| |
| #define COMPONENT_SIZE |
| #define MASK |
| #define ONE_HALF |
| |
| #define A_SHIFT |
| #define R_SHIFT |
| #define G_SHIFT |
| #define A_MASK |
| #define R_MASK |
| #define G_MASK |
| |
| #define RB_MASK |
| #define AG_MASK |
| #define RB_ONE_HALF |
| #define RB_MASK_PLUS_ONE |
| |
| #define ALPHA_c(x) ((x) >> A_SHIFT) |
| #define RED_c(x) (((x) >> R_SHIFT) & MASK) |
| #define GREEN_c(x) (((x) >> G_SHIFT) & MASK) |
| #define BLUE_c(x) ((x) & MASK) |
| |
| /* |
| * Helper macros. |
| */ |
| |
| #define MUL_UNc(a, b, t) \ |
| ((t) = (a) * (b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT )) |
| |
| #define DIV_UNc(a, b) \ |
| (((comp2_t) (a) * MASK) / (b)) |
| |
| #define ADD_UNc(x, y, t) \ |
| ((t) = (x) + (y), \ |
| (comp4_t) (comp1_t) ((t) | (0 - ((t) >> G_SHIFT)))) |
| |
| #define DIV_ONE_UNc(x) \ |
| (((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT) |
| |
| /* |
| * The methods below use some tricks to be able to do two color |
| * components at the same time. |
| */ |
| |
| /* |
| * x_rb = (x_rb * a) / 255 |
| */ |
| #define UNc_rb_MUL_UNc(x, a, t) \ |
| do \ |
| { \ |
| t = ((x) & RB_MASK) * (a); \ |
| t += RB_ONE_HALF; \ |
| x = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \ |
| x &= RB_MASK; \ |
| } while (0) |
| |
| /* |
| * x_rb = min (x_rb + y_rb, 255) |
| */ |
| #define UNc_rb_ADD_UNc_rb(x, y, t) \ |
| do \ |
| { \ |
| t = ((x) + (y)); \ |
| t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \ |
| x = (t & RB_MASK); \ |
| } while (0) |
| |
| /* |
| * x_rb = (x_rb * a_rb) / 255 |
| */ |
| #define UNc_rb_MUL_UNc_rb(x, a, t) \ |
| do \ |
| { \ |
| t = (x & MASK) * (a & MASK); \ |
| t |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \ |
| t += RB_ONE_HALF; \ |
| t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \ |
| x = t & RB_MASK; \ |
| } while (0) |
| |
| /* |
| * x_c = (x_c * a) / 255 |
| */ |
| #define UNcx4_MUL_UNc(x, a) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, t__; \ |
| \ |
| r1__ = (x); \ |
| UNc_rb_MUL_UNc (r1__, (a), t__); \ |
| \ |
| r2__ = (x) >> G_SHIFT; \ |
| UNc_rb_MUL_UNc (r2__, (a), t__); \ |
| \ |
| (x) = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |
| |
| /* |
| * x_c = (x_c * a) / 255 + y_c |
| */ |
| #define UNcx4_MUL_UNc_ADD_UNcx4(x, a, y) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, r3__, t__; \ |
| \ |
| r1__ = (x); \ |
| r2__ = (y) & RB_MASK; \ |
| UNc_rb_MUL_UNc (r1__, (a), t__); \ |
| UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \ |
| \ |
| r2__ = (x) >> G_SHIFT; \ |
| r3__ = ((y) >> G_SHIFT) & RB_MASK; \ |
| UNc_rb_MUL_UNc (r2__, (a), t__); \ |
| UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \ |
| \ |
| (x) = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |
| |
| /* |
| * x_c = (x_c * a + y_c * b) / 255 |
| */ |
| #define UNcx4_MUL_UNc_ADD_UNcx4_MUL_UNc(x, a, y, b) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, r3__, t__; \ |
| \ |
| r1__ = (x); \ |
| r2__ = (y); \ |
| UNc_rb_MUL_UNc (r1__, (a), t__); \ |
| UNc_rb_MUL_UNc (r2__, (b), t__); \ |
| UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \ |
| \ |
| r2__ = ((x) >> G_SHIFT); \ |
| r3__ = ((y) >> G_SHIFT); \ |
| UNc_rb_MUL_UNc (r2__, (a), t__); \ |
| UNc_rb_MUL_UNc (r3__, (b), t__); \ |
| UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \ |
| \ |
| (x) = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |
| |
| /* |
| * x_c = (x_c * a_c) / 255 |
| */ |
| #define UNcx4_MUL_UNcx4(x, a) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, r3__, t__; \ |
| \ |
| r1__ = (x); \ |
| r2__ = (a); \ |
| UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \ |
| \ |
| r2__ = (x) >> G_SHIFT; \ |
| r3__ = (a) >> G_SHIFT; \ |
| UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \ |
| \ |
| (x) = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |
| |
| /* |
| * x_c = (x_c * a_c) / 255 + y_c |
| */ |
| #define UNcx4_MUL_UNcx4_ADD_UNcx4(x, a, y) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, r3__, t__; \ |
| \ |
| r1__ = (x); \ |
| r2__ = (a); \ |
| UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \ |
| r2__ = (y) & RB_MASK; \ |
| UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \ |
| \ |
| r2__ = ((x) >> G_SHIFT); \ |
| r3__ = ((a) >> G_SHIFT); \ |
| UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \ |
| r3__ = ((y) >> G_SHIFT) & RB_MASK; \ |
| UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \ |
| \ |
| (x) = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |
| |
| /* |
| * x_c = (x_c * a_c + y_c * b) / 255 |
| */ |
| #define UNcx4_MUL_UNcx4_ADD_UNcx4_MUL_UNc(x, a, y, b) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, r3__, t__; \ |
| \ |
| r1__ = (x); \ |
| r2__ = (a); \ |
| UNc_rb_MUL_UNc_rb (r1__, r2__, t__); \ |
| r2__ = (y); \ |
| UNc_rb_MUL_UNc (r2__, (b), t__); \ |
| UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \ |
| \ |
| r2__ = (x) >> G_SHIFT; \ |
| r3__ = (a) >> G_SHIFT; \ |
| UNc_rb_MUL_UNc_rb (r2__, r3__, t__); \ |
| r3__ = (y) >> G_SHIFT; \ |
| UNc_rb_MUL_UNc (r3__, (b), t__); \ |
| UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \ |
| \ |
| x = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |
| |
| /* |
| x_c = min(x_c + y_c, 255) |
| */ |
| #define UNcx4_ADD_UNcx4(x, y) \ |
| do \ |
| { \ |
| comp4_t r1__, r2__, r3__, t__; \ |
| \ |
| r1__ = (x) & RB_MASK; \ |
| r2__ = (y) & RB_MASK; \ |
| UNc_rb_ADD_UNc_rb (r1__, r2__, t__); \ |
| \ |
| r2__ = ((x) >> G_SHIFT) & RB_MASK; \ |
| r3__ = ((y) >> G_SHIFT) & RB_MASK; \ |
| UNc_rb_ADD_UNc_rb (r2__, r3__, t__); \ |
| \ |
| x = r1__ | (r2__ << G_SHIFT); \ |
| } while (0) |