mirror of
https://github.com/JorjBauer/aiie.git
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279 lines
7.9 KiB
C++
279 lines
7.9 KiB
C++
#include <ctype.h> // isgraph
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#include <linux/fb.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include "fb-display.h"
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#include "bios-font.h"
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#include "images.h"
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#include "globals.h"
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#include "applevm.h"
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#include "apple/appleui.h"
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#define SCREENINSET_X (18*2)
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#define SCREENINSET_Y (13*2)
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// RGB map of each of the lowres colors
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const uint16_t loresPixelColors[16] = { 0x0000, // 0 black
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0xC006, // 1 magenta
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0x0010, // 2 dark blue
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0xA1B5, // 3 purple
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0x0480, // 4 dark green
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0x6B4D, // 5 dark grey
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0x1B9F, // 6 med blue
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0x0DFD, // 7 light blue
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0x92A5, // 8 brown
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0xF8C5, // 9 orange
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0x9555, // 10 light gray
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0xFCF2, // 11 pink
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0x07E0, // 12 green
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0xFFE0, // 13 yellow
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0x87F0, // 14 aqua
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0xFFFF // 15 white
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};
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FBDisplay::FBDisplay()
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{
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memset((void *)videoBuffer, 0, sizeof(videoBuffer));
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fb_fd = open("/dev/fb0",O_RDWR);
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//Get variable screen information
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ioctl(fb_fd, FBIOGET_VSCREENINFO, &vinfo);
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printf("bpp: %d\n", vinfo.bits_per_pixel);
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//Get fixed screen information
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ioctl(fb_fd, FBIOGET_FSCREENINFO, &finfo);
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// This shouldn't be necessary, but I'm not seeing FBIOPUT working yet
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system("fbset -xres 640 -yres 480 -depth 16");
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// request what we want, rather than hoping we got it
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vinfo.width = 640;
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vinfo.height = 480;
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vinfo.bits_per_pixel = 16;
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int ret = ioctl(fb_fd, FBIOPUT_VSCREENINFO, &vinfo);
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printf("Return from FBIOPUT_VSCREENINFO: %d\n", ret);
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ret = ioctl(fb_fd, FBIOGET_VSCREENINFO, &vinfo);
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printf("Return from FBIOGET_VSCREENINFO: %d\n", ret);
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printf("Screen is %d x %d @ %d\n", vinfo.width, vinfo.height, vinfo.bits_per_pixel);
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screensize = vinfo.yres_virtual * finfo.line_length;
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fbp = (uint8_t *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, fb_fd, (off_t)0);
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}
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FBDisplay::~FBDisplay()
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{
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}
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void FBDisplay::redraw()
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{
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// primarily for the device, where it's in and out of the
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// bios. Draws the background image.
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g_ui->drawStaticUIElement(UIeOverlay);
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if (g_vm && g_ui) {
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// determine whether or not a disk is inserted & redraw each drive
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g_ui->drawOnOffUIElement(UIeDisk1_state, ((AppleVM *)g_vm)->DiskName(0)[0] == '\0');
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g_ui->drawOnOffUIElement(UIeDisk2_state, ((AppleVM *)g_vm)->DiskName(1)[0] == '\0');
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}
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}
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// drawImageOfSizeAt will horizontally scale out the image b/c the
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// images themselves aren't aware of the double resolution. This is an
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// inconsistency that probably should be addressed. FIXME?
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void FBDisplay::drawImageOfSizeAt(const uint8_t *img,
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uint16_t sizex, uint8_t sizey,
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uint16_t wherex, uint8_t wherey)
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{
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for (uint8_t y=0; y<sizey; y++) {
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for (uint16_t x=0; x<sizex; x++) {
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const uint8_t *p = &img[(y * sizex + x)*3];
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drawPixel((x+wherex)*2, y+wherey, p[0], p[1], p[2]);
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drawPixel((x+wherex)*2+1, y+wherey, p[0], p[1], p[2]);
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}
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}
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}
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void FBDisplay::blit(AiieRect r)
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{
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for (uint16_t y=r.top*2; y<r.bottom*2; y++) {
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for (uint16_t x=r.left*2; x<r.right*2; x++) {
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uint8_t colorIdx = videoBuffer[y*FBDISPLAY_WIDTH+x];
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uint16_t color;
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color = loresPixelColors[colorIdx];
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if (g_displayType == m_monochrome) {
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// Tricky. Grayscale from luminance. Turn each value into a
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// 5-bit value, so they have equal weights; then calculate
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// luminance; then turn that back in to 5/6/5.
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float fv = (0.2125 * ((color & 0xF800) >> 11));
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fv += (0.7154 * ((color & 0x07E0) >> 6)); // 6 bits of green
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// turned in to 5
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// bits
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fv += (0.0721 * ((color & 0x001F)));
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color = ((uint16_t)fv << 6);
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}
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else if (g_displayType == m_blackAndWhite) {
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// Tricky. Grayscale from luminance. Turn each value into a
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// 5-bit value, so they have equal weights; then calculate
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// luminance; then turn that back in to 5/6/5.
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float fv = (0.2125 * ((color & 0xF800) >> 11));
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fv += (0.7154 * ((color & 0x07E0) >> 6)); // 6 bits of green
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// turned in to 5
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// bits
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fv += (0.0721 * ((color & 0x001F)));
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color = ((uint16_t)fv << 11) | ((uint16_t)fv << 6) | ((uint16_t)fv);
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}
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long location = (x+vinfo.xoffset+SCREENINSET_X) * (vinfo.bits_per_pixel/8) + (y+vinfo.yoffset+SCREENINSET_Y) * finfo.line_length;
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*((uint16_t*)(fbp + location)) = color;
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}
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}
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if (overlayMessage[0]) {
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drawString(M_SELECTDISABLED, 1, 240 - 16 - 12, overlayMessage);
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}
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}
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inline uint16_t _888to565(uint8_t r, uint8_t g, uint8_t b)
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{
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return ( (r & 0xF8) << 8 |
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( (g & 0xFC) << 3) |
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( (b & 0xF8) >> 3 ) );
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}
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void FBDisplay::drawUIPixel(uint16_t x, uint16_t y, uint16_t color)
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{
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drawPixel(x*2, y, color);
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drawPixel(x*2+1, y, color);
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}
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// external method. Doubles vertically.
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void FBDisplay::drawPixel(uint16_t x, uint16_t y, uint16_t color)
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{
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long location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + (y*2+vinfo.yoffset) * finfo.line_length;
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*((uint16_t*)(fbp + location)) = color;
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location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + (y*2+1+vinfo.yoffset) * finfo.line_length;
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*((uint16_t*)(fbp + location)) = color;
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}
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// external method. Doubles vertically.
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void FBDisplay::drawPixel(uint16_t x, uint16_t y, uint8_t r, uint8_t g, uint8_t b)
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{
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long location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + (y*2+vinfo.yoffset) * finfo.line_length;
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*((uint16_t*)(fbp + location)) = _888to565(r,g,b);
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location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) + (y*2+1+vinfo.yoffset) * finfo.line_length;
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*((uint16_t*)(fbp + location)) = _888to565(r,g,b);
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}
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void FBDisplay::drawCharacter(uint8_t mode, uint16_t x, uint8_t y, char c)
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{
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int8_t xsize = 8,
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ysize = 0x0C,
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offset = 0x20;
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uint16_t temp;
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c -= offset;// font starts with a space
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uint16_t offPixel, onPixel;
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switch (mode) {
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case M_NORMAL:
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onPixel = 0xFFFF;
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offPixel = 0x0010;
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break;
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case M_SELECTED:
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onPixel = 0x0000;
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offPixel = 0xFFFF;
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break;
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case M_DISABLED:
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default:
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onPixel = 0x7BEF;
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offPixel = 0x0000;
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break;
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case M_SELECTDISABLED:
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onPixel = 0x7BEF;
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offPixel = 0xFFE0;
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break;
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}
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temp=(c*ysize);
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for (int8_t y_off = 0; y_off <= ysize; y_off++) {
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uint8_t ch = BiosFont[temp];
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for (int8_t x_off = 0; x_off <= xsize; x_off++) {
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if (ch & (1 << (7-x_off))) {
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drawPixel(x + x_off, y + y_off, onPixel);
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} else {
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drawPixel(x + x_off, y + y_off, offPixel);
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}
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}
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temp++;
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}
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}
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void FBDisplay::drawString(uint8_t mode, uint16_t x, uint8_t y, const char *str)
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{
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int8_t xsize = 8; // width of a char in this font
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for (int8_t i=0; i<strlen(str); i++) {
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drawCharacter(mode, x, y, str[i]);
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x += xsize; // fixme: any inter-char spacing?
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}
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}
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void FBDisplay::flush()
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{
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}
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void FBDisplay::clrScr()
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{
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for (uint8_t y=0; y<vinfo.height/2; y++) { // /2 because drawPixel doubles vertically
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for (uint16_t x=0; x<vinfo.width; x++) {
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drawPixel(x, y, 0x0000);
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}
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}
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}
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// All of these double vertically b/c we're 480, but the original is 240
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void FBDisplay::cachePixel(uint16_t x, uint16_t y, uint8_t color)
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{
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videoBuffer[y*2*FBDISPLAY_WIDTH+x] = color;
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videoBuffer[((y*2)+1)*FBDISPLAY_WIDTH+x] = color;
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}
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// "DoubleWide" means "please double the X because I'm in low-res width mode"
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void FBDisplay::cacheDoubleWidePixel(uint16_t x, uint16_t y, uint8_t color)
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{
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videoBuffer[y*2*FBDISPLAY_WIDTH+x*2] = color;
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videoBuffer[y*2*FBDISPLAY_WIDTH+x*2+1] = color;
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videoBuffer[(y*2+1)*FBDISPLAY_WIDTH+x*2] = color;
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videoBuffer[(y*2+1)*FBDISPLAY_WIDTH+x*2+1] = color;
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}
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void FBDisplay::cache2DoubleWidePixels(uint16_t x, uint16_t y, uint8_t colorB, uint8_t colorA)
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{
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videoBuffer[y*2*FBDISPLAY_WIDTH+x*2] = colorA;
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videoBuffer[y*2*FBDISPLAY_WIDTH+x*2+1] = colorA;
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videoBuffer[y*2*FBDISPLAY_WIDTH+x*2+2] = colorB;
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videoBuffer[y*2*FBDISPLAY_WIDTH+x*2+3] = colorB;
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videoBuffer[(y*2+1)*FBDISPLAY_WIDTH+x*2] = colorA;
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videoBuffer[(y*2+1)*FBDISPLAY_WIDTH+x*2+1] = colorA;
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videoBuffer[(y*2+1)*FBDISPLAY_WIDTH+x*2+2] = colorB;
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videoBuffer[(y*2+1)*FBDISPLAY_WIDTH+x*2+3] = colorB;
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}
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