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Extend MakeARGB32() to accept Alpha channel.

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Change-Id: I31b8e2d085000e2e3687a373401e4f655f11fc42
This commit is contained in:
Vikas Arora 2014-07-21 14:48:22 -07:00
parent 4595b62b7c
commit d2cc61b7dd
1 changed files with 4 additions and 10 deletions
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14
src/enc/picture_csp.c
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@ -28,8 +28,8 @@ static const union {
} test_endian = { 0xff000000u };
#define ALPHA_IS_LAST (test_endian.bytes[3] == 0xff)
static WEBP_INLINE uint32_t MakeARGB32(int r, int g, int b) {
return (0xff000000u | (r << 16) | (g << 8) | b);
static WEBP_INLINE uint32_t MakeARGB32(int a, int r, int g, int b) {
return (((uint32_t)a << 24) | (r << 16) | (g << 8) | b);
}
//------------------------------------------------------------------------------
@ -353,14 +353,8 @@ static int Import(WebPPicture* const picture,
int x;
for (x = 0; x < width; ++x) {
const int offset = step * x + y * rgb_stride;
if (!import_alpha) {
dst[x] = MakeARGB32(r_ptr[offset], g_ptr[offset], b_ptr[offset]);
} else {
dst[x] = ((uint32_t)a_ptr[offset] << 24) |
(r_ptr[offset] << 16) |
(g_ptr[offset] << 8) |
(b_ptr[offset]);
}
dst[x] = MakeARGB32(import_alpha ? a_ptr[offset] : 0xff,
r_ptr[offset], g_ptr[offset], b_ptr[offset]);
}
}
return 1;