src/third_party/skia/src/opts/SkBitmapProcState_opts_arm.cpp

   1 /*
   2  * Copyright 2009 The Android Open Source Project
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8
   9 #include "SkBitmapScaler.h"
  10 #include "SkBitmapProcState.h"
  11 #include "SkColorPriv.h"
  12 #include "SkPaint.h"
  13 #include "SkTypes.h"
  14 #include "SkUtils.h"
  15 #include "SkUtilsArm.h"
  16
  17 #include "SkConvolver.h"
  18
  19 #if !defined(SK_CPU_ARM64) && SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN)
  20 void SI8_D16_nofilter_DX_arm(
  21     const SkBitmapProcState& s,
  22     const uint32_t* SK_RESTRICT xy,
  23     int count,
  24     uint16_t* SK_RESTRICT colors) SK_ATTRIBUTE_OPTIMIZE_O1;
  25
  26 void SI8_D16_nofilter_DX_arm(const SkBitmapProcState& s,
  27                              const uint32_t* SK_RESTRICT xy,
  28                              int count, uint16_t* SK_RESTRICT colors) {
  29     SkASSERT(count > 0 && colors != NULL);
  30     SkASSERT(s.fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask));
  31     SkASSERT(SkPaint::kNone_FilterLevel == s.fFilterLevel);
  32
  33     const uint16_t* SK_RESTRICT table = s.fBitmap->getColorTable()->lock16BitCache();
  34     const uint8_t* SK_RESTRICT srcAddr = (const uint8_t*)s.fBitmap->getPixels();
  35
  36     // buffer is y32, x16, x16, x16, x16, x16
  37     // bump srcAddr to the proper row, since we're told Y never changes
  38     SkASSERT((unsigned)xy[0] < (unsigned)s.fBitmap->height());
  39     srcAddr = (const uint8_t*)((const char*)srcAddr +
  40                                xy[0] * s.fBitmap->rowBytes());
  41
  42     uint8_t src;
  43
  44     if (1 == s.fBitmap->width()) {
  45         src = srcAddr[0];
  46         uint16_t dstValue = table[src];
  47         sk_memset16(colors, dstValue, count);
  48     } else {
  49         int i;
  50         int count8 = count >> 3;
  51         const uint16_t* SK_RESTRICT xx = (const uint16_t*)(xy + 1);
  52
  53         asm volatile (
  54             "cmp        %[count8], #0                  \n\t"  // compare loop counter with 0
  55             "beq        2f                             \n\t"  // if loop counter == 0, exit
  56             "1:                                        \n\t"
  57             "ldmia      %[xx]!, {r5, r7, r9, r11}      \n\t"  // load ptrs to pixels 0-7
  58             "subs       %[count8], %[count8], #1       \n\t"  // decrement loop counter
  59             "uxth       r4, r5                         \n\t"  // extract ptr 0
  60             "mov        r5, r5, lsr #16                \n\t"  // extract ptr 1
  61             "uxth       r6, r7                         \n\t"  // extract ptr 2
  62             "mov        r7, r7, lsr #16                \n\t"  // extract ptr 3
  63             "ldrb       r4, [%[srcAddr], r4]           \n\t"  // load pixel 0 from image
  64             "uxth       r8, r9                         \n\t"  // extract ptr 4
  65             "ldrb       r5, [%[srcAddr], r5]           \n\t"  // load pixel 1 from image
  66             "mov        r9, r9, lsr #16                \n\t"  // extract ptr 5
  67             "ldrb       r6, [%[srcAddr], r6]           \n\t"  // load pixel 2 from image
  68             "uxth       r10, r11                       \n\t"  // extract ptr 6
  69             "ldrb       r7, [%[srcAddr], r7]           \n\t"  // load pixel 3 from image
  70             "mov        r11, r11, lsr #16              \n\t"  // extract ptr 7
  71             "ldrb       r8, [%[srcAddr], r8]           \n\t"  // load pixel 4 from image
  72             "add        r4, r4, r4                     \n\t"  // double pixel 0 for RGB565 lookup
  73             "ldrb       r9, [%[srcAddr], r9]           \n\t"  // load pixel 5 from image
  74             "add        r5, r5, r5                     \n\t"  // double pixel 1 for RGB565 lookup
  75             "ldrb       r10, [%[srcAddr], r10]         \n\t"  // load pixel 6 from image
  76             "add        r6, r6, r6                     \n\t"  // double pixel 2 for RGB565 lookup
  77             "ldrb       r11, [%[srcAddr], r11]         \n\t"  // load pixel 7 from image
  78             "add        r7, r7, r7                     \n\t"  // double pixel 3 for RGB565 lookup
  79             "ldrh       r4, [%[table], r4]             \n\t"  // load pixel 0 RGB565 from colmap
  80             "add        r8, r8, r8                     \n\t"  // double pixel 4 for RGB565 lookup
  81             "ldrh       r5, [%[table], r5]             \n\t"  // load pixel 1 RGB565 from colmap
  82             "add        r9, r9, r9                     \n\t"  // double pixel 5 for RGB565 lookup
  83             "ldrh       r6, [%[table], r6]             \n\t"  // load pixel 2 RGB565 from colmap
  84             "add        r10, r10, r10                  \n\t"  // double pixel 6 for RGB565 lookup
  85             "ldrh       r7, [%[table], r7]             \n\t"  // load pixel 3 RGB565 from colmap
  86             "add        r11, r11, r11                  \n\t"  // double pixel 7 for RGB565 lookup
  87             "ldrh       r8, [%[table], r8]             \n\t"  // load pixel 4 RGB565 from colmap
  88             "ldrh       r9, [%[table], r9]             \n\t"  // load pixel 5 RGB565 from colmap
  89             "ldrh       r10, [%[table], r10]           \n\t"  // load pixel 6 RGB565 from colmap
  90             "ldrh       r11, [%[table], r11]           \n\t"  // load pixel 7 RGB565 from colmap
  91             "pkhbt      r5, r4, r5, lsl #16            \n\t"  // pack pixels 0 and 1
  92             "pkhbt      r6, r6, r7, lsl #16            \n\t"  // pack pixels 2 and 3
  93             "pkhbt      r8, r8, r9, lsl #16            \n\t"  // pack pixels 4 and 5
  94             "pkhbt      r10, r10, r11, lsl #16         \n\t"  // pack pixels 6 and 7
  95             "stmia      %[colors]!, {r5, r6, r8, r10}  \n\t"  // store last 8 pixels
  96             "bgt        1b                             \n\t"  // loop if counter > 0
  97             "2:                                        \n\t"
  98             : [xx] "+r" (xx), [count8] "+r" (count8), [colors] "+r" (colors)
  99             : [table] "r" (table), [srcAddr] "r" (srcAddr)
 100             : "memory", "cc", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11"
 101         );
 102
 103         for (i = (count & 7); i > 0; --i) {
 104             src = srcAddr[*xx++]; *colors++ = table[src];
 105         }
 106     }
 107
 108     s.fBitmap->getColorTable()->unlock16BitCache();
 109 }
 110
 111 void SI8_opaque_D32_nofilter_DX_arm(
 112     const SkBitmapProcState& s,
 113     const uint32_t* SK_RESTRICT xy,
 114     int count,
 115     SkPMColor* SK_RESTRICT colors) SK_ATTRIBUTE_OPTIMIZE_O1;
 116
 117 void SI8_opaque_D32_nofilter_DX_arm(const SkBitmapProcState& s,
 118                                     const uint32_t* SK_RESTRICT xy,
 119                                     int count, SkPMColor* SK_RESTRICT colors) {
 120     SkASSERT(count > 0 && colors != NULL);
 121     SkASSERT(s.fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask));
 122     SkASSERT(SkPaint::kNone_FilterLevel == s.fFilterLevel);
 123
 124     const SkPMColor* SK_RESTRICT table = s.fBitmap->getColorTable()->lockColors();
 125     const uint8_t* SK_RESTRICT srcAddr = (const uint8_t*)s.fBitmap->getPixels();
 126
 127     // buffer is y32, x16, x16, x16, x16, x16
 128     // bump srcAddr to the proper row, since we're told Y never changes
 129     SkASSERT((unsigned)xy[0] < (unsigned)s.fBitmap->height());
 130     srcAddr = (const uint8_t*)((const char*)srcAddr + xy[0] * s.fBitmap->rowBytes());
 131
 132     if (1 == s.fBitmap->width()) {
 133         uint8_t src = srcAddr[0];
 134         SkPMColor dstValue = table[src];
 135         sk_memset32(colors, dstValue, count);
 136     } else {
 137         const uint16_t* xx = (const uint16_t*)(xy + 1);
 138
 139         asm volatile (
 140             "subs       %[count], %[count], #8        \n\t"   // decrement count by 8, set flags
 141             "blt        2f                            \n\t"   // if count < 0, branch to singles
 142             "1:                                       \n\t"   // eights loop
 143             "ldmia      %[xx]!, {r5, r7, r9, r11}     \n\t"   // load ptrs to pixels 0-7
 144             "uxth       r4, r5                        \n\t"   // extract ptr 0
 145             "mov        r5, r5, lsr #16               \n\t"   // extract ptr 1
 146             "uxth       r6, r7                        \n\t"   // extract ptr 2
 147             "mov        r7, r7, lsr #16               \n\t"   // extract ptr 3
 148             "ldrb       r4, [%[srcAddr], r4]          \n\t"   // load pixel 0 from image
 149             "uxth       r8, r9                        \n\t"   // extract ptr 4
 150             "ldrb       r5, [%[srcAddr], r5]          \n\t"   // load pixel 1 from image
 151             "mov        r9, r9, lsr #16               \n\t"   // extract ptr 5
 152             "ldrb       r6, [%[srcAddr], r6]          \n\t"   // load pixel 2 from image
 153             "uxth       r10, r11                      \n\t"   // extract ptr 6
 154             "ldrb       r7, [%[srcAddr], r7]          \n\t"   // load pixel 3 from image
 155             "mov        r11, r11, lsr #16             \n\t"   // extract ptr 7
 156             "ldrb       r8, [%[srcAddr], r8]          \n\t"   // load pixel 4 from image
 157             "ldrb       r9, [%[srcAddr], r9]          \n\t"   // load pixel 5 from image
 158             "ldrb       r10, [%[srcAddr], r10]        \n\t"   // load pixel 6 from image
 159             "ldrb       r11, [%[srcAddr], r11]        \n\t"   // load pixel 7 from image
 160             "ldr        r4, [%[table], r4, lsl #2]    \n\t"   // load pixel 0 SkPMColor from colmap
 161             "ldr        r5, [%[table], r5, lsl #2]    \n\t"   // load pixel 1 SkPMColor from colmap
 162             "ldr        r6, [%[table], r6, lsl #2]    \n\t"   // load pixel 2 SkPMColor from colmap
 163             "ldr        r7, [%[table], r7, lsl #2]    \n\t"   // load pixel 3 SkPMColor from colmap
 164             "ldr        r8, [%[table], r8, lsl #2]    \n\t"   // load pixel 4 SkPMColor from colmap
 165             "ldr        r9, [%[table], r9, lsl #2]    \n\t"   // load pixel 5 SkPMColor from colmap
 166             "ldr        r10, [%[table], r10, lsl #2]  \n\t"   // load pixel 6 SkPMColor from colmap
 167             "ldr        r11, [%[table], r11, lsl #2]  \n\t"   // load pixel 7 SkPMColor from colmap
 168             "subs       %[count], %[count], #8        \n\t"   // decrement loop counter
 169             "stmia      %[colors]!, {r4-r11}          \n\t"   // store 8 pixels
 170             "bge        1b                            \n\t"   // loop if counter >= 0
 171             "2:                                       \n\t"
 172             "adds       %[count], %[count], #8        \n\t"   // fix up counter, set flags
 173             "beq        4f                            \n\t"   // if count == 0, branch to exit
 174             "3:                                       \n\t"   // singles loop
 175             "ldrh       r4, [%[xx]], #2               \n\t"   // load pixel ptr
 176             "subs       %[count], %[count], #1        \n\t"   // decrement loop counter
 177             "ldrb       r5, [%[srcAddr], r4]          \n\t"   // load pixel from image
 178             "ldr        r6, [%[table], r5, lsl #2]    \n\t"   // load SkPMColor from colmap
 179             "str        r6, [%[colors]], #4           \n\t"   // store pixel, update ptr
 180             "bne        3b                            \n\t"   // loop if counter != 0
 181             "4:                                       \n\t"   // exit
 182             : [xx] "+r" (xx), [count] "+r" (count), [colors] "+r" (colors)
 183             : [table] "r" (table), [srcAddr] "r" (srcAddr)
 184             : "memory", "cc", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11"
 185         );
 186     }
 187
 188     s.fBitmap->getColorTable()->unlockColors();
 189 }
 190 #endif // !defined(SK_CPU_ARM64) && SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN)
 191
 192 ///////////////////////////////////////////////////////////////////////////////
 193
 194 /*  If we replace a sampleproc, then we null-out the associated shaderproc,
 195     otherwise the shader won't even look at the matrix/sampler
 196  */
 197 void SkBitmapProcState::platformProcs() {
 198 #if !defined(SK_CPU_ARM64) && SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN)
 199     bool isOpaque = 256 == fAlphaScale;
 200     bool justDx = false;
 201
 202     if (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) {
 203         justDx = true;
 204     }
 205
 206     switch (fBitmap->colorType()) {
 207         case kIndex_8_SkColorType:
 208             if (justDx && SkPaint::kNone_FilterLevel == fFilterLevel) {
 209 #if 0   /* crashing on android device */
 210                 fSampleProc16 = SI8_D16_nofilter_DX_arm;
 211                 fShaderProc16 = NULL;
 212 #endif
 213                 if (isOpaque) {
 214                     // this one is only very slighty faster than the C version
 215                     fSampleProc32 = SI8_opaque_D32_nofilter_DX_arm;
 216                     fShaderProc32 = NULL;
 217                 }
 218             }
 219             break;
 220         default:
 221             break;
 222     }
 223 #endif
 224 }
 225
 226 ///////////////////////////////////////////////////////////////////////////////
 227
 228 extern void platformConvolutionProcs_arm_neon(SkConvolutionProcs* procs);
 229
 230 void platformConvolutionProcs_arm(SkConvolutionProcs* procs) {
 231 }
 232
 233 void SkBitmapScaler::PlatformConvolutionProcs(SkConvolutionProcs* procs) {
 234     SK_ARM_NEON_WRAP(platformConvolutionProcs_arm)(procs);
 235 }