Chroma/chroma/video/draw.c
Curle 0de541b069
Add stack unwinding to critical ISRs.
Also adjust the formatting of serial prints..
2020-11-09 18:41:34 +00:00

332 lines
11 KiB
C

#include <kernel/chroma.h>
#include <kernel/video/bitmapfont.h>
/************************
*** Team Kitty, 2020 ***
*** Chroma ***
***********************/
/* This file contains all of the draw-to-screen routines.
* It (currently; 23/08/20) handles the keyboard input test routine,
* moving the current character back and forth, up and down.
*
* It also handles filling the screen with color in the case of an event,
* and will be hooked into Vector and Shape of lainlib to eventually provide
* geometry.
*
* It will also eventually be plugged into stb_image to provide a way to draw PNGs
* and JPGs from disk.
*/
#define FONT bitfont_latin
static size_t strlen(const char* String) {
size_t Len = 0;
while(String[Len] != '\0') {
Len++;
}
return Len;
}
typedef struct {
uint32_t charHeight;
uint32_t charWidth;
uint32_t charFGColor;
uint32_t charHLColor;
uint32_t charBGColor;
uint32_t minX;
uint32_t minY;
uint32_t charScale;
size_t charPosX;
size_t charPosY;
size_t charsPerRow;
size_t rowsPerScrn;
uint32_t scrlMode;
} PRINTINFO;
PRINTINFO PrintInfo = {0};
void InitPrint() {
PrintInfo.charHeight = 8;
PrintInfo.charWidth = 8;
PrintInfo.charFGColor = 0x00FFFFFF;
PrintInfo.charHLColor = 0x00000000;
PrintInfo.charBGColor = 0x00000000;
PrintInfo.charScale = 2;
PrintInfo.charPosX = 0;
PrintInfo.charPosY = 1;
PrintInfo.scrlMode = 0;
PrintInfo.charsPerRow = bootldr.fb_width / (PrintInfo.charScale * PrintInfo.charWidth) - 5;
PrintInfo.rowsPerScrn = bootldr.fb_height / (PrintInfo.charScale * PrintInfo.charHeight);
SerialPrintf("[Print] A single character is %ux%u pixels.\r\n", PrintInfo.charScale * PrintInfo.charWidth, PrintInfo.charScale * PrintInfo.charHeight);
SerialPrintf("[Print] The screen is %ux%u, meaning you can fit %ux%u characters on screen.\r\n", bootldr.fb_width, bootldr.fb_height, PrintInfo.charsPerRow, PrintInfo.rowsPerScrn);
}
static void DrawChar(const char character, size_t x, size_t y) {
x = x + PrintInfo.charPosX * (PrintInfo.charScale * PrintInfo.charWidth);
y = y + PrintInfo.charPosY * (PrintInfo.charScale * PrintInfo.charHeight);
uint32_t Y = PrintInfo.charWidth >> 3, X = 0;
if((PrintInfo.charWidth & 0x7) != 0) {
Y++;
}
for(uint32_t Row = 0; Row < PrintInfo.charHeight; Row++) {
for(uint32_t Bit = 0; Bit < PrintInfo.charWidth; Bit++) {
if ( ((Bit & 0x7) == 0) && (Bit > 0)) {
X++;
}
// This one is crazy. Stick with me.
if((FONT[(int)character][Row * Y + X] >> (Bit & 0x7)) & 1) { // Check the bit in the bitmap, if it's solid..
for(uint32_t ScaleY = 0; ScaleY < PrintInfo.charScale; ScaleY++) { // Take care of the scale height
for(uint32_t ScaleX = 0; ScaleX < PrintInfo.charScale; ScaleX++) { // And the scale width
size_t offset = ((y * bootldr.fb_width + x) + // Calculate the offset from the framebuffer
PrintInfo.charScale * (Row * bootldr.fb_width + Bit) + // With the appropriate scale
(ScaleY * bootldr.fb_width + ScaleX) + // In X and Y
PrintInfo.charScale * 1 * PrintInfo.charWidth) - 10; // With some offset to start at 0
*(uint32_t* )(&fb + offset * 4) // And use it to set the correct pixel on the screen
= PrintInfo.charFGColor; // In the set foreground color
}
}
} else {
// We need to draw the pixel transparently, using the background color
for(uint32_t ScaleY = 0; ScaleY < PrintInfo.charScale; ScaleY++) {
for(uint32_t ScaleX = 0; ScaleX < PrintInfo.charScale; ScaleX++) {
if(PrintInfo.charHLColor != 0xFF000000) {
size_t offset = ((y * bootldr.fb_width + x) +
PrintInfo.charScale * (Row * bootldr.fb_width + Bit) +
(ScaleY * bootldr.fb_width + ScaleX) +
PrintInfo.charScale * 1 * PrintInfo.charWidth) - 10;
if( y == 0 && x == 0){
//SerialPrintf("Writing first pixel at %x\r\n", offset);
}
*(uint32_t*)(&fb + offset *4)
= PrintInfo.charHLColor;
}
}
}
}
}
}
/*
uint32_t Y = PrintInfo.charWidth >> 3, X = 0;
if((PrintInfo.charWidth & 0x7) != 0) {
Y++;
}
for(size_t CharRow = 0; CharRow < PrintInfo.charHeight; CharRow++) {
for(size_t CharPixel = 0; CharPixel < PrintInfo.charWidth; CharPixel++) {
if( CharPixel && (CharPixel & 0x7) == 0) {
X++;
}
for(size_t ScaleX = 0; ScaleX < PrintInfo.charScale; ScaleX++) {
for(size_t ScaleY = 0; ScaleY < PrintInfo.charScale; ScaleY++) {
if(FONT[character][CharRow * Y + X] >> (CharRow & 0x7) & 1) {
size_t offset = (y * bootldr.fb_width + x) +
(PrintInfo.charScale * (CharRow * bootldr.fb_width + CharPixel)) +
(ScaleY * (bootldr.fb_width + ScaleX));
*((uint32_t*) (&fb + offset * 4))
= PrintInfo.charFGColor;
//DrawPixel(x * PrintInfo.charWidth + X, Y + y + PrintInfo.charHeight, 0x00FF0000);
}
}
}
}
}
uint32_t Y = PrintInfo.charWidth >> 3, X = 0;
if((PrintInfo.charWidth & 0x7) != 0) {
Y++;
}
for(uint32_t Row = 0; Row < PrintInfo.charHeight; Row++) {
for(uint32_t Bit = 0; Bit < PrintInfo.charWidth; Bit++) {
if( ((Bit & 0x7) == 0) && (Bit > 0))
X++;
for(uint32_t ScaleY = 0; ScaleY < PrintInfo.charScale; ScaleY++) {
for(uint32_t ScaleX = 0; ScaleX < PrintInfo.charScale; ScaleX++) {
if((FONT[character][Row * Y + X] >> (Bit & 0x7)) & 1) {
size_t offset = (y * bootldr.fb_width + x) +
(PrintInfo.charScale * (Row * bootldr.fb_width + Bit)) +
(ScaleY * (bootldr.fb_width + ScaleX));
SerialPrintf("Drawing pixel at offset %x, at y %d, x %d, row %d, bit %d with scaley %d and scalex %d. charScale %d and charWidth %d, making a charLength %d.\r\n", offset, y, x, Row, Bit, ScaleX, ScaleY, PrintInfo.charScale, PrintInfo.charWidth, PrintInfo.charScale * PrintInfo.charWidth);
*((uint32_t*) (&fb + offset * 4))
= PrintInfo.charFGColor;
} else {
if(PrintInfo.charHLColor != 0xFF000000) {
size_t offset = (y * bootldr.fb_width + x) +
(PrintInfo.charScale * (Row * bootldr.fb_width + Bit)) +
(ScaleY * (bootldr.fb_width + ScaleX));
SerialPrintf("Drawing pixel at offset %x\r\n", offset);
*((uint32_t*) (&fb + offset * 4))
= PrintInfo.charHLColor;
}
}
}
}
}
}
*/
}
void DrawPixel(uint32_t x, uint32_t y, uint32_t color) {
if(x > bootldr.fb_width) {
DrawPixel(x - bootldr.fb_width, y + (PrintInfo.charHeight * PrintInfo.charScale), color);
//FillScreen(color);
} else if(y > bootldr.fb_height) {
DrawPixel(x, y - bootldr.fb_height, color);
} else {
*((uint32_t*) (&fb + (y * bootldr.fb_width + x) * 4)) = color;
//SerialPrintf("Drawing a pixel at %d, %d with color 0x%x\r\n", x, y, color);
}
}
void FillScreen(uint32_t color) {
for(size_t y = 0; y < bootldr.fb_height; y++) {
for(size_t x = 0; x < bootldr.fb_width; x++) {
DrawPixel(x, y, color);
}
}
}
static void ProgressCursorS(size_t Steps) {
if(PrintInfo.charPosX + Steps > PrintInfo.charsPerRow) {
PrintInfo.charPosX = 0;
size_t Rows = Steps / PrintInfo.charsPerRow;
if(PrintInfo.charPosY + Rows > PrintInfo.rowsPerScrn) {
size_t RowsLeft = PrintInfo.rowsPerScrn - PrintInfo.charPosY;
ProgressCursorS((Rows - RowsLeft) * PrintInfo.charsPerRow);
} else {
PrintInfo.charPosY++;
}
} else {
PrintInfo.charPosX += Steps;
}
}
static void Newline() {
ProgressCursorS(PrintInfo.charsPerRow);
}
static void ProgressCursor() {
ProgressCursorS(1);
}
static void Backspace() {
SerialPrintf("Backspacing from %d to %d\r\n", PrintInfo.charPosX, PrintInfo.charPosX - 1);
if(PrintInfo.charPosX - 1 <= 0) {
if(PrintInfo.charPosY - 1 <= 0) {
PrintInfo.charPosY = 0;
} else {
PrintInfo.charPosY--;
}
PrintInfo.charPosX = 0;
} else {
PrintInfo.charPosX -= 1;
}
}
void WriteChar(const char character) {
//size_t y = PrintInfo.charPos / RowsWidth * (PrintInfo.charScale * PrintInfo.charHeight);
//size_t x = (PrintInfo.charPos % RowsWidth) * (PrintInfo.charScale * PrintInfo.charWidth);
switch(character) {
case '\b':
Backspace();
DrawChar((char) 32, PrintInfo.charPosX, PrintInfo.charPosY);
break;
case '\n':
Newline();
break;
case '\t':
ProgressCursorS(4);
break;
default:
DrawChar(character, PrintInfo.charPosX, PrintInfo.charPosY);
ProgressCursor();
break;
}
}
void WriteString(const char* string) {
for(unsigned int i = 0; i < strlen(string); i++) {
WriteChar(string[i]);
}
}
void WriteStringWithFont(const char *inChar)
{
psf_t *font = (psf_t*) &_binary_font_psf_start;
unsigned int drawX, drawY, kx = 0, fontLine, bitMask, offset;
const unsigned int bytesPerLine = ( font -> glyphWidth + 7 ) / 8;
while(*inChar) {
unsigned char *glyph =
(unsigned char*) &_binary_font_psf_start
+ font->headerSize
+ (*inChar > 0 && *inChar < (int)font->numGlyphs ? *inChar : 0) *
font->glyphSize;
offset = (kx * (font->glyphWidth + 1) * 4);
for( drawY = 0; drawY < font->glyphHeight ; drawY++) {
fontLine = offset;
bitMask = 1 << (font->glyphWidth - 1);
for( drawX = 0; drawX < font->glyphWidth; drawX++) {
*((uint32_t*)((uint64_t) &fb + fontLine)) =
((int) *glyph) & (bitMask) ? 0xFFFFFF : 0;
bitMask >>= 1;
fontLine += 4;
}
*((uint32_t*)((uint64_t) &fb + fontLine)) = 0;
glyph += bytesPerLine;
offset += bootldr.fb_scanline;
}
inChar++; kx++;
}
}