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Set unused bytes to zero

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This commit is contained in:
Andrew Murray 2023-07-11 19:17:58 +10:00
parent 7a1e28404d
commit 040a86d11c
1 changed files with 18 additions and 13 deletions
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31
src/libImaging/Convert.c
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@ -119,8 +119,8 @@ lA2la(UINT8 *out, const UINT8 *in, int xsize) {
alpha = in[3]; alpha = in[3];
pixel = MULDIV255(in[0], alpha, tmp); pixel = MULDIV255(in[0], alpha, tmp);
*out++ = (UINT8)pixel; *out++ = (UINT8)pixel;
*out++ = (UINT8)pixel; *out++ = 0;
*out++ = (UINT8)pixel; *out++ = 0;
*out++ = (UINT8)alpha; *out++ = (UINT8)alpha;
} }
} }
@ -139,8 +139,8 @@ la2lA(UINT8 *out, const UINT8 *in, int xsize) {
pixel = CLIP8((255 * in[0]) / alpha); pixel = CLIP8((255 * in[0]) / alpha);
} }
*out++ = (UINT8)pixel; *out++ = (UINT8)pixel;
*out++ = (UINT8)pixel; *out++ = 0;
*out++ = (UINT8)pixel; *out++ = 0;
*out++ = (UINT8)alpha; *out++ = (UINT8)alpha;
} }
} }
@ -151,8 +151,8 @@ l2la(UINT8 *out, const UINT8 *in, int xsize) {
for (x = 0; x < xsize; x++) { for (x = 0; x < xsize; x++) {
UINT8 v = *in++; UINT8 v = *in++;
*out++ = v; *out++ = v;
*out++ = v; *out++ = 0;
*out++ = v; *out++ = 0;
*out++ = 255; *out++ = 255;
} }
} }
@ -236,7 +236,8 @@ rgb2la(UINT8 *out, const UINT8 *in, int xsize) {
int x; int x;
for (x = 0; x < xsize; x++, in += 4, out += 4) { for (x = 0; x < xsize; x++, in += 4, out += 4) {
/* ITU-R Recommendation 601-2 (assuming nonlinear RGB) */ /* ITU-R Recommendation 601-2 (assuming nonlinear RGB) */
out[0] = out[1] = out[2] = L24(in) >> 16; out[0] = L24(in) >> 16;
out[1] = out[2] = 0;
out[3] = 255; out[3] = 255;
} }
} }
@ -428,7 +429,8 @@ rgba2la(UINT8 *out, const UINT8 *in, int xsize) {
int x; int x;
for (x = 0; x < xsize; x++, in += 4, out += 4) { for (x = 0; x < xsize; x++, in += 4, out += 4) {
/* ITU-R Recommendation 601-2 (assuming nonlinear RGB) */ /* ITU-R Recommendation 601-2 (assuming nonlinear RGB) */
out[0] = out[1] = out[2] = L24(in) >> 16; out[0] = L24(in) >> 16;
out[1] = out[2] = 0;
out[3] = in[3]; out[3] = in[3];
} }
} }
@ -767,7 +769,8 @@ static void
ycbcr2la(UINT8 *out, const UINT8 *in, int xsize) { ycbcr2la(UINT8 *out, const UINT8 *in, int xsize) {
int x; int x;
for (x = 0; x < xsize; x++, in += 4, out += 4) { for (x = 0; x < xsize; x++, in += 4, out += 4) {
out[0] = out[1] = out[2] = in[0]; out[0] = in[0];
out[1] = out[2] = 0;
out[3] = 255; out[3] = 255;
} }
} }
@ -1061,8 +1064,8 @@ p2pa(UINT8 *out, const UINT8 *in, int xsize, ImagingPalette palette) {
for (x = 0; x < xsize; x++, in++) { for (x = 0; x < xsize; x++, in++) {
const UINT8 *rgba = &palette->palette[in[0] * 4]; const UINT8 *rgba = &palette->palette[in[0] * 4];
*out++ = in[0]; *out++ = in[0];
*out++ = in[0]; *out++ = 0;
*out++ = in[0]; *out++ = 0;
*out++ = rgb == 0 ? 255 : rgba[3]; *out++ = rgb == 0 ? 255 : rgba[3];
} }
} }
@ -1073,7 +1076,8 @@ p2la(UINT8 *out, const UINT8 *in, int xsize, ImagingPalette palette) {
/* FIXME: precalculate greyscale palette? */ /* FIXME: precalculate greyscale palette? */
for (x = 0; x < xsize; x++, out += 4) { for (x = 0; x < xsize; x++, out += 4) {
const UINT8 *rgba = &palette->palette[*in++ * 4]; const UINT8 *rgba = &palette->palette[*in++ * 4];
out[0] = out[1] = out[2] = L24(rgba) >> 16; out[0] = L24(rgba) >> 16;
out[1] = out[2] = 0;
out[3] = rgba[3]; out[3] = rgba[3];
} }
} }
@ -1083,7 +1087,8 @@ pa2la(UINT8 *out, const UINT8 *in, int xsize, ImagingPalette palette) {
int x; int x;
/* FIXME: precalculate greyscale palette? */ /* FIXME: precalculate greyscale palette? */
for (x = 0; x < xsize; x++, in += 4, out += 4) { for (x = 0; x < xsize; x++, in += 4, out += 4) {
out[0] = out[1] = out[2] = L24(&palette->palette[in[0] * 4]) >> 16; out[0] = L24(&palette->palette[in[0] * 4]) >> 16;
out[1] = out[2] = 0;
out[3] = in[3]; out[3] = in[3];
} }
} }