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pkg/pixman: more image APIs

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This commit is contained in:
Mitchell Hashimoto
2022-11-25 11:34:31 -08:00
parent 72cd107e6a
commit 336d2c4e13
1 changed files with 27 additions and 0 deletions
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27
pkg/pixman/image.zig
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@ -23,6 +23,30 @@ pub const Image = opaque {
return c.pixman_image_unref(@ptrCast(*c.pixman_image_t, self)) == 1;
}
/// A variant of getDataUnsafe that sets the length of the slice to
/// height * stride. Its possible the buffer is larger but this is the
/// known safe values. If you KNOW the buffer is larger you can use the
/// unsafe variant.
pub fn getData(self: *Image) []u32 {
const height = self.getHeight();
const stride = self.getStride();
const ptr = self.getDataUnsafe();
const len = @intCast(usize, height * stride);
return ptr[0..len];
}
pub fn getDataUnsafe(self: *Image) [*]u32 {
return c.pixman_image_get_data(@ptrCast(*c.pixman_image_t, self));
}
pub fn getHeight(self: *Image) c_int {
return c.pixman_image_get_height(@ptrCast(*c.pixman_image_t, self));
}
pub fn getStride(self: *Image) c_int {
return c.pixman_image_get_stride(@ptrCast(*c.pixman_image_t, self));
}
pub fn fillBoxes(
self: *Image,
op: pixman.Op,
@ -53,6 +77,9 @@ test "create and destroy" {
defer alloc.free(data);
std.mem.set(u32, data, 0);
const img = try Image.createBitsNoClear(.g1, width, height, data.ptr, stride);
try testing.expectEqual(@as(c_int, height), img.getHeight());
try testing.expectEqual(@as(c_int, stride), img.getStride());
try testing.expect(img.getData().len == height * stride);
try testing.expect(img.unref());
}