Port upstream rendering optimizations and MemAvailable fix#4
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Buffer character pixels in memory and use burst I2C transfer instead of pushing one pixel at a time. Use a stack buffer (832 bytes max) instead of malloc/free per character. Remove redundant SYNC_REG call from lcd_write_string. Fix off-by-one clipping in lcd_fill_rectangle and wrong dimension calculation in lcd_draw_image. Adapted from UCTRONICS#27 with endianness fix (the original PR stores native uint16_t values but i2c_burst_transfer expects big-endian byte order) and stack buffer simplification. Co-authored-by: slyglif <10196904+slyglif@users.noreply.github.com>
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MemAvailable includes reclaimable cache and buffers, giving a more accurate picture of actually available memory. Adapted from UCTRONICS#17 Co-authored-by: mobejm <4407468+mobejm@users.noreply.github.com>
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Summary
lcd_fill_rectangle, fix wrong dimension calc inlcd_draw_imageMemAvailableinstead ofMemFreefor RAM reporting — includes reclaimable cache/buffers for accurate available memoryTest plan
make clean && makebuilds without warnings🤖 Generated with Claude Code