| |
| /* |
| * Copyright 2009 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkColorPriv.h" |
| |
| /* |
| Filter_32_opaque |
| |
| There is no hard-n-fast rule that the filtering must produce |
| exact results for the color components, but if the 4 incoming colors are |
| all opaque, then the output color must also be opaque. Subsequent parts of |
| the drawing pipeline may rely on this (e.g. which blitrow proc to use). |
| */ |
| |
| #if defined(__ARM_HAVE_NEON) && !defined(SK_CPU_BENDIAN) |
| static inline void Filter_32_opaque_neon(unsigned x, unsigned y, |
| SkPMColor a00, SkPMColor a01, |
| SkPMColor a10, SkPMColor a11, |
| SkPMColor *dst) { |
| asm volatile( |
| "vdup.8 d0, %[y] \n\t" // duplicate y into d0 |
| "vmov.u8 d16, #16 \n\t" // set up constant in d16 |
| "vsub.u8 d1, d16, d0 \n\t" // d1 = 16-y |
| |
| "vdup.32 d4, %[a00] \n\t" // duplicate a00 into d4 |
| "vdup.32 d5, %[a10] \n\t" // duplicate a10 into d5 |
| "vmov.32 d4[1], %[a01] \n\t" // set top of d4 to a01 |
| "vmov.32 d5[1], %[a11] \n\t" // set top of d5 to a11 |
| |
| "vmull.u8 q3, d4, d1 \n\t" // q3 = [a01|a00] * (16-y) |
| "vmull.u8 q0, d5, d0 \n\t" // q0 = [a11|a10] * y |
| |
| "vdup.16 d5, %[x] \n\t" // duplicate x into d5 |
| "vmov.u16 d16, #16 \n\t" // set up constant in d16 |
| "vsub.u16 d3, d16, d5 \n\t" // d3 = 16-x |
| |
| "vmul.i16 d4, d7, d5 \n\t" // d4 = a01 * x |
| "vmla.i16 d4, d1, d5 \n\t" // d4 += a11 * x |
| "vmla.i16 d4, d6, d3 \n\t" // d4 += a00 * (16-x) |
| "vmla.i16 d4, d0, d3 \n\t" // d4 += a10 * (16-x) |
| "vshrn.i16 d0, q2, #8 \n\t" // shift down result by 8 |
| "vst1.32 {d0[0]}, [%[dst]] \n\t" // store result |
| : |
| : [x] "r" (x), [y] "r" (y), [a00] "r" (a00), [a01] "r" (a01), [a10] "r" (a10), [a11] "r" (a11), [dst] "r" (dst) |
| : "cc", "memory", "r4", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d16" |
| ); |
| } |
| |
| static inline void Filter_32_alpha_neon(unsigned x, unsigned y, |
| SkPMColor a00, SkPMColor a01, |
| SkPMColor a10, SkPMColor a11, |
| SkPMColor *dst, uint16_t scale) { |
| asm volatile( |
| "vdup.8 d0, %[y] \n\t" // duplicate y into d0 |
| "vmov.u8 d16, #16 \n\t" // set up constant in d16 |
| "vsub.u8 d1, d16, d0 \n\t" // d1 = 16-y |
| |
| "vdup.32 d4, %[a00] \n\t" // duplicate a00 into d4 |
| "vdup.32 d5, %[a10] \n\t" // duplicate a10 into d5 |
| "vmov.32 d4[1], %[a01] \n\t" // set top of d4 to a01 |
| "vmov.32 d5[1], %[a11] \n\t" // set top of d5 to a11 |
| |
| "vmull.u8 q3, d4, d1 \n\t" // q3 = [a01|a00] * (16-y) |
| "vmull.u8 q0, d5, d0 \n\t" // q0 = [a11|a10] * y |
| |
| "vdup.16 d5, %[x] \n\t" // duplicate x into d5 |
| "vmov.u16 d16, #16 \n\t" // set up constant in d16 |
| "vsub.u16 d3, d16, d5 \n\t" // d3 = 16-x |
| |
| "vmul.i16 d4, d7, d5 \n\t" // d4 = a01 * x |
| "vmla.i16 d4, d1, d5 \n\t" // d4 += a11 * x |
| "vmla.i16 d4, d6, d3 \n\t" // d4 += a00 * (16-x) |
| "vmla.i16 d4, d0, d3 \n\t" // d4 += a10 * (16-x) |
| "vdup.16 d3, %[scale] \n\t" // duplicate scale into d3 |
| "vshr.u16 d4, d4, #8 \n\t" // shift down result by 8 |
| "vmul.i16 d4, d4, d3 \n\t" // multiply result by scale |
| "vshrn.i16 d0, q2, #8 \n\t" // shift down result by 8 |
| "vst1.32 {d0[0]}, [%[dst]] \n\t" // store result |
| : |
| : [x] "r" (x), [y] "r" (y), [a00] "r" (a00), [a01] "r" (a01), [a10] "r" (a10), [a11] "r" (a11), [dst] "r" (dst), [scale] "r" (scale) |
| : "cc", "memory", "r4", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d16" |
| ); |
| } |
| #define Filter_32_opaque Filter_32_opaque_neon |
| #define Filter_32_alpha Filter_32_alpha_neon |
| #else |
| static inline void Filter_32_opaque_portable(unsigned x, unsigned y, |
| SkPMColor a00, SkPMColor a01, |
| SkPMColor a10, SkPMColor a11, |
| SkPMColor* dstColor) { |
| SkASSERT((unsigned)x <= 0xF); |
| SkASSERT((unsigned)y <= 0xF); |
| |
| int xy = x * y; |
| static const uint32_t mask = gMask_00FF00FF; //0xFF00FF; |
| |
| int scale = 256 - 16*y - 16*x + xy; |
| uint32_t lo = (a00 & mask) * scale; |
| uint32_t hi = ((a00 >> 8) & mask) * scale; |
| |
| scale = 16*x - xy; |
| lo += (a01 & mask) * scale; |
| hi += ((a01 >> 8) & mask) * scale; |
| |
| scale = 16*y - xy; |
| lo += (a10 & mask) * scale; |
| hi += ((a10 >> 8) & mask) * scale; |
| |
| lo += (a11 & mask) * xy; |
| hi += ((a11 >> 8) & mask) * xy; |
| |
| *dstColor = ((lo >> 8) & mask) | (hi & ~mask); |
| } |
| |
| static inline void Filter_32_alpha_portable(unsigned x, unsigned y, |
| SkPMColor a00, SkPMColor a01, |
| SkPMColor a10, SkPMColor a11, |
| SkPMColor* dstColor, |
| unsigned alphaScale) { |
| SkASSERT((unsigned)x <= 0xF); |
| SkASSERT((unsigned)y <= 0xF); |
| SkASSERT(alphaScale <= 256); |
| |
| int xy = x * y; |
| static const uint32_t mask = gMask_00FF00FF; //0xFF00FF; |
| |
| int scale = 256 - 16*y - 16*x + xy; |
| uint32_t lo = (a00 & mask) * scale; |
| uint32_t hi = ((a00 >> 8) & mask) * scale; |
| |
| scale = 16*x - xy; |
| lo += (a01 & mask) * scale; |
| hi += ((a01 >> 8) & mask) * scale; |
| |
| scale = 16*y - xy; |
| lo += (a10 & mask) * scale; |
| hi += ((a10 >> 8) & mask) * scale; |
| |
| lo += (a11 & mask) * xy; |
| hi += ((a11 >> 8) & mask) * xy; |
| |
| lo = ((lo >> 8) & mask) * alphaScale; |
| hi = ((hi >> 8) & mask) * alphaScale; |
| |
| *dstColor = ((lo >> 8) & mask) | (hi & ~mask); |
| } |
| #define Filter_32_opaque Filter_32_opaque_portable |
| #define Filter_32_alpha Filter_32_alpha_portable |
| #endif |
| |
