Updated external libraries

1 files changed, 101 insertions, 44 deletions

diff --git a/src/external/stb_image_write.h b/src/external/stb_image_write.h
index c05e9581..00ab092a 100644
--- a/src/external/stb_image_write.h
+++ b/src/external/stb_image_write.h
@@ -1,4 +1,4 @@
-/* stb_image_write - v1.09 - public domain - http://nothings.org/stb/stb_image_write.h
+/* stb_image_write - v1.10 - public domain - http://nothings.org/stb/stb_image_write.h
    writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015
                                      no warranty implied; use at your own risk
 
@@ -17,8 +17,7 @@
 
 ABOUT:
 
-   This header file is a library for writing images to C stdio. It could be
-   adapted to write to memory or a general streaming interface; let me know.
+   This header file is a library for writing images to C stdio or a callback.
 
    The PNG output is not optimal; it is 20-50% larger than the file
    written by a decent optimizing implementation; though providing a custom
@@ -38,6 +37,14 @@ BUILDING:
    The returned data will be freed with STBIW_FREE() (free() by default),
    so it must be heap allocated with STBIW_MALLOC() (malloc() by default),
 
+UNICODE:
+
+   If compiling for Windows and you wish to use Unicode filenames, compile
+   with
+       #define STBIW_WINDOWS_UTF8
+   and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert
+   Windows wchar_t filenames to utf8.
+
 USAGE:
 
    There are five functions, one for each image file format:
@@ -148,6 +155,8 @@ LICENSE
 #ifndef INCLUDE_STB_IMAGE_WRITE_H
 #define INCLUDE_STB_IMAGE_WRITE_H
 
+#include <stdlib.h>
+
 // if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline'
 #ifndef STBIWDEF
 #ifdef STB_IMAGE_WRITE_STATIC
@@ -173,6 +182,10 @@ STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const
 STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void  *data);
 STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data);
 STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void  *data, int quality);
+
+#ifdef STBI_WINDOWS_UTF8
+STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
+#endif
 #endif
 
 typedef void stbi_write_func(void *context, void *data, int size);
@@ -275,15 +288,52 @@ static void stbi__stdio_write(void *context, void *data, int size)
    fwrite(data,1,size,(FILE*) context);
 }
 
-static int stbi__start_write_file(stbi__write_context *s, const char *filename)
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+#ifdef __cplusplus
+#define STBIW_EXTERN extern "C"
+#else
+#define STBIW_EXTERN extern
+#endif
+STBIW_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
+STBIW_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
+
+STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
+{
+	return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, bufferlen, NULL, NULL);
+}
+#endif
+
+static FILE *stbiw__fopen(char const *filename, char const *mode)
 {
    FILE *f;
-#ifdef STBI_MSC_SECURE_CRT
-   if (fopen_s(&f, filename, "wb"))
-      f = NULL;
+#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
+   wchar_t wMode[64];
+   wchar_t wFilename[1024];
+	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
+      return 0;
+	
+	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
+      return 0;
+
+#if _MSC_VER >= 1400
+	if (0 != _wfopen_s(&f, wFilename, wMode))
+		f = 0;
+#else
+   f = _wfopen(wFilename, wMode);
+#endif
+
+#elif defined(_MSC_VER) && _MSC_VER >= 1400
+   if (0 != fopen_s(&f, filename, mode))
+      f=0;
 #else
-   f = fopen(filename, "wb");
+   f = fopen(filename, mode);
 #endif
+   return f;
+}
+
+static int stbi__start_write_file(stbi__write_context *s, const char *filename)
+{
+   FILE *f = stbiw__fopen(filename, "wb");
    stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f);
    return f != NULL;
 }
@@ -552,7 +602,7 @@ STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const
 
 #define stbiw__max(a, b)  ((a) > (b) ? (a) : (b))
 
-void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear)
+static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear)
 {
    int exponent;
    float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2]));
@@ -569,7 +619,7 @@ void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear)
    }
 }
 
-void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte)
+static void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte)
 {
    unsigned char lengthbyte = STBIW_UCHAR(length+128);
    STBIW_ASSERT(length+128 <= 255);
@@ -577,7 +627,7 @@ void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char dat
    s->func(s->context, &databyte, 1);
 }
 
-void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data)
+static void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data)
 {
    unsigned char lengthbyte = STBIW_UCHAR(length);
    STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code
@@ -585,7 +635,7 @@ void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *d
    s->func(s->context, data, length);
 }
 
-void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline)
+static void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline)
 {
    unsigned char scanlineheader[4] = { 2, 2, 0, 0 };
    unsigned char rgbe[4];
@@ -694,7 +744,7 @@ static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, f
       s->func(s->context, buffer, len);
 
       for(i=0; i < y; i++)
-         stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i)*x);
+         stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i));
       STBIW_FREE(scratch);
       return 1;
    }
@@ -809,7 +859,7 @@ static unsigned int stbiw__zhash(unsigned char *data)
 
 #endif // STBIW_ZLIB_COMPRESS
 
-unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality)
+STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality)
 {
 #ifdef STBIW_ZLIB_COMPRESS
    // user provided a zlib compress implementation, use that
@@ -923,6 +973,9 @@ unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_l
 
 static unsigned int stbiw__crc32(unsigned char *buffer, int len)
 {
+#ifdef STBIW_CRC32
+    return STBIW_CRC32(buffer, len);
+#else
    static unsigned int crc_table[256] =
    {
       0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
@@ -964,6 +1017,7 @@ static unsigned int stbiw__crc32(unsigned char *buffer, int len)
    for (i=0; i < len; ++i)
       crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)];
    return ~crc;
+#endif
 }
 
 #define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4)
@@ -994,9 +1048,15 @@ static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int
    int type = mymap[filter_type];
    unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y);
    int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes;
+    
+   if (type==0) {
+      memcpy(line_buffer, z, width*n);
+      return;
+   }
+
+   // first loop isn't optimized since it's just one pixel    
    for (i = 0; i < n; ++i) {
       switch (type) {
-         case 0: line_buffer[i] = z[i]; break;
          case 1: line_buffer[i] = z[i]; break;
          case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break;
          case 3: line_buffer[i] = z[i] - (z[i-signed_stride]>>1); break;
@@ -1005,20 +1065,17 @@ static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int
          case 6: line_buffer[i] = z[i]; break;
       }
    }
-   for (i=n; i < width*n; ++i) {
-      switch (type) {
-         case 0: line_buffer[i] = z[i]; break;
-         case 1: line_buffer[i] = z[i] - z[i-n]; break;
-         case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break;
-         case 3: line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break;
-         case 4: line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break;
-         case 5: line_buffer[i] = z[i] - (z[i-n]>>1); break;
-         case 6: line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break;
-      }
+   switch (type) {
+      case 1: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-n]; break;
+      case 2: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-signed_stride]; break;
+      case 3: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break;
+      case 4: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break;
+      case 5: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - (z[i-n]>>1); break;
+      case 6: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break;
    }
 }
 
-unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len)
+STBIWDEF unsigned char *stbi_write_png_to_mem(const unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len)
 {
    int force_filter = stbi_write_force_png_filter;
    int ctype[5] = { -1, 0, 4, 2, 6 };
@@ -1040,11 +1097,11 @@ unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, in
       int filter_type;
       if (force_filter > -1) {
          filter_type = force_filter;
-         stbiw__encode_png_line(pixels, stride_bytes, x, y, j, n, force_filter, line_buffer);
+         stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, force_filter, line_buffer);
       } else { // Estimate the best filter by running through all of them:
          int best_filter = 0, best_filter_val = 0x7fffffff, est, i;
          for (filter_type = 0; filter_type < 5; filter_type++) {
-            stbiw__encode_png_line(pixels, stride_bytes, x, y, j, n, filter_type, line_buffer);
+            stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, filter_type, line_buffer);
 
             // Estimate the entropy of the line using this filter; the less, the better.
             est = 0;
@@ -1057,7 +1114,7 @@ unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, in
             }
          }
          if (filter_type != best_filter) {  // If the last iteration already got us the best filter, don't redo it
-            stbiw__encode_png_line(pixels, stride_bytes, x, y, j, n, best_filter, line_buffer);
+            stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, best_filter, line_buffer);
             filter_type = best_filter;
          }
       }
@@ -1109,14 +1166,10 @@ STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const
 {
    FILE *f;
    int len;
-   unsigned char *png = stbi_write_png_to_mem((unsigned char *) data, stride_bytes, x, y, comp, &len);
+   unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len);
    if (png == NULL) return 0;
-#ifdef STBI_MSC_SECURE_CRT
-   if (fopen_s(&f, filename, "wb"))
-      f = NULL;
-#else
-   f = fopen(filename, "wb");
-#endif
+
+   f = stbiw__fopen(filename, "wb");
    if (!f) { STBIW_FREE(png); return 0; }
    fwrite(png, 1, len, f);
    fclose(f);
@@ -1128,7 +1181,7 @@ STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const
 STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes)
 {
    int len;
-   unsigned char *png = stbi_write_png_to_mem((unsigned char *) data, stride_bytes, x, y, comp, &len);
+   unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len);
    if (png == NULL) return 0;
    func(context, png, len);
    STBIW_FREE(png);
@@ -1423,15 +1476,17 @@ static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, in
          for(x = 0; x < width; x += 8) {
             float YDU[64], UDU[64], VDU[64];
             for(row = y, pos = 0; row < y+8; ++row) {
+               int p;
+               if(row < height) {
+                  p = (stbi__flip_vertically_on_write ? (height-1-row) : row)*width*comp;
+               } else {
+                  // row >= height => use last input row (=> first if flipping)
+                  p = stbi__flip_vertically_on_write ? 0 : ((height-1)*width*comp);
+               }
                for(col = x; col < x+8; ++col, ++pos) {
-                  int p = (stbi__flip_vertically_on_write ? height-1-row : row)*width*comp + col*comp;
                   float r, g, b;
-                  if(row >= height) {
-                     p -= width*comp*(row+1 - height);
-                  }
-                  if(col >= width) {
-                     p -= comp*(col+1 - width);
-                  }
+                  // if col >= width => use pixel from last input column
+                  p += ((col < width) ? col : (width-1))*comp;
 
                   r = imageData[p+0];
                   g = imageData[p+ofsG];
@@ -1483,6 +1538,8 @@ STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const
 #endif // STB_IMAGE_WRITE_IMPLEMENTATION
 
 /* Revision history
+      1.10  (2019-02-07)
+             support utf8 filenames in Windows; fix warnings and platform ifdefs 
       1.09  (2018-02-11)
              fix typo in zlib quality API, improve STB_I_W_STATIC in C++
       1.08  (2018-01-29)