Commit 53ad681e authored by Damien George's avatar Damien George
Browse files

extmod: Add initial framebuf module.

parent 3a37426b
/*
* 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/nlr.h"
#include "py/obj.h"
#include "py/runtime.h"
#if MICROPY_PY_FRAMEBUF
#include "font_petme128_8x8.h"
// 1-bit frame buffer, each byte is a column of 8 pixels
typedef struct _mp_obj_framebuf1_t {
mp_obj_base_t base;
uint8_t *buf;
uint16_t width, height, stride;
} mp_obj_framebuf1_t;
STATIC mp_obj_t framebuf1_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 3, 4, false);
mp_obj_framebuf1_t *o = m_new_obj(mp_obj_framebuf1_t);
o->base.type = type;
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_WRITE);
o->buf = bufinfo.buf;
o->width = mp_obj_get_int(args[1]);
o->height = mp_obj_get_int(args[2]);
o->stride = o->width;
if (n_args >= 4) {
o->stride = mp_obj_get_int(args[3]);
}
return MP_OBJ_FROM_PTR(o);
}
STATIC mp_obj_t framebuf1_fill(mp_obj_t self_in, mp_obj_t col_in) {
mp_obj_framebuf1_t *self = MP_OBJ_TO_PTR(self_in);
mp_int_t col = mp_obj_get_int(col_in);
if (col) {
col = 0xff;
}
for (int y = 0; y < self->height / 8; ++y) {
memset(self->buf + y * self->stride, col, self->width);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(framebuf1_fill_obj, framebuf1_fill);
STATIC mp_obj_t framebuf1_pixel(size_t n_args, const mp_obj_t *args) {
mp_obj_framebuf1_t *self = MP_OBJ_TO_PTR(args[0]);
mp_int_t x = mp_obj_get_int(args[1]);
mp_int_t y = mp_obj_get_int(args[2]);
if (0 <= x && x < self->width && 0 <= y && y < self->height) {
int index = (y / 8) * self->stride + x;
if (n_args == 3) {
// get
return MP_OBJ_NEW_SMALL_INT(self->buf[index] >> (y & 7));
} else {
// set
if (mp_obj_get_int(args[3])) {
self->buf[index] |= (1 << (y & 7));
} else {
self->buf[index] &= ~(1 << (y & 7));
}
}
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(framebuf1_pixel_obj, 3, 4, framebuf1_pixel);
STATIC mp_obj_t framebuf1_scroll(mp_obj_t self_in, mp_obj_t xstep_in, mp_obj_t ystep_in) {
mp_obj_framebuf1_t *self = MP_OBJ_TO_PTR(self_in);
mp_int_t xstep = mp_obj_get_int(xstep_in);
mp_int_t ystep = mp_obj_get_int(ystep_in);
if (xstep == 0 && ystep > 0) {
for (int y = self->height / 8; y > 0;) {
--y;
for (int x = 0; x < self->width; ++x) {
int prev = 0;
if (y > 0) {
prev = (self->buf[(y - 1) * self->stride + x] >> (8 - ystep)) & ((1 << ystep) - 1);
}
self->buf[y * self->stride + x] = (self->buf[y * self->stride + x] << ystep) | prev;
}
}
} else if (xstep == 0 && ystep < 0) {
for (int y = 0; y < self->height / 8; ++y) {
for (int x = 0; x < self->width; ++x) {
int prev = 0;
if (y + 1 < self->height / 8) {
prev = self->buf[(y + 1) * self->stride + x] << (8 + ystep);
}
self->buf[y * self->stride + x] = (self->buf[y * self->stride + x] >> -ystep) | prev;
}
}
}
// TODO xstep!=0
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(framebuf1_scroll_obj, framebuf1_scroll);
STATIC mp_obj_t framebuf1_text(size_t n_args, const mp_obj_t *args) {
// extract arguments
mp_obj_framebuf1_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 col = 1;
if (n_args >= 5) {
col = mp_obj_get_int(args[4]);
}
// 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
for (int j = 0; j < 8; j++, x0++) {
if (0 <= x0 && x0 < self->width) { // clip x
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++) { // scan over vertical column
if (vline_data & 1) { // only draw if pixel set
if (0 <= y && y < self->height) { // clip y
uint byte_pos = x0 + self->stride * ((uint)y >> 3);
if (col == 0) {
// clear pixel
self->buf[byte_pos] &= ~(1 << (y & 7));
} else {
// set pixel
self->buf[byte_pos] |= 1 << (y & 7);
}
}
}
}
}
}
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(framebuf1_text_obj, 4, 5, framebuf1_text);
STATIC const mp_rom_map_elem_t framebuf1_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_fill), MP_ROM_PTR(&framebuf1_fill_obj) },
{ MP_ROM_QSTR(MP_QSTR_pixel), MP_ROM_PTR(&framebuf1_pixel_obj) },
{ MP_ROM_QSTR(MP_QSTR_scroll), MP_ROM_PTR(&framebuf1_scroll_obj) },
{ MP_ROM_QSTR(MP_QSTR_text), MP_ROM_PTR(&framebuf1_text_obj) },
};
STATIC MP_DEFINE_CONST_DICT(framebuf1_locals_dict, framebuf1_locals_dict_table);
STATIC const mp_obj_type_t mp_type_framebuf1 = {
{ &mp_type_type },
.name = MP_QSTR_FrameBuffer1,
.make_new = framebuf1_make_new,
.locals_dict = (mp_obj_t)&framebuf1_locals_dict,
};
STATIC const mp_rom_map_elem_t framebuf_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_framebuf) },
{ MP_ROM_QSTR(MP_QSTR_FrameBuffer1), MP_ROM_PTR(&mp_type_framebuf1) },
};
STATIC MP_DEFINE_CONST_DICT(framebuf_module_globals, framebuf_module_globals_table);
const mp_obj_module_t mp_module_framebuf = {
.base = { &mp_type_module },
.name = MP_QSTR_framebuf,
.globals = (mp_obj_dict_t*)&framebuf_module_globals,
};
#endif // MICROPY_PY_FRAMEBUF
......@@ -106,6 +106,7 @@ extern const mp_obj_module_t mp_module_ussl;
extern const mp_obj_module_t mp_module_machine;
extern const mp_obj_module_t mp_module_lwip;
extern const mp_obj_module_t mp_module_websocket;
extern const mp_obj_module_t mp_module_framebuf;
// extmod functions
MP_DECLARE_CONST_FUN_OBJ(pyb_mount_obj);
......
......@@ -845,6 +845,10 @@ typedef double mp_float_t;
#define MICROPY_PY_WEBSOCKET (0)
#endif
#ifndef MICROPY_PY_FRAMEBUF
#define MICROPY_PY_FRAMEBUF (0)
#endif
/*****************************************************************************/
/* Hooks for a port to add builtins */
......
......@@ -196,6 +196,9 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
#if MICROPY_PY_WEBSOCKET
{ MP_ROM_QSTR(MP_QSTR_websocket), MP_ROM_PTR(&mp_module_websocket) },
#endif
#if MICROPY_PY_FRAMEBUF
{ MP_ROM_QSTR(MP_QSTR_framebuf), MP_ROM_PTR(&mp_module_framebuf) },
#endif
// extra builtin modules as defined by a port
MICROPY_PORT_BUILTIN_MODULES
......
......@@ -170,6 +170,7 @@ PY_O_BASENAME = \
../extmod/modussl.o \
../extmod/modurandom.o \
../extmod/modwebsocket.o \
../extmod/modframebuf.o \
../extmod/fsusermount.o \
../extmod/vfs_fat.o \
../extmod/vfs_fat_ffconf.o \
......
......@@ -761,3 +761,12 @@ Q(flush)
#if MICROPY_PY_WEBSOCKET
Q(websocket)
#endif
#if MICROPY_PY_FRAMEBUF
Q(framebuf)
Q(FrameBuffer1)
Q(fill)
Q(pixel)
Q(scroll)
Q(text)
#endif
......@@ -24,7 +24,7 @@
* THE SOFTWARE.
*/
const uint8_t font_petme128_8x8[] = {
static const uint8_t font_petme128_8x8[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, // 32=
0x00,0x00,0x00,0x4f,0x4f,0x00,0x00,0x00, // 33=!
0x00,0x07,0x07,0x00,0x00,0x07,0x07,0x00, // 34="
......
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