forked from KolibriOS/kolibrios
273 lines
6.9 KiB
C
273 lines
6.9 KiB
C
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#define COMPONENT_SIZE 8
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#define MASK 0xff
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#define ONE_HALF 0x80
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#define A_SHIFT 8 * 3
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#define R_SHIFT 8 * 2
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#define G_SHIFT 8
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#define A_MASK 0xff000000
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#define R_MASK 0xff0000
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#define G_MASK 0xff00
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#define RB_MASK 0xff00ff
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#define AG_MASK 0xff00ff00
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#define RB_ONE_HALF 0x800080
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#define RB_MASK_PLUS_ONE 0x10000100
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#define ALPHA_8(x) ((x) >> A_SHIFT)
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#define RED_8(x) (((x) >> R_SHIFT) & MASK)
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#define GREEN_8(x) (((x) >> G_SHIFT) & MASK)
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#define BLUE_8(x) ((x) & MASK)
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/*
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* ARMv6 has UQADD8 instruction, which implements unsigned saturated
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* addition for 8-bit values packed in 32-bit registers. It is very useful
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* for UN8x4_ADD_UN8x4, UN8_rb_ADD_UN8_rb and ADD_UN8 macros (which would
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* otherwise need a lot of arithmetic operations to simulate this operation).
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* Since most of the major ARM linux distros are built for ARMv7, we are
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* much less dependent on runtime CPU detection and can get practical
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* benefits from conditional compilation here for a lot of users.
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*/
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#if defined(USE_GCC_INLINE_ASM) && defined(__arm__) && \
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!defined(__aarch64__) && (!defined(__thumb__) || defined(__thumb2__))
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#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \
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defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \
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defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) || \
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defined(__ARM_ARCH_6M__) || defined(__ARM_ARCH_7__) || \
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defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || \
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defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__)
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static force_inline uint32_t
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un8x4_add_un8x4 (uint32_t x, uint32_t y)
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{
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uint32_t t;
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asm ("uqadd8 %0, %1, %2" : "=r" (t) : "%r" (x), "r" (y));
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return t;
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}
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#define UN8x4_ADD_UN8x4(x, y) \
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((x) = un8x4_add_un8x4 ((x), (y)))
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#define UN8_rb_ADD_UN8_rb(x, y, t) \
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((t) = un8x4_add_un8x4 ((x), (y)), (x) = (t))
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#define ADD_UN8(x, y, t) \
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((t) = (x), un8x4_add_un8x4 ((t), (y)))
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#endif
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#endif
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/*****************************************************************************/
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/*
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* Helper macros.
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*/
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#define MUL_UN8(a, b, t) \
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((t) = (a) * (uint16_t)(b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
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#define DIV_UN8(a, b) \
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(((uint16_t) (a) * MASK + ((b) / 2)) / (b))
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#ifndef ADD_UN8
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#define ADD_UN8(x, y, t) \
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((t) = (x) + (y), \
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(uint32_t) (uint8_t) ((t) | (0 - ((t) >> G_SHIFT))))
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#endif
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#define DIV_ONE_UN8(x) \
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(((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT)
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/*
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* The methods below use some tricks to be able to do two color
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* components at the same time.
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*/
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/*
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* x_rb = (x_rb * a) / 255
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*/
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#define UN8_rb_MUL_UN8(x, a, t) \
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do \
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{ \
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t = ((x) & RB_MASK) * (a); \
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t += RB_ONE_HALF; \
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x = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
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x &= RB_MASK; \
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} while (0)
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/*
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* x_rb = min (x_rb + y_rb, 255)
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*/
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#ifndef UN8_rb_ADD_UN8_rb
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#define UN8_rb_ADD_UN8_rb(x, y, t) \
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do \
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{ \
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t = ((x) + (y)); \
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t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
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x = (t & RB_MASK); \
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} while (0)
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#endif
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/*
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* x_rb = (x_rb * a_rb) / 255
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*/
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#define UN8_rb_MUL_UN8_rb(x, a, t) \
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do \
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{ \
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t = (x & MASK) * (a & MASK); \
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t |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
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t += RB_ONE_HALF; \
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t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
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x = t & RB_MASK; \
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} while (0)
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/*
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* x_c = (x_c * a) / 255
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*/
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#define UN8x4_MUL_UN8(x, a) \
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do \
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{ \
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uint32_t r1__, r2__, t__; \
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\
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r1__ = (x); \
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UN8_rb_MUL_UN8 (r1__, (a), t__); \
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\
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r2__ = (x) >> G_SHIFT; \
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UN8_rb_MUL_UN8 (r2__, (a), t__); \
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\
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(x) = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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/*
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* x_c = (x_c * a) / 255 + y_c
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*/
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#define UN8x4_MUL_UN8_ADD_UN8x4(x, a, y) \
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do \
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{ \
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uint32_t r1__, r2__, r3__, t__; \
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\
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r1__ = (x); \
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r2__ = (y) & RB_MASK; \
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UN8_rb_MUL_UN8 (r1__, (a), t__); \
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UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
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\
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r2__ = (x) >> G_SHIFT; \
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r3__ = ((y) >> G_SHIFT) & RB_MASK; \
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UN8_rb_MUL_UN8 (r2__, (a), t__); \
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UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
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\
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(x) = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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/*
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* x_c = (x_c * a + y_c * b) / 255
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*/
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#define UN8x4_MUL_UN8_ADD_UN8x4_MUL_UN8(x, a, y, b) \
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do \
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{ \
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uint32_t r1__, r2__, r3__, t__; \
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\
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r1__ = (x); \
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r2__ = (y); \
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UN8_rb_MUL_UN8 (r1__, (a), t__); \
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UN8_rb_MUL_UN8 (r2__, (b), t__); \
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UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
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\
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r2__ = ((x) >> G_SHIFT); \
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r3__ = ((y) >> G_SHIFT); \
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UN8_rb_MUL_UN8 (r2__, (a), t__); \
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UN8_rb_MUL_UN8 (r3__, (b), t__); \
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UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
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\
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(x) = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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/*
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* x_c = (x_c * a_c) / 255
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*/
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#define UN8x4_MUL_UN8x4(x, a) \
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do \
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{ \
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uint32_t r1__, r2__, r3__, t__; \
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\
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r1__ = (x); \
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r2__ = (a); \
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UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \
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\
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r2__ = (x) >> G_SHIFT; \
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r3__ = (a) >> G_SHIFT; \
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UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \
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\
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(x) = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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/*
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* x_c = (x_c * a_c) / 255 + y_c
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*/
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#define UN8x4_MUL_UN8x4_ADD_UN8x4(x, a, y) \
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do \
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{ \
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uint32_t r1__, r2__, r3__, t__; \
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\
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r1__ = (x); \
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r2__ = (a); \
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UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \
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r2__ = (y) & RB_MASK; \
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UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
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\
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r2__ = ((x) >> G_SHIFT); \
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r3__ = ((a) >> G_SHIFT); \
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UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \
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r3__ = ((y) >> G_SHIFT) & RB_MASK; \
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UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
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\
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(x) = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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/*
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* x_c = (x_c * a_c + y_c * b) / 255
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*/
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#define UN8x4_MUL_UN8x4_ADD_UN8x4_MUL_UN8(x, a, y, b) \
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do \
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{ \
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uint32_t r1__, r2__, r3__, t__; \
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\
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r1__ = (x); \
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r2__ = (a); \
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UN8_rb_MUL_UN8_rb (r1__, r2__, t__); \
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r2__ = (y); \
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UN8_rb_MUL_UN8 (r2__, (b), t__); \
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UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
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\
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r2__ = (x) >> G_SHIFT; \
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r3__ = (a) >> G_SHIFT; \
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UN8_rb_MUL_UN8_rb (r2__, r3__, t__); \
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r3__ = (y) >> G_SHIFT; \
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UN8_rb_MUL_UN8 (r3__, (b), t__); \
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UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
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\
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x = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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/*
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x_c = min(x_c + y_c, 255)
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*/
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#ifndef UN8x4_ADD_UN8x4
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#define UN8x4_ADD_UN8x4(x, y) \
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do \
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{ \
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uint32_t r1__, r2__, r3__, t__; \
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\
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r1__ = (x) & RB_MASK; \
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r2__ = (y) & RB_MASK; \
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UN8_rb_ADD_UN8_rb (r1__, r2__, t__); \
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\
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r2__ = ((x) >> G_SHIFT) & RB_MASK; \
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r3__ = ((y) >> G_SHIFT) & RB_MASK; \
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UN8_rb_ADD_UN8_rb (r2__, r3__, t__); \
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\
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x = r1__ | (r2__ << G_SHIFT); \
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} while (0)
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#endif
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