47 righe
991 B
C
47 righe
991 B
C
#include "font.h"
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#include "odroid/display.h"
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#include "text.h"
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static const int MAX_GLYPHS_PER_ROW = LCD_WIDTH / GLYPH_WIDTH;
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static const int MAX_GLYPHS_PER_COL = LCD_HEIGHT / GLYPH_HEIGHT;
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void DrawText(uint16_t* framebuffer, char* string, int length, int x, int y, uint16_t color)
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{
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assert(x + length <= MAX_GLYPHS_PER_ROW);
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assert(y <= MAX_GLYPHS_PER_COL);
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for (int charIndex = 0; charIndex < length; ++charIndex)
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{
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char c = string[charIndex];
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if (c == ' ')
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{
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continue;
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}
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int xStart = GLYPH_WIDTH * (x + charIndex);
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int yStart = GLYPH_HEIGHT * y;
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for (int row = 0; row < GLYPH_HEIGHT; ++row)
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{
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for (int col = 0; col < GLYPH_WIDTH; ++col)
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{
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int bitPosition = 1U << (15U - col);
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int glyphIndex = GetGlyphIndex(c);
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uint16_t pixel = glyphMap[glyphIndex][row] & bitPosition;
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if (pixel)
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{
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int screenX = xStart + col;
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int screenY = yStart + row;
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framebuffer[screenY * LCD_WIDTH + screenX] = color;
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}
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}
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}
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}
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}
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