mirror of https://github.com/axmolengine/axmol.git
315 lines
12 KiB
C
315 lines
12 KiB
C
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/* libs/graphics/sgl/SkBitmapShaderTemplate.h
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**
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** Copyright 2006, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#ifndef NOFILTER_BITMAP_SHADER_PREAMBLE
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#define NOFILTER_BITMAP_SHADER_PREAMBLE(bitmap, rb)
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#endif
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#ifndef NOFILTER_BITMAP_SHADER_POSTAMBLE
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#define NOFILTER_BITMAP_SHADER_POSTAMBLE(bitmap)
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#endif
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#ifndef NOFILTER_BITMAP_SHADER_PREAMBLE16
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#define NOFILTER_BITMAP_SHADER_PREAMBLE16(bitmap, rb)
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#endif
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#ifndef NOFILTER_BITMAP_SHADER_POSTAMBLE16
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#define NOFILTER_BITMAP_SHADER_POSTAMBLE16(bitmap)
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#endif
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class NOFILTER_BITMAP_SHADER_CLASS : public HasSpan16_Sampler_BitmapShader {
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public:
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NOFILTER_BITMAP_SHADER_CLASS(const SkBitmap& src)
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: HasSpan16_Sampler_BitmapShader(src, false,
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NOFILTER_BITMAP_SHADER_TILEMODE,
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NOFILTER_BITMAP_SHADER_TILEMODE)
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{
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}
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virtual bool setContext(const SkBitmap& device, const SkPaint& paint, const SkMatrix& matrix)
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{
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if (!this->INHERITED::setContext(device, paint, matrix))
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return false;
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#ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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this->computeUnitInverse();
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#endif
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return true;
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}
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virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count)
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{
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SkASSERT(count > 0);
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#ifdef NOFILTER_BITMAP_SHADER_SPRITEPROC32
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if ((this->getTotalInverse().getType() & ~SkMatrix::kTranslate_Mask) == 0)
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{
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NOFILTER_BITMAP_SHADER_SPRITEPROC32(this, x, y, dstC, count);
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return;
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}
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#endif
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unsigned scale = SkAlpha255To256(this->getPaintAlpha());
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#ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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const SkMatrix& inv = this->getUnitInverse();
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SkMatrix::MapPtProc invProc = this->getUnitInverseProc();
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#else
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const SkMatrix& inv = this->getTotalInverse();
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SkMatrix::MapPtProc invProc = this->getInverseMapPtProc();
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#endif
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const SkBitmap& srcBitmap = this->getSrcBitmap();
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unsigned srcMaxX = srcBitmap.width() - 1;
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unsigned srcMaxY = srcBitmap.height() - 1;
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unsigned srcRB = srcBitmap.rowBytes();
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SkFixed fx, fy, dx, dy;
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const NOFILTER_BITMAP_SHADER_TYPE* srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)srcBitmap.getPixels();
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NOFILTER_BITMAP_SHADER_PREAMBLE(srcBitmap, srcRB);
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if (this->getInverseClass() == kPerspective_MatrixClass)
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{
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SkPerspIter iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
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SkIntToScalar(y) + SK_ScalarHalf, count);
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while ((count = iter.next()) != 0)
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{
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const SkFixed* srcXY = iter.getXY();
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/* Do I need this?
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#ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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fx >>= level;
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fy >>= level;
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#endif
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*/
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if (256 == scale)
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{
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while (--count >= 0)
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{
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fx = *srcXY++;
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fy = *srcXY++;
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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*dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
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}
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}
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else
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{
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while (--count >= 0)
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{
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fx = *srcXY++;
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fy = *srcXY++;
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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uint32_t c = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
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*dstC++ = SkAlphaMulQ(c, scale);
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}
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}
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}
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return;
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}
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// now init fx, fy, dx, dy
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{
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SkPoint srcPt;
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invProc(inv, SkIntToScalar(x) + SK_ScalarHalf,
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SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
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fx = SkScalarToFixed(srcPt.fX);
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fy = SkScalarToFixed(srcPt.fY);
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if (this->getInverseClass() == kFixedStepInX_MatrixClass)
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(void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
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else
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{
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dx = SkScalarToFixed(inv.getScaleX());
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dy = SkScalarToFixed(inv.getSkewY());
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}
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}
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#ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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{ int level = this->getMipLevel() >> 16;
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fx >>= level;
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fy >>= level;
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dx >>= level;
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dy >>= level;
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}
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#endif
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if (dy == 0)
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{
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int y_index = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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// SkDEBUGF(("fy = %g, srcMaxY = %d, y_index = %d\n", SkFixedToFloat(fy), srcMaxY, y_index));
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srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)((const char*)srcPixels + y_index * srcRB);
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if (scale == 256)
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while (--count >= 0)
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{
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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fx += dx;
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*dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_X(srcPixels, x);
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}
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else
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while (--count >= 0)
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{
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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SkPMColor c = NOFILTER_BITMAP_SHADER_SAMPLE_X(srcPixels, x);
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fx += dx;
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*dstC++ = SkAlphaMulQ(c, scale);
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}
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}
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else // dy != 0
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{
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if (scale == 256)
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while (--count >= 0)
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{
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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fx += dx;
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fy += dy;
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*dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
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}
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else
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while (--count >= 0)
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{
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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SkPMColor c = NOFILTER_BITMAP_SHADER_SAMPLE_XY(srcPixels, x, y, srcRB);
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fx += dx;
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fy += dy;
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*dstC++ = SkAlphaMulQ(c, scale);
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}
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}
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NOFILTER_BITMAP_SHADER_POSTAMBLE(srcBitmap);
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}
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virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count)
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{
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SkASSERT(count > 0);
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SkASSERT(this->getFlags() & SkShader::kHasSpan16_Flag);
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#ifdef NOFILTER_BITMAP_SHADER_SPRITEPROC16
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if ((this->getTotalInverse().getType() & ~SkMatrix::kTranslate_Mask) == 0)
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{
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NOFILTER_BITMAP_SHADER_SPRITEPROC16(this, x, y, dstC, count);
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return;
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}
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#endif
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#ifdef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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const SkMatrix& inv = this->getUnitInverse();
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SkMatrix::MapPtProc invProc = this->getUnitInverseProc();
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#else
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const SkMatrix& inv = this->getTotalInverse();
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SkMatrix::MapPtProc invProc = this->getInverseMapPtProc();
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#endif
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const SkBitmap& srcBitmap = this->getSrcBitmap();
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unsigned srcMaxX = srcBitmap.width() - 1;
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unsigned srcMaxY = srcBitmap.height() - 1;
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unsigned srcRB = srcBitmap.rowBytes();
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SkFixed fx, fy, dx, dy;
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const NOFILTER_BITMAP_SHADER_TYPE* srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)srcBitmap.getPixels();
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NOFILTER_BITMAP_SHADER_PREAMBLE16(srcBitmap, srcRB);
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if (this->getInverseClass() == kPerspective_MatrixClass)
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{
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SkPerspIter iter(inv, SkIntToScalar(x) + SK_ScalarHalf,
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SkIntToScalar(y) + SK_ScalarHalf, count);
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while ((count = iter.next()) != 0)
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{
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const SkFixed* srcXY = iter.getXY();
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while (--count >= 0)
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{
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fx = *srcXY++;
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fy = *srcXY++;
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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*dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY16(srcPixels, x, y, srcRB);
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}
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}
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return;
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}
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// now init fx, fy, dx, dy
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{
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SkPoint srcPt;
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invProc(inv, SkIntToScalar(x) + SK_ScalarHalf,
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SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
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fx = SkScalarToFixed(srcPt.fX);
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fy = SkScalarToFixed(srcPt.fY);
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if (this->getInverseClass() == kFixedStepInX_MatrixClass)
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(void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
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else
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{
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dx = SkScalarToFixed(inv.getScaleX());
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dy = SkScalarToFixed(inv.getSkewY());
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}
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}
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#ifndef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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{ int level = this->getMipLevel() >> 16;
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fx >>= level;
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fy >>= level;
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dx >>= level;
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dy >>= level;
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}
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#endif
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if (dy == 0)
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{
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srcPixels = (const NOFILTER_BITMAP_SHADER_TYPE*)((const char*)srcPixels + NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY) * srcRB);
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do {
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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fx += dx;
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*dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_X16(srcPixels, x);
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} while (--count != 0);
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}
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else // dy != 0
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{
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do {
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unsigned x = NOFILTER_BITMAP_SHADER_TILEPROC(fx, srcMaxX);
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unsigned y = NOFILTER_BITMAP_SHADER_TILEPROC(fy, srcMaxY);
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fx += dx;
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fy += dy;
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*dstC++ = NOFILTER_BITMAP_SHADER_SAMPLE_XY16(srcPixels, x, y, srcRB);
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} while (--count != 0);
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}
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NOFILTER_BITMAP_SHADER_POSTAMBLE16(srcBitmap);
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}
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private:
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typedef HasSpan16_Sampler_BitmapShader INHERITED;
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};
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#undef NOFILTER_BITMAP_SHADER_CLASS
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#undef NOFILTER_BITMAP_SHADER_TYPE
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#undef NOFILTER_BITMAP_SHADER_PREAMBLE
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#undef NOFILTER_BITMAP_SHADER_POSTAMBLE
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#undef NOFILTER_BITMAP_SHADER_SAMPLE_X //(x)
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#undef NOFILTER_BITMAP_SHADER_SAMPLE_XY //(x, y, rowBytes)
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#undef NOFILTER_BITMAP_SHADER_TILEMODE
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#undef NOFILTER_BITMAP_SHADER_TILEPROC
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#undef NOFILTER_BITMAP_SHADER_PREAMBLE16
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#undef NOFILTER_BITMAP_SHADER_POSTAMBLE16
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#undef NOFILTER_BITMAP_SHADER_SAMPLE_X16 //(x)
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#undef NOFILTER_BITMAP_SHADER_SAMPLE_XY16 //(x, y, rowBytes)
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#undef NOFILTER_BITMAP_SHADER_USE_UNITINVERSE
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#undef NOFILTER_BITMAP_SHADER_SPRITEPROC16
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#undef NOFILTER_BITMAP_SHADER_SPRITEPROC32
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