/* libs/graphics/sgl/SkBitmapShader16BilerpTemplate.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.
*/
#include "SkFilterProc.h"
class BILERP_BITMAP16_SHADER_CLASS : public HasSpan16_Sampler_BitmapShader {
public:
BILERP_BITMAP16_SHADER_CLASS(const SkBitmap& src)
: HasSpan16_Sampler_BitmapShader(src, true,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode)
{
}
virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count)
{
SkASSERT(count > 0);
U8CPU alpha = this->getPaintAlpha();
const SkMatrix& inv = this->getTotalInverse();
const SkBitmap& srcBitmap = this->getSrcBitmap();
unsigned srcMaxX = srcBitmap.width() - 1;
unsigned srcMaxY = srcBitmap.height() - 1;
unsigned srcRB = srcBitmap.rowBytes();
BILERP_BITMAP16_SHADER_PREAMBLE(srcBitmap);
const SkFilterProc* proc_table = SkGetBilinearFilterProcTable();
const BILERP_BITMAP16_SHADER_TYPE* srcPixels = (const BILERP_BITMAP16_SHADER_TYPE*)srcBitmap.getPixels();
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)
{
SkFixed fx = *srcXY++ - SK_FixedHalf;
SkFixed fy = *srcXY++ - SK_FixedHalf;
int ix = fx >> 16;
int iy = fy >> 16;
int x = SkClampMax(ix, srcMaxX);
int y = SkClampMax(iy, srcMaxY);
const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels + y * srcRB)) + x;
if ((unsigned)ix < srcMaxX)
p01 += 1;
p10 = p00;
p11 = p01;
if ((unsigned)iy < srcMaxY)
{
p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
}
SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
*dstC++ = expanded_rgb16_to_8888(c, alpha);
}
}
}
else // linear case
{
SkFixed fx, fy, dx, dy;
// now init fx, fy, dx, dy
{
SkPoint srcPt;
this->getInverseMapPtProc()(inv, SkIntToScalar(x) + SK_ScalarHalf,
SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
fx = SkScalarToFixed(srcPt.fX) - SK_FixedHalf;
fy = SkScalarToFixed(srcPt.fY) - SK_FixedHalf;
if (this->getInverseClass() == kFixedStepInX_MatrixClass)
(void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
else
{
dx = SkScalarToFixed(inv.getScaleX());
dy = SkScalarToFixed(inv.getSkewY());
}
}
do {
int ix = fx >> 16;
int iy = fy >> 16;
const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels +
SkClampMax(iy, srcMaxY) * srcRB)) +
SkClampMax(ix, srcMaxX);
if ((unsigned)ix < srcMaxX)
p01 += 1;
p10 = p00;
p11 = p01;
if ((unsigned)iy < srcMaxY)
{
p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
}
SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
*dstC++ = expanded_rgb16_to_8888(c, alpha);
fx += dx;
fy += dy;
} while (--count != 0);
}
BILERP_BITMAP16_SHADER_POSTAMBLE(srcBitmap);
}
virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count)
{
SkASSERT(count > 0);
const SkMatrix& inv = this->getTotalInverse();
const SkBitmap& srcBitmap = this->getSrcBitmap();
unsigned srcMaxX = srcBitmap.width() - 1;
unsigned srcMaxY = srcBitmap.height() - 1;
unsigned srcRB = srcBitmap.rowBytes();
BILERP_BITMAP16_SHADER_PREAMBLE(srcBitmap);
const SkFilterProc* proc_table = SkGetBilinearFilterProcTable();
const BILERP_BITMAP16_SHADER_TYPE* srcPixels = (const BILERP_BITMAP16_SHADER_TYPE*)srcBitmap.getPixels();
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)
{
SkFixed fx = *srcXY++ - SK_FixedHalf;
SkFixed fy = *srcXY++ - SK_FixedHalf;
int ix = fx >> 16;
int iy = fy >> 16;
const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels +
SkClampMax(iy, srcMaxY) * srcRB)) +
SkClampMax(ix, srcMaxX);
if ((unsigned)ix < srcMaxX)
p01 += 1;
p10 = p00;
p11 = p01;
if ((unsigned)iy < srcMaxY)
{
p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
}
SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
*dstC++ = SkCompact_rgb_16(c);
}
}
}
else // linear case
{
SkFixed fx, fy, dx, dy;
// now init fx, fy, dx, dy
{
SkPoint srcPt;
this->getInverseMapPtProc()(inv, SkIntToScalar(x) + SK_ScalarHalf,
SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
fx = SkScalarToFixed(srcPt.fX) - SK_FixedHalf;
fy = SkScalarToFixed(srcPt.fY) - SK_FixedHalf;
if (this->getInverseClass() == kFixedStepInX_MatrixClass)
(void)inv.fixedStepInX(SkIntToScalar(y), &dx, &dy);
else
{
dx = SkScalarToFixed(inv.getScaleX());
dy = SkScalarToFixed(inv.getSkewY());
}
}
do {
int ix = fx >> 16;
int iy = fy >> 16;
const BILERP_BITMAP16_SHADER_TYPE *p00, *p01, *p10, *p11;
p00 = p01 = ((const BILERP_BITMAP16_SHADER_TYPE*)((const char*)srcPixels +
SkClampMax(iy, srcMaxY) * srcRB)) +
SkClampMax(ix, srcMaxX);
if ((unsigned)ix < srcMaxX)
p01 += 1;
p10 = p00;
p11 = p01;
if ((unsigned)iy < srcMaxY)
{
p10 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p10 + srcRB);
p11 = (const BILERP_BITMAP16_SHADER_TYPE*)((const char*)p11 + srcRB);
}
SkFilterProc proc = SkGetBilinearFilterProc(proc_table, fx, fy);
uint32_t c = proc(SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p00)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p01)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p10)),
SkExpand_rgb_16(BILERP_BITMAP16_SHADER_PIXEL(*p11)));
*dstC++ = SkCompact_rgb_16(c);
fx += dx;
fy += dy;
} while (--count != 0);
}
BILERP_BITMAP16_SHADER_POSTAMBLE(srcBitmap);
}
};
#undef BILERP_BITMAP16_SHADER_CLASS
#undef BILERP_BITMAP16_SHADER_TYPE
#undef BILERP_BITMAP16_SHADER_PREAMBLE
#undef BILERP_BITMAP16_SHADER_PIXEL
#undef BILERP_BITMAP16_SHADER_POSTAMBLE