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https://github.com/ByteWelder/Tactility.git
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86010186d8
app-module: - Implement `AppStartContext` to reduce amount of `app_start_` and `app_exec` functions: replace them with `app_start_with_context()` - Add support for environment variables when starting apps - Implement support for environment variables for apps graphics-module: - Add this new module - Move font-module code into this module - Implement pixel_buffer apps: - Terminal app: reduce memory usage by only buffering a single row of characters, and try to buffer in IRAM when possible. Implement new pixel_buffer. - App List: Mark apps as favourite to pin them on top. Use touch or press "x" key. - App List: Add toolbar button that shows alert dialog with info about using favourites
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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#include <font/render.h>
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#include <font/font.h>
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#include <graphics/pixel_buffer.h>
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extern "C" {
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void font_render_char_pixel_buffer_rgb565(
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PixelBuffer* buffer,
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int x,
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int y,
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const FixedWidthFont* font,
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char character,
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uint16_t fg,
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uint16_t bg,
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PixelBufferConversion conversion
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) {
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const auto raw = static_cast<unsigned char>(character);
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const unsigned char glyphChar = (raw >= font->first_codepoint && raw <= font->last_codepoint) ? raw : ' ';
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const uint8_t* glyph = &font->glyph_bitmap[(glyphChar - font->first_codepoint) * font->glyph_height * font->glyph_bytes_per_row];
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for (int row = 0; row < font->glyph_height; row++) {
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const uint8_t* bits = &glyph[row * font->glyph_bytes_per_row];
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for (int col = 0; col < font->glyph_width; col++) {
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// The font stores the leftmost pixel of each row byte in the most significant bit.
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const bool covered = (bits[col / 8] & (0x80U >> (col % 8))) != 0;
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pixel_buffer_set_pixel_rgb565(buffer, x + col, y + row, covered ? fg : bg, conversion);
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}
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}
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}
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}
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