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Commit 52a01449 authored by Jason Sams's avatar Jason Sams Committed by Android (Google) Code Review
Browse files

Merge "Fix RS mipmap generation for 8 bit alpha textures."

parents 2d51bff2 e20e3b41

libs/rs/rsAllocation.cpp

+22 −0
Original line number Diff line number Diff line
@@ -366,6 +366,25 @@ static void mip8888(const Adapter2D &out, const Adapter2D &in) 
    }

}



static void mip8(const Adapter2D &out, const Adapter2D &in)

{

    uint32_t w = out.getDimX();

    uint32_t h = out.getDimY();



    for (uint32_t y=0; y < h; y++) {

        uint8_t *oPtr = static_cast<uint8_t *>(out.getElement(0, y));

        const uint8_t *i1 = static_cast<uint8_t *>(in.getElement(0, y*2));

        const uint8_t *i2 = static_cast<uint8_t *>(in.getElement(0, y*2+1));



        for (uint32_t x=0; x < w; x++) {

            *oPtr = (uint8_t)(((uint32_t)i1[0] + i1[1] + i2[0] + i2[1]) * 0.25f);

            oPtr ++;

            i1 += 2;

            i2 += 2;

        }

    }

}



static void mip(const Adapter2D &out, const Adapter2D &in)

{

    switch(out.getBaseType()->getElement()->getSizeBits()) {
@@ -375,6 +394,9 @@ static void mip(const Adapter2D &out, const Adapter2D &in) 
    case 16:

        mip565(out, in);

        break;

    case 8:

        mip8(out, in);

        break;



    }