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Anima conversion tool update

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whowe 2024-06-09 15:34:04 +08:00
parent b562d0e2b0
commit f40c956af4
1 changed files with 125 additions and 0 deletions
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125
firmware/tools/anima_conv.c Normal file
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/*
* Image compression tool
* From 8bit grayscale to 4bit grayscale and zero-run-length encoding
* Input: ani_data[], ani_width, ani_height
* Frame count is calculated from ani_data size and frame size (ani_width * ani_height)
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "../src/glow.h"
const char *name = "glow";
static int col = 0;
static void line_begin()
{
col = 0;
}
static void out_byte(uint8_t byte)
{
if (col == 0) {
printf("\n ");
}
printf(" 0x%02x,", byte);
col = (col + 1) % 16;
}
static int zero_count = 0;
static int out_zero()
{
if (!zero_count) {
return 0;
}
out_byte(0);
out_byte(zero_count);
zero_count = 0;
return 2;
}
static int encode_byte(uint8_t byte)
{
if (byte == 0) {
zero_count++;
}
int written = 0;
if ((byte != 0) || (zero_count == 255)) {
written += out_zero();
}
if (byte != 0) {
out_byte(byte);
written++;
}
return written;
}
static int encode_finish()
{
return out_zero();
}
static inline uint8_t gs8bto4b(const uint8_t bytes[2])
{
return (bytes[0] & 0xf0) | (bytes[1] >> 4);
}
static int out_frame(int frame, int frame_size)
{
const uint8_t *frame_data = ani_data + frame * frame_size;
printf("\n // frame %d", frame);
line_begin();
int written = 0;
for (int i = 0; i < frame_size / 2; i++) {
written += encode_byte(gs8bto4b(frame_data + i * 2));
}
written += encode_finish();
return written;
}
const char *headlines =
"/* Generated by anima_conv.c, 4 bit per pixel, zero run-length compressed. */\n\n"
"#include \"anima.h\"\n\n";
static const int frame_size = ani_width * ani_height;
static const int frame_count = sizeof(ani_data) / frame_size;
int main()
{
int frame_index[frame_count];
printf("%s", headlines);
printf("const uint8_t %s_data[] = {", name);
int sum = 0;
for (int frame = 0; frame < frame_count; frame++) {
frame_index[frame] = sum;
sum += out_frame(frame, frame_size);
}
printf("\n};\n\n");
printf("const uint32_t %s_index[] = {\n ", name);
for (int frame = 0; frame < frame_count; frame++) {
printf(" %d,", frame_index[frame]);
}
printf("\n};\n\n");
printf("const anima_t %s_ani = {\n", name);
printf(" .width = %d,\n", ani_width);
printf(" .height = %d,\n", ani_height);
printf(" .frames = %d,\n", frame_count);
printf(" .index = %s_index,\n", name);
printf(" .data = %s_data,\n", name);
printf("};\n");
fprintf(stderr, "Frame count: %d\n", frame_count);
fprintf(stderr, "Total: %d\n", sum);
}