1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkBitmapShader16BilerpTemplate.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,245 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#include "SkFilterProc.h"
1.14 +
1.15 +class BILERP_BITMAP16_SHADER_CLASS : public HasSpan16_Sampler_BitmapShader {
1.16 +public:
1.17 + BILERP_BITMAP16_SHADER_CLASS(const SkBitmap& src)
1.18 + : HasSpan16_Sampler_BitmapShader(src, true,
1.19 + SkShader::kClamp_TileMode,
1.20 + SkShader::kClamp_TileMode)
1.21 + {
1.22 + }
1.23 +
1.24 + virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count)
1.25 + {
1.26 + SkASSERT(count > 0);
1.27 +
1.28 + U8CPU alpha = this->getPaintAlpha();
1.29 +
1.30 + const SkMatrix& inv = this->getTotalInverse();
1.31 + const SkBitmap& srcBitmap = this->getSrcBitmap();
1.32 + unsigned srcMaxX = srcBitmap.width() - 1;
1.33 + unsigned srcMaxY = srcBitmap.height() - 1;
1.34 + unsigned srcRB = srcBitmap.rowBytes();
1.35 +
1.36 + BILERP_BITMAP16_SHADER_PREAMBLE(srcBitmap);
1.37 +
1.38 + const SkFilterProc* proc_table = SkGetBilinearFilterProcTable();
1.39 + const BILERP_BITMAP16_SHADER_TYPE* srcPixels = (const BILERP_BITMAP16_SHADER_TYPE*)srcBitmap.getPixels();
1.40 +
1.41 + if (this->getInverseClass() == kPerspective_MatrixClass)
1.42 + {
1.43 + SkPerspIter iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.44 + SkIntToScalar(y) + SK_ScalarHalf, count);
1.45 + while ((count = iter.next()) != 0)
1.46 + {
1.47 + const SkFixed* srcXY = iter.getXY();
1.48 + while (--count >= 0)
1.49 + {
1.50 + SkFixed fx = *srcXY++ - SK_FixedHalf;
1.51 + SkFixed fy = *srcXY++ - SK_FixedHalf;
1.52 + int ix = fx >> 16;
1.53 + int iy = fy >> 16;
1.54 + int x = SkClampMax(ix, srcMaxX);
1.55 + int y = SkClampMax(iy, srcMaxY);
1.56 +
1.57 + const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
1.58 +
1.59 + p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels + y * srcRB)) + x;
1.60 + if ((unsigned)ix < srcMaxX)
1.61 + p01 += 1;
1.62 + p10 = p00;
1.63 + p11 = p01;
1.64 + if ((unsigned)iy < srcMaxY)
1.65 + {
1.66 + p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
1.67 + p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
1.68 + }
1.69 +
1.70 + SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
1.71 + uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
1.72 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
1.73 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
1.74 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
1.75 +
1.76 + *dstC++ = expanded_rgb16_to_8888(c, alpha);
1.77 + }
1.78 + }
1.79 + }
1.80 + else // linear case
1.81 + {
1.82 + SkFixed fx, fy, dx, dy;
1.83 +
1.84 + // now init fx, fy, dx, dy
1.85 + {
1.86 + SkPoint srcPt;
1.87 + this->getInverseMapPtProc()(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.88 + SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
1.89 +
1.90 + fx = SkScalarToFixed(srcPt.fX) - SK_FixedHalf;
1.91 + fy = SkScalarToFixed(srcPt.fY) - SK_FixedHalf;
1.92 +
1.93 + if (this->getInverseClass() == kFixedStepInX_MatrixClass)
1.94 + (void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
1.95 + else
1.96 + {
1.97 + dx = SkScalarToFixed(inv.getScaleX());
1.98 + dy = SkScalarToFixed(inv.getSkewY());
1.99 + }
1.100 + }
1.101 +
1.102 + do {
1.103 + int ix = fx >> 16;
1.104 + int iy = fy >> 16;
1.105 +
1.106 + const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
1.107 +
1.108 + p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels +
1.109 + SkClampMax(iy, srcMaxY) * srcRB)) +
1.110 + SkClampMax(ix, srcMaxX);
1.111 + if ((unsigned)ix < srcMaxX)
1.112 + p01 += 1;
1.113 + p10 = p00;
1.114 + p11 = p01;
1.115 + if ((unsigned)iy < srcMaxY)
1.116 + {
1.117 + p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
1.118 + p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
1.119 + }
1.120 +
1.121 + SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
1.122 + uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
1.123 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
1.124 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
1.125 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
1.126 + *dstC++ = expanded_rgb16_to_8888(c, alpha);
1.127 +
1.128 + fx += dx;
1.129 + fy += dy;
1.130 + } while (--count != 0);
1.131 + }
1.132 + BILERP_BITMAP16_SHADER_POSTAMBLE(srcBitmap);
1.133 + }
1.134 +
1.135 + virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count)
1.136 + {
1.137 + SkASSERT(count > 0);
1.138 +
1.139 + const SkMatrix& inv = this->getTotalInverse();
1.140 + const SkBitmap& srcBitmap = this->getSrcBitmap();
1.141 + unsigned srcMaxX = srcBitmap.width() - 1;
1.142 + unsigned srcMaxY = srcBitmap.height() - 1;
1.143 + unsigned srcRB = srcBitmap.rowBytes();
1.144 +
1.145 + BILERP_BITMAP16_SHADER_PREAMBLE(srcBitmap);
1.146 +
1.147 + const SkFilterProc* proc_table = SkGetBilinearFilterProcTable();
1.148 + const BILERP_BITMAP16_SHADER_TYPE* srcPixels = (const BILERP_BITMAP16_SHADER_TYPE*)srcBitmap.getPixels();
1.149 +
1.150 + if (this->getInverseClass() == kPerspective_MatrixClass)
1.151 + {
1.152 + SkPerspIter iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.153 + SkIntToScalar(y) + SK_ScalarHalf, count);
1.154 + while ((count = iter.next()) != 0)
1.155 + {
1.156 + const SkFixed* srcXY = iter.getXY();
1.157 + while (--count >= 0)
1.158 + {
1.159 + SkFixed fx = *srcXY++ - SK_FixedHalf;
1.160 + SkFixed fy = *srcXY++ - SK_FixedHalf;
1.161 + int ix = fx >> 16;
1.162 + int iy = fy >> 16;
1.163 +
1.164 + const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
1.165 +
1.166 + p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels +
1.167 + SkClampMax(iy, srcMaxY) * srcRB)) +
1.168 + SkClampMax(ix, srcMaxX);
1.169 + if ((unsigned)ix < srcMaxX)
1.170 + p01 += 1;
1.171 + p10 = p00;
1.172 + p11 = p01;
1.173 + if ((unsigned)iy < srcMaxY)
1.174 + {
1.175 + p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
1.176 + p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
1.177 + }
1.178 +
1.179 + SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
1.180 + uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
1.181 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
1.182 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
1.183 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
1.184 + *dstC++ = SkCompact_rgb_16(c);
1.185 + }
1.186 + }
1.187 + }
1.188 + else // linear case
1.189 + {
1.190 + SkFixed fx, fy, dx, dy;
1.191 +
1.192 + // now init fx, fy, dx, dy
1.193 + {
1.194 + SkPoint srcPt;
1.195 + this->getInverseMapPtProc()(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.196 + SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
1.197 +
1.198 + fx = SkScalarToFixed(srcPt.fX) - SK_FixedHalf;
1.199 + fy = SkScalarToFixed(srcPt.fY) - SK_FixedHalf;
1.200 +
1.201 + if (this->getInverseClass() == kFixedStepInX_MatrixClass)
1.202 + (void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
1.203 + else
1.204 + {
1.205 + dx = SkScalarToFixed(inv.getScaleX());
1.206 + dy = SkScalarToFixed(inv.getSkewY());
1.207 + }
1.208 + }
1.209 +
1.210 + do {
1.211 + int ix = fx >> 16;
1.212 + int iy = fy >> 16;
1.213 +
1.214 + const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
1.215 +
1.216 + p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels +
1.217 + SkClampMax(iy, srcMaxY) * srcRB)) +
1.218 + SkClampMax(ix, srcMaxX);
1.219 + if ((unsigned)ix < srcMaxX)
1.220 + p01 += 1;
1.221 + p10 = p00;
1.222 + p11 = p01;
1.223 + if ((unsigned)iy < srcMaxY)
1.224 + {
1.225 + p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
1.226 + p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
1.227 + }
1.228 +
1.229 + SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
1.230 + uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
1.231 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
1.232 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
1.233 + SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
1.234 + *dstC++ = SkCompact_rgb_16(c);
1.235 +
1.236 + fx += dx;
1.237 + fy += dy;
1.238 + } while (--count != 0);
1.239 + }
1.240 + BILERP_BITMAP16_SHADER_POSTAMBLE(srcBitmap);
1.241 + }
1.242 +};
1.243 +
1.244 +#undef BILERP_BITMAP16_SHADER_CLASS
1.245 +#undef BILERP_BITMAP16_SHADER_TYPE
1.246 +#undef BILERP_BITMAP16_SHADER_PREAMBLE
1.247 +#undef BILERP_BITMAP16_SHADER_PIXEL
1.248 +#undef BILERP_BITMAP16_SHADER_POSTAMBLE
