components/tiny_jpeg/tiny_jpeg.h

   1 // ============================================================
   2 // Public interface:
   3 // ============================================================
   4
   5 #ifndef TJE_HEADER_GUARD
   6 #define TJE_HEADER_GUARD
   7 #include "bsp_common.h"
   8 #define TJEI_BUFFER_SIZE 1024
   9
  10 #ifdef _WIN32
  11
  12 #include <windows.h>
  13 #ifndef snprintf
  14 #define snprintf sprintf_s
  15 #endif
  16 // Not quite the same but it works for us. If I am not mistaken, it differs
  17 // only in the return value.
  18
  19 #endif
  20
  21 #if 0
  22
  23 #define tje_log DBG
  24
  25 #else  // NDEBUG
  26 #define tje_log(...)
  27 #endif  // NDEBUG
  28
  29
  30
  31
  32
  33 #ifdef __cplusplus
  34 extern "C"
  35 {
  36 #endif
  37
  38 #if defined(__GNUC__) || defined(__clang__)
  39 #pragma GCC diagnostic push
  40 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"  // We use {0}, which will zero-out the struct.
  41 #pragma GCC diagnostic ignored "-Wmissing-braces"
  42 #pragma GCC diagnostic ignored "-Wpadded"
  43 #endif
  44
  45 // - tje_encode_with_func -
  46 //
  47 // Usage
  48 //  Same as tje_encode_to_file_at_quality, but it takes a callback that knows
  49 //  how to handle (or ignore) `context`. The callback receives an array `data`
  50 //  of `size` bytes, which can be written directly to a file. There is no need
  51 //  to free the data.
  52
  53 typedef void tje_write_func(void* context, void* data, int size);
  54 void *jpeg_encode_init(tje_write_func* func, void* context, uint8_t quality, uint32_t width, uint32_t height, uint8_t src_num_components);
  55 void jpeg_encode_run(void *ctx, uint8_t *src_data);
  56 void jpeg_encode_end(void *ctx);
  57 // ============================================================
  58 //
  59 #if defined(__GNUC__) || defined(__clang__)
  60 #pragma GCC diagnostic pop
  61 #endif
  62
  63
  64 #ifdef __cplusplus
  65 }  // extern C
  66 #endif
  67 #endif