1 files changed, 0 insertions, 51 deletions
diff --git a/gfx/cairo/libpixman/src/pixman-dither.h b/gfx/cairo/libpixman/src/pixman-dither.h
deleted file mode 100644
index ead9f38d8c..0000000000
--- a/gfx/cairo/libpixman/src/pixman-dither.h
+++ /dev/null
@@ -1,51 +0,0 @@
-#define R16_BITS     5
-#define G16_BITS     6
-#define B16_BITS     5
-
-#define R16_SHIFT    (B16_BITS + G16_BITS)
-#define G16_SHIFT    (B16_BITS)
-#define B16_SHIFT    0
-
-#define MASK 0xff
-#define ONE_HALF 0x80
-
-#define A_SHIFT 8 * 3
-#define R_SHIFT 8 * 2
-#define G_SHIFT 8
-#define A_MASK 0xff000000
-#define R_MASK 0xff0000
-#define G_MASK 0xff00
-
-#define RB_MASK 0xff00ff
-#define AG_MASK 0xff00ff00
-#define RB_ONE_HALF 0x800080
-#define RB_MASK_PLUS_ONE 0x10000100
-
-#define ALPHA_8(x) ((x) >> A_SHIFT)
-#define RED_8(x) (((x) >> R_SHIFT) & MASK)
-#define GREEN_8(x) (((x) >> G_SHIFT) & MASK)
-#define BLUE_8(x) ((x) & MASK)
-
-// This uses the same dithering technique that Skia does.
-// It is essentially preturbing the lower bit based on the
-// high bit
-static inline uint16_t dither_32_to_16(uint32_t c)
-{
-    uint8_t b = BLUE_8(c);
-    uint8_t g = GREEN_8(c);
-    uint8_t r = RED_8(c);
-    r = ((r << 1) - ((r >> (8 - R16_BITS) << (8 - R16_BITS)) | (r >> R16_BITS))) >> (8 - R16_BITS);
-    g = ((g << 1) - ((g >> (8 - G16_BITS) << (8 - G16_BITS)) | (g >> G16_BITS))) >> (8 - G16_BITS);
-    b = ((b << 1) - ((b >> (8 - B16_BITS) << (8 - B16_BITS)) | (b >> B16_BITS))) >> (8 - B16_BITS);
-    return ((r << R16_SHIFT) | (g << G16_SHIFT) | (b << B16_SHIFT));
-}
-
-static inline uint16_t dither_8888_to_0565(uint32_t color, pixman_bool_t toggle)
-{
-    // alternate between a preturbed truncation and a regular truncation
-    if (toggle) {
-	return dither_32_to_16(color);
-    } else {
-	return convert_8888_to_0565(color);
-    }
-}