michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: 
michael@0: #ifndef NOFILTER_BITMAP_SHADER_PREAMBLE
michael@0:     #define NOFILTER_BITMAP_SHADER_PREAMBLE(bitmap, rb)
michael@0: #endif
michael@0: #ifndef NOFILTER_BITMAP_SHADER_POSTAMBLE
michael@0:     #define NOFILTER_BITMAP_SHADER_POSTAMBLE(bitmap)
michael@0: #endif
michael@0: #ifndef NOFILTER_BITMAP_SHADER_PREAMBLE16
michael@0:     #define NOFILTER_BITMAP_SHADER_PREAMBLE16(bitmap, rb)
michael@0: #endif
michael@0: #ifndef NOFILTER_BITMAP_SHADER_POSTAMBLE16
michael@0:     #define NOFILTER_BITMAP_SHADER_POSTAMBLE16(bitmap)
michael@0: #endif
michael@0: 
michael@0: class NOFILTER_BITMAP_SHADER_CLASS : public HasSpan16_Sampler_BitmapShader {
michael@0: public:
michael@0:     NOFILTER_BITMAP_SHADER_CLASS(const SkBitmap& src)
michael@0:         : HasSpan16_Sampler_BitmapShader(src, false,
michael@0:                                          NOFILTER_BITMAP_SHADER_TILEMODE,
michael@0:                                          NOFILTER_BITMAP_SHADER_TILEMODE)
michael@0:     {
michael@0:     }
michael@0: 
michael@0:     virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix)
michael@0:     {
michael@0:         if (!this->INHERITED::setContext(device, paint, matrix))
michael@0:             return false;
michael@0: 
michael@0: #ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0:         this->computeUnitInverse();
michael@0: #endif
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count)
michael@0:     {
michael@0:         SkASSERT(count > 0);
michael@0: 
michael@0: #ifdef NOFILTER_BITMAP_SHADER_SPRITEPROC32
michael@0:         if ((this->getTotalInverse().getType() & ~SkMatrix::kTranslate_Mask) == 0)
michael@0:         {
michael@0:             NOFILTER_BITMAP_SHADER_SPRITEPROC32(this, x, y, dstC, count);
michael@0:             return;
michael@0:         }
michael@0: #endif
michael@0: 
michael@0:         unsigned        scale = SkAlpha255To256(this->getPaintAlpha());
michael@0: #ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0:         const SkMatrix& inv = this->getUnitInverse();
michael@0:         SkMatrix::MapPtProc invProc = this->getUnitInverseProc();
michael@0: #else
michael@0:         const SkMatrix& inv = this->getTotalInverse();
michael@0:         SkMatrix::MapPtProc invProc = this->getInverseMapPtProc();
michael@0: #endif
michael@0:         const SkBitmap& srcBitmap = this->getSrcBitmap();
michael@0:         unsigned        srcMaxX = srcBitmap.width() - 1;
michael@0:         unsigned        srcMaxY = srcBitmap.height() - 1;
michael@0:         unsigned        srcRB = srcBitmap.rowBytes();
michael@0:         SkFixed         fx, fy, dx, dy;
michael@0: 
michael@0:         const NOFILTER_BITMAP_SHADER_TYPE* srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)srcBitmap.getPixels();
michael@0:         NOFILTER_BITMAP_SHADER_PREAMBLE(srcBitmap, srcRB);
michael@0: 
michael@0:         if (this->getInverseClass() == kPerspective_MatrixClass)
michael@0:         {
michael@0:             SkPerspIter   iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
michael@0:                                     SkIntToScalar(y) + SK_ScalarHalf, count);
michael@0:             while ((count = iter.next()) != 0)
michael@0:             {
michael@0:                 const SkFixed* srcXY = iter.getXY();
michael@0: 
michael@0: /*  Do I need this?
michael@0: #ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0:             fx >>= level;
michael@0:             fy >>= level;
michael@0: #endif
michael@0: */
michael@0:                 if (256 == scale)
michael@0:                 {
michael@0:                     while (--count >= 0)
michael@0:                     {
michael@0:                         fx = *srcXY++;
michael@0:                         fy = *srcXY++;
michael@0:                         unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                         unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0:                         *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
michael@0:                     }
michael@0:                 }
michael@0:                 else
michael@0:                 {
michael@0:                     while (--count >= 0)
michael@0:                     {
michael@0:                         fx = *srcXY++;
michael@0:                         fy = *srcXY++;
michael@0:                         unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                         unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0:                         uint32_t c = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
michael@0:                         *dstC++ = SkAlphaMulQ(c, scale);
michael@0:                     }
michael@0:                 }
michael@0:             }
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         // now init fx, fy, dx, dy
michael@0:         {
michael@0:             SkPoint srcPt;
michael@0:             invProc(inv, SkIntToScalar(x) + SK_ScalarHalf,
michael@0:                          SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
michael@0: 
michael@0:             fx = SkScalarToFixed(srcPt.fX);
michael@0:             fy = SkScalarToFixed(srcPt.fY);
michael@0: 
michael@0:             if (this->getInverseClass() == kFixedStepInX_MatrixClass)
michael@0:                 (void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
michael@0:             else
michael@0:             {
michael@0:                 dx = SkScalarToFixed(inv.getScaleX());
michael@0:                 dy = SkScalarToFixed(inv.getSkewY());
michael@0:             }
michael@0:         }
michael@0: 
michael@0: #ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0:         {   int level = this->getMipLevel() >> 16;
michael@0:             fx >>= level;
michael@0:             fy >>= level;
michael@0:             dx >>= level;
michael@0:             dy >>= level;
michael@0:         }
michael@0: #endif
michael@0: 
michael@0:         if (dy == 0)
michael@0:         {
michael@0:             int y_index = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0: //          SkDEBUGF(("fy = %g, srcMaxY = %d, y_index = %d\n", SkFixedToFloat(fy), srcMaxY, y_index));
michael@0:             srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)((const char*)srcPixels + y_index * srcRB);
michael@0:             if (scale == 256)
michael@0:                 while (--count >= 0)
michael@0:                 {
michael@0:                     unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                     fx += dx;
michael@0:                     *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_X(srcPixels, x);
michael@0:                 }
michael@0:             else
michael@0:                 while (--count >= 0)
michael@0:                 {
michael@0:                     unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                     SkPMColor c = NOFILTER_BITMAP_SHADER_SAMPLE_X(srcPixels, x);
michael@0:                     fx += dx;
michael@0:                     *dstC++ = SkAlphaMulQ(c, scale);
michael@0:                 }
michael@0:         }
michael@0:         else    // dy != 0
michael@0:         {
michael@0:             if (scale == 256)
michael@0:                 while (--count >= 0)
michael@0:                 {
michael@0:                     unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                     unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0:                     fx += dx;
michael@0:                     fy += dy;
michael@0:                     *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
michael@0:                 }
michael@0:             else
michael@0:                 while (--count >= 0)
michael@0:                 {
michael@0:                     unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                     unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0:                     SkPMColor c = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
michael@0:                     fx += dx;
michael@0:                     fy += dy;
michael@0:                     *dstC++ = SkAlphaMulQ(c, scale);
michael@0:                 }
michael@0:         }
michael@0: 
michael@0:         NOFILTER_BITMAP_SHADER_POSTAMBLE(srcBitmap);
michael@0:     }
michael@0: 
michael@0:     virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count)
michael@0:     {
michael@0:         SkASSERT(count > 0);
michael@0:         SkASSERT(this->getFlags() & SkShader::kHasSpan16_Flag);
michael@0: 
michael@0: #ifdef NOFILTER_BITMAP_SHADER_SPRITEPROC16
michael@0:         if ((this->getTotalInverse().getType() & ~SkMatrix::kTranslate_Mask) == 0)
michael@0:         {
michael@0:             NOFILTER_BITMAP_SHADER_SPRITEPROC16(this, x, y, dstC, count);
michael@0:             return;
michael@0:         }
michael@0: #endif
michael@0: 
michael@0: #ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0:         const SkMatrix& inv = this->getUnitInverse();
michael@0:         SkMatrix::MapPtProc invProc = this->getUnitInverseProc();
michael@0: #else
michael@0:         const SkMatrix& inv = this->getTotalInverse();
michael@0:         SkMatrix::MapPtProc invProc = this->getInverseMapPtProc();
michael@0: #endif
michael@0:         const SkBitmap& srcBitmap = this->getSrcBitmap();
michael@0:         unsigned        srcMaxX = srcBitmap.width() - 1;
michael@0:         unsigned        srcMaxY = srcBitmap.height() - 1;
michael@0:         unsigned        srcRB = srcBitmap.rowBytes();
michael@0:         SkFixed         fx, fy, dx, dy;
michael@0: 
michael@0:         const NOFILTER_BITMAP_SHADER_TYPE* srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)srcBitmap.getPixels();
michael@0:         NOFILTER_BITMAP_SHADER_PREAMBLE16(srcBitmap, srcRB);
michael@0: 
michael@0:         if (this->getInverseClass() == kPerspective_MatrixClass)
michael@0:         {
michael@0:             SkPerspIter   iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
michael@0:                                     SkIntToScalar(y) + SK_ScalarHalf, count);
michael@0:             while ((count = iter.next()) != 0)
michael@0:             {
michael@0:                 const SkFixed* srcXY = iter.getXY();
michael@0: 
michael@0:                 while (--count >= 0)
michael@0:                 {
michael@0:                     fx = *srcXY++;
michael@0:                     fy = *srcXY++;
michael@0:                     unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                     unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0:                     *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY16(srcPixels, x, y, srcRB);
michael@0:                 }
michael@0:             }
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         // now init fx, fy, dx, dy
michael@0:         {
michael@0:             SkPoint srcPt;
michael@0:             invProc(inv, SkIntToScalar(x) + SK_ScalarHalf,
michael@0:                          SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
michael@0: 
michael@0:             fx = SkScalarToFixed(srcPt.fX);
michael@0:             fy = SkScalarToFixed(srcPt.fY);
michael@0: 
michael@0:             if (this->getInverseClass() == kFixedStepInX_MatrixClass)
michael@0:                 (void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
michael@0:             else
michael@0:             {
michael@0:                 dx = SkScalarToFixed(inv.getScaleX());
michael@0:                 dy = SkScalarToFixed(inv.getSkewY());
michael@0:             }
michael@0:         }
michael@0: 
michael@0: #ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0:         {   int level = this->getMipLevel() >> 16;
michael@0:             fx >>= level;
michael@0:             fy >>= level;
michael@0:             dx >>= level;
michael@0:             dy >>= level;
michael@0:         }
michael@0: #endif
michael@0: 
michael@0:         if (dy == 0)
michael@0:         {
michael@0:             srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)((const char*)srcPixels + NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY) * srcRB);
michael@0:             do {
michael@0:                 unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                 fx += dx;
michael@0:                 *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_X16(srcPixels, x);
michael@0:             } while (--count != 0);
michael@0:         }
michael@0:         else    // dy != 0
michael@0:         {
michael@0:             do {
michael@0:                 unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
michael@0:                 unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
michael@0:                 fx += dx;
michael@0:                 fy += dy;
michael@0:                 *dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY16(srcPixels, x, y, srcRB);
michael@0:             } while (--count != 0);
michael@0:         }
michael@0: 
michael@0:         NOFILTER_BITMAP_SHADER_POSTAMBLE16(srcBitmap);
michael@0:     }
michael@0: private:
michael@0:     typedef HasSpan16_Sampler_BitmapShader INHERITED;
michael@0: };
michael@0: 
michael@0: #undef NOFILTER_BITMAP_SHADER_CLASS
michael@0: #undef NOFILTER_BITMAP_SHADER_TYPE
michael@0: #undef NOFILTER_BITMAP_SHADER_PREAMBLE
michael@0: #undef NOFILTER_BITMAP_SHADER_POSTAMBLE
michael@0: #undef NOFILTER_BITMAP_SHADER_SAMPLE_X      //(x)
michael@0: #undef NOFILTER_BITMAP_SHADER_SAMPLE_XY     //(x, y, rowBytes)
michael@0: #undef NOFILTER_BITMAP_SHADER_TILEMODE
michael@0: #undef NOFILTER_BITMAP_SHADER_TILEPROC
michael@0: 
michael@0: #undef NOFILTER_BITMAP_SHADER_PREAMBLE16
michael@0: #undef NOFILTER_BITMAP_SHADER_POSTAMBLE16
michael@0: #undef NOFILTER_BITMAP_SHADER_SAMPLE_X16        //(x)
michael@0: #undef NOFILTER_BITMAP_SHADER_SAMPLE_XY16       //(x, y, rowBytes)
michael@0: 
michael@0: #undef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
michael@0: #undef NOFILTER_BITMAP_SHADER_SPRITEPROC16
michael@0: #undef NOFILTER_BITMAP_SHADER_SPRITEPROC32