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modframebuf.c

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  • modframebuf.c 21.12 KiB
    /*
     * This file is part of the MicroPython project, http://micropython.org/
     *
     * The MIT License (MIT)
     *
     * Copyright (c) 2016 Damien P. George
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy
     * of this software and associated documentation files (the "Software"), to deal
     * in the Software without restriction, including without limitation the rights
     * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     * copies of the Software, and to permit persons to whom the Software is
     * furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice shall be included in
     * all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     * THE SOFTWARE.
     */
    
    #include <stdio.h>
    #include <string.h>
    
    #include "py/runtime.h"
    
    #if MICROPY_PY_FRAMEBUF
    
    #include "ports/stm32/font_petme128_8x8.h"
    
    typedef struct _mp_obj_framebuf_t {
        mp_obj_base_t base;
        mp_obj_t buf_obj; // need to store this to prevent GC from reclaiming buf
        void *buf;
        uint16_t width, height, stride;
        uint8_t format;
    } mp_obj_framebuf_t;
    
    typedef void (*setpixel_t)(const mp_obj_framebuf_t*, int, int, uint32_t);
    typedef uint32_t (*getpixel_t)(const mp_obj_framebuf_t*, int, int);
    typedef void (*fill_rect_t)(const mp_obj_framebuf_t *, int, int, int, int, uint32_t);
    
    typedef struct _mp_framebuf_p_t {
        setpixel_t setpixel;
        getpixel_t getpixel;
        fill_rect_t fill_rect;
    } mp_framebuf_p_t;
    
    // constants for formats
    #define FRAMEBUF_MVLSB    (0)
    #define FRAMEBUF_RGB565   (1)
    #define FRAMEBUF_GS2_HMSB (5)
    #define FRAMEBUF_GS4_HMSB (2)
    #define FRAMEBUF_GS8      (6)
    #define FRAMEBUF_MHLSB    (3)
    #define FRAMEBUF_MHMSB    (4)
    
    // Functions for MHLSB and MHMSB
    
    STATIC void mono_horiz_setpixel(const mp_obj_framebuf_t *fb, int x, int y, uint32_t col) {
        size_t index = (x + y * fb->stride) >> 3;
        int offset = fb->format == FRAMEBUF_MHMSB ? x & 0x07 : 7 - (x & 0x07);
        ((uint8_t*)fb->buf)[index] = (((uint8_t*)fb->buf)[index] & ~(0x01 << offset)) | ((col != 0) << offset);
    }