| 38 | #include "ThirdParty/stb_image_write.h" |
| 39 | |
| 40 | int main(int argc, char **argv) |
| 41 | { |
| 42 | // Parse command line |
| 43 | if (argc != 3) |
| 44 | { |
| 45 | printf("Usage:\n" |
| 46 | " %s <source> <dest>\n\n" |
| 47 | " <source> : Uncompressed LDR source image.\n" |
| 48 | " <dest> : Uncompressed LDR destination image (png).\n" |
| 49 | , argv[0]); |
| 50 | return 1; |
| 51 | } |
| 52 | |
| 53 | // ------------------------------------------------------------------------ |
| 54 | // For the purposes of this sample we hard-code the compressor settings |
| 55 | static const unsigned int thread_count = 1; |
| 56 | static const unsigned int block_x = 6; |
| 57 | static const unsigned int block_y = 6; |
| 58 | static const unsigned int block_z = 1; |
| 59 | static const astcenc_profile profile = ASTCENC_PRF_LDR; |
| 60 | static const float quality = ASTCENC_PRE_MEDIUM; |
| 61 | static const astcenc_swizzle swizzle { |
| 62 | ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A |
| 63 | }; |
| 64 | |
| 65 | // ------------------------------------------------------------------------ |
| 66 | // Load input image, forcing 4 components |
| 67 | int image_x, image_y, image_c; |
| 68 | uint8_t *image_data = (uint8_t*)stbi_load(argv[1], &image_x, &image_y, &image_c, 4); |
| 69 | if (!image_data) |
| 70 | { |
| 71 | printf("Failed to load image \"%s\"\n", argv[1]); |
| 72 | return 1; |
| 73 | } |
| 74 | |
| 75 | // Compute the number of ASTC blocks in each dimension |
| 76 | unsigned int block_count_x = (image_x + block_x - 1) / block_x; |
| 77 | unsigned int block_count_y = (image_y + block_y - 1) / block_y; |
| 78 | |
| 79 | // ------------------------------------------------------------------------ |
| 80 | // Initialize the default configuration for the block size and quality |
| 81 | astcenc_config config; |
| 82 | astcenc_error status; |
| 83 | status = astcenc_config_init(profile, block_x, block_y, block_z, quality, 0, &config); |
| 84 | if (status != ASTCENC_SUCCESS) |
| 85 | { |
| 86 | printf("ERROR: Codec config init failed: %s\n", astcenc_get_error_string(status)); |
| 87 | return 1; |
| 88 | } |
| 89 | |
| 90 | // ... power users can customize any config settings after calling |
| 91 | // config_init() and before calling context alloc(). |
| 92 | |
| 93 | // ------------------------------------------------------------------------ |
| 94 | // Create a context based on the configuration |
| 95 | astcenc_context* context; |
| 96 | status = astcenc_context_alloc(&config, thread_count, &context, nullptr); |
| 97 | if (status != ASTCENC_SUCCESS) |
nothing calls this directly
no test coverage detected