diff options
Diffstat (limited to 'area.go')
| -rw-r--r-- | area.go | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -340,8 +340,8 @@ func pixelData(img *image.RGBA) *uint8 { // some platforms require pixels in ARGB order in their native endianness (because they treat the pixel array as an array of uint32s) // this does the conversion -// you need to convert somewhere; this memory is assumed to have a stride equal to the pixels per scanline (Windows gives us memory to use; other platforms we'll see) -func toARGB(i *image.RGBA, memory uintptr) { +// you need to convert somewhere (Windows and cairo give us memory to use; Windows has stride==width but cairo might not) +func toARGB(i *image.RGBA, memory uintptr, memstride int) { var realbits []byte rbs := (*reflect.SliceHeader)(unsafe.Pointer(&realbits)) @@ -352,6 +352,7 @@ func toARGB(i *image.RGBA, memory uintptr) { q := 0 for y := i.Rect.Min.Y; y < i.Rect.Max.Y; y++ { nextp := p + i.Stride + nextq := q + memstride for x := i.Rect.Min.X; x < i.Rect.Max.X; x++ { argb := uint32(i.Pix[p + 3]) << 24 // A argb |= uint32(i.Pix[p + 0]) << 16 // R @@ -367,5 +368,6 @@ func toARGB(i *image.RGBA, memory uintptr) { q += 4 } p = nextp + q = nextq } } |