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