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Use 64 byte aligned memory for cairo surface buffer

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Kovid Goyal 2025-02-02 09:37:38 +05:30
parent 4e06e0a8fc
commit 02a88b2803
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GPG key ID: 06BC317B515ACE7C
1 changed files with 7 additions and 2 deletions
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9
kitty/freetype.c
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@ -769,8 +769,13 @@ ensure_cairo_resources(Face *self, size_t width, size_t height) {
free_cairo_surface_data(self);
self->cairo.width = 0; self->cairo.height = 0;
self->cairo.stride = stride;
self->cairo.buf = malloc(self->cairo.stride * height);
if (!self->cairo.buf) { PyErr_NoMemory(); return false; }
int ret = posix_memalign(&self->cairo.buf, 64, self->cairo.stride * height);
switch (ret) {
case 0: break;
case ENOMEM: PyErr_NoMemory(); return false;
case EINVAL: PyErr_SetString(FreeType_Exception, "Invalid alignment for cairo surface buffer: 64"); return false;
default: PyErr_SetString(FreeType_Exception, "Unknown error when calling posix_memalign to create ciro surface buffer"); return false;
}
self->cairo.surface = cairo_image_surface_create_for_data(self->cairo.buf, CAIRO_FORMAT_ARGB32, width, height, self->cairo.stride);
if (!self->cairo.surface) { PyErr_NoMemory(); return false; }
self->cairo.cr = cairo_create(self->cairo.surface);