P_CS, B_CS);
|
||
clrXY();
|
||
}
|
||
|
||
void TeensyDisplay::drawPixel(uint16_t x, uint16_t y, uint8_t r, uint8_t g, uint8_t b)
|
||
{
|
||
uint16_t color16 = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3);
|
||
|
||
cbi(P_CS, B_CS);
|
||
setYX(x, y, x, y);
|
||
setPixel(color16);
|
||
sbi(P_CS, B_CS);
|
||
clrXY();
|
||
}
|
||
|
||
void TeensyDisplay::LCD_Writ_Bus(uint8_t ch, uint8_t cl)
|
||
{
|
||
*(volatile uint8_t *)(&GPIOD_PDOR) = ch;
|
||
*(volatile uint8_t *)(&GPIOC_PDOR) = cl;
|
||
pulse_low(P_WR, B_WR);
|
||
}
|
||
|
||
void TeensyDisplay::LCD_Write_COM(uint8_t VL)
|
||
{
|
||
cbi(P_RS, B_RS);
|
||
LCD_Writ_Bus(0x00, VL);
|
||
}
|
||
|
||
void TeensyDisplay::LCD_Write_DATA(uint8_t VH, uint8_t VL)
|
||
{
|
||
sbi(P_RS, B_RS);
|
||
LCD_Writ_Bus(VH,VL);
|
||
}
|
||
|
||
void TeensyDisplay::LCD_Write_DATA(uint8_t VL)
|
||
{
|
||
sbi(P_RS, B_RS);
|
||
LCD_Writ_Bus(0x00, VL);
|
||
}
|
||
|
||
void TeensyDisplay::LCD_Write_COM_DATA(uint8_t com1, uint16_t dat1)
|
||
{
|
||
LCD_Write_COM(com1);
|
||
LCD_Write_DATA(dat1>>8, dat1);
|
||
}
|
||
|
||
void TeensyDisplay::moveTo(uint16_t col, uint16_t row)
|
||
{
|
||
cbi(P_CS, B_CS);
|
||
|
||
// FIXME: eventually set drawing to the whole screen and leave it that way
|
||
|
||
// set drawing to the whole screen
|
||
// setYX(0, 0, disp_y_size, disp_x_size);
|
||
LCD_Write_COM_DATA(0x4e,row); // RAM address set (horiz)
|
||
LCD_Write_COM_DATA(0x4f,col); // RAM address set (vert)
|
||
|
||
LCD_Write_COM(0x22);
|
||
}
|
||
|
||
void TeensyDisplay::drawNextPixel(uint16_t color)
|
||
{
|
||
// Anything inside this object should call setPixel directly. This
|
||
// is primarily for the BIOS.
|
||
setPixel(color);
|
||
}
|
||
|
||
void TeensyDisplay::blit()
|
||
{
|
||
uint8_t *videoBuffer = g_vm->videoBuffer; // FIXME: poking deep
|
||
|
||
// remember these are "starts at pixel number" values, where 0 is the first.
|
||
#define HOFFSET 18
|
||
#define VOFFSET 13
|
||
|
||
// Define the horizontal area that we're going to draw in
|
||
LCD_Write_COM_DATA(0x45, HOFFSET); // offset by 20 to center it...
|
||
LCD_Write_COM_DATA(0x46, 279+HOFFSET);
|
||
|
||
// position the "write" address
|
||
LCD_Write_COM_DATA(0x4e,0+VOFFSET); // row
|
||
LCD_Write_COM_DATA(0x4f,HOFFSET); // col
|
||
|
||
// prepare the LCD to receive data bytes for its RAM
|
||
LCD_Write_COM(0x22);
|
||
|
||
// send the pixel data
|
||
sbi(P_RS, B_RS);
|
||
uint16_t pixel;
|
||
for (uint8_t y=0; y<192; y++) { // Drawing 192 of the 240 rows
|
||
pixel = y * (320/2)-1;
|
||
for (uint16_t x=0; x<280; x++) { // Drawing 280 of the 320 pixels
|
||
uint8_t colorIdx;
|
||
if (!(x & 0x01)) {
|
||
pixel++;
|
||
colorIdx = videoBuffer[pixel] >> 4;
|
||
} else {
|
||
colorIdx = videoBuffer[pixel] & 0x0F;
|
||
}
|
||
LCD_Writ_Bus(loresPixelColors[colorIdx]>>8,loresPixelColors[colorIdx]);
|
||
}
|
||
}
|
||
cbi(P_CS, B_CS);
|
||
|
||
// draw overlay, if any
|
||
if (overlayMessage[0]) {
|
||
// reset the viewport in order to draw the overlay...
|
||
LCD_Write_COM_DATA(0x45, 0);
|
||
LCD_Write_COM_DATA(0x46, 319);
|
||
|
||
drawString(M_SELECTDISABLED, 1, 240 - 16 - 12, overlayMessage);
|
||
}
|
||
}
|
||
|
||
void TeensyDisplay::drawCharacter(uint8_t mode, uint16_t x, uint8_t y, char c)
|
||
{
|
||
int8_t xsize = 8,
|
||
ysize = 0x0C,
|
||
offset = 0x20;
|
||
uint16_t temp;
|
||
|
||
c -= offset;// font starts with a space
|
||
|
||
uint16_t offPixel, onPixel;
|
||
switch (mode) {
|
||
case M_NORMAL:
|
||
onPixel = 0xFFFF;
|
||
offPixel = 0x0010;
|
||
break;
|
||
case M_SELECTED:
|
||
onPixel = 0x0000;
|
||
offPixel = 0xFFFF;
|
||
break;
|
||
case M_DISABLED:
|
||
default:
|
||
onPixel = 0x7BEF;
|
||
offPixel = 0x0000;
|
||
break;
|
||
case M_SELECTDISABLED:
|
||
onPixel = 0x7BEF;
|
||
offPixel = 0xFFE0;
|
||
break;
|
||
}
|
||
|
||
temp=(c*ysize);
|
||
for (int8_t y_off = 0; y_off <= ysize; y_off++) {
|
||
moveTo(x, y + y_off);
|
||
uint8_t ch = pgm_read_byte(&BiosFont[temp]);
|
||
for (int8_t x_off = 0; x_off <= xsize; x_off++) {
|
||
if (ch & (1 << (7-x_off))) {
|
||
setPixel(onPixel);
|
||
} else {
|
||
setPixel(offPixel);
|
||
}
|
||
}
|
||
temp++;
|
||
}
|
||
}
|
||
|
||
void TeensyDisplay::drawString(uint8_t mode, uint16_t x, uint8_t y, const char *str)
|
||
{
|
||
int8_t xsize = 8; // width of a char in this font
|
||
|
||
for (int8_t i=0; i<strlen(str); i++) {
|
||
drawCharacter(mode, x, y, str[i]);
|
||
x += xsize; // fixme: any inter-char spacing?
|
||
}
|
||
}
|
||
|
||
void TeensyDisplay::drawDriveDoor(uint8_t which, bool isOpen)
|
||
{
|
||
// location of drive door for left drive
|
||
|
||
uint16_t xoff = 55;
|
||
uint16_t yoff = 216;
|
||
|
||
// location for right drive
|
||
|
||
if (which == 1) {
|
||
xoff += 134;
|
||
}
|
||
|
||
for (int y=0; y<20; y++) {
|
||
for (int x=0; x<43; x++) {
|
||
uint8_t r, g, b;
|
||
if (isOpen) {
|
||
r = pgm_read_byte(&driveLatchOpen[(y * 43 + x)*3 + 0]);
|
||
g = pgm_read_byte(&driveLatchOpen[(y * 43 + x)*3 + 1]);
|
||
b = pgm_read_byte(&driveLatchOpen[(y * 43 + x)*3 + 2]);
|
||
} else {
|
||
r = pgm_read_byte(&driveLatch[(y * 43 + x)*3 + 0]);
|
||
g = pgm_read_byte(&driveLatch[(y * 43 + x)*3 + 1]);
|
||
b = pgm_read_byte(&driveLatch[(y * 43 + x)*3 + 2]);
|
||
}
|
||
drawPixel(x+xoff, y+yoff, r, g, b);
|
||
}
|
||
}
|
||
}
|
||
|
||
void TeensyDisplay::drawDriveStatus(uint8_t which, bool isRunning)
|
||
{
|
||
// location of status indicator for left drive
|
||
uint16_t xoff = 125;
|
||
uint16_t yoff = 213;
|
||
|
||
// and right drive
|
||
if (which == 1)
|
||
xoff += 135;
|
||
|
||
for (int y=0; y<2; y++) {
|
||
for (int x=0; x<6; x++) {
|
||
drawPixel(x + xoff, y + yoff, isRunning ? 0xF800 : 0x8AA9);
|
||
}
|
||
}
|
||
}
|
||
|
||
void TeensyDisplay::drawBatteryStatus(uint8_t percent)
|
||
{
|
||
uint16_t xoff = 300;
|
||
uint16_t yoff = 222;
|
||
|
||
// DEBUGGING: disabling this; it's drawing it a *lot*
|
||
return;
|
||
|
||
// the area around the apple is 12 wide
|
||
// it's exactly 11 high
|
||
// the color is 210/202/159
|
||
|
||
float watermark = ((float)percent / 100.0) * 11;
|
||
|
||
for (int y=0; y<11; y++) {
|
||
uint8_t bgr = 210;
|
||
uint8_t bgg = 202;
|
||
uint8_t bgb = 159;
|
||
if (11-y > watermark) {
|
||
// black...
|
||
bgr = bgg = bgb = 0;
|
||
}
|
||
|
||
for (int x=0; x<11; x++) {
|
||
uint8_t *p = &appleBitmap[(y * 10 + (x-1))*4];
|
||
// It's RGBA; blend w/ background color
|
||
|
||
uint8_t r,g,b;
|
||
float alpha = (float)pgm_read_byte(&appleBitmap[(y * 10 + (x-1))*4 + 3]) / 255.0;
|
||
|
||
r = (float)pgm_read_byte(&appleBitmap[(y * 10 + (x-1))*4 + 0])
|
||
* alpha + (bgr * (1.0 - alpha));
|
||
g = (float)pgm_read_byte(&appleBitmap[(y * 10 + (x-1))*4 + 1])
|
||
* alpha + (bgr * (1.0 - alpha));
|
||
b = (float)pgm_read_byte(&appleBitmap[(y * 10 + (x-1))*4 + 2])
|
||
* alpha + (bgr * (1.0 - alpha));
|
||
|
||
|
||
drawPixel(x+xoff, y+yoff, r, g, b);
|
||
}
|
||
}
|
||
}
|
||
|