mirrors/fltk
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fl_Cairo_Graphics_Driver: fix Fl_Bitmap drawing whatever the endianness.

Browse Source
This commit is contained in:
ManoloFLTK 2022-10-10 11:31:02 +02:00
parent 7fa677f93e
commit e4709b837d
1 changed files with 30 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
src/drivers/Cairo/Fl_Cairo_Graphics_Driver.cxx
View File

@ -898,24 +898,41 @@ cairo_pattern_t *Fl_Cairo_Graphics_Driver::bitmap_to_pattern(Fl_Bitmap *bm,
uchar *BGRA = new uchar[stride * bm->data_h()];
memset(BGRA, 0, stride * bm->data_h());
for (int j = 0; j < bm->data_h(); j++) {
uchar *r = (uchar*)bm->array + j * w_bitmap;
unsigned *q = (unsigned*)(BGRA + j * stride);
unsigned k = 0, mask32 = 1;
uchar p = *r;
if (complement) p = ~p;
uchar *r = (uchar *)bm->array + j * w_bitmap;
uint32_t *q = (uint32_t *)(BGRA + j * stride);
int k = 0;
uint32_t mask32;
uchar p;
for (int i = 0; i < bm->data_w(); i++) {
if (p&1) (*q) |= mask32;
k++;
if (k % 8 != 0) p >>= 1;
else {
p = *(++r);
if (complement) p = ~p;
if (k == 0) {
#if WORDS_BIGENDIAN
mask32 = (uint32_t)(1 << 31);
#else
mask32 = 1;
#endif
}
if ((k & 7) == 0) { // (k & 7) == (k % 8)
p = *r++;
if (complement)
p = ~p;
}
if (p & 1)
(*q) |= mask32;
k++;
p >>= 1;
#if WORDS_BIGENDIAN
mask32 >>= 1;
#else
mask32 <<= 1;
#endif
if (k == 32) {
k = 0;
q++;
}
if (k % 32 != 0) mask32 <<= 1; else {q++; mask32 = 1;}
}
}
cairo_surface_t *surf = cairo_image_surface_create_for_data(BGRA, CAIRO_FORMAT_A1, bm->data_w(), bm->data_h(), stride);
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(surf);
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(surf);
if (p_surface) *p_surface = surf;
else cairo_surface_destroy(surf);
return pattern;