update stb to latest master Merge commit 'ac7437c89bbd8a6626c9f05548bbddfc1a961793'

external/stb/stb/README.md

@@ -24,10 +24,10 @@ library    | lastest version | category | LoC | description
 --------------------- | ---- | -------- | --- | --------------------------------
 **[stb_vorbis.c](stb_vorbis.c)** | 1.22 | audio | 5584 | decode ogg vorbis files from file/memory to float/16-bit signed output
 **[stb_hexwave.h](stb_hexwave.h)** | 0.5 | audio | 680 | audio waveform synthesizer
-**[stb_image.h](stb_image.h)** | 2.29 | graphics | 7985 | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
-**[stb_truetype.h](stb_truetype.h)** | 1.26 | graphics | 5077 | parse, decode, and rasterize characters from truetype fonts
+**[stb_image.h](stb_image.h)** | 2.30 | graphics | 7988 | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
+**[stb_truetype.h](stb_truetype.h)** | 1.26 | graphics | 5079 | parse, decode, and rasterize characters from truetype fonts
 **[stb_image_write.h](stb_image_write.h)** | 1.16 | graphics | 1724 | image writing to disk: PNG, TGA, BMP
-**[stb_image_resize2.h](stb_image_resize2.h)** | 2.04 | graphics | 10325 | resize images larger/smaller with good quality
+**[stb_image_resize2.h](stb_image_resize2.h)** | 2.09 | graphics | 10561 | resize images larger/smaller with good quality
 **[stb_rect_pack.h](stb_rect_pack.h)** | 1.01 | graphics | 623 | simple 2D rectangle packer with decent quality
 **[stb_perlin.h](stb_perlin.h)** | 0.5 | graphics | 428 | perlin's revised simplex noise w/ different seeds
 **[stb_ds.h](stb_ds.h)** | 0.67 | utility | 1895 | typesafe dynamic array and hash tables for C, will compile in C++
@@ -38,14 +38,14 @@ library    | lastest version | category | LoC | description
 **[stb_easy_font.h](stb_easy_font.h)** | 1.1 | 3D graphics | 305 | quick-and-dirty easy-to-deploy bitmap font for printing frame rate, etc
 **[stb_tilemap_editor.h](stb_tilemap_editor.h)** | 0.42 | game dev | 4187 | embeddable tilemap editor
 **[stb_herringbone_wa...](stb_herringbone_wang_tile.h)** | 0.7 | game dev | 1221 | herringbone Wang tile map generator
-**[stb_c_lexer.h](stb_c_lexer.h)** | 0.12 | parsing | 940 | simplify writing parsers for C-like languages
+**[stb_c_lexer.h](stb_c_lexer.h)** | 0.12 | parsing | 941 | simplify writing parsers for C-like languages
 **[stb_divide.h](stb_divide.h)** | 0.94 | math | 433 | more useful 32-bit modulus e.g. "euclidean divide"
 **[stb_connected_comp...](stb_connected_components.h)** | 0.96 | misc | 1049 | incrementally compute reachability on grids
 **[stb_leakcheck.h](stb_leakcheck.h)** | 0.6 | misc | 194 | quick-and-dirty malloc/free leak-checking
 **[stb_include.h](stb_include.h)** | 0.02 | misc | 295 | implement recursive #include support, particularly for GLSL
 
 Total libraries: 21
-Total lines of C code: 50806
+Total lines of C code: 51048
 
 
 FAQ

external/stb/stb/stb_c_lexer.h

@@ -38,6 +38,7 @@
 // Contributors:
 //   Arpad Goretity (bugfix)
 //   Alan Hickman (hex floats)
+//   github:mundusnine (bugfix)
 //
 // LICENSE
 //
@@ -562,7 +563,6 @@ int stb_c_lexer_get_token(stb_lexer *lexer)
          {
             int n = 0;
             lexer->string = lexer->string_storage;
-            lexer->string_len = n;
             do {
                if (n+1 >= lexer->string_storage_len)
                   return stb__clex_token(lexer, CLEX_parse_error, p, p+n);
@@ -576,6 +576,7 @@ int stb_c_lexer_get_token(stb_lexer *lexer)
                 STB_C_LEX_DOLLAR_IDENTIFIER( || p[n] == '$' )
             );
             lexer->string[n] = 0;
+            lexer->string_len = n;
             return stb__clex_token(lexer, CLEX_id, p, p+n-1);
          }
 

external/stb/stb/stb_image.h

@@ -1,4 +1,4 @@
-/* stb_image - v2.29 - public domain image loader - http://nothings.org/stb
+/* stb_image - v2.30 - public domain image loader - http://nothings.org/stb
                                   no warranty implied; use at your own risk
 
    Do this:
@@ -48,6 +48,7 @@ LICENSE
 
 RECENT REVISION HISTORY:
 
+      2.30  (2024-05-31) avoid erroneous gcc warning
       2.29  (2023-05-xx) optimizations
       2.28  (2023-01-29) many error fixes, security errors, just tons of stuff
       2.27  (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
@@ -5159,9 +5160,11 @@ static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
                // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now.
                if (scan == STBI__SCAN_header) { ++s->img_n; return 1; }
                if (z->depth == 16) {
-                  for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
+                  for (k = 0; k < s->img_n && k < 3; ++k) // extra loop test to suppress false GCC warning
+                     tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
                } else {
-                  for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
+                  for (k = 0; k < s->img_n && k < 3; ++k)
+                     tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
                }
             }
             break;

external/stb/stb/stb_truetype.h

@@ -54,7 +54,7 @@
 //       Hou Qiming                 Derek Vinyard
 //       Rob Loach                  Cort Stratton
 //       Kenney Phillis Jr.         Brian Costabile
-//       Ken Voskuil (kaesve)
+//       Ken Voskuil (kaesve)       Yakov Galka
 //
 // VERSION HISTORY
 //
@@ -4604,6 +4604,8 @@ STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float sc
    scale_y = -scale_y;
 
    {
+      // distance from singular values (in the same units as the pixel grid)
+      const float eps = 1./1024, eps2 = eps*eps;
       int x,y,i,j;
       float *precompute;
       stbtt_vertex *verts;
@@ -4616,15 +4618,15 @@ STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float sc
             float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y;
             float x1 = verts[j].x*scale_x, y1 = verts[j].y*scale_y;
             float dist = (float) STBTT_sqrt((x1-x0)*(x1-x0) + (y1-y0)*(y1-y0));
-            precompute[i] = (dist == 0) ? 0.0f : 1.0f / dist;
+            precompute[i] = (dist < eps) ? 0.0f : 1.0f / dist;
          } else if (verts[i].type == STBTT_vcurve) {
             float x2 = verts[j].x *scale_x, y2 = verts[j].y *scale_y;
             float x1 = verts[i].cx*scale_x, y1 = verts[i].cy*scale_y;
             float x0 = verts[i].x *scale_x, y0 = verts[i].y *scale_y;
             float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2;
             float len2 = bx*bx + by*by;
-            if (len2 != 0.0f)
-               precompute[i] = 1.0f / (bx*bx + by*by);
+            if (len2 >= eps2)
+               precompute[i] = 1.0f / len2;
             else
                precompute[i] = 0.0f;
          } else
@@ -4689,8 +4691,8 @@ STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float sc
                         float a = 3*(ax*bx + ay*by);
                         float b = 2*(ax*ax + ay*ay) + (mx*bx+my*by);
                         float c = mx*ax+my*ay;
-                        if (a == 0.0) { // if a is 0, it's linear
-                           if (b != 0.0) {
+                        if (STBTT_fabs(a) < eps2) { // if a is 0, it's linear
+                           if (STBTT_fabs(b) >= eps2) {
                               res[num++] = -c/b;
                            }
                         } else {

external/stb/stb/tests/stb.dsp

@@ -130,6 +130,10 @@ SOURCE=..\stb_image.h
 # End Source File
 # Begin Source File
 
+SOURCE=..\stb_image_resize2.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\stb_image_write.h
 # End Source File
 # Begin Source File

external/stb/stb/tests/test_vorbis.c

@@ -8,7 +8,7 @@ extern void stb_vorbis_dumpmem(void);
 int main(int argc, char **argv)
 {
    size_t memlen;
-   unsigned char *mem = stb_fileu("c:/x/sketch008.ogg", &memlen);
+   unsigned char *mem = stb_fileu("../../lib/vorbis/sample/sketch008.ogg", &memlen);
    int chan, samplerate;
    short *output;
    int samples = stb_vorbis_decode_memory(mem, memlen, &chan, &samplerate, &output);