1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkBitmapShaderTemplate.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,306 @@
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 +
1.14 +#ifndef NOFILTER_BITMAP_SHADER_PREAMBLE
1.15 + #define NOFILTER_BITMAP_SHADER_PREAMBLE(bitmap, rb)
1.16 +#endif
1.17 +#ifndef NOFILTER_BITMAP_SHADER_POSTAMBLE
1.18 + #define NOFILTER_BITMAP_SHADER_POSTAMBLE(bitmap)
1.19 +#endif
1.20 +#ifndef NOFILTER_BITMAP_SHADER_PREAMBLE16
1.21 + #define NOFILTER_BITMAP_SHADER_PREAMBLE16(bitmap, rb)
1.22 +#endif
1.23 +#ifndef NOFILTER_BITMAP_SHADER_POSTAMBLE16
1.24 + #define NOFILTER_BITMAP_SHADER_POSTAMBLE16(bitmap)
1.25 +#endif
1.26 +
1.27 +class NOFILTER_BITMAP_SHADER_CLASS : public HasSpan16_Sampler_BitmapShader {
1.28 +public:
1.29 + NOFILTER_BITMAP_SHADER_CLASS(const SkBitmap& src)
1.30 + : HasSpan16_Sampler_BitmapShader(src, false,
1.31 + NOFILTER_BITMAP_SHADER_TILEMODE,
1.32 + NOFILTER_BITMAP_SHADER_TILEMODE)
1.33 + {
1.34 + }
1.35 +
1.36 + virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix)
1.37 + {
1.38 + if (!this->INHERITED::setContext(device, paint, matrix))
1.39 + return false;
1.40 +
1.41 +#ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.42 + this->computeUnitInverse();
1.43 +#endif
1.44 + return true;
1.45 + }
1.46 +
1.47 + virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count)
1.48 + {
1.49 + SkASSERT(count > 0);
1.50 +
1.51 +#ifdef NOFILTER_BITMAP_SHADER_SPRITEPROC32
1.52 + if ((this->getTotalInverse().getType() & ~SkMatrix::kTranslate_Mask) == 0)
1.53 + {
1.54 + NOFILTER_BITMAP_SHADER_SPRITEPROC32(this, x, y, dstC, count);
1.55 + return;
1.56 + }
1.57 +#endif
1.58 +
1.59 + unsigned scale = SkAlpha255To256(this->getPaintAlpha());
1.60 +#ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.61 + const SkMatrix& inv = this->getUnitInverse();
1.62 + SkMatrix::MapPtProc invProc = this->getUnitInverseProc();
1.63 +#else
1.64 + const SkMatrix& inv = this->getTotalInverse();
1.65 + SkMatrix::MapPtProc invProc = this->getInverseMapPtProc();
1.66 +#endif
1.67 + const SkBitmap& srcBitmap = this->getSrcBitmap();
1.68 + unsigned srcMaxX = srcBitmap.width() - 1;
1.69 + unsigned srcMaxY = srcBitmap.height() - 1;
1.70 + unsigned srcRB = srcBitmap.rowBytes();
1.71 + SkFixed fx, fy, dx, dy;
1.72 +
1.73 + const NOFILTER_BITMAP_SHADER_TYPE* srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)srcBitmap.getPixels();
1.74 + NOFILTER_BITMAP_SHADER_PREAMBLE(srcBitmap, srcRB);
1.75 +
1.76 + if (this->getInverseClass() == kPerspective_MatrixClass)
1.77 + {
1.78 + SkPerspIter iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.79 + SkIntToScalar(y) + SK_ScalarHalf, count);
1.80 + while ((count = iter.next()) != 0)
1.81 + {
1.82 + const SkFixed* srcXY = iter.getXY();
1.83 +
1.84 +/* Do I need this?
1.85 +#ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.86 + fx >>= level;
1.87 + fy >>= level;
1.88 +#endif
1.89 +*/
1.90 + if (256 == scale)
1.91 + {
1.92 + while (--count >= 0)
1.93 + {
1.94 + fx = *srcXY++;
1.95 + fy = *srcXY++;
1.96 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.97 + unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.98 + *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
1.99 + }
1.100 + }
1.101 + else
1.102 + {
1.103 + while (--count >= 0)
1.104 + {
1.105 + fx = *srcXY++;
1.106 + fy = *srcXY++;
1.107 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.108 + unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.109 + uint32_t c = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
1.110 + *dstC++ = SkAlphaMulQ(c, scale);
1.111 + }
1.112 + }
1.113 + }
1.114 + return;
1.115 + }
1.116 +
1.117 + // now init fx, fy, dx, dy
1.118 + {
1.119 + SkPoint srcPt;
1.120 + invProc(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.121 + SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
1.122 +
1.123 + fx = SkScalarToFixed(srcPt.fX);
1.124 + fy = SkScalarToFixed(srcPt.fY);
1.125 +
1.126 + if (this->getInverseClass() == kFixedStepInX_MatrixClass)
1.127 + (void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
1.128 + else
1.129 + {
1.130 + dx = SkScalarToFixed(inv.getScaleX());
1.131 + dy = SkScalarToFixed(inv.getSkewY());
1.132 + }
1.133 + }
1.134 +
1.135 +#ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.136 + { int level = this->getMipLevel() >> 16;
1.137 + fx >>= level;
1.138 + fy >>= level;
1.139 + dx >>= level;
1.140 + dy >>= level;
1.141 + }
1.142 +#endif
1.143 +
1.144 + if (dy == 0)
1.145 + {
1.146 + int y_index = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.147 +// SkDEBUGF(("fy = %g, srcMaxY = %d, y_index = %d\n", SkFixedToFloat(fy), srcMaxY, y_index));
1.148 + srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)((const char*)srcPixels + y_index * srcRB);
1.149 + if (scale == 256)
1.150 + while (--count >= 0)
1.151 + {
1.152 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.153 + fx += dx;
1.154 + *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_X(srcPixels, x);
1.155 + }
1.156 + else
1.157 + while (--count >= 0)
1.158 + {
1.159 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.160 + SkPMColor c = NOFILTER_BITMAP_SHADER_SAMPLE_X(srcPixels, x);
1.161 + fx += dx;
1.162 + *dstC++ = SkAlphaMulQ(c, scale);
1.163 + }
1.164 + }
1.165 + else // dy != 0
1.166 + {
1.167 + if (scale == 256)
1.168 + while (--count >= 0)
1.169 + {
1.170 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.171 + unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.172 + fx += dx;
1.173 + fy += dy;
1.174 + *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
1.175 + }
1.176 + else
1.177 + while (--count >= 0)
1.178 + {
1.179 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.180 + unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.181 + SkPMColor c = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
1.182 + fx += dx;
1.183 + fy += dy;
1.184 + *dstC++ = SkAlphaMulQ(c, scale);
1.185 + }
1.186 + }
1.187 +
1.188 + NOFILTER_BITMAP_SHADER_POSTAMBLE(srcBitmap);
1.189 + }
1.190 +
1.191 + virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count)
1.192 + {
1.193 + SkASSERT(count > 0);
1.194 + SkASSERT(this->getFlags() & SkShader::kHasSpan16_Flag);
1.195 +
1.196 +#ifdef NOFILTER_BITMAP_SHADER_SPRITEPROC16
1.197 + if ((this->getTotalInverse().getType() & ~SkMatrix::kTranslate_Mask) == 0)
1.198 + {
1.199 + NOFILTER_BITMAP_SHADER_SPRITEPROC16(this, x, y, dstC, count);
1.200 + return;
1.201 + }
1.202 +#endif
1.203 +
1.204 +#ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.205 + const SkMatrix& inv = this->getUnitInverse();
1.206 + SkMatrix::MapPtProc invProc = this->getUnitInverseProc();
1.207 +#else
1.208 + const SkMatrix& inv = this->getTotalInverse();
1.209 + SkMatrix::MapPtProc invProc = this->getInverseMapPtProc();
1.210 +#endif
1.211 + const SkBitmap& srcBitmap = this->getSrcBitmap();
1.212 + unsigned srcMaxX = srcBitmap.width() - 1;
1.213 + unsigned srcMaxY = srcBitmap.height() - 1;
1.214 + unsigned srcRB = srcBitmap.rowBytes();
1.215 + SkFixed fx, fy, dx, dy;
1.216 +
1.217 + const NOFILTER_BITMAP_SHADER_TYPE* srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)srcBitmap.getPixels();
1.218 + NOFILTER_BITMAP_SHADER_PREAMBLE16(srcBitmap, srcRB);
1.219 +
1.220 + if (this->getInverseClass() == kPerspective_MatrixClass)
1.221 + {
1.222 + SkPerspIter iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.223 + SkIntToScalar(y) + SK_ScalarHalf, count);
1.224 + while ((count = iter.next()) != 0)
1.225 + {
1.226 + const SkFixed* srcXY = iter.getXY();
1.227 +
1.228 + while (--count >= 0)
1.229 + {
1.230 + fx = *srcXY++;
1.231 + fy = *srcXY++;
1.232 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.233 + unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.234 + *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY16(srcPixels, x, y, srcRB);
1.235 + }
1.236 + }
1.237 + return;
1.238 + }
1.239 +
1.240 + // now init fx, fy, dx, dy
1.241 + {
1.242 + SkPoint srcPt;
1.243 + invProc(inv, SkIntToScalar(x) + SK_ScalarHalf,
1.244 + SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
1.245 +
1.246 + fx = SkScalarToFixed(srcPt.fX);
1.247 + fy = SkScalarToFixed(srcPt.fY);
1.248 +
1.249 + if (this->getInverseClass() == kFixedStepInX_MatrixClass)
1.250 + (void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
1.251 + else
1.252 + {
1.253 + dx = SkScalarToFixed(inv.getScaleX());
1.254 + dy = SkScalarToFixed(inv.getSkewY());
1.255 + }
1.256 + }
1.257 +
1.258 +#ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.259 + { int level = this->getMipLevel() >> 16;
1.260 + fx >>= level;
1.261 + fy >>= level;
1.262 + dx >>= level;
1.263 + dy >>= level;
1.264 + }
1.265 +#endif
1.266 +
1.267 + if (dy == 0)
1.268 + {
1.269 + srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)((const char*)srcPixels + NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY) * srcRB);
1.270 + do {
1.271 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.272 + fx += dx;
1.273 + *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_X16(srcPixels, x);
1.274 + } while (--count != 0);
1.275 + }
1.276 + else // dy != 0
1.277 + {
1.278 + do {
1.279 + unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
1.280 + unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
1.281 + fx += dx;
1.282 + fy += dy;
1.283 + *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY16(srcPixels, x, y, srcRB);
1.284 + } while (--count != 0);
1.285 + }
1.286 +
1.287 + NOFILTER_BITMAP_SHADER_POSTAMBLE16(srcBitmap);
1.288 + }
1.289 +private:
1.290 + typedef HasSpan16_Sampler_BitmapShader INHERITED;
1.291 +};
1.292 +
1.293 +#undef NOFILTER_BITMAP_SHADER_CLASS
1.294 +#undef NOFILTER_BITMAP_SHADER_TYPE
1.295 +#undef NOFILTER_BITMAP_SHADER_PREAMBLE
1.296 +#undef NOFILTER_BITMAP_SHADER_POSTAMBLE
1.297 +#undef NOFILTER_BITMAP_SHADER_SAMPLE_X //(x)
1.298 +#undef NOFILTER_BITMAP_SHADER_SAMPLE_XY //(x, y, rowBytes)
1.299 +#undef NOFILTER_BITMAP_SHADER_TILEMODE
1.300 +#undef NOFILTER_BITMAP_SHADER_TILEPROC
1.301 +
1.302 +#undef NOFILTER_BITMAP_SHADER_PREAMBLE16
1.303 +#undef NOFILTER_BITMAP_SHADER_POSTAMBLE16
1.304 +#undef NOFILTER_BITMAP_SHADER_SAMPLE_X16 //(x)
1.305 +#undef NOFILTER_BITMAP_SHADER_SAMPLE_XY16 //(x, y, rowBytes)
1.306 +
1.307 +#undef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
1.308 +#undef NOFILTER_BITMAP_SHADER_SPRITEPROC16
1.309 +#undef NOFILTER_BITMAP_SHADER_SPRITEPROC32
