1651 FG_PIXEL, PREFIX, SRC_PREFIX) \
1652 do { \
1653 DeclareCompVarsFor3ByteRgb(dst) \
1654 jint mixValSrc = GLYPH_PIXELS[PIXEL_INDEX]; \
1655 if (mixValSrc) { \
1656 if (mixValSrc < 255) { \
1657 jint mixValDst = 255 - mixValSrc; \
1658 Load ## DST ## To3ByteRgb(DST_PTR, pix, PIXEL_INDEX, \
1659 dstR, dstG, dstB); \
1660 MultMultAddAndStore3ByteRgbComps(dst, mixValDst, dst, \
1661 mixValSrc, SRC_PREFIX); \
1662 Store ## DST ## From3ByteRgb(DST_PTR, pix, PIXEL_INDEX, \
1663 dstR, dstG, dstB); \
1664 } else { \
1665 Store ## DST ## PixelData(DST_PTR, PIXEL_INDEX, \
1666 FG_PIXEL, PREFIX); \
1667 } \
1668 } \
1669 } while (0);
1670
1671 #define GlyphListAABlend4ByteArgb(DST, GLYPH_PIXELS, PIXEL_INDEX, DST_PTR, \
1672 FG_PIXEL, PREFIX, SRC_PREFIX) \
1673 do { \
1674 DeclareAlphaVarFor4ByteArgb(dstA) \
1675 DeclareCompVarsFor4ByteArgb(dst) \
1676 jint mixValSrc = GLYPH_PIXELS[PIXEL_INDEX]; \
1677 if (mixValSrc) { \
1678 if (mixValSrc < 255) { \
1679 jint mixValDst = 255 - mixValSrc; \
1680 Load ## DST ## To4ByteArgb(DST_PTR, pix, PIXEL_INDEX, \
1681 dstA, dstR, dstG, dstB); \
1682 dstA = MUL8(dstA, mixValDst) + \
1683 MUL8(SRC_PREFIX ## A, mixValSrc); \
1684 MultMultAddAndStore4ByteArgbComps(dst, mixValDst, dst, \
1685 mixValSrc, SRC_PREFIX); \
1686 if (!(DST ## IsOpaque) && \
1687 !(DST ## IsPremultiplied) && dstA && dstA < 255) { \
1688 DivideAndStore4ByteArgbComps(dst, dst, dstA); \
1689 } \
1690 Store ## DST ## From4ByteArgbComps(DST_PTR, pix, \
1691 PIXEL_INDEX, dst); \
1692 } else { \
1693 Store ## DST ## PixelData(DST_PTR, PIXEL_INDEX, \
1694 FG_PIXEL, PREFIX); \
1695 } \
1696 } \
1697 } while (0);
1698
1699 #define GlyphListAABlend1ByteGray(DST, GLYPH_PIXELS, PIXEL_INDEX, DST_PTR, \
1700 FG_PIXEL, PREFIX, SRC_PREFIX) \
1701 do { \
1702 DeclareCompVarsFor1ByteGray(dst) \
1703 jint mixValSrc = GLYPH_PIXELS[PIXEL_INDEX]; \
1704 if (mixValSrc) { \
1705 if (mixValSrc < 255) { \
1706 jint mixValDst = 255 - mixValSrc; \
1707 Load ## DST ## To1ByteGray(DST_PTR, pix, PIXEL_INDEX, \
1708 dstG); \
1709 MultMultAddAndStore1ByteGrayComps(dst, mixValDst, dst, \
1710 mixValSrc, SRC_PREFIX); \
1711 Store ## DST ## From1ByteGray(DST_PTR, pix, PIXEL_INDEX, \
1712 dstG); \
1713 } else { \
1714 Store ## DST ## PixelData(DST_PTR, PIXEL_INDEX, \
1715 FG_PIXEL, PREFIX); \
|
1651 FG_PIXEL, PREFIX, SRC_PREFIX) \
1652 do { \
1653 DeclareCompVarsFor3ByteRgb(dst) \
1654 jint mixValSrc = GLYPH_PIXELS[PIXEL_INDEX]; \
1655 if (mixValSrc) { \
1656 if (mixValSrc < 255) { \
1657 jint mixValDst = 255 - mixValSrc; \
1658 Load ## DST ## To3ByteRgb(DST_PTR, pix, PIXEL_INDEX, \
1659 dstR, dstG, dstB); \
1660 MultMultAddAndStore3ByteRgbComps(dst, mixValDst, dst, \
1661 mixValSrc, SRC_PREFIX); \
1662 Store ## DST ## From3ByteRgb(DST_PTR, pix, PIXEL_INDEX, \
1663 dstR, dstG, dstB); \
1664 } else { \
1665 Store ## DST ## PixelData(DST_PTR, PIXEL_INDEX, \
1666 FG_PIXEL, PREFIX); \
1667 } \
1668 } \
1669 } while (0);
1670
1671 /*
1672 * Antialiased glyph drawing results in artifacts around the character edges
1673 * when text is drawn ontop of translucent background color. The standard
1674 * blending equation for two colors:
1675 * destColor = srcColor * glyphAlpha + destColor * (1 - glyphAlpha)
1676 * works only when srcColor and destColor are opaque. For translucent srcColor
1677 * and destColor, the respective alpha components in each color will influence
1678 * the visibility of the color and the visibility of the color below it. Hence
1679 * the equation for blending is given as:
1680 * resA = srcAlpha + dstAlpha * (1 - srcAlpha)
1681 * resCol = (srcColor * srcAlpha + destColor * destAlpha * (1- srcAlpha))/resA
1682 * In addition, srcAlpha is multiplied with the glyphAlpha- that indicates the
1683 * grayscale mask value of the glyph being drawn. The combined result provides
1684 * smooth antialiased text on the buffer without any artifacts. Since the
1685 * logic is executed for every pixel in a glyph, the implementation is further
1686 * optimized to reduce computation and improve execution time.
1687 */
1688 #define GlyphListAABlend4ByteArgb(DST, GLYPH_PIXELS, PIXEL_INDEX, DST_PTR, \
1689 FG_PIXEL, PREFIX, SRC_PREFIX) \
1690 do { \
1691 DeclareAlphaVarFor4ByteArgb(resA) \
1692 DeclareCompVarsFor4ByteArgb(res) \
1693 jint mixValSrc = GLYPH_PIXELS[PIXEL_INDEX]; \
1694 if (mixValSrc) { \
1695 if (mixValSrc != 0xff) { \
1696 PromoteByteAlphaFor4ByteArgb(mixValSrc); \
1697 resA = MultiplyAlphaFor4ByteArgb(mixValSrc, SRC_PREFIX ## A); \
1698 MultiplyAndStore4ByteArgbComps(res, resA, SRC_PREFIX); \
1699 } else { \
1700 resA = SRC_PREFIX ## A; \
1701 MultiplyAndStore4ByteArgbComps(res, \
1702 SRC_PREFIX ## A, \
1703 SRC_PREFIX); \
1704 } \
1705 if (resA != MaxValFor4ByteArgb) { \
1706 DeclareAndInvertAlphaVarFor4ByteArgb(dstF, resA) \
1707 DeclareAndClearAlphaVarFor4ByteArgb(dstA) \
1708 Declare ## DST ## AlphaLoadData(DstPix) \
1709 jint pixelOffset = PIXEL_INDEX * (DST ## PixelStride); \
1710 DST ## DataType *pixelAddress = PtrAddBytes(DST_PTR, \
1711 pixelOffset); \
1712 LoadAlphaFrom ## DST ## For4ByteArgb(pixelAddress, \
1713 DstPix, \
1714 dst); \
1715 dstA = MultiplyAlphaFor4ByteArgb(dstF, dstA); \
1716 if (!(DST ## IsPremultiplied)) { \
1717 dstF = dstA; \
1718 } \
1719 resA += dstA; \
1720 if (dstF) { \
1721 DeclareCompVarsFor4ByteArgb(tmp) \
1722 Postload4ByteArgbFrom ## DST(pixelAddress, \
1723 DstPix, \
1724 tmp); \
1725 if (dstF != MaxValFor4ByteArgb) { \
1726 MultiplyAndStore4ByteArgbComps(tmp, \
1727 dstF, \
1728 tmp); \
1729 } \
1730 Store4ByteArgbCompsUsingOp(res, +=, tmp); \
1731 } \
1732 } \
1733 if (!(DST ## IsOpaque) && \
1734 !(DST ## IsPremultiplied) && resA && \
1735 resA < MaxValFor4ByteArgb) \
1736 { \
1737 DivideAndStore4ByteArgbComps(res, res, resA); \
1738 } \
1739 Store ## DST ## From4ByteArgbComps(DST_PTR, pix, \
1740 PIXEL_INDEX, res); \
1741 } \
1742 } while (0);
1743
1744 #define GlyphListAABlend1ByteGray(DST, GLYPH_PIXELS, PIXEL_INDEX, DST_PTR, \
1745 FG_PIXEL, PREFIX, SRC_PREFIX) \
1746 do { \
1747 DeclareCompVarsFor1ByteGray(dst) \
1748 jint mixValSrc = GLYPH_PIXELS[PIXEL_INDEX]; \
1749 if (mixValSrc) { \
1750 if (mixValSrc < 255) { \
1751 jint mixValDst = 255 - mixValSrc; \
1752 Load ## DST ## To1ByteGray(DST_PTR, pix, PIXEL_INDEX, \
1753 dstG); \
1754 MultMultAddAndStore1ByteGrayComps(dst, mixValDst, dst, \
1755 mixValSrc, SRC_PREFIX); \
1756 Store ## DST ## From1ByteGray(DST_PTR, pix, PIXEL_INDEX, \
1757 dstG); \
1758 } else { \
1759 Store ## DST ## PixelData(DST_PTR, PIXEL_INDEX, \
1760 FG_PIXEL, PREFIX); \
|