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tweaks to previous merge

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This commit is contained in:
Sean Barrett 2017-03-18 18:15:41 -07:00
parent 00c2545510
commit 6d60610348
1 changed files with 5 additions and 6 deletions
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11
stb_image.h
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@ -1693,7 +1693,7 @@ typedef struct
int succ_low;
int eob_run;
int jfif;
int app14;
int app14_color_transform; // Adobe APP14 tag
int rgb;
int scan_n, order[4];
@ -2862,9 +2862,8 @@ static int stbi__process_marker(stbi__jpeg *z, int m)
if (stbi__get8(z->s) != tag[i])
ok = 0;
L -= 5;
if (ok) {
if (ok)
z->jfif = 1;
}
} else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
int ok = 1;
@ -2877,7 +2876,7 @@ static int stbi__process_marker(stbi__jpeg *z, int m)
stbi__get8(z->s); // version
stbi__get16be(z->s); // flags0
stbi__get16be(z->s); // flags1
z->app14 = stbi__get8(z->s); // color transform
z->app14_color_transform = stbi__get8(z->s); // color transform
L -= 6;
}
}
@ -3047,7 +3046,7 @@ static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
{
int m;
z->jfif = 0;
z->app14 = -1;
z->app14_color_transform = -1; // valid values are 0,1,2
z->marker = STBI__MARKER_none; // initialize cached marker to empty
m = stbi__get_marker(z);
if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
@ -3531,7 +3530,7 @@ static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp
// determine actual number of components to generate
n = req_comp ? req_comp : z->s->img_n;
is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14 == 0 && !z->jfif));
is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
if (z->s->img_n == 3 && n < 3 && !is_rgb)
decode_n = 1;