src/core/SkBitmapSamplerTemplate.h

/* libs/graphics/sgl/SkBitmapSamplerTemplate.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.
*/

/*  this guy is pulled in multiple times, with the following symbols defined each time:

    #define BITMAP_CLASSNAME_PREFIX(name)           ARGB32##name
    #defube BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y)   *bitmap.getAddr32(x, y)
*/

class BITMAP_CLASSNAME_PREFIX(_Point_Sampler) : public SkBitmapSampler {
public:
    BITMAP_CLASSNAME_PREFIX(_Point_Sampler)(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
        : SkBitmapSampler(bm, false, tmx, tmy)
    {
    }

    virtual SkPMColor sample(SkFixed x, SkFixed y) const
    {
        x = fTileProcX(SkFixedFloor(x), fMaxX);
        y = fTileProcY(SkFixedFloor(y), fMaxY);
        return BITMAP_PIXEL_TO_PMCOLOR(fBitmap, x, y);
    }
};


class BITMAP_CLASSNAME_PREFIX(_Point_Clamp_Sampler) : public SkBitmapSampler {
public:
    BITMAP_CLASSNAME_PREFIX(_Point_Clamp_Sampler)(const SkBitmap& bm)
        : SkBitmapSampler(bm, false, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode)
    {
    }

    virtual SkPMColor sample(SkFixed x, SkFixed y) const
    {
        x = do_clamp(SkFixedFloor(x), fMaxX);
        y = do_clamp(SkFixedFloor(y), fMaxY);
        return BITMAP_PIXEL_TO_PMCOLOR(fBitmap, x, y);
    }
};

class BITMAP_CLASSNAME_PREFIX(_Point_Repeat_Pow2_Sampler) : public SkBitmapSampler {
public:
    BITMAP_CLASSNAME_PREFIX(_Point_Repeat_Pow2_Sampler)(const SkBitmap& bm)
        : SkBitmapSampler(bm, false, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode)
    {
    }

    virtual SkPMColor sample(SkFixed x, SkFixed y) const
    {
        x = do_repeat_pow2(SkFixedFloor(x), fMaxX);
        y = do_repeat_pow2(SkFixedFloor(y), fMaxY);
        return BITMAP_PIXEL_TO_PMCOLOR(fBitmap, x, y);
    }
};

class BITMAP_CLASSNAME_PREFIX(_Point_Repeat_Mod_Sampler) : public SkBitmapSampler {
public:
    BITMAP_CLASSNAME_PREFIX(_Point_Repeat_Mod_Sampler)(const SkBitmap& bm)
        : SkBitmapSampler(bm, false, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode)
    {
    }

    virtual SkPMColor sample(SkFixed x, SkFixed y) const
    {
        x = do_repeat_mod(SkFixedFloor(x), fMaxX);
        y = do_repeat_mod(SkFixedFloor(y), fMaxY);
        return BITMAP_PIXEL_TO_PMCOLOR(fBitmap, x, y);
    }
};

class BITMAP_CLASSNAME_PREFIX(_Point_Mirror_Pow2_Sampler) : public SkBitmapSampler {
public:
    BITMAP_CLASSNAME_PREFIX(_Point_Mirror_Pow2_Sampler)(const SkBitmap& bm)
        : SkBitmapSampler(bm, false, SkShader::kMirror_TileMode, SkShader::kMirror_TileMode)
    {
    }

    virtual SkPMColor sample(SkFixed x, SkFixed y) const
    {
        x = do_mirror_pow2(SkFixedFloor(x), fMaxX);
        y = do_mirror_pow2(SkFixedFloor(y), fMaxY);
        return BITMAP_PIXEL_TO_PMCOLOR(fBitmap, x, y);
    }
};

class BITMAP_CLASSNAME_PREFIX(_Point_Mirror_Mod_Sampler) : public SkBitmapSampler {
public:
    BITMAP_CLASSNAME_PREFIX(_Point_Mirror_Mod_Sampler)(const SkBitmap& bm)
        : SkBitmapSampler(bm, false, SkShader::kMirror_TileMode, SkShader::kMirror_TileMode)
    {
    }

    virtual SkPMColor sample(SkFixed x, SkFixed y) const
    {
        x = do_mirror_mod(SkFixedFloor(x), fMaxX);
        y = do_mirror_mod(SkFixedFloor(y), fMaxY);
        return BITMAP_PIXEL_TO_PMCOLOR(fBitmap, x, y);
    }
};

#undef BITMAP_CLASSNAME_PREFIX
#undef BITMAP_PIXEL_TO_PMCOLOR