diff options
Diffstat (limited to 'src/pixman/pixman/pixman-combine32.h')
| -rw-r--r-- | src/pixman/pixman/pixman-combine32.h | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/src/pixman/pixman/pixman-combine32.h b/src/pixman/pixman/pixman-combine32.h new file mode 100644 index 0000000..cdd56a6 --- /dev/null +++ b/src/pixman/pixman/pixman-combine32.h @@ -0,0 +1,272 @@ +#define COMPONENT_SIZE 8 +#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) + +/* + * ARMv6 has UQADD8 instruction, which implements unsigned saturated + * addition for 8-bit values packed in 32-bit registers. It is very useful + * for UN8x4_ADD_UN8x4, UN8_rb_ADD_UN8_rb and ADD_UN8 macros (which would + * otherwise need a lot of arithmetic operations to simulate this operation). + * Since most of the major ARM linux distros are built for ARMv7, we are + * much less dependent on runtime CPU detection and can get practical + * benefits from conditional compilation here for a lot of users. + */ + +#if defined(USE_GCC_INLINE_ASM) && defined(__arm__) && \ + !defined(__aarch64__) && (!defined(__thumb__) || defined(__thumb2__)) +#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \ + defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \ + defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) || \ + defined(__ARM_ARCH_6M__) || defined(__ARM_ARCH_7__) || \ + defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || \ + defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) + +static force_inline uint32_t +un8x4_add_un8x4 (uint32_t x, uint32_t y) +{ + uint32_t t; + asm ("uqadd8 %0, %1, %2" : "=r" (t) : "%r" (x), "r" (y)); + return t; +} + +#define UN8x4_ADD_UN8x4(x, y) \ + ((x) = un8x4_add_un8x4 ((x), (y))) + +#define UN8_rb_ADD_UN8_rb(x, y, t) \ + ((t) = un8x4_add_un8x4 ((x), (y)), (x) = (t)) + +#define ADD_UN8(x, y, t) \ + ((t) = (x), un8x4_add_un8x4 ((t), (y))) + +#endif +#endif + +/*****************************************************************************/ + +/* + * Helper macros. + */ + +#define MUL_UN8(a, b, t) \ + ((t) = (a) * (uint16_t)(b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT )) + +#define DIV_UN8(a, b) \ + (((uint16_t) (a) * MASK + ((b) / 2)) / (b)) + +#ifndef ADD_UN8 +#define ADD_UN8(x, y, t) \ + ((t) = (x) + (y), \ + (uint32_t) (uint8_t) ((t) | (0 - ((t) >> G_SHIFT)))) +#endif + +#define DIV_ONE_UN8(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 UN8_rb_MUL_UN8(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) + */ +#ifndef UN8_rb_ADD_UN8_rb +#define UN8_rb_ADD_UN8_rb(x, y, t) \ + do \ + { \ + t = ((x) + (y)); \ + t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \ + x = (t & RB_MASK); \ + } while (0) +#endif + +/* + * x_rb = (x_rb * a_rb) / 255 + */ +#define UN8_rb_MUL_UN8_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 UN8x4_MUL_UN8(x, a) \ + do \ + { \ + uint32_t r1__, r2__, t__; \ + \ + r1__ = (x); \ + UN8_rb_MUL_UN8 (r1__, (a), t__); \ + \ + r2__ = (x) >> G_SHIFT; \ + UN8_rb_MUL_UN8 (r2__, (a), t__); \ + \ + (x) = r1__ | (r2__ << G_SHIFT); \ + } while (0) + +/* + * x_c = (x_c * a) / 255 + y_c + */ +#define UN8x4_MUL_UN8_ADD_UN8x4(x, a, y) \ + do \ + { \ + uint32_t r1__, r2__, r3__, t__; \ + \ + r1__ = (x); \ + r2__ = (y) & RB_MASK; \ + UN8_rb_MUL_UN8 (r1__, (a), t__); \ + UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \ + \ + r2__ = (x) >> G_SHIFT; \ + r3__ = ((y) >> G_SHIFT) & RB_MASK; \ + UN8_rb_MUL_UN8 (r2__, (a), t__); \ + UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \ + \ + (x) = r1__ | (r2__ << G_SHIFT); \ + } while (0) + +/* + * x_c = (x_c * a + y_c * b) / 255 + */ +#define UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8(x, a, y, b) \ + do \ + { \ + uint32_t r1__, r2__, r3__, t__; \ + \ + r1__ = (x); \ + r2__ = (y); \ + UN8_rb_MUL_UN8 (r1__, (a), t__); \ + UN8_rb_MUL_UN8 (r2__, (b), t__); \ + UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \ + \ + r2__ = ((x) >> G_SHIFT); \ + r3__ = ((y) >> G_SHIFT); \ + UN8_rb_MUL_UN8 (r2__, (a), t__); \ + UN8_rb_MUL_UN8 (r3__, (b), t__); \ + UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \ + \ + (x) = r1__ | (r2__ << G_SHIFT); \ + } while (0) + +/* + * x_c = (x_c * a_c) / 255 + */ +#define UN8x4_MUL_UN8x4(x, a) \ + do \ + { \ + uint32_t r1__, r2__, r3__, t__; \ + \ + r1__ = (x); \ + r2__ = (a); \ + UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \ + \ + r2__ = (x) >> G_SHIFT; \ + r3__ = (a) >> G_SHIFT; \ + UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \ + \ + (x) = r1__ | (r2__ << G_SHIFT); \ + } while (0) + +/* + * x_c = (x_c * a_c) / 255 + y_c + */ +#define UN8x4_MUL_UN8x4_ADD_UN8x4(x, a, y) \ + do \ + { \ + uint32_t r1__, r2__, r3__, t__; \ + \ + r1__ = (x); \ + r2__ = (a); \ + UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \ + r2__ = (y) & RB_MASK; \ + UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \ + \ + r2__ = ((x) >> G_SHIFT); \ + r3__ = ((a) >> G_SHIFT); \ + UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \ + r3__ = ((y) >> G_SHIFT) & RB_MASK; \ + UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \ + \ + (x) = r1__ | (r2__ << G_SHIFT); \ + } while (0) + +/* + * x_c = (x_c * a_c + y_c * b) / 255 + */ +#define UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8(x, a, y, b) \ + do \ + { \ + uint32_t r1__, r2__, r3__, t__; \ + \ + r1__ = (x); \ + r2__ = (a); \ + UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \ + r2__ = (y); \ + UN8_rb_MUL_UN8 (r2__, (b), t__); \ + UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \ + \ + r2__ = (x) >> G_SHIFT; \ + r3__ = (a) >> G_SHIFT; \ + UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \ + r3__ = (y) >> G_SHIFT; \ + UN8_rb_MUL_UN8 (r3__, (b), t__); \ + UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \ + \ + x = r1__ | (r2__ << G_SHIFT); \ + } while (0) + +/* + x_c = min(x_c + y_c, 255) +*/ +#ifndef UN8x4_ADD_UN8x4 +#define UN8x4_ADD_UN8x4(x, y) \ + do \ + { \ + uint32_t r1__, r2__, r3__, t__; \ + \ + r1__ = (x) & RB_MASK; \ + r2__ = (y) & RB_MASK; \ + UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \ + \ + r2__ = ((x) >> G_SHIFT) & RB_MASK; \ + r3__ = ((y) >> G_SHIFT) & RB_MASK; \ + UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \ + \ + x = r1__ | (r2__ << G_SHIFT); \ + } while (0) +#endif |
