diff options
Diffstat (limited to 'pixman/pixman/combine.h.inc')
| -rw-r--r-- | pixman/pixman/combine.h.inc | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/pixman/pixman/combine.h.inc b/pixman/pixman/combine.h.inc new file mode 100644 index 000000000..8c70cb78d --- /dev/null +++ b/pixman/pixman/combine.h.inc @@ -0,0 +1,227 @@ + +#define COMPONENT_SIZE +#define MASK +#define ONE_HALF + +#define G_SHIFT +#define B_SHIFT +#define A_SHIFT +#define G_MASK +#define B_MASK +#define A_MASK + +#define RB_MASK +#define AG_MASK +#define RB_ONE_HALF +#define RB_MASK_PLUS_ONE + +#define Alpha(x) ((x) >> A_SHIFT) + +/* + * Helper macros. + */ + +#define IntMult(a,b,t) ( (t) = (a) * (b) + ONE_HALF, ( ( ( (t)>>G_SHIFT ) + (t) )>>G_SHIFT ) ) +#define IntDiv(a,b) (((comp2_t) (a) * MASK) / (b)) + +#define GetComp(v,i) ((comp2_t) (comp1_t) ((v) >> i)) + +#define Add(x,y,i,t) ((t) = GetComp(x,i) + GetComp(y,i), \ + (comp4_t) ((comp1_t) ((t) | (0 - ((t) >> G_SHIFT)))) << (i)) + +#define FbGen(x,y,i,ax,ay,t,u,v) ((t) = (IntMult(GetComp(y,i),ay,(u)) + \ + IntMult(GetComp(x,i),ax,(v))), \ + (comp4_t) ((comp1_t) ((t) | \ + (0 - ((t) >> G_SHIFT)))) << (i)) + +/* + The methods below use some tricks to be able to do two color + components at the same time. +*/ + +/* + x_c = (x_c * a) / 255 +*/ +#define FbByteMul(x, a) do { \ + comp4_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \ + t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \ + t &= RB_MASK; \ + \ + x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \ + x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)); \ + x &= RB_MASK << COMPONENT_SIZE; \ + x += t; \ + } while (0) + +/* + x_c = (x_c * a) / 255 + y +*/ +#define FbByteMulAdd(x, a, y) do { \ + /* multiply and divide: trunc((i + 128)*257/65536) */ \ + comp4_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \ + t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \ + t &= RB_MASK; \ + \ + /* add */ \ + t += y & RB_MASK; \ + \ + /* saturate */ \ + t |= RB_MASK_PLUS_ONE - ((t >> COMPONENT_SIZE) & RB_MASK); \ + t &= RB_MASK; \ + \ + /* multiply and divide */ \ + x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \ + x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \ + x &= RB_MASK; \ + \ + /* add */ \ + x += (y >> COMPONENT_SIZE) & RB_MASK; \ + \ + /* saturate */ \ + x |= RB_MASK_PLUS_ONE - ((x >> COMPONENT_SIZE) & RB_MASK); \ + x &= RB_MASK; \ + \ + /* recombine */ \ + x <<= COMPONENT_SIZE; \ + x += t; \ + } while (0) + +/* + x_c = (x_c * a + y_c * b) / 255 +*/ +#define FbByteAddMul(x, a, y, b) do { \ + comp4_t t; \ + comp4_t r = (x >> A_SHIFT) * a + (y >> A_SHIFT) * b + ONE_HALF; \ + r += (r >> G_SHIFT); \ + r >>= G_SHIFT; \ + \ + t = (x & G_MASK) * a + (y & G_MASK) * b; \ + t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \ + t >>= B_SHIFT; \ + \ + t |= r << B_SHIFT; \ + t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \ + t &= RB_MASK; \ + t <<= G_SHIFT; \ + \ + r = ((x >> B_SHIFT) & MASK) * a + \ + ((y >> B_SHIFT) & MASK) * b + ONE_HALF; \ + r += (r >> G_SHIFT); \ + r >>= G_SHIFT; \ + \ + x = (x & MASK) * a + (y & MASK) * b + ONE_HALF; \ + x += (x >> G_SHIFT); \ + x >>= G_SHIFT; \ + x |= r << B_SHIFT; \ + x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \ + x &= RB_MASK; \ + x |= t; \ + } while (0) + +/* + x_c = (x_c * a + y_c *b) / 256 +*/ +#define FbByteAddMul_256(x, a, y, b) do { \ + comp4_t t = (x & RB_MASK) * a + (y & RB_MASK) * b; \ + t >>= G_SHIFT; \ + t &= RB_MASK; \ + \ + x = ((x >> G_SHIFT) & RB_MASK) * a + \ + ((y >> G_SHIFT) & RB_MASK) * b; \ + x &= AG_MASK; \ + x += t; \ + } while (0) + +/* + x_c = (x_c * a_c) / 255 +*/ +#define FbByteMulC(x, a) do { \ + comp4_t t; \ + comp4_t r = (x & MASK) * (a & MASK); \ + r |= (x & B_MASK) * ((a >> B_SHIFT) & MASK); \ + r += RB_ONE_HALF; \ + r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \ + r &= RB_MASK; \ + \ + x >>= G_SHIFT; \ + t = (x & MASK) * ((a >> G_SHIFT) & MASK); \ + t |= (x & B_MASK) * (a >> A_SHIFT); \ + t += RB_ONE_HALF; \ + t = t + ((t >> G_SHIFT) & RB_MASK); \ + x = r | (t & AG_MASK); \ + } while (0) + +/* + x_c = (x_c * a) / 255 + y +*/ +#define FbByteMulAddC(x, a, y) do { \ + comp4_t t; \ + comp4_t r = (x & MASK) * (a & MASK); \ + r |= (x & B_MASK) * ((a >> B_SHIFT) & MASK); \ + r += RB_ONE_HALF; \ + r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \ + r &= RB_MASK; \ + r += y & RB_MASK; \ + r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \ + r &= RB_MASK; \ + \ + x >>= G_SHIFT; \ + t = (x & MASK) * ((a >> G_SHIFT) & MASK); \ + t |= (x & B_MASK) * (a >> A_SHIFT); \ + t += RB_ONE_HALF; \ + t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \ + t &= RB_MASK; \ + t += (y >> G_SHIFT) & RB_MASK; \ + t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \ + t &= RB_MASK; \ + x = r | (t << G_SHIFT); \ + } while (0) + +/* + x_c = (x_c * a_c + y_c * b) / 255 +*/ +#define FbByteAddMulC(x, a, y, b) do { \ + comp4_t t; \ + comp4_t r = (x >> A_SHIFT) * (a >> A_SHIFT) + \ + (y >> A_SHIFT) * b; \ + r += (r >> G_SHIFT) + ONE_HALF; \ + r >>= G_SHIFT; \ + \ + t = (x & G_MASK) * ((a >> G_SHIFT) & MASK) + (y & G_MASK) * b; \ + t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \ + t >>= B_SHIFT; \ + \ + t |= r << B_SHIFT; \ + t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \ + t &= RB_MASK; \ + t <<= G_SHIFT; \ + \ + r = ((x >> B_SHIFT) & MASK) * ((a >> B_SHIFT) & MASK) + \ + ((y >> B_SHIFT) & MASK) * b + ONE_HALF; \ + r += (r >> G_SHIFT); \ + r >>= G_SHIFT; \ + \ + x = (x & MASK) * (a & MASK) + (y & MASK) * b + ONE_HALF; \ + x += (x >> G_SHIFT); \ + x >>= G_SHIFT; \ + x |= r << B_SHIFT; \ + x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \ + x &= RB_MASK; \ + x |= t; \ + } while (0) + +/* + x_c = min(x_c + y_c, 255) +*/ +#define FbByteAdd(x, y) do { \ + comp4_t t; \ + comp4_t r = (x & RB_MASK) + (y & RB_MASK); \ + r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \ + r &= RB_MASK; \ + \ + t = ((x >> G_SHIFT) & RB_MASK) + ((y >> G_SHIFT) & RB_MASK); \ + t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \ + r |= (t & RB_MASK) << G_SHIFT; \ + x = r; \ + } while (0) + |