From 0254dd78e5e829ec2257aa06fa9605f9c4db8188 Mon Sep 17 00:00:00 2001
From: AAC A <aac@a.com>
Date: Fri, 14 Apr 2023 08:32:56 +0200
Subject: [PATCH] i2c_oled prototype fontsize
---
examples/i2c_oled/i2c_oled.c | 11 +++-
examples/i2c_oled/oled.h | 105 +++++++++++++++++++++++++++++++++++
2 files changed, 114 insertions(+), 2 deletions(-)
diff --git a/examples/i2c_oled/i2c_oled.c b/examples/i2c_oled/i2c_oled.c
index 8181ea9..df6c8de 100644
--- a/examples/i2c_oled/i2c_oled.c
+++ b/examples/i2c_oled/i2c_oled.c
@@ -31,7 +31,7 @@ int main()
printf("Looping on test modes...");
while(1)
{
- for(uint8_t mode=0;mode<5;mode++)
+ for(uint8_t mode=0;mode<6;mode++)
{
// clear buffer for next mode
oled_setbuf(0);
@@ -79,7 +79,14 @@ int main()
oled_xorrect(64, 0, 64, 32);
break;
-
+ case 5:
+ oled_drawstr_sz(0,0, "Size 8x8", 1, fontsize_8x8);
+ oled_drawstr_sz(0,16, "Size 16x16", 1, fontsize_16x16);
+ Delay_Ms(1000);
+ oled_refresh();
+ oled_drawstr_sz(0,0, "Size 32x32", 1, fontsize_32x32);
+ break;
+
default:
break;
}
diff --git a/examples/i2c_oled/oled.h b/examples/i2c_oled/oled.h
index 61298a4..c2edafa 100644
--- a/examples/i2c_oled/oled.h
+++ b/examples/i2c_oled/oled.h
@@ -483,6 +483,111 @@ void oled_drawstr(uint8_t x, uint8_t y, char *str, uint8_t color)
}
}
+/*
+ * Draw character to the display buffer, scaled to size
+ */
+
+typedef enum {
+ fontsize_8x8 = 1,
+ fontsize_16x16 = 2,
+ fontsize_32x32 = 4
+} font_size_t;
+/*
+void oled_drawchar_sz(uint8_t x, uint8_t y, uint8_t chr, uint8_t color, font_size_t font_size)
+{
+ uint16_t i, j, col;
+ uint8_t d;
+
+ uint8_t font_scale = (uint8_t)font_size;
+
+ for (i = 0; i < 8; i++)
+ {
+ d = fontdata[(chr << 3) + i];
+ for (j = 0; j < 8; j++)
+ {
+ if (d & 0x80)
+ col = color;
+ else
+ col = (~color) & 1;
+
+ oled_drawPixel(x + (j * font_scale), y + (i * font_scale), col);
+
+ // Draw pixel at 2x larger size
+ if (font_scale > 1) {
+ oled_drawPixel(x + (j * font_scale) + 1, y + (i * font_scale), col);
+ oled_drawPixel(x + (j * font_scale), y + (i * font_scale) + 1, col);
+ oled_drawPixel(x + (j * font_scale) + 1, y + (i * font_scale) + 1, col);
+ }
+
+ // Draw pixel at 4x larger size
+ if (font_scale > 2) {
+ oled_drawPixel(x + (j * font_scale) + 2, y + (i * font_scale), col);
+ oled_drawPixel(x + (j * font_scale), y + (i * font_scale) + 2, col);
+ oled_drawPixel(x + (j * font_scale) + 2, y + (i * font_scale) + 2, col);
+
+ oled_drawPixel(x + (j * font_scale) + 1, y + (i * font_scale) + 2, col);
+ oled_drawPixel(x + (j * font_scale) + 2, y + (i * font_scale) + 1, col);
+ }
+
+ // next bit
+ d <<= 1;
+ }
+ }
+}
+*/
+
+void oled_drawchar_sz(uint8_t x, uint8_t y, uint8_t chr, uint8_t color, font_size_t font_size)
+{
+ uint16_t i, j, col;
+ uint8_t d;
+
+ // Determine the font scale factor based on the font_size parameter
+ uint8_t font_scale = (uint8_t)font_size;
+
+ // Loop through each row of the font data
+ for (i = 0; i < 8; i++)
+ {
+ // Retrieve the font data for the current row
+ d = fontdata[(chr << 3) + i];
+
+ // Loop through each column of the font data
+ for (j = 0; j < 8; j++)
+ {
+ // Determine the color to draw based on the current bit in the font data
+ if (d & 0x80)
+ col = color;
+ else
+ col = (~color) & 1;
+
+ // Draw the pixel at the original size and scaled size using nested for-loops
+ for (uint8_t k = 0; k < font_scale; k++) {
+ for (uint8_t l = 0; l < font_scale; l++) {
+ oled_drawPixel(x + (j * font_scale) + k, y + (i * font_scale) + l, col);
+ }
+ }
+
+ // Move to the next bit in the font data
+ d <<= 1;
+ }
+ }
+}
+
+/*
+ * draw a string to the display buffer, scaled to size
+ */
+void oled_drawstr_sz(uint8_t x, uint8_t y, char *str, uint8_t color, font_size_t font_size)
+{
+ uint8_t c;
+
+ while((c=*str++))
+ {
+ oled_drawchar_sz(x, y, c, color, font_size);
+ x += 8 * font_size;
+ if(x>128 - 8 * font_size)
+ break;
+ }
+}
+
/*
* initialize I2C and OLED
*/
--
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