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Code-style consistency improvement:

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Apply clang-format-all.sh using the _clang-format file through all the cpp/.h files.
make sure not to apply it to certain serialization structures, since some parser expects the * as part of the name, instead of type.
This commit contains no other changes aside from adding and applying clang-format-all.sh
This commit is contained in:
erwincoumans
2018-09-23 14:17:31 -07:00
parent b73b05e9fb
commit ab8f16961e
1773 changed files with 1081087 additions and 474249 deletions
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766
examples/ThirdPartyLibs/stb_image/stb_image_write.h
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@@ -55,18 +55,19 @@ USAGE:
#define INCLUDE_STB_IMAGE_WRITE_H
#ifdef __cplusplus
extern "C" {
extern "C"
{
#endif
extern int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes);
extern int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data);
extern int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data);
extern int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes);
extern int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data);
extern int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data);
#ifdef __cplusplus
}
#endif
#endif//INCLUDE_STB_IMAGE_WRITE_H
#endif //INCLUDE_STB_IMAGE_WRITE_H
#ifdef STB_IMAGE_WRITE_IMPLEMENTATION
@@ -77,432 +78,525 @@ extern int stbi_write_tga(char const *filename, int w, int h, int comp, const vo
#include <assert.h>
typedef unsigned int stbiw_uint32;
typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1];
typedef int stb_image_write_test[sizeof(stbiw_uint32) == 4 ? 1 : -1];
static void writefv(FILE *f, const char *fmt, va_list v)
{
while (*fmt) {
switch (*fmt++) {
case ' ': break;
case '1': { unsigned char x = (unsigned char) va_arg(v, int); fputc(x,f); break; }
case '2': { int x = va_arg(v,int); unsigned char b[2];
b[0] = (unsigned char) x; b[1] = (unsigned char) (x>>8);
fwrite(b,2,1,f); break; }
case '4': { stbiw_uint32 x = va_arg(v,int); unsigned char b[4];
b[0]=(unsigned char)x; b[1]=(unsigned char)(x>>8);
b[2]=(unsigned char)(x>>16); b[3]=(unsigned char)(x>>24);
fwrite(b,4,1,f); break; }
default:
assert(0);
return;
}
}
while (*fmt)
{
switch (*fmt++)
{
case ' ':
break;
case '1':
{
unsigned char x = (unsigned char)va_arg(v, int);
fputc(x, f);
break;
}
case '2':
{
int x = va_arg(v, int);
unsigned char b[2];
b[0] = (unsigned char)x;
b[1] = (unsigned char)(x >> 8);
fwrite(b, 2, 1, f);
break;
}
case '4':
{
stbiw_uint32 x = va_arg(v, int);
unsigned char b[4];
b[0] = (unsigned char)x;
b[1] = (unsigned char)(x >> 8);
b[2] = (unsigned char)(x >> 16);
b[3] = (unsigned char)(x >> 24);
fwrite(b, 4, 1, f);
break;
}
default:
assert(0);
return;
}
}
}
static void write3(FILE *f, unsigned char a, unsigned char b, unsigned char c)
{
unsigned char arr[3];
arr[0] = a, arr[1] = b, arr[2] = c;
fwrite(arr, 3, 1, f);
unsigned char arr[3];
arr[0] = a, arr[1] = b, arr[2] = c;
fwrite(arr, 3, 1, f);
}
static void write_pixels(FILE *f, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad)
{
unsigned char bg[3] = { 255, 0, 255}, px[3];
stbiw_uint32 zero = 0;
int i,j,k, j_end;
unsigned char bg[3] = {255, 0, 255}, px[3];
stbiw_uint32 zero = 0;
int i, j, k, j_end;
if (y <= 0)
return;
if (y <= 0)
return;
if (vdir < 0)
j_end = -1, j = y-1;
else
j_end = y, j = 0;
if (vdir < 0)
j_end = -1, j = y - 1;
else
j_end = y, j = 0;
for (; j != j_end; j += vdir) {
for (i=0; i < x; ++i) {
unsigned char *d = (unsigned char *) data + (j*x+i)*comp;
if (write_alpha < 0)
fwrite(&d[comp-1], 1, 1, f);
switch (comp) {
case 1:
case 2: write3(f, d[0],d[0],d[0]);
break;
case 4:
if (!write_alpha) {
// composite against pink background
for (k=0; k < 3; ++k)
px[k] = bg[k] + ((d[k] - bg[k]) * d[3])/255;
write3(f, px[1-rgb_dir],px[1],px[1+rgb_dir]);
break;
}
/* FALLTHROUGH */
case 3:
write3(f, d[1-rgb_dir],d[1],d[1+rgb_dir]);
break;
}
if (write_alpha > 0)
fwrite(&d[comp-1], 1, 1, f);
}
fwrite(&zero,scanline_pad,1,f);
}
for (; j != j_end; j += vdir)
{
for (i = 0; i < x; ++i)
{
unsigned char *d = (unsigned char *)data + (j * x + i) * comp;
if (write_alpha < 0)
fwrite(&d[comp - 1], 1, 1, f);
switch (comp)
{
case 1:
case 2:
write3(f, d[0], d[0], d[0]);
break;
case 4:
if (!write_alpha)
{
// composite against pink background
for (k = 0; k < 3; ++k)
px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255;
write3(f, px[1 - rgb_dir], px[1], px[1 + rgb_dir]);
break;
}
/* FALLTHROUGH */
case 3:
write3(f, d[1 - rgb_dir], d[1], d[1 + rgb_dir]);
break;
}
if (write_alpha > 0)
fwrite(&d[comp - 1], 1, 1, f);
}
fwrite(&zero, scanline_pad, 1, f);
}
}
static int outfile(char const *filename, int rgb_dir, int vdir, int x, int y, int comp, void *data, int alpha, int pad, const char *fmt, ...)
{
FILE *f;
if (y < 0 || x < 0) return 0;
f = fopen(filename, "wb");
if (f) {
va_list v;
va_start(v, fmt);
writefv(f, fmt, v);
va_end(v);
write_pixels(f,rgb_dir,vdir,x,y,comp,data,alpha,pad);
fclose(f);
}
return f != NULL;
FILE *f;
if (y < 0 || x < 0) return 0;
f = fopen(filename, "wb");
if (f)
{
va_list v;
va_start(v, fmt);
writefv(f, fmt, v);
va_end(v);
write_pixels(f, rgb_dir, vdir, x, y, comp, data, alpha, pad);
fclose(f);
}
return f != NULL;
}
int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data)
{
int pad = (-x*3) & 3;
return outfile(filename,-1,-1,x,y,comp,(void *) data,0,pad,
"11 4 22 4" "4 44 22 444444",
'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header
40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header
int pad = (-x * 3) & 3;
return outfile(filename, -1, -1, x, y, comp, (void *)data, 0, pad,
"11 4 22 4"
"4 44 22 444444",
'B', 'M', 14 + 40 + (x * 3 + pad) * y, 0, 0, 14 + 40, // file header
40, x, y, 1, 24, 0, 0, 0, 0, 0, 0); // bitmap header
}
int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data)
{
int has_alpha = !(comp & 1);
return outfile(filename, -1,-1, x, y, comp, (void *) data, has_alpha, 0,
"111 221 2222 11", 0,0,2, 0,0,0, 0,0,x,y, 24+8*has_alpha, 8*has_alpha);
int has_alpha = !(comp & 1);
return outfile(filename, -1, -1, x, y, comp, (void *)data, has_alpha, 0,
"111 221 2222 11", 0, 0, 2, 0, 0, 0, 0, 0, x, y, 24 + 8 * has_alpha, 8 * has_alpha);
}
// stretchy buffer; stbi__sbpush() == vector<>::push_back() -- stbi__sbcount() == vector<>::size()
#define stbi__sbraw(a) ((int *) (a) - 2)
#define stbi__sbm(a) stbi__sbraw(a)[0]
#define stbi__sbn(a) stbi__sbraw(a)[1]
#define stbi__sbraw(a) ((int *)(a)-2)
#define stbi__sbm(a) stbi__sbraw(a)[0]
#define stbi__sbn(a) stbi__sbraw(a)[1]
#define stbi__sbneedgrow(a,n) ((a)==0 || stbi__sbn(a)+n >= stbi__sbm(a))
#define stbi__sbmaybegrow(a,n) (stbi__sbneedgrow(a,(n)) ? stbi__sbgrow(a,n) : 0)
#define stbi__sbgrow(a,n) stbi__sbgrowf((void **) &(a), (n), sizeof(*(a)))
#define stbi__sbneedgrow(a, n) ((a) == 0 || stbi__sbn(a) + n >= stbi__sbm(a))
#define stbi__sbmaybegrow(a, n) (stbi__sbneedgrow(a, (n)) ? stbi__sbgrow(a, n) : 0)
#define stbi__sbgrow(a, n) stbi__sbgrowf((void **)&(a), (n), sizeof(*(a)))
#define stbi__sbpush(a, v) (stbi__sbmaybegrow(a,1), (a)[stbi__sbn(a)++] = (v))
#define stbi__sbcount(a) ((a) ? stbi__sbn(a) : 0)
#define stbi__sbfree(a) ((a) ? free(stbi__sbraw(a)),0 : 0)
#define stbi__sbpush(a, v) (stbi__sbmaybegrow(a, 1), (a)[stbi__sbn(a)++] = (v))
#define stbi__sbcount(a) ((a) ? stbi__sbn(a) : 0)
#define stbi__sbfree(a) ((a) ? free(stbi__sbraw(a)), 0 : 0)
static void *stbi__sbgrowf(void **arr, int increment, int itemsize)
{
int m = *arr ? 2*stbi__sbm(*arr)+increment : increment+1;
void *p = realloc(*arr ? stbi__sbraw(*arr) : 0, itemsize * m + sizeof(int)*2);
assert(p);
if (p) {
if (!*arr) ((int *) p)[1] = 0;
*arr = (void *) ((int *) p + 2);
stbi__sbm(*arr) = m;
}
return *arr;
int m = *arr ? 2 * stbi__sbm(*arr) + increment : increment + 1;
void *p = realloc(*arr ? stbi__sbraw(*arr) : 0, itemsize * m + sizeof(int) * 2);
assert(p);
if (p)
{
if (!*arr) ((int *)p)[1] = 0;
*arr = (void *)((int *)p + 2);
stbi__sbm(*arr) = m;
}
return *arr;
}
static unsigned char *stbi__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount)
{
while (*bitcount >= 8) {
stbi__sbpush(data, (unsigned char) *bitbuffer);
*bitbuffer >>= 8;
*bitcount -= 8;
}
return data;
while (*bitcount >= 8)
{
stbi__sbpush(data, (unsigned char)*bitbuffer);
*bitbuffer >>= 8;
*bitcount -= 8;
}
return data;
}
static int stbi__zlib_bitrev(int code, int codebits)
{
int res=0;
while (codebits--) {
res = (res << 1) | (code & 1);
code >>= 1;
}
return res;
int res = 0;
while (codebits--)
{
res = (res << 1) | (code & 1);
code >>= 1;
}
return res;
}
static unsigned int stbi__zlib_countm(unsigned char *a, unsigned char *b, int limit)
{
int i;
for (i=0; i < limit && i < 258; ++i)
if (a[i] != b[i]) break;
return i;
int i;
for (i = 0; i < limit && i < 258; ++i)
if (a[i] != b[i]) break;
return i;
}
static unsigned int stbi__zhash(unsigned char *data)
{
stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16);
hash ^= hash << 3;
hash += hash >> 5;
hash ^= hash << 4;
hash += hash >> 17;
hash ^= hash << 25;
hash += hash >> 6;
return hash;
stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16);
hash ^= hash << 3;
hash += hash >> 5;
hash ^= hash << 4;
hash += hash >> 17;
hash ^= hash << 25;
hash += hash >> 6;
return hash;
}
#define stbi__zlib_flush() (out = stbi__zlib_flushf(out, &bitbuf, &bitcount))
#define stbi__zlib_add(code,codebits) \
(bitbuf |= (code) << bitcount, bitcount += (codebits), stbi__zlib_flush())
#define stbi__zlib_huffa(b,c) stbi__zlib_add(stbi__zlib_bitrev(b,c),c)
#define stbi__zlib_add(code, codebits) \
(bitbuf |= (code) << bitcount, bitcount += (codebits), stbi__zlib_flush())
#define stbi__zlib_huffa(b, c) stbi__zlib_add(stbi__zlib_bitrev(b, c), c)
// default huffman tables
#define stbi__zlib_huff1(n) stbi__zlib_huffa(0x30 + (n), 8)
#define stbi__zlib_huff2(n) stbi__zlib_huffa(0x190 + (n)-144, 9)
#define stbi__zlib_huff3(n) stbi__zlib_huffa(0 + (n)-256,7)
#define stbi__zlib_huff4(n) stbi__zlib_huffa(0xc0 + (n)-280,8)
#define stbi__zlib_huff(n) ((n) <= 143 ? stbi__zlib_huff1(n) : (n) <= 255 ? stbi__zlib_huff2(n) : (n) <= 279 ? stbi__zlib_huff3(n) : stbi__zlib_huff4(n))
#define stbi__zlib_huff1(n) stbi__zlib_huffa(0x30 + (n), 8)
#define stbi__zlib_huff2(n) stbi__zlib_huffa(0x190 + (n)-144, 9)
#define stbi__zlib_huff3(n) stbi__zlib_huffa(0 + (n)-256, 7)
#define stbi__zlib_huff4(n) stbi__zlib_huffa(0xc0 + (n)-280, 8)
#define stbi__zlib_huff(n) ((n) <= 143 ? stbi__zlib_huff1(n) : (n) <= 255 ? stbi__zlib_huff2(n) : (n) <= 279 ? stbi__zlib_huff3(n) : stbi__zlib_huff4(n))
#define stbi__zlib_huffb(n) ((n) <= 143 ? stbi__zlib_huff1(n) : stbi__zlib_huff2(n))
#define stbi__ZHASH 16384
#define stbi__ZHASH 16384
unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality)
unsigned char *stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality)
{
static unsigned short lengthc[] = { 3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258, 259 };
static unsigned char lengtheb[]= { 0,0,0,0,0,0,0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 };
static unsigned short distc[] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577, 32768 };
static unsigned char disteb[] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 };
unsigned int bitbuf=0;
int i,j, bitcount=0;
unsigned char *out = NULL;
unsigned char **hash_table[stbi__ZHASH]; // 64KB on the stack!
if (quality < 5) quality = 5;
static unsigned short lengthc[] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 259};
static unsigned char lengtheb[] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
static unsigned short distc[] = {1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577, 32768};
static unsigned char disteb[] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
unsigned int bitbuf = 0;
int i, j, bitcount = 0;
unsigned char *out = NULL;
unsigned char **hash_table[stbi__ZHASH]; // 64KB on the stack!
if (quality < 5) quality = 5;
stbi__sbpush(out, 0x78); // DEFLATE 32K window
stbi__sbpush(out, 0x5e); // FLEVEL = 1
stbi__zlib_add(1,1); // BFINAL = 1
stbi__zlib_add(1,2); // B3YPE = 1 -- fixed huffman
stbi__sbpush(out, 0x78); // DEFLATE 32K window
stbi__sbpush(out, 0x5e); // FLEVEL = 1
stbi__zlib_add(1, 1); // BFINAL = 1
stbi__zlib_add(1, 2); // B3YPE = 1 -- fixed huffman
for (i=0; i < stbi__ZHASH; ++i)
hash_table[i] = NULL;
for (i = 0; i < stbi__ZHASH; ++i)
hash_table[i] = NULL;
i=0;
while (i < data_len-3) {
// hash next 3 bytes of data to be compressed
int h = stbi__zhash(data+i)&(stbi__ZHASH-1), best=3;
unsigned char *bestloc = 0;
unsigned char **hlist = hash_table[h];
int n = stbi__sbcount(hlist);
for (j=0; j < n; ++j) {
if (hlist[j]-data > i-32768) { // if entry lies within window
int d = stbi__zlib_countm(hlist[j], data+i, data_len-i);
if (d >= best) best=d,bestloc=hlist[j];
}
}
// when hash table entry is too long, delete half the entries
if (hash_table[h] && stbi__sbn(hash_table[h]) == 2*quality) {
memcpy(hash_table[h], hash_table[h]+quality, sizeof(hash_table[h][0])*quality);
stbi__sbn(hash_table[h]) = quality;
}
stbi__sbpush(hash_table[h],data+i);
i = 0;
while (i < data_len - 3)
{
// hash next 3 bytes of data to be compressed
int h = stbi__zhash(data + i) & (stbi__ZHASH - 1), best = 3;
unsigned char *bestloc = 0;
unsigned char **hlist = hash_table[h];
int n = stbi__sbcount(hlist);
for (j = 0; j < n; ++j)
{
if (hlist[j] - data > i - 32768)
{ // if entry lies within window
int d = stbi__zlib_countm(hlist[j], data + i, data_len - i);
if (d >= best) best = d, bestloc = hlist[j];
}
}
// when hash table entry is too long, delete half the entries
if (hash_table[h] && stbi__sbn(hash_table[h]) == 2 * quality)
{
memcpy(hash_table[h], hash_table[h] + quality, sizeof(hash_table[h][0]) * quality);
stbi__sbn(hash_table[h]) = quality;
}
stbi__sbpush(hash_table[h], data + i);
if (bestloc) {
// "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal
h = stbi__zhash(data+i+1)&(stbi__ZHASH-1);
hlist = hash_table[h];
n = stbi__sbcount(hlist);
for (j=0; j < n; ++j) {
if (hlist[j]-data > i-32767) {
int e = stbi__zlib_countm(hlist[j], data+i+1, data_len-i-1);
if (e > best) { // if next match is better, bail on current match
bestloc = NULL;
break;
}
}
}
}
if (bestloc)
{
// "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal
h = stbi__zhash(data + i + 1) & (stbi__ZHASH - 1);
hlist = hash_table[h];
n = stbi__sbcount(hlist);
for (j = 0; j < n; ++j)
{
if (hlist[j] - data > i - 32767)
{
int e = stbi__zlib_countm(hlist[j], data + i + 1, data_len - i - 1);
if (e > best)
{ // if next match is better, bail on current match
bestloc = NULL;
break;
}
}
}
}
if (bestloc) {
int d = data+i - bestloc; // distance back
assert(d <= 32767 && best <= 258);
for (j=0; best > lengthc[j+1]-1; ++j);
stbi__zlib_huff(j+257);
if (lengtheb[j]) stbi__zlib_add(best - lengthc[j], lengtheb[j]);
for (j=0; d > distc[j+1]-1; ++j);
stbi__zlib_add(stbi__zlib_bitrev(j,5),5);
if (disteb[j]) stbi__zlib_add(d - distc[j], disteb[j]);
i += best;
} else {
stbi__zlib_huffb(data[i]);
++i;
}
}
// write out final bytes
for (;i < data_len; ++i)
stbi__zlib_huffb(data[i]);
stbi__zlib_huff(256); // end of block
// pad with 0 bits to byte boundary
while (bitcount)
stbi__zlib_add(0,1);
if (bestloc)
{
int d = data + i - bestloc; // distance back
assert(d <= 32767 && best <= 258);
for (j = 0; best > lengthc[j + 1] - 1; ++j)
;
stbi__zlib_huff(j + 257);
if (lengtheb[j]) stbi__zlib_add(best - lengthc[j], lengtheb[j]);
for (j = 0; d > distc[j + 1] - 1; ++j)
;
stbi__zlib_add(stbi__zlib_bitrev(j, 5), 5);
if (disteb[j]) stbi__zlib_add(d - distc[j], disteb[j]);
i += best;
}
else
{
stbi__zlib_huffb(data[i]);
++i;
}
}
// write out final bytes
for (; i < data_len; ++i)
stbi__zlib_huffb(data[i]);
stbi__zlib_huff(256); // end of block
// pad with 0 bits to byte boundary
while (bitcount)
stbi__zlib_add(0, 1);
for (i=0; i < stbi__ZHASH; ++i)
(void) stbi__sbfree(hash_table[i]);
for (i = 0; i < stbi__ZHASH; ++i)
(void)stbi__sbfree(hash_table[i]);
{
// compute adler32 on input
unsigned int i=0, s1=1, s2=0, blocklen = data_len % 5552;
int j=0;
while (j < data_len) {
for (i=0; i < blocklen; ++i) s1 += data[j+i], s2 += s1;
s1 %= 65521, s2 %= 65521;
j += blocklen;
blocklen = 5552;
}
stbi__sbpush(out, (unsigned char) (s2 >> 8));
stbi__sbpush(out, (unsigned char) s2);
stbi__sbpush(out, (unsigned char) (s1 >> 8));
stbi__sbpush(out, (unsigned char) s1);
}
*out_len = stbi__sbn(out);
// make returned pointer freeable
memmove(stbi__sbraw(out), out, *out_len);
return (unsigned char *) stbi__sbraw(out);
{
// compute adler32 on input
unsigned int i = 0, s1 = 1, s2 = 0, blocklen = data_len % 5552;
int j = 0;
while (j < data_len)
{
for (i = 0; i < blocklen; ++i) s1 += data[j + i], s2 += s1;
s1 %= 65521, s2 %= 65521;
j += blocklen;
blocklen = 5552;
}
stbi__sbpush(out, (unsigned char)(s2 >> 8));
stbi__sbpush(out, (unsigned char)s2);
stbi__sbpush(out, (unsigned char)(s1 >> 8));
stbi__sbpush(out, (unsigned char)s1);
}
*out_len = stbi__sbn(out);
// make returned pointer freeable
memmove(stbi__sbraw(out), out, *out_len);
return (unsigned char *)stbi__sbraw(out);
}
unsigned int stbi__crc32(unsigned char *buffer, int len)
{
static unsigned int crc_table[256];
unsigned int crc = ~0u;
int i,j;
if (crc_table[1] == 0)
for(i=0; i < 256; i++)
for (crc_table[i]=i, j=0; j < 8; ++j)
crc_table[i] = (crc_table[i] >> 1) ^ (crc_table[i] & 1 ? 0xedb88320 : 0);
for (i=0; i < len; ++i)
crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)];
return ~crc;
static unsigned int crc_table[256];
unsigned int crc = ~0u;
int i, j;
if (crc_table[1] == 0)
for (i = 0; i < 256; i++)
for (crc_table[i] = i, j = 0; j < 8; ++j)
crc_table[i] = (crc_table[i] >> 1) ^ (crc_table[i] & 1 ? 0xedb88320 : 0);
for (i = 0; i < len; ++i)
crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)];
return ~crc;
}
#define stbi__wpng4(o,a,b,c,d) ((o)[0]=(unsigned char)(a),(o)[1]=(unsigned char)(b),(o)[2]=(unsigned char)(c),(o)[3]=(unsigned char)(d),(o)+=4)
#define stbi__wp32(data,v) stbi__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v));
#define stbi__wptag(data,s) stbi__wpng4(data, s[0],s[1],s[2],s[3])
#define stbi__wpng4(o, a, b, c, d) ((o)[0] = (unsigned char)(a), (o)[1] = (unsigned char)(b), (o)[2] = (unsigned char)(c), (o)[3] = (unsigned char)(d), (o) += 4)
#define stbi__wp32(data, v) stbi__wpng4(data, (v) >> 24, (v) >> 16, (v) >> 8, (v));
#define stbi__wptag(data, s) stbi__wpng4(data, s[0], s[1], s[2], s[3])
static void stbi__wpcrc(unsigned char **data, int len)
{
unsigned int crc = stbi__crc32(*data - len - 4, len+4);
stbi__wp32(*data, crc);
unsigned int crc = stbi__crc32(*data - len - 4, len + 4);
stbi__wp32(*data, crc);
}
static unsigned char stbi__paeth(int a, int b, int c)
{
int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c);
if (pa <= pb && pa <= pc) return (unsigned char) a;
if (pb <= pc) return (unsigned char) b;
return (unsigned char) c;
int p = a + b - c, pa = abs(p - a), pb = abs(p - b), pc = abs(p - c);
if (pa <= pb && pa <= pc) return (unsigned char)a;
if (pb <= pc) return (unsigned char)b;
return (unsigned char)c;
}
unsigned char *stbi_write_png_to_mem(unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len)
{
int ctype[5] = { -1, 0, 4, 2, 6 };
unsigned char sig[8] = { 137,80,78,71,13,10,26,10 };
unsigned char *out,*o, *filt, *zlib;
signed char *line_buffer;
int i,j,k,p,zlen;
int ctype[5] = {-1, 0, 4, 2, 6};
unsigned char sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
unsigned char *out, *o, *filt, *zlib;
signed char *line_buffer;
int i, j, k, p, zlen;
if (stride_bytes == 0)
stride_bytes = x * n;
if (stride_bytes == 0)
stride_bytes = x * n;
filt = (unsigned char *) malloc((x*n+1) * y); if (!filt) return 0;
line_buffer = (signed char *) malloc(x * n); if (!line_buffer) { free(filt); return 0; }
for (j=0; j < y; ++j) {
static int mapping[] = { 0,1,2,3,4 };
static int firstmap[] = { 0,1,0,5,6 };
int *mymap = j ? mapping : firstmap;
int best = 0, bestval = 0x7fffffff;
for (p=0; p < 2; ++p) {
for (k= p?best:0; k < 5; ++k) {
int type = mymap[k],est=0;
unsigned char *z = pixels + stride_bytes*j;
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-stride_bytes]; break;
case 3: line_buffer[i] = z[i] - (z[i-stride_bytes]>>1); break;
case 4: line_buffer[i] = (signed char) (z[i] - stbi__paeth(0,z[i-stride_bytes],0)); break;
case 5: line_buffer[i] = z[i]; break;
case 6: line_buffer[i] = z[i]; break;
}
for (i=n; i < x*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-stride_bytes]; break;
case 3: line_buffer[i] = z[i] - ((z[i-n] + z[i-stride_bytes])>>1); break;
case 4: line_buffer[i] = z[i] - stbi__paeth(z[i-n], z[i-stride_bytes], z[i-stride_bytes-n]); break;
case 5: line_buffer[i] = z[i] - (z[i-n]>>1); break;
case 6: line_buffer[i] = z[i] - stbi__paeth(z[i-n], 0,0); break;
}
}
if (p) break;
for (i=0; i < x*n; ++i)
est += abs((signed char) line_buffer[i]);
if (est < bestval) { bestval = est; best = k; }
}
}
// when we get here, best contains the filter type, and line_buffer contains the data
filt[j*(x*n+1)] = (unsigned char) best;
memcpy(filt+j*(x*n+1)+1, line_buffer, x*n);
}
free(line_buffer);
zlib = stbi_zlib_compress(filt, y*( x*n+1), &zlen, 8); // increase 8 to get smaller but use more memory
free(filt);
if (!zlib) return 0;
filt = (unsigned char *)malloc((x * n + 1) * y);
if (!filt) return 0;
line_buffer = (signed char *)malloc(x * n);
if (!line_buffer)
{
free(filt);
return 0;
}
for (j = 0; j < y; ++j)
{
static int mapping[] = {0, 1, 2, 3, 4};
static int firstmap[] = {0, 1, 0, 5, 6};
int *mymap = j ? mapping : firstmap;
int best = 0, bestval = 0x7fffffff;
for (p = 0; p < 2; ++p)
{
for (k = p ? best : 0; k < 5; ++k)
{
int type = mymap[k], est = 0;
unsigned char *z = pixels + stride_bytes * j;
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 - stride_bytes];
break;
case 3:
line_buffer[i] = z[i] - (z[i - stride_bytes] >> 1);
break;
case 4:
line_buffer[i] = (signed char)(z[i] - stbi__paeth(0, z[i - stride_bytes], 0));
break;
case 5:
line_buffer[i] = z[i];
break;
case 6:
line_buffer[i] = z[i];
break;
}
for (i = n; i < x * 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 - stride_bytes];
break;
case 3:
line_buffer[i] = z[i] - ((z[i - n] + z[i - stride_bytes]) >> 1);
break;
case 4:
line_buffer[i] = z[i] - stbi__paeth(z[i - n], z[i - stride_bytes], z[i - stride_bytes - n]);
break;
case 5:
line_buffer[i] = z[i] - (z[i - n] >> 1);
break;
case 6:
line_buffer[i] = z[i] - stbi__paeth(z[i - n], 0, 0);
break;
}
}
if (p) break;
for (i = 0; i < x * n; ++i)
est += abs((signed char)line_buffer[i]);
if (est < bestval)
{
bestval = est;
best = k;
}
}
}
// when we get here, best contains the filter type, and line_buffer contains the data
filt[j * (x * n + 1)] = (unsigned char)best;
memcpy(filt + j * (x * n + 1) + 1, line_buffer, x * n);
}
free(line_buffer);
zlib = stbi_zlib_compress(filt, y * (x * n + 1), &zlen, 8); // increase 8 to get smaller but use more memory
free(filt);
if (!zlib) return 0;
// each tag requires 12 bytes of overhead
out = (unsigned char *) malloc(8 + 12+13 + 12+zlen + 12);
if (!out) return 0;
*out_len = 8 + 12+13 + 12+zlen + 12;
// each tag requires 12 bytes of overhead
out = (unsigned char *)malloc(8 + 12 + 13 + 12 + zlen + 12);
if (!out) return 0;
*out_len = 8 + 12 + 13 + 12 + zlen + 12;
o=out;
memcpy(o,sig,8); o+= 8;
stbi__wp32(o, 13); // header length
stbi__wptag(o, "IHDR");
stbi__wp32(o, x);
stbi__wp32(o, y);
*o++ = 8;
*o++ = (unsigned char) ctype[n];
*o++ = 0;
*o++ = 0;
*o++ = 0;
stbi__wpcrc(&o,13);
o = out;
memcpy(o, sig, 8);
o += 8;
stbi__wp32(o, 13); // header length
stbi__wptag(o, "IHDR");
stbi__wp32(o, x);
stbi__wp32(o, y);
*o++ = 8;
*o++ = (unsigned char)ctype[n];
*o++ = 0;
*o++ = 0;
*o++ = 0;
stbi__wpcrc(&o, 13);
stbi__wp32(o, zlen);
stbi__wptag(o, "IDAT");
memcpy(o, zlib, zlen); o += zlen; free(zlib);
stbi__wpcrc(&o, zlen);
stbi__wp32(o, zlen);
stbi__wptag(o, "IDAT");
memcpy(o, zlib, zlen);
o += zlen;
free(zlib);
stbi__wpcrc(&o, zlen);
stbi__wp32(o,0);
stbi__wptag(o, "IEND");
stbi__wpcrc(&o,0);
stbi__wp32(o, 0);
stbi__wptag(o, "IEND");
stbi__wpcrc(&o, 0);
assert(o == out + *out_len);
assert(o == out + *out_len);
return out;
return out;
}
int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes)
{
FILE *f;
int len;
unsigned char *png = stbi_write_png_to_mem((unsigned char *) data, stride_bytes, x, y, comp, &len);
if (!png) return 0;
f = fopen(filename, "wb");
if (!f) {
free(png);
return 0;
}
fwrite(png, 1, len, f);
fclose(f);
free(png);
return 1;
FILE *f;
int len;
unsigned char *png = stbi_write_png_to_mem((unsigned char *)data, stride_bytes, x, y, comp, &len);
if (!png) return 0;
f = fopen(filename, "wb");
if (!f)
{
free(png);
return 0;
}
fwrite(png, 1, len, f);
fclose(f);
free(png);
return 1;
}
#endif // STB_IMAGE_WRITE_IMPLEMENTATION
#endif // STB_IMAGE_WRITE_IMPLEMENTATION
/* Revision history