}
}
+#if SIZEOF_LONG > 4
+
+static inline uint32_t
+bilinear_interpolation (uint32_t tl, uint32_t tr,
+ uint32_t bl, uint32_t br,
+ int distx, int disty)
+{
+ uint64_t distxy, distxiy, distixy, distixiy;
+ uint64_t tl64, tr64, bl64, br64;
+ uint64_t f, r;
+
+ distxy = distx * disty;
+ distxiy = distx * (256 - disty);
+ distixy = (256 - distx) * disty;
+ distixiy = (256 - distx) * (256 - disty);
+
+ /* Alpha and Blue */
+ tl64 = tl & 0xff0000ff;
+ tr64 = tr & 0xff0000ff;
+ bl64 = bl & 0xff0000ff;
+ br64 = br & 0xff0000ff;
+
+ f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy;
+ r = f & 0x0000ff0000ff0000ull;
+
+ /* Red and Green */
+ tl64 = tl;
+ tl64 = ((tl64 << 16) & 0x000000ff00000000ull) | (tl64 & 0x0000ff00ull);
+
+ tr64 = tr;
+ tr64 = ((tr64 << 16) & 0x000000ff00000000ull) | (tr64 & 0x0000ff00ull);
+
+ bl64 = bl;
+ bl64 = ((bl64 << 16) & 0x000000ff00000000ull) | (bl64 & 0x0000ff00ull);
+
+ br64 = br;
+ br64 = ((br64 << 16) & 0x000000ff00000000ull) | (br64 & 0x0000ff00ull);
+
+ f = tl64 * distixiy + tr64 * distxiy + bl64 * distixy + br64 * distxy;
+ r |= ((f >> 16) & 0x000000ff00000000ull) | (f & 0xff000000ull);
+
+ return (uint32_t)(r >> 16);
+}
+
+#else
+
+static inline uint32_t
+bilinear_interpolation (uint32_t tl, uint32_t tr,
+ uint32_t bl, uint32_t br,
+ int distx, int disty)
+{
+ int distxy, distxiy, distixy, distixiy;
+ uint32_t f, r;
+
+ distxy = distx * disty;
+ distxiy = distx * (256 - disty);
+ distixy = (256 - distx) * disty;
+ distixiy = (256 - distx) * (256 - disty);
+
+ /* Blue */
+ r = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy
+ + (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy;
+
+ /* Green */
+ f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy
+ + (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy;
+ r |= f & 0xff000000;
+
+ tl >>= 16;
+ tr >>= 16;
+ bl >>= 16;
+ br >>= 16;
+ r >>= 16;
+
+ /* Red */
+ f = (tl & 0x000000ff) * distixiy + (tr & 0x000000ff) * distxiy
+ + (bl & 0x000000ff) * distixy + (br & 0x000000ff) * distxy;
+ r |= f & 0x00ff0000;
+
+ /* Alpha */
+ f = (tl & 0x0000ff00) * distixiy + (tr & 0x0000ff00) * distxiy
+ + (bl & 0x0000ff00) * distixy + (br & 0x0000ff00) * distxy;
+ r |= f & 0xff000000;
+
+ return r;
+}
+
+#endif
+
static force_inline uint32_t
bits_image_fetch_pixel_bilinear (bits_image_t *image,
pixman_fixed_t x,
int width = image->width;
int height = image->height;
int x1, y1, x2, y2;
- uint32_t tl, tr, bl, br, r;
- int32_t distx, disty, idistx, idisty;
- uint32_t ft, fb;
+ uint32_t tl, tr, bl, br;
+ int32_t distx, disty;
x1 = x - pixman_fixed_1 / 2;
y1 = y - pixman_fixed_1 / 2;
repeat (repeat_mode, height, &y1);
repeat (repeat_mode, width, &x2);
repeat (repeat_mode, height, &y2);
-
+
tl = get_pixel (image, x1, y1, FALSE);
bl = get_pixel (image, x1, y2, FALSE);
tr = get_pixel (image, x2, y1, FALSE);
br = get_pixel (image, x2, y2, TRUE);
}
- idistx = 256 - distx;
- idisty = 256 - disty;
-
-#define GET8(v, i) ((uint16_t) (uint8_t) ((v) >> i))
- ft = GET8 (tl, 0) * idistx + GET8 (tr, 0) * distx;
- fb = GET8 (bl, 0) * idistx + GET8 (br, 0) * distx;
- r = (((ft * idisty + fb * disty) >> 16) & 0xff);
- ft = GET8 (tl, 8) * idistx + GET8 (tr, 8) * distx;
- fb = GET8 (bl, 8) * idistx + GET8 (br, 8) * distx;
- r |= (((ft * idisty + fb * disty) >> 8) & 0xff00);
- ft = GET8 (tl, 16) * idistx + GET8 (tr, 16) * distx;
- fb = GET8 (bl, 16) * idistx + GET8 (br, 16) * distx;
- r |= (((ft * idisty + fb * disty)) & 0xff0000);
- ft = GET8 (tl, 24) * idistx + GET8 (tr, 24) * distx;
- fb = GET8 (bl, 24) * idistx + GET8 (br, 24) * distx;
- r |= (((ft * idisty + fb * disty) << 8) & 0xff000000);
-
- return r;
+ return bilinear_interpolation (tl, tr, bl, br, distx, disty);
}
static force_inline uint32_t