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make go-cairo compile with cairo versions older than 1.16 #31

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merged 2 commits into from
Mar 4, 2024
Merged

make go-cairo compile with cairo versions older than 1.16 #31

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142d738
make go-cairo compile with cairo versions older than 1.16
pebbe Mar 4, 2024
c8bdf4a
Documentation for function SVGSurfaceSetDocumentUnit
pebbe Mar 4, 2024
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50 changes: 38 additions & 12 deletions surface.go
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Original file line number Diff line number Diff line change
@@ -1,12 +1,38 @@
//go:build !goci
// +build !goci

package cairo

// #include <cairo/cairo-pdf.h>
// #include <cairo/cairo-ps.h>
// #include <cairo/cairo-svg.h>
// #include <stdlib.h>
// #include <string.h>
/*
#include <cairo/cairo-pdf.h>
#include <cairo/cairo-ps.h>
#include <cairo/cairo-svg.h>
#include <cairo/cairo-version.h>
#include <stdlib.h>
#include <string.h>

#if CAIRO_VERSION_MAJOR == 1
#if CAIRO_VERSION_MINOR < 16
typedef enum _cairo_svg_unit {
CAIRO_SVG_UNIT_USER = 0,
CAIRO_SVG_UNIT_EM,
CAIRO_SVG_UNIT_EX,
CAIRO_SVG_UNIT_PX,
CAIRO_SVG_UNIT_IN,
CAIRO_SVG_UNIT_CM,
CAIRO_SVG_UNIT_MM,
CAIRO_SVG_UNIT_PT,
CAIRO_SVG_UNIT_PC,
CAIRO_SVG_UNIT_PERCENT
} cairo_svg_unit_t;
void
cairo_svg_surface_set_document_unit (cairo_surface_t *surface,
cairo_svg_unit_t unit) {
}
#endif
#endif

*/
import "C"

import (
Expand All @@ -17,8 +43,10 @@ import (
"github.com/ungerik/go-cairo/extimage"
)

type Cairo_surface *C.cairo_surface_t
type Cairo_context *C.cairo_t
type (
Cairo_surface *C.cairo_surface_t
Cairo_context *C.cairo_t
)

// Golang struct to hold both a cairo surface and a cairo context
type Surface struct {
Expand All @@ -45,7 +73,6 @@ func NewSurfaceFromData(data unsafe.Pointer, format Format, width, height, strid
}

func NewSurfaceFromPNG(filename string) (*Surface, Status) {

cstr := C.CString(filename)
defer C.free(unsafe.Pointer(cstr))

Expand All @@ -70,7 +97,6 @@ func NewSurfaceFromPNG(filename string) (*Surface, Status) {
}

func (self *Surface) Native() (surface, context uintptr) {

surface = uintptr(unsafe.Pointer(self.surface))
context = uintptr(unsafe.Pointer(self.context))

Expand Down Expand Up @@ -139,6 +165,7 @@ func NewRecordingSurface(content Content, extents *Rectangle) *Surface {
return &Surface{surface: s, context: C.cairo_create(s)}
}

// Use of this function has no effect with Cairo older than version 1.16
func (self *Surface) SVGSurfaceSetDocumentUnit(unit SVGUnit) {
C.cairo_svg_surface_set_document_unit(self.surface, C.cairo_svg_unit_t(unit))
}
Expand Down Expand Up @@ -541,7 +568,7 @@ func (self *Surface) TextExtents(text string) *TextExtents {

func (self *Surface) GlyphExtents(glyphs []Glyph) *TextExtents {
panic("not implemented") // todo
//C.cairo_text_extents
// C.cairo_text_extents
}

func (self *Surface) FontExtents() *FontExtents {
Expand Down Expand Up @@ -588,7 +615,7 @@ func (self *Surface) Destroy() {
}

func (self *Surface) GetDevice() *Device {
//C.cairo_surface_get_device
// C.cairo_surface_get_device
panic("not implemented") // todo
}

Expand All @@ -609,7 +636,6 @@ func (self *Surface) GetContent() Content {
}

func (self *Surface) WriteToPNG(filename string) Status {

cs := C.CString(filename)
defer C.free(unsafe.Pointer(cs))

Expand Down
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