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const c = @cImport({
@cInclude("pango/pangocairo.h");
});
pub const pango = struct {
pub const scale = c.PANGO_SCALE;
pub const Layout = opaque {
extern fn pango_cairo_create_layout(s: *cairo.Context) ?*Layout;
pub fn createForCairo(s: *cairo.Context) !*Layout {
return pango_cairo_create_layout(s) orelse return error.OutOfMemory;
}
extern fn pango_layout_set_font_description(l: *Layout, f: *FontDescription) void;
pub const setFontDescription = pango_layout_set_font_description;
extern fn pango_layout_set_text(l: *Layout, text: [*:0]const u8, len: i32) void;
pub const setText = pango_layout_set_text;
pub fn unref(l: *Layout) void {
c.g_object_unref(l);
}
};
pub const FontDescription = opaque {
extern fn pango_font_description_new() ?*FontDescription;
pub fn create() !*FontDescription {
return pango_font_description_new() orelse return error.OutOfMemory;
}
extern fn pango_font_description_from_string(str: [*:0]const u8) ?*FontDescription;
pub fn fromString(str: [*:0]const u8) !*FontDescription {
return c.pango_font_description_from_string(str) orelse return error.OutOfMemory;
}
extern fn pango_font_description_set_family(
f: *FontDescription,
name: [*:0]const u8,
) void;
pub const setFamily = pango_font_description_set_family;
extern fn pango_font_description_set_weight(f: *FontDescription, weight: u32) void;
pub const setWeight = pango_font_description_set_weight;
extern fn pango_font_description_set_size(f: *FontDescription, size: i32) void;
pub const setSize = pango_font_description_set_size;
pub fn setSizePt(f: *FontDescription, pt: i32) void {
f.setSize(pt * scale);
}
extern fn pango_font_description_free(f: *FontDescription) void;
pub const destroy = pango_font_description_free;
};
};
pub const cairo = struct {
pub const Error = error{
Unknown,
NullPtr,
NoMemory,
ReadError,
InvalidContent,
InvalidFormat,
InvalidVisual,
};
fn statusToError(status: c_int) Error!void {
switch (status) {
c.CAIRO_STATUS_SUCCESS => return,
c.CAIRO_STATUS_NULL_POINTER => return Error.NullPtr,
c.CAIRO_STATUS_NO_MEMORY => return Error.NoMemory,
c.CAIRO_STATUS_READ_ERROR => return Error.ReadError,
c.CAIRO_STATUS_INVALID_CONTENT => return Error.InvalidContent,
c.CAIRO_STATUS_INVALID_FORMAT => return Error.InvalidFormat,
c.CAIRO_STATUS_INVALID_VISUAL => return Error.InvalidVisual,
else => return Error.Unknown,
}
}
pub const Format = enum(c_int) {
invalid = -1,
argb32,
rgb24,
extern fn cairo_format_stride_for_width(format: Format, width: i32) i32;
pub const strideForWidth = cairo_format_stride_for_width;
};
pub const Context = opaque {
extern fn cairo_status(ctx: ?*Context) c_int;
fn checkStatus(ctx: ?*Context) Error!void {
return statusToError(cairo_status(ctx));
}
extern fn cairo_create(surface: *Surface) ?*Context;
pub fn create(surface: *Surface) !*Context {
const ctx = cairo_create(surface);
try checkStatus(ctx);
return ctx orelse unreachable;
}
extern fn cairo_move_to(ctx: *Context, x: f64, y: f64) void;
pub const moveTo = cairo_move_to;
extern fn cairo_set_source_rgba(ctx: *Context, green: f64, blue: f64, red: f64, alpha: f64) void;
pub const setSourceRgba = cairo_set_source_rgba;
extern fn cairo_paint(ctx: *Context) void;
pub const paint = cairo_paint;
extern fn pango_cairo_show_layout(ctx: *Context, layout: *pango.Layout) void;
pub const showPangoLayout = pango_cairo_show_layout;
extern fn cairo_destroy(ctx: *Context) void;
pub const destroy = cairo_destroy;
};
pub const Surface = opaque {
extern fn cairo_surface_status(surface: ?*Surface) c_int;
fn checkStatus(surface: ?*Surface) Error!void {
return statusToError(cairo_surface_status(surface));
}
extern fn cairo_image_surface_create(
format: Format,
width: i32,
height: i32,
) ?*Surface;
pub fn createImage(format: Format, width: i32, height: i32) Error!*Surface {
const surface = cairo_image_surface_create(
format,
width,
height,
);
try checkStatus(surface);
return surface orelse unreachable;
}
extern fn cairo_image_surface_create_for_data(
data: [*c]u8,
format: Format,
width: i32,
height: i32,
stride: i32,
) ?*Surface;
pub fn createImageForData(
data: []u8,
format: Format,
width: i32,
height: i32,
stride: i32,
) Error!*Surface {
const s = cairo_image_surface_create_for_data(
data.ptr,
format,
width,
height,
stride,
);
try checkStatus(s);
return s orelse unreachable;
}
extern fn cairo_surface_destroy(s: *Surface) void;
pub const destroy = cairo_surface_destroy;
};
};
|
