TonBERRY/micropython
3
0
Fork 0
Code Pull Requests Activity

extmod/modframebuf: Add support for monochrome horizontal format.

Browse Source 
MHLSB and MHMSB formats are added to the framebuf module, which have 8
adjacent horizontal pixels represented in a single byte.
This commit is contained in:
Peter Hinch
2017-02-06 10:59:44 +00:00
committed by Damien George
parent fb981107eb
commit 231cfc84a7
3 changed files with 165 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
extmod/modframebuf.c
View File

@@ -53,6 +53,41 @@ typedef struct _mp_framebuf_p_t {
fill_rect_t fill_rect;
} mp_framebuf_p_t;
// constants for formats
#define FRAMEBUF_MVLSB (0)
#define FRAMEBUF_RGB565 (1)
#define FRAMEBUF_GS4_HMSB (2)
#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 color) {
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)) | ((color != 0) << offset);
}
STATIC uint32_t mono_horiz_getpixel(const mp_obj_framebuf_t *fb, int x, int y) {
size_t index = (x + y * fb->stride) >> 3;
int offset = fb->format == FRAMEBUF_MHMSB ? x & 0x07 : 7 - (x & 0x07);
return (((uint8_t*)fb->buf)[index] >> (offset)) & 0x01;
}
STATIC void mono_horiz_fill_rect(const mp_obj_framebuf_t *fb, int x, int y, int w, int h, uint32_t col) {
int reverse = fb->format == FRAMEBUF_MHMSB;
int advance = fb->stride >> 3;
while (w--) {
uint8_t *b = &((uint8_t*)fb->buf)[(x >> 3) + y * advance];
int offset = reverse ? x & 7 : 7 - (x & 7);
for (int hh = h; hh; --hh) {
*b = (*b & ~(0x01 << offset)) | ((col != 0) << offset);
b += advance;
}
++x;
}
}
// Functions for MVLSB format
STATIC void mvlsb_setpixel(const mp_obj_framebuf_t *fb, int x, int y, uint32_t color) {
@@ -148,15 +183,12 @@ STATIC void gs4_hmsb_fill_rect(const mp_obj_framebuf_t *fb, int x, int y, int w,
}
}
// constants for formats
#define FRAMEBUF_MVLSB (0)
#define FRAMEBUF_RGB565 (1)
#define FRAMEBUF_GS4_HMSB (2)
STATIC mp_framebuf_p_t formats[] = {
[FRAMEBUF_MVLSB] = {mvlsb_setpixel, mvlsb_getpixel, mvlsb_fill_rect},
[FRAMEBUF_RGB565] = {rgb565_setpixel, rgb565_getpixel, rgb565_fill_rect},
[FRAMEBUF_GS4_HMSB] = {gs4_hmsb_setpixel, gs4_hmsb_getpixel, gs4_hmsb_fill_rect},
[FRAMEBUF_MHLSB] = {mono_horiz_setpixel, mono_horiz_getpixel, mono_horiz_fill_rect},
[FRAMEBUF_MHMSB] = {mono_horiz_setpixel, mono_horiz_getpixel, mono_horiz_fill_rect},
};
static inline void setpixel(const mp_obj_framebuf_t *fb, int x, int y, uint32_t color) {
@@ -207,6 +239,10 @@ STATIC mp_obj_t framebuf_make_new(const mp_obj_type_t *type, size_t n_args, size
case FRAMEBUF_RGB565:
case FRAMEBUF_GS4_HMSB:
break;
case FRAMEBUF_MHLSB:
case FRAMEBUF_MHMSB:
o->stride = (o->stride + 7) & ~7;
break;
default:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"invalid format"));
@@ -545,6 +581,8 @@ STATIC const mp_rom_map_elem_t framebuf_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_MVLSB), MP_OBJ_NEW_SMALL_INT(FRAMEBUF_MVLSB) },
{ MP_ROM_QSTR(MP_QSTR_RGB565), MP_OBJ_NEW_SMALL_INT(FRAMEBUF_RGB565) },
{ MP_ROM_QSTR(MP_QSTR_GS4_HMSB), MP_OBJ_NEW_SMALL_INT(FRAMEBUF_GS4_HMSB) },
{ MP_ROM_QSTR(MP_QSTR_MHLSB), MP_OBJ_NEW_SMALL_INT(FRAMEBUF_MHLSB) },
{ MP_ROM_QSTR(MP_QSTR_MHMSB), MP_OBJ_NEW_SMALL_INT(FRAMEBUF_MHMSB) },
};
STATIC MP_DEFINE_CONST_DICT(framebuf_module_globals, framebuf_module_globals_table);