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Optimized asset building for speed by adding a buffer in png conversion from rgba8888 to rgb565

This commit is contained in:
Ulysse Cura 2026-08-13 19:05:04 +02:00
parent 02b87270bb
commit d40f1943e5
1 changed files with 20 additions and 16 deletions
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36
assets/asset_builder/src/asset_file.c
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@ -206,25 +206,27 @@ int parse_png_for_content_and_write(const char *input_file_name, FILE *output_fi
}
// Prepare storage.
png_byte pixels[height * row_length];
png_bytep row_ptrs[height];
png_byte src_pixels[height * row_length];
png_bytep src_row_ptrs[height];
for(png_uint_32 i = 0; i < height; i++)
row_ptrs[i] = &pixels[i * row_length];
src_row_ptrs[i] = &src_pixels[i * row_length];
// Read pixels.
png_read_image(png_ptr, row_ptrs);
png_read_image(png_ptr, src_row_ptrs);
uint16_t dst_pixels[width * height * sizeof(uint16_t)];
for(size_t i = 0; i < height; i++)
{
for(size_t j = 0; j < row_length; j += 4)
for(size_t j = 0; j < width; j += 1)
{
uint8_t r, g, b;
if(pixels[i * row_length + j + 3])
if(src_pixels[i * row_length + j * 4 + 3])
{
r = pixels[i * row_length + j] >> 3;
g = pixels[i * row_length + j + 1] >> 2;
b = pixels[i * row_length + j + 2] >> 3;
r = src_pixels[i * row_length + j * 4] >> 3;
g = src_pixels[i * row_length + j * 4 + 1] >> 2;
b = src_pixels[i * row_length + j * 4 + 2] >> 3;
}
else
{
@ -235,18 +237,20 @@ int parse_png_for_content_and_write(const char *input_file_name, FILE *output_fi
uint16_t pixel = ((r) << 11) | ((g) << 5) | b;
// printf("\033[48;2;%d;%d;%dm ", r << 3, g << 2, b << 3);
dst_pixels[i * width + j] = pixel;
if(fwrite(&pixel, sizeof(uint16_t), 1, output_file) != 1)
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
fclose(input_file);
return WRITE_FAILED;
}
// printf("\033[48;2;%d;%d;%dm ", r << 3, g << 2, b << 3);
}
// puts("\033[m");
}
if(fwrite(&dst_pixels, width * height * sizeof(uint16_t), 1, output_file) != 1)
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
fclose(input_file);
return WRITE_FAILED;
}
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
fclose(input_file);