/* * Copyright 2006 The Android Open Source Project * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "include/core/SkColor.h" #include "include/private/SkColorData.h" #include "include/private/SkFixed.h" SkPMColor SkPreMultiplyARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { return SkPremultiplyARGBInline(a, r, g, b); } SkPMColor SkPreMultiplyColor(SkColor c) { return SkPremultiplyARGBInline(SkColorGetA(c), SkColorGetR(c), SkColorGetG(c), SkColorGetB(c)); } /////////////////////////////////////////////////////////////////////////////// static inline SkScalar ByteToScalar(U8CPU x) { SkASSERT(x <= 255); return SkIntToScalar(x) / 255; } static inline SkScalar ByteDivToScalar(int numer, U8CPU denom) { // cast to keep the answer signed return SkIntToScalar(numer) / (int)denom; } void SkRGBToHSV(U8CPU r, U8CPU g, U8CPU b, SkScalar hsv[3]) { SkASSERT(hsv); unsigned min = SkMin32(r, SkMin32(g, b)); unsigned max = SkMax32(r, SkMax32(g, b)); unsigned delta = max - min; SkScalar v = ByteToScalar(max); SkASSERT(v >= 0 && v <= SK_Scalar1); if (0 == delta) { // we're a shade of gray hsv[0] = 0; hsv[1] = 0; hsv[2] = v; return; } SkScalar s = ByteDivToScalar(delta, max); SkASSERT(s >= 0 && s <= SK_Scalar1); SkScalar h; if (r == max) { h = ByteDivToScalar(g - b, delta); } else if (g == max) { h = SkIntToScalar(2) + ByteDivToScalar(b - r, delta); } else { // b == max h = SkIntToScalar(4) + ByteDivToScalar(r - g, delta); } h *= 60; if (h < 0) { h += SkIntToScalar(360); } SkASSERT(h >= 0 && h < SkIntToScalar(360)); hsv[0] = h; hsv[1] = s; hsv[2] = v; } SkColor SkHSVToColor(U8CPU a, const SkScalar hsv[3]) { SkASSERT(hsv); SkScalar s = SkScalarPin(hsv[1], 0, 1); SkScalar v = SkScalarPin(hsv[2], 0, 1); U8CPU v_byte = SkScalarRoundToInt(v * 255); if (SkScalarNearlyZero(s)) { // shade of gray return SkColorSetARGB(a, v_byte, v_byte, v_byte); } SkScalar hx = (hsv[0] < 0 || hsv[0] >= SkIntToScalar(360)) ? 0 : hsv[0]/60; SkScalar w = SkScalarFloorToScalar(hx); SkScalar f = hx - w; unsigned p = SkScalarRoundToInt((SK_Scalar1 - s) * v * 255); unsigned q = SkScalarRoundToInt((SK_Scalar1 - (s * f)) * v * 255); unsigned t = SkScalarRoundToInt((SK_Scalar1 - (s * (SK_Scalar1 - f))) * v * 255); unsigned r, g, b; SkASSERT((unsigned)(w) < 6); switch ((unsigned)(w)) { case 0: r = v_byte; g = t; b = p; break; case 1: r = q; g = v_byte; b = p; break; case 2: r = p; g = v_byte; b = t; break; case 3: r = p; g = q; b = v_byte; break; case 4: r = t; g = p; b = v_byte; break; default: r = v_byte; g = p; b = q; break; } return SkColorSetARGB(a, r, g, b); } /////////////////////////////////////////////////////////////////////////////////////////////////// template <> SkColor4f SkColor4f::FromColor(SkColor bgra) { SkColor4f rgba; swizzle_rb(Sk4f_fromL32(bgra)).store(rgba.vec()); return rgba; } template <> SkColor SkColor4f::toSkColor() const { return Sk4f_toL32(swizzle_rb(Sk4f::Load(this->vec()))); } template <> uint32_t SkColor4f::toBytes_RGBA() const { return Sk4f_toL32(Sk4f::Load(this->vec())); } template <> SkColor4f SkColor4f::FromBytes_RGBA(uint32_t c) { SkColor4f color; Sk4f_fromL32(c).store(&color); return color; } template <> SkPMColor4f SkPMColor4f::FromPMColor(SkPMColor c) { SkPMColor4f color; swizzle_rb_if_bgra(Sk4f_fromL32(c)).store(&color); return color; } template <> uint32_t SkPMColor4f::toBytes_RGBA() const { return Sk4f_toL32(Sk4f::Load(this->vec())); } template <> SkPMColor4f SkPMColor4f::FromBytes_RGBA(uint32_t c) { SkPMColor4f color; Sk4f_fromL32(c).store(&color); return color; }