From 0c25d275f15d01b32c00ab2c5992a3792f92f7bd Mon Sep 17 00:00:00 2001 From: Karol Bieniaszewski Date: Sat, 27 Jan 2018 15:39:04 +0100 Subject: [PATCH] Simple font size scaling for framebuf I have implemented simple font size scaling as `framebuf_text_scaled` usage from python size x 4 `framebuf.text_scaled('Ab', 0, 26, 4)` also posted to official micropython as https://github.com/micropython/micropython/pull/3583 --- extmod/modframebuf.c | 53 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/extmod/modframebuf.c b/extmod/modframebuf.c index 792a3a7fa2..2bd81bf29b 100644 --- a/extmod/modframebuf.c +++ b/extmod/modframebuf.c @@ -494,6 +494,58 @@ STATIC mp_obj_t framebuf_text(size_t n_args, const mp_obj_t *args) { } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(framebuf_text_obj, 4, 5, framebuf_text); +STATIC mp_obj_t framebuf_text_scaled(size_t n_args, const mp_obj_t *args) { + // extract arguments + mp_obj_framebuf_t *self = MP_OBJ_TO_PTR(args[0]); + const char *str = mp_obj_str_get_str(args[1]); + mp_int_t x0 = mp_obj_get_int(args[2]); + mp_int_t y0 = mp_obj_get_int(args[3]); + + mp_int_t scale = 1; + if (n_args >= 5) { + scale = mp_obj_get_int(args[4]); + } + + mp_int_t col = 1; + if (n_args >= 6) { + col = mp_obj_get_int(args[5]); + } + + // loop over chars + for (; *str; ++str) { + // get char and make sure its in range of font + int chr = *(uint8_t*)str; + if (chr < 32 || chr > 127) { + chr = 127; + } + // get char data + const uint8_t *chr_data = &font_petme128_8x8[(chr - 32) * 8]; + // loop over char data + mp_int_t xs = 0; + mp_int_t ys = 0; + for (int j = 0; j < 8; j++, x0+=scale) { + uint vline_data = chr_data[j]; // each byte is a column of 8 pixels, LSB at top + for (int y = y0; vline_data; vline_data >>= 1, y+=scale) { // scan over vertical column + if (vline_data & 1) { // only draw if pixel set + for (int sx=0; sx < scale; sx++) { + xs=x0 + sx; + if (0 <= xs && xs < self->width) { // clip x + for(int sy=0; sy < scale; sy++) { + ys=y+sy; + if (0 <= ys && ys < self->height) { // clip y + setpixel(self, xs, ys, col); + } + } + } + } + } + } + } + } + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(framebuf_text_scaled_obj, 5, 6, framebuf_text_scaled); + STATIC const mp_rom_map_elem_t framebuf_locals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR_fill), MP_ROM_PTR(&framebuf_fill_obj) }, { MP_ROM_QSTR(MP_QSTR_fill_rect), MP_ROM_PTR(&framebuf_fill_rect_obj) }, @@ -505,6 +557,7 @@ STATIC const mp_rom_map_elem_t framebuf_locals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR_blit), MP_ROM_PTR(&framebuf_blit_obj) }, { MP_ROM_QSTR(MP_QSTR_scroll), MP_ROM_PTR(&framebuf_scroll_obj) }, { MP_ROM_QSTR(MP_QSTR_text), MP_ROM_PTR(&framebuf_text_obj) }, + { MP_ROM_QSTR(MP_QSTR_text_scaled), MP_ROM_PTR(&framebuf_text_scaled_obj) }, }; STATIC MP_DEFINE_CONST_DICT(framebuf_locals_dict, framebuf_locals_dict_table); pFad - Phonifier reborn

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