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/*
* 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 "SkBitmapProcState.h"
#include "SkColorPriv.h"
#include "SkUtils.h"
#include "SkShader.h"
#if defined(__ARM_HAVE_NEON)
#include "SkBitmapProcState_filter.h"
#endif
#if __ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN)
void SI8_D16_nofilter_DX_arm(
const SkBitmapProcState& s,
const uint32_t* SK_RESTRICT xy,
int count,
uint16_t* SK_RESTRICT colors) __attribute__((optimize("O1")));
void SI8_D16_nofilter_DX_arm(const SkBitmapProcState& s,
const uint32_t* SK_RESTRICT xy,
int count, uint16_t* SK_RESTRICT colors) {
SkASSERT(count > 0 && colors != NULL);
SkASSERT(s.fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask));
SkASSERT(s.fDoFilter == false);
const uint16_t* SK_RESTRICT table = s.fBitmap->getColorTable()->lock16BitCache();
const uint8_t* SK_RESTRICT srcAddr = (const uint8_t*)s.fBitmap->getPixels();
// buffer is y32, x16, x16, x16, x16, x16
// bump srcAddr to the proper row, since we're told Y never changes
SkASSERT((unsigned)xy[0] < (unsigned)s.fBitmap->height());
srcAddr = (const uint8_t*)((const char*)srcAddr +
xy[0] * s.fBitmap->rowBytes());
uint8_t src;
if (1 == s.fBitmap->width()) {
src = srcAddr[0];
uint16_t dstValue = table[src];
sk_memset16(colors, dstValue, count);
} else {
int i;
int count8 = count >> 3;
const uint16_t* SK_RESTRICT xx = (const uint16_t*)(xy + 1);
asm volatile (
"cmp %[count8], #0 \n\t" // compare loop counter with 0
"beq 2f \n\t" // if loop counter == 0, exit
"1: \n\t"
"ldmia %[xx]!, {r5, r7, r9, r11} \n\t" // load ptrs to pixels 0-7
"subs %[count8], %[count8], #1 \n\t" // decrement loop counter
"uxth r4, r5 \n\t" // extract ptr 0
"mov r5, r5, lsr #16 \n\t" // extract ptr 1
"uxth r6, r7 \n\t" // extract ptr 2
"mov r7, r7, lsr #16 \n\t" // extract ptr 3
"ldrb r4, [%[srcAddr], r4] \n\t" // load pixel 0 from image
"uxth r8, r9 \n\t" // extract ptr 4
"ldrb r5, [%[srcAddr], r5] \n\t" // load pixel 1 from image
"mov r9, r9, lsr #16 \n\t" // extract ptr 5
"ldrb r6, [%[srcAddr], r6] \n\t" // load pixel 2 from image
"uxth r10, r11 \n\t" // extract ptr 6
"ldrb r7, [%[srcAddr], r7] \n\t" // load pixel 3 from image
"mov r11, r11, lsr #16 \n\t" // extract ptr 7
"ldrb r8, [%[srcAddr], r8] \n\t" // load pixel 4 from image
"add r4, r4, r4 \n\t" // double pixel 0 for RGB565 lookup
"ldrb r9, [%[srcAddr], r9] \n\t" // load pixel 5 from image
"add r5, r5, r5 \n\t" // double pixel 1 for RGB565 lookup
"ldrb r10, [%[srcAddr], r10] \n\t" // load pixel 6 from image
"add r6, r6, r6 \n\t" // double pixel 2 for RGB565 lookup
"ldrb r11, [%[srcAddr], r11] \n\t" // load pixel 7 from image
"add r7, r7, r7 \n\t" // double pixel 3 for RGB565 lookup
"ldrh r4, [%[table], r4] \n\t" // load pixel 0 RGB565 from colmap
"add r8, r8, r8 \n\t" // double pixel 4 for RGB565 lookup
"ldrh r5, [%[table], r5] \n\t" // load pixel 1 RGB565 from colmap
"add r9, r9, r9 \n\t" // double pixel 5 for RGB565 lookup
"ldrh r6, [%[table], r6] \n\t" // load pixel 2 RGB565 from colmap
"add r10, r10, r10 \n\t" // double pixel 6 for RGB565 lookup
"ldrh r7, [%[table], r7] \n\t" // load pixel 3 RGB565 from colmap
"add r11, r11, r11 \n\t" // double pixel 7 for RGB565 lookup
"ldrh r8, [%[table], r8] \n\t" // load pixel 4 RGB565 from colmap
"ldrh r9, [%[table], r9] \n\t" // load pixel 5 RGB565 from colmap
"ldrh r10, [%[table], r10] \n\t" // load pixel 6 RGB565 from colmap
"ldrh r11, [%[table], r11] \n\t" // load pixel 7 RGB565 from colmap
"pkhbt r5, r4, r5, lsl #16 \n\t" // pack pixels 0 and 1
"pkhbt r6, r6, r7, lsl #16 \n\t" // pack pixels 2 and 3
"pkhbt r8, r8, r9, lsl #16 \n\t" // pack pixels 4 and 5
"pkhbt r10, r10, r11, lsl #16 \n\t" // pack pixels 6 and 7
"stmia %[colors]!, {r5, r6, r8, r10} \n\t" // store last 8 pixels
"bgt 1b \n\t" // loop if counter > 0
"2: \n\t"
: [xx] "+r" (xx), [count8] "+r" (count8), [colors] "+r" (colors)
: [table] "r" (table), [srcAddr] "r" (srcAddr)
: "memory", "cc", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11"
);
for (i = (count & 7); i > 0; --i) {
src = srcAddr[*xx++]; *colors++ = table[src];
}
}
s.fBitmap->getColorTable()->unlock16BitCache();
}
void SI8_opaque_D32_nofilter_DX_arm(
const SkBitmapProcState& s,
const uint32_t* SK_RESTRICT xy,
int count,
SkPMColor* SK_RESTRICT colors) __attribute__((optimize("O1")));
void SI8_opaque_D32_nofilter_DX_arm(const SkBitmapProcState& s,
const uint32_t* SK_RESTRICT xy,
int count, SkPMColor* SK_RESTRICT colors) {
SkASSERT(count > 0 && colors != NULL);
SkASSERT(s.fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask));
SkASSERT(s.fDoFilter == false);
const SkPMColor* SK_RESTRICT table = s.fBitmap->getColorTable()->lockColors();
const uint8_t* SK_RESTRICT srcAddr = (const uint8_t*)s.fBitmap->getPixels();
// buffer is y32, x16, x16, x16, x16, x16
// bump srcAddr to the proper row, since we're told Y never changes
SkASSERT((unsigned)xy[0] < (unsigned)s.fBitmap->height());
srcAddr = (const uint8_t*)((const char*)srcAddr + xy[0] * s.fBitmap->rowBytes());
if (1 == s.fBitmap->width()) {
uint8_t src = srcAddr[0];
SkPMColor dstValue = table[src];
sk_memset32(colors, dstValue, count);
} else {
const uint16_t* xx = (const uint16_t*)(xy + 1);
asm volatile (
"subs %[count], %[count], #8 \n\t" // decrement count by 8, set flags
"blt 2f \n\t" // if count < 0, branch to singles
"1: \n\t" // eights loop
"ldmia %[xx]!, {r5, r7, r9, r11} \n\t" // load ptrs to pixels 0-7
"uxth r4, r5 \n\t" // extract ptr 0
"mov r5, r5, lsr #16 \n\t" // extract ptr 1
"uxth r6, r7 \n\t" // extract ptr 2
"mov r7, r7, lsr #16 \n\t" // extract ptr 3
"ldrb r4, [%[srcAddr], r4] \n\t" // load pixel 0 from image
"uxth r8, r9 \n\t" // extract ptr 4
"ldrb r5, [%[srcAddr], r5] \n\t" // load pixel 1 from image
"mov r9, r9, lsr #16 \n\t" // extract ptr 5
"ldrb r6, [%[srcAddr], r6] \n\t" // load pixel 2 from image
"uxth r10, r11 \n\t" // extract ptr 6
"ldrb r7, [%[srcAddr], r7] \n\t" // load pixel 3 from image
"mov r11, r11, lsr #16 \n\t" // extract ptr 7
"ldrb r8, [%[srcAddr], r8] \n\t" // load pixel 4 from image
"ldrb r9, [%[srcAddr], r9] \n\t" // load pixel 5 from image
"ldrb r10, [%[srcAddr], r10] \n\t" // load pixel 6 from image
"ldrb r11, [%[srcAddr], r11] \n\t" // load pixel 7 from image
"ldr r4, [%[table], r4, lsl #2] \n\t" // load pixel 0 SkPMColor from colmap
"ldr r5, [%[table], r5, lsl #2] \n\t" // load pixel 1 SkPMColor from colmap
"ldr r6, [%[table], r6, lsl #2] \n\t" // load pixel 2 SkPMColor from colmap
"ldr r7, [%[table], r7, lsl #2] \n\t" // load pixel 3 SkPMColor from colmap
"ldr r8, [%[table], r8, lsl #2] \n\t" // load pixel 4 SkPMColor from colmap
"ldr r9, [%[table], r9, lsl #2] \n\t" // load pixel 5 SkPMColor from colmap
"ldr r10, [%[table], r10, lsl #2] \n\t" // load pixel 6 SkPMColor from colmap
"ldr r11, [%[table], r11, lsl #2] \n\t" // load pixel 7 SkPMColor from colmap
"subs %[count], %[count], #8 \n\t" // decrement loop counter
"stmia %[colors]!, {r4-r11} \n\t" // store 8 pixels
"bge 1b \n\t" // loop if counter >= 0
"2: \n\t"
"adds %[count], %[count], #8 \n\t" // fix up counter, set flags
"beq 4f \n\t" // if count == 0, branch to exit
"3: \n\t" // singles loop
"ldrh r4, [%[xx]], #2 \n\t" // load pixel ptr
"subs %[count], %[count], #1 \n\t" // decrement loop counter
"ldrb r5, [%[srcAddr], r4] \n\t" // load pixel from image
"ldr r6, [%[table], r5, lsl #2] \n\t" // load SkPMColor from colmap
"str r6, [%[colors]], #4 \n\t" // store pixel, update ptr
"bne 3b \n\t" // loop if counter != 0
"4: \n\t" // exit
: [xx] "+r" (xx), [count] "+r" (count), [colors] "+r" (colors)
: [table] "r" (table), [srcAddr] "r" (srcAddr)
: "memory", "cc", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11"
);
}
s.fBitmap->getColorTable()->unlockColors(false);
}
#endif //__ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN)
#if defined(__ARM_HAVE_NEON) && defined(SK_CPU_LENDIAN)
void Clamp_S32_opaque_D32_filter_DX_shaderproc(const SkBitmapProcState& s, int x, int y,
SkPMColor* SK_RESTRICT colors, int count) {
SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
SkMatrix::kScale_Mask)) == 0);
SkASSERT(s.fInvKy == 0);
SkASSERT(count > 0 && colors != NULL);
SkASSERT(s.fDoFilter);
SkDEBUGCODE(SkASSERT(s.fBitmap->config() == SkBitmap::kARGB_8888_Config); SkASSERT(s.fAlphaScale == 256);)
const unsigned maxX = s.fBitmap->width() - 1;
const SkFixed oneX = s.fFilterOneX;
const SkFixed dx = s.fInvSx;
SkFixed fx;
const SkPMColor* SK_RESTRICT row0;
const SkPMColor* SK_RESTRICT row1;
unsigned subY;
{
SkPoint pt;
s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
SkIntToScalar(y) + SK_ScalarHalf, &pt);
SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1);
const unsigned maxY = s.fBitmap->height() - 1;
// compute our two Y values up front
subY = (((fy) >> 12) & 0xF);
int y0 = SkClampMax((fy) >> 16, maxY);
int y1 = SkClampMax((fy + s.fFilterOneY) >> 16, maxY);
const char* SK_RESTRICT srcAddr = (const char*)s.fBitmap->getPixels();
unsigned rb = s.fBitmap->rowBytes();
row0 = (const SkPMColor*)(srcAddr + y0 * rb);
row1 = (const SkPMColor*)(srcAddr + y1 * rb);
// now initialize fx
fx = SkScalarToFixed(pt.fX) - (oneX >> 1);
}
do {
// Check if we can do the next four pixels using ARM NEON asm
if ((count >= 4) &&
(((dx >= 0) && (fx >= 0) && (((fx + 3 * dx) >> 16) < (const signed)maxX)) ||
((dx < 0) && ((fx >> 16) < (const signed)maxX) && (((fx + 3 * dx) >> 16) >= 0)))) {
int asm_count;
// How many iterations can we do while still clamped?
if (dx >= 0) {
asm_count = (((((const signed)maxX - 1) << 16) - fx) / dx) >> 2;
} else {
asm_count = ((0 - fx) / dx) >> 2;
}
if (asm_count <= 0) {
asm_count = 1;
} else if ((asm_count << 2) > count) {
asm_count = count >> 2;
}
count -= asm_count << 2;
// We know that oneX is 1.0 since we are running clamped.
// This means that we can load both x0 and x1 pixels in one go.
asm volatile (
// Setup constants
"rsb r8, %[subY], #16 \n\t" // 16 - subY
"vdup.8 d30, %[subY] \n\t" // Create constant for subY
"vdup.8 d31, r8 \n\t" // Create constant for 16 - subY
"vmov.u16 d29, #16 \n\t" // Create constant for 16
"1: \n\t" // Loop start
// Pre-load pixel #1
"asr r7, %[fx], #16 \n\t" // Calculate offset fx >> 16
"lsl r7, r7, #2 \n\t" // Adjust offset for 32-bit RGBA values
"add r8, %[row0], r7 \n\t" // Calculate address for row0
"vld1.32 {d0}, [r8] \n\t" // Load two RGBA pixels from row0
"add r7, %[row1], r7 \n\t" // Calculate address for row1
"vld1.32 {d1}, [r7] \n\t" // Load two RGBA pixels from row1
"subs %[cnt], %[cnt], #1 \n\t" // Decrement loop counter
// Calculate pixel #1 and pre-load #2
"lsr r8, %[fx], #12 \n\t" // Calculate subX = ((fx >> 12) & 0xF)
"and r8, r8, #0xF \n\t" //
"add %[fx], %[fx], %[dx] \n\t" // Move fx to next position
"vdup.16 d28, r8 \n\t" // subX
"vmull.u8 q1, d0, d31 \n\t" // q1 = [a00|a01] * (16 - y)
"vmull.u8 q2, d1, d30 \n\t" // q2 = [a10|a11] * y
"asr r7, %[fx], #16 \n\t" // Calculate offset fx >> 16
"lsl r7, r7, #2 \n\t" // Adjust offset for 32-bit RGBA values
"add r8, %[row0], r7 \n\t" // Calculate next address for row0
"add r7, %[row1], r7 \n\t" // Calculate next address for row1
"vld1.32 {d0}, [r8] \n\t" // Load next two RGBA pixels from row0
"vmul.i16 d16, d3, d28 \n\t" // d16 = a01 * x
"vmla.i16 d16, d5, d28 \n\t" // d16 += a11 * x
"vld1.32 {d1}, [r7] \n\t" // Load next two RGBA pixels from row1
"vsub.i16 d27, d29, d28 \n\t" // 16 - subX
"vmla.i16 d16, d2, d27 \n\t" // d16 += a00 * (16 - x)
"vmla.i16 d16, d4, d27 \n\t" // d16 += a10 * (16 - x)
// Calculate pixel #2 and pre-load #3
"lsr r8, %[fx], #12 \n\t" // Calculate subX = ((fx >> 12) & 0xF)
"and r8, r8, #0xF \n\t" //
"add %[fx], %[fx], %[dx] \n\t" // Move fx to next position
"vdup.16 d28, r8 \n\t" // subX
"vmull.u8 q1, d0, d31 \n\t" // q1 = [a00|a01] * (16 - y)
"vmull.u8 q2, d1, d30 \n\t" // q2 = [a10|a11] * y
"asr r7, %[fx], #16 \n\t" // Calculate offset fx >> 16
"lsl r7, r7, #2 \n\t" // Adjust offset for 32-bit RGBA values
"add r8, %[row0], r7 \n\t" // Calculate next address for row0
"add r7, %[row1], r7 \n\t" // Calculate next address for row1
"vld1.32 {d0}, [r8] \n\t" // Load next two RGBA pixels from row0
"vmul.i16 d17, d3, d28 \n\t" // d17 = a01 * x
"vmla.i16 d17, d5, d28 \n\t" // d17 += a11 * x
"vld1.32 {d1}, [r7] \n\t" // Load next two RGBA pixels from row1
"vsub.i16 d27, d29, d28 \n\t" // 16 - subX
"vmla.i16 d17, d2, d27 \n\t" // d17 += a00 * (16 - x)
"vmla.i16 d17, d4, d27 \n\t" // d17 += a10 * (16 - x)
// Calculate pixel #3 and pre-load #4
"lsr r8, %[fx], #12 \n\t" // Calculate subX = ((fx >> 12) & 0xF)
"and r8, r8, #0xF \n\t" //
"add %[fx], %[fx], %[dx] \n\t" // Move fx to next position
"vdup.16 d28, r8 \n\t" // subX
"vmull.u8 q1, d0, d31 \n\t" // q1 = [a00|a01] * (16 - y)
"vmull.u8 q2, d1, d30 \n\t" // q2 = [a10|a11] * y
"vshrn.i16 d16, q8, #8 \n\t" // shift down result by 8
"asr r7, %[fx], #16 \n\t" // Calculate offset fx >> 16
"lsl r7, r7, #2 \n\t" // Adjust offset for 32-bit RGBA values
"add r8, %[row0], r7 \n\t" // Calculate next address for row0
"add r7, %[row1], r7 \n\t" // Calculate next address for row1
"vld1.32 {d0}, [r8] \n\t" // Load next two RGBA pixels from row0
"vmul.i16 d18, d3, d28 \n\t" // d18 = a01 * x
"vmla.i16 d18, d5, d28 \n\t" // d18 += a11 * x
"vld1.32 {d1}, [r7] \n\t" // Load next two RGBA pixels from row1
"vsub.i16 d27, d29, d28 \n\t" // 16 - subX
"vmla.i16 d18, d2, d27 \n\t" // d18 += a00 * (16 - x)
"vmla.i16 d18, d4, d27 \n\t" // d18 += a10 * (16 - x)
// Calculate pixel #4
"vmull.u8 q1, d0, d31 \n\t" // q1 = [a00|a01] * (16 - y)
"vmull.u8 q2, d1, d30 \n\t" // q2 = [a10|a11] * y
"lsr r8, %[fx], #12 \n\t" // Calculate subX = ((fx >> 12) & 0xF)
"and r8, r8, #0xF \n\t" //
"add %[fx], %[fx], %[dx] \n\t" // Move fx to next position
"vdup.16 d28, r8 \n\t" // subX
"vmul.i16 d19, d3, d28 \n\t" // d19 = a01 * x
"vmla.i16 d19, d5, d28 \n\t" // d19 += a11 * x
"vsub.i16 d27, d29, d28 \n\t" // 16 - subX
"vmla.i16 d19, d2, d27 \n\t" // d19 += a00 * (16 - x)
"vmla.i16 d19, d4, d27 \n\t" // d19 += a10 * (16 - x)
"vshrn.i16 d17, q9, #8 \n\t" // shift down result by 8
"vst1.32 {d16-d17}, [%[colors]]! \n\t" // Write result to memory
"bne 1b \n\t"
: [fx] "+r" (fx), [colors] "+r" (colors), [cnt] "+r" (asm_count)
: [row0] "r" (row0), [row1] "r" (row1), [subY] "r" (subY), [dx] "r" (dx)
: "cc", "memory", "r7", "r8", "d0", "d1", "d2", "d3", "d4", "d5", "d16", "d17", "d18", "d19", "d27", "d28", "d29", "d30", "d31"
);
} else {
unsigned subX = (((fx) >> 12) & 0xF);
unsigned x0 = SkClampMax((fx) >> 16, maxX);
unsigned x1 = SkClampMax((fx + oneX) >> 16, maxX);
Filter_32_opaque(subX, subY,
row0[x0],
row0[x1],
row1[x0],
row1[x1],
colors);
colors += 1;
fx += dx;
count--;
}
} while (count != 0);
}
#endif
///////////////////////////////////////////////////////////////////////////////
/* If we replace a sampleproc, then we null-out the associated shaderproc,
otherwise the shader won't even look at the matrix/sampler
*/
void SkBitmapProcState::platformProcs() {
bool doFilter = fDoFilter;
bool isOpaque = 256 == fAlphaScale;
bool justDx = (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask));
bool clamp_clamp = ((SkShader::kClamp_TileMode == fTileModeX) &&
(SkShader::kClamp_TileMode == fTileModeY));
switch (fBitmap->config()) {
case SkBitmap::kIndex8_Config:
#if __ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN)
if (justDx && !doFilter) {
#if 0 /* crashing on android device */
fSampleProc16 = SI8_D16_nofilter_DX_arm;
fShaderProc16 = NULL;
#endif
if (isOpaque) {
// this one is only very slighty faster than the C version
fSampleProc32 = SI8_opaque_D32_nofilter_DX_arm;
fShaderProc32 = NULL;
}
}
#endif
break;
case SkBitmap::kARGB_8888_Config:
#if defined(__ARM_HAVE_NEON) && defined(SK_CPU_LENDIAN)
if (S32_opaque_D32_filter_DX == fSampleProc32 && clamp_clamp) {
fShaderProc32 = Clamp_S32_opaque_D32_filter_DX_shaderproc;
}
#endif
break;
default:
break;
}
}
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