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add scaling modes

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This commit is contained in:
Tobias Gunkel
2025-08-11 21:27:36 +02:00
parent 5302f017f2
commit 0c0bc03e48
5 changed files with 210 additions and 121 deletions
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src/lcd_core.cpp
+60 -14
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@@ -16,16 +16,17 @@ static uint8_t pixels_buffer[LCD_WIDTH];
palette_t palette; // Colour palette
volatile ScalingMode scalingMode = ScalingMode::NORMAL;
static int lcd_line_busy = 0;
#define IS_LINE_REPEATED(line) ((line % 2) || (line % 6 == 0))
// #define IS_LINE_REPEATED(line) 0
#define IS_REPEATED(pos) ((pos % 2) || (pos % 6 == 0))
static void calcExtraLineTable() {
uint8_t offset = 0;
for (uint8_t line = 0; line < LCD_HEIGHT; ++line) {
scaledLineOffsetTable[line] = offset;
offset += 1 + IS_LINE_REPEATED(line);
offset += 1 + IS_REPEATED(line);
}
}
@@ -54,21 +55,66 @@ void lcd_draw_line(struct gb_s* gb, const uint8_t pixels[LCD_WIDTH],
multicore_fifo_push_blocking(cmd.full);
}
void lcd_write_pixels(const uint16_t* pixels, uint8_t line, uint_fast16_t nmemb) {
void lcd_write_pixels_normal(const uint16_t* pixels, uint8_t line, uint_fast16_t nmemb) {
const uint16_t colOffset = (tft.width() - nmemb) / 2;
const uint16_t lineOffset = (tft.height() - LCD_HEIGHT) / 2;
tft.setAddrWindow(colOffset, lineOffset + line, nmemb, 1);
tft.pushColors((uint16_t*) pixels, nmemb, true);
}
void lcd_write_pixels_stretched(const uint16_t* pixels, uint8_t line, uint_fast16_t nmemb) {
static uint16_t doubledPixels[320];
uint16_t pos = 0;
for (int i = 0; i < nmemb; ++i) {
doubledPixels[pos++] = pixels[i];
doubledPixels[pos++] = pixels[i];
for (int col = 0; col < nmemb; ++col) {
doubledPixels[pos++] = pixels[col];
doubledPixels[pos++] = pixels[col];
}
const uint16_t stretchedWidth = pos;
uint8_t repeatedLines = IS_LINE_REPEATED(line);
// tft.setAddrWindow(0, scaledLineOffsetTable[line], nmemb * 2, 1 + repeatedLines);
tft.setAddrWindow(0, scaledLineOffsetTable[line], nmemb * 2, 1);
tft.pushColors((uint16_t*)doubledPixels, nmemb * 2, true);
uint8_t repeatedLines = IS_REPEATED(line);
tft.setAddrWindow(0, scaledLineOffsetTable[line], stretchedWidth, 1);
tft.pushColors((uint16_t*)doubledPixels, stretchedWidth, true);
if (repeatedLines) {
tft.setAddrWindow(0, scaledLineOffsetTable[line] + 1, nmemb * 2, 1);
tft.pushColors((uint16_t*)doubledPixels, nmemb * 2, true);
tft.setAddrWindow(0, scaledLineOffsetTable[line] + 1, stretchedWidth, 1);
tft.pushColors((uint16_t*)doubledPixels, stretchedWidth, true);
}
}
void lcd_write_pixels_stretched_keep_aspect(const uint16_t* pixels, uint8_t line, uint_fast16_t nmemb) {
static uint16_t doubledPixels[320];
uint16_t pos = 0;
for (int col = 0; col < nmemb; ++col) {
doubledPixels[pos++] = pixels[col];
if (IS_REPEATED(col)) {
doubledPixels[pos++] = pixels[col];
}
}
const uint16_t stretchedWidth = pos;
const uint16_t colOffset = (tft.width() - stretchedWidth) / 2;
uint8_t repeatedLines = IS_REPEATED(line);
tft.setAddrWindow(colOffset, scaledLineOffsetTable[line], stretchedWidth, 1);
tft.pushColors((uint16_t*)doubledPixels, stretchedWidth, true);
if (repeatedLines) {
tft.setAddrWindow(colOffset, scaledLineOffsetTable[line] + 1, stretchedWidth, 1);
tft.pushColors((uint16_t*)doubledPixels, stretchedWidth, true);
}
}
void lcd_write_pixels(const uint16_t* pixels, uint8_t line, uint_fast16_t nmemb) {
switch (scalingMode)
{
case ScalingMode::STRETCH:
lcd_write_pixels_stretched(pixels, line, nmemb);
break;
case ScalingMode::STRETCH_KEEP_ASPECT:
lcd_write_pixels_stretched_keep_aspect(pixels, line, nmemb);
break;
case ScalingMode::NORMAL:
default:
lcd_write_pixels_normal(pixels, line, nmemb);
break;
}
}
@@ -112,7 +158,7 @@ void core1DispatchLoop() {
break;
case CORE_CMD_IDLE_SET:
lcd_display_control(true, cmd.data);
lcd_fill(TFT_BLACK);
break;
case CORE_CMD_NOP: