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You like my 4x4 ordered dithering swagger?

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XANTRONIX Development 2016-05-11 22:34:09 -05:00
parent fc7f548c4d
commit ac88645817
1 changed files with 81 additions and 8 deletions
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89
src/test.c
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@ -7,6 +7,71 @@
#include <cammy/sram.h>
static uint32_t bayer_matrix[256] = {
/*
* Black gamut
*/
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
/*
* Black to dark gray gradient
*/
0x00018000, 0x00018000, 0x00018000, 0x00018000, 0x00018000, 0x00018000,
0x00018020, 0x00018020, 0x00018020, 0x00018020, 0x00018020, 0x00018020,
0x000180a0, 0x000180a0, 0x000180a0, 0x000180a0, 0x000180a0, 0x000180a0,
0x0001a0a0, 0x0001a0a0, 0x0001a0a0, 0x0001a0a0, 0x0001a0a0, 0x0001a0a0,
0x0001a4a0, 0x0001a4a0, 0x0001a4a0, 0x0001a4a0, 0x0001a4a0, 0x0001a4a0,
0x0001a4a1, 0x0001a4a1, 0x0001a4a1, 0x0001a4a1, 0x0001a4a1,
0x0001a4a5, 0x0001a4a5, 0x0001a4a5, 0x0001a4a5, 0x0001a4a5,
0x0001a5a5, 0x0001a5a5, 0x0001a5a5, 0x0001a5a5, 0x0001a5a5,
0x0001ada5, 0x0001ada5, 0x0001ada5, 0x0001ada5, 0x0001ada5,
0x0001ada7, 0x0001ada7, 0x0001ada7, 0x0001ada7, 0x0001ada7,
0x0001adaf, 0x0001adaf, 0x0001adaf, 0x0001adaf, 0x0001adaf,
0x0001afaf, 0x0001afaf, 0x0001afaf, 0x0001afaf, 0x0001afaf,
0x0001df5f, 0x0001df5f, 0x0001df5f, 0x0001df5f, 0x0001df5f,
0x0001df7f, 0x0001df7f, 0x0001df7f, 0x0001df7f, 0x0001df7f,
0x0001dfff, 0x0001dfff, 0x0001dfff, 0x0001dfff, 0x0001dfff,
0x0001ffff, 0x0001ffff, 0x0001ffff, 0x0001ffff, 0x0001ffff,
/*
* Dark gray to light gray gradient
*/
0x01028000, 0x01028000, 0x01028000, 0x01028000, 0x01028000,
0x01028020, 0x01028020, 0x01028020, 0x01028020, 0x01028020,
0x010280a0, 0x010280a0, 0x010280a0, 0x010280a0, 0x010280a0,
0x0102a0a0, 0x0102a0a0, 0x0102a0a0, 0x0102a0a0, 0x0102a0a0,
0x0102a4a0, 0x0102a4a0, 0x0102a4a0, 0x0102a4a0, 0x0102a4a0,
0x0102a4a1, 0x0102a4a1, 0x0102a4a1, 0x0102a4a1, 0x0102a4a1,
0x0102a4a5, 0x0102a4a5, 0x0102a4a5, 0x0102a4a5, 0x0102a4a5,
0x0102a5a5, 0x0102a5a5, 0x0102a5a5, 0x0102a5a5, 0x0102a5a5,
0x0102ada5, 0x0102ada5, 0x0102ada5, 0x0102ada5, 0x0102ada5,
0x0102ada7, 0x0102ada7, 0x0102ada7, 0x0102ada7, 0x0102ada7,
0x0102adaf, 0x0102adaf, 0x0102adaf, 0x0102adaf, 0x0102adaf,
0x0102afaf, 0x0102afaf, 0x0102afaf, 0x0102afaf, 0x0102afaf,
0x0102df5f, 0x0102df5f, 0x0102df5f, 0x0102df5f, 0x0102df5f,
0x0102df7f, 0x0102df7f, 0x0102df7f, 0x0102df7f, 0x0102df7f,
0x0102dfff, 0x0102dfff, 0x0102dfff, 0x0102dfff, 0x0102dfff,
0x0102ffff, 0x0102ffff, 0x0102ffff, 0x0102ffff, 0x0102ffff,
/* Light gray to white gradient */
0x02038000, 0x02038000, 0x02038000, 0x02038000, 0x02038000,
0x02038020, 0x02038020, 0x02038020, 0x02038020, 0x02038020,
0x020380a0, 0x020380a0, 0x020380a0, 0x020380a0, 0x020380a0,
0x0203a0a0, 0x0203a0a0, 0x0203a0a0, 0x0203a0a0, 0x0203a0a0,
0x0203a4a0, 0x0203a4a0, 0x0203a4a0, 0x0203a4a0, 0x0203a4a0,
0x0203a4a1, 0x0203a4a1, 0x0203a4a1, 0x0203a4a1, 0x0203a4a1,
0x0203a4a5, 0x0203a4a5, 0x0203a4a5, 0x0203a4a5, 0x0203a4a5,
0x0203a5a5, 0x0203a5a5, 0x0203a5a5, 0x0203a5a5, 0x0203a5a5,
0x0203ada5, 0x0203ada5, 0x0203ada5, 0x0203ada5, 0x0203ada5,
0x0203ada7, 0x0203ada7, 0x0203ada7, 0x0203ada7, 0x0203ada7,
0x0203adaf, 0x0203adaf, 0x0203adaf, 0x0203adaf, 0x0203adaf,
0x0203afaf, 0x0203afaf, 0x0203afaf, 0x0203afaf, 0x0203afaf, 0x0203afaf,
0x0203df5f, 0x0203df5f, 0x0203df5f, 0x0203df5f, 0x0203df5f, 0x0203df5f,
0x0203df7f, 0x0203df7f, 0x0203df7f, 0x0203df7f, 0x0203df7f, 0x0203df7f,
0x0203dfff, 0x0203dfff, 0x0203dfff, 0x0203dfff, 0x0203dfff, 0x0203dfff,
0x0203ffff, 0x0203ffff, 0x0203ffff, 0x0203ffff, 0x0203ffff, 0x0203ffff
};
static void usage(int argc, char **argv, const char *message, ...) {
if (message) {
va_list args;
@ -34,19 +99,27 @@ static void image_copy(cammy_sram_frame *frame, uint8_t *buf) {
for (y=0; y<CAMMY_SRAM_PHOTO_HEIGHT; y++) {
for (x=0; x<CAMMY_SRAM_PHOTO_WIDTH; x++) {
uint8_t r = buf[4*CAMMY_SRAM_PHOTO_WIDTH*y+4*x],
g = buf[4*CAMMY_SRAM_PHOTO_WIDTH*y+4*x+1],
b = buf[4*CAMMY_SRAM_PHOTO_WIDTH*y+4*x+2];
float avg = 255.0 - ((float)r + (float)g + (float)b) / 3;
uint8_t value = (uint8_t)(avg / 64.0);
cammy_sram_tile *tile = &frame->photo.tiles[y>>3][x>>3];
int tile_x = x & 7,
tile_y = y & 7;
uint8_t r = buf[4*CAMMY_SRAM_PHOTO_WIDTH*y+4*x],
g = buf[4*CAMMY_SRAM_PHOTO_WIDTH*y+4*x+1],
b = buf[4*CAMMY_SRAM_PHOTO_WIDTH*y+4*x+2];
uint8_t avg = (uint8_t)(((float)r + (float)g + (float)b) / 3);
uint32_t slot = bayer_matrix[avg];
uint32_t from = (slot & 0x03000000) >> 24;
uint32_t to = (slot & 0x00030000) >> 16;
uint8_t value;
if (slot & (0x8000 >> (x & 0x03) >> (y & 0x03))) {
value = to ^ 0x03;
} else {
value = from ^ 0x03;
}
tile->data[2*tile_y] |= (value & 0x01) << (7 - tile_x);
tile->data[2*tile_y+1] |= ((value & 0x02) >> 1) << (7 - tile_x);
}