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Add support for images that has no alpha channel #3

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Add support for images that has no alpha channel #3

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19 changes: 11 additions & 8 deletions loader_heic.c
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Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,8 @@ char load(ImlibImage * im, ImlibProgressFunction progress,
{

int w,h;
int y=0;
int x=0,y=0;
int alpha;

char retcode = 0;
struct heif_context *ctx = heif_context_alloc();
Expand Down Expand Up @@ -81,6 +82,7 @@ char load(ImlibImage * im, ImlibProgressFunction progress,

w = heif_image_handle_get_width(imh);
h = heif_image_handle_get_height(imh);
alpha = heif_image_handle_has_alpha_channel(imh);

im->w = w;
im->h = h;
Expand Down Expand Up @@ -120,14 +122,15 @@ char load(ImlibImage * im, ImlibProgressFunction progress,
bgra = (uint8_t*)malloc(4 * w * h);
if (!bgra) goto EXIT;

int channel = alpha ? 4 : 3;

for (y = 0; y < h; ++y) {
int x;
for (x=0; x < w; ++x) {
bgra[4*(y*w + x) + 0] = plane[y*stride + 4*x + 2];
bgra[4*(y*w + x) + 1] = plane[y*stride + 4*x + 1];
bgra[4*(y*w + x) + 2] = plane[y*stride + 4*x + 0];
bgra[4*(y*w + x) + 3] = plane[y*stride + 4*x + 3];
}
for (x = 0; x < w; ++x) {
bgra[4 * (y * w + x) + 0] = plane[y * stride + channel * x + 2];
bgra[4 * (y * w + x) + 1] = plane[y * stride + channel * x + 1];
bgra[4 * (y * w + x) + 2] = plane[y * stride + channel * x + 0];
bgra[4 * (y * w + x) + 3] = alpha ? plane[y * stride + channel * x + 3] : 255;
}
}

im->data = (DATA32*)bgra;
Expand Down