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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:36 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:36 -0800 |
commit | 6eb364108744656fcd23a96a478aa772cd4e85bc (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /src/utils/SkColorMatrix.cpp | |
parent | a23c4e24d873b11674987f97f1946e1c4d97e782 (diff) | |
download | external_skia-6eb364108744656fcd23a96a478aa772cd4e85bc.zip external_skia-6eb364108744656fcd23a96a478aa772cd4e85bc.tar.gz external_skia-6eb364108744656fcd23a96a478aa772cd4e85bc.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'src/utils/SkColorMatrix.cpp')
-rw-r--r-- | src/utils/SkColorMatrix.cpp | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/src/utils/SkColorMatrix.cpp b/src/utils/SkColorMatrix.cpp deleted file mode 100644 index 0a20990..0000000 --- a/src/utils/SkColorMatrix.cpp +++ /dev/null @@ -1,165 +0,0 @@ -#include "SkColorMatrix.h" - -#define kRScale 0 -#define kGScale 6 -#define kBScale 12 -#define kAScale 18 - -void SkColorMatrix::setIdentity() -{ - memset(fMat, 0, sizeof(fMat)); - fMat[kRScale] = fMat[kGScale] = fMat[kBScale] = fMat[kAScale] = SK_Scalar1; -} - -void SkColorMatrix::setScale(SkScalar rScale, SkScalar gScale, SkScalar bScale, - SkScalar aScale) -{ - memset(fMat, 0, sizeof(fMat)); - fMat[kRScale] = rScale; - fMat[kGScale] = gScale; - fMat[kBScale] = bScale; - fMat[kAScale] = aScale; -} - -/////////////////////////////////////////////////////////////////////////////// - -void SkColorMatrix::setRotate(Axis axis, SkScalar degrees) -{ - SkScalar S, C; - - S = SkScalarSinCos(SkDegreesToRadians(degrees), &C); - - this->setSinCos(axis, S, C); -} - -void SkColorMatrix::setSinCos(Axis axis, SkScalar sine, SkScalar cosine) -{ - SkASSERT((unsigned)axis < 3); - - static const uint8_t gRotateIndex[] = { - 6, 7, 11, 12, - 0, 2, 15, 17, - 0, 1, 5, 6, - }; - const uint8_t* index = gRotateIndex + axis * 4; - - this->setIdentity(); - fMat[index[0]] = cosine; - fMat[index[1]] = sine; - fMat[index[2]] = -sine; - fMat[index[3]] = cosine; -} - -void SkColorMatrix::preRotate(Axis axis, SkScalar degrees) -{ - SkColorMatrix tmp; - tmp.setRotate(axis, degrees); - this->preConcat(tmp); -} - -void SkColorMatrix::postRotate(Axis axis, SkScalar degrees) -{ - SkColorMatrix tmp; - tmp.setRotate(axis, degrees); - this->postConcat(tmp); -} - -/////////////////////////////////////////////////////////////////////////////// - -void SkColorMatrix::setConcat(const SkColorMatrix& matA, - const SkColorMatrix& matB) -{ - SkScalar tmp[20]; - SkScalar* result = fMat; - - if (&matA == this || &matB == this) - result = tmp; - - const SkScalar* a = matA.fMat; - const SkScalar* b = matB.fMat; - - int index = 0; - for (int j = 0; j < 20; j += 5) - { - for (int i = 0; i < 4; i++) - { - result[index++] = SkScalarMul(a[j + 0], b[i + 0]) + - SkScalarMul(a[j + 1], b[i + 5]) + - SkScalarMul(a[j + 2], b[i + 10]) + - SkScalarMul(a[j + 3], b[i + 15]); - } - result[index++] = SkScalarMul(a[j + 0], b[4]) + - SkScalarMul(a[j + 1], b[9]) + - SkScalarMul(a[j + 2], b[14]) + - SkScalarMul(a[j + 3], b[19]) + - a[j + 4]; - } - - if (fMat != result) - memcpy(fMat, result, sizeof(fMat)); -} - -/////////////////////////////////////////////////////////////////////////////// - -static void setrow(SkScalar row[], SkScalar r, SkScalar g, SkScalar b) -{ - row[0] = r; - row[1] = g; - row[2] = b; -} - -static const SkScalar kHueR = SkFloatToScalar(0.213f); -static const SkScalar kHueG = SkFloatToScalar(0.715f); -static const SkScalar kHueB = SkFloatToScalar(0.072f); - -void SkColorMatrix::setSaturation(SkScalar sat) -{ - memset(fMat, 0, sizeof(fMat)); - - const SkScalar R = SkScalarMul(kHueR, SK_Scalar1 - sat); - const SkScalar G = SkScalarMul(kHueG, SK_Scalar1 - sat); - const SkScalar B = SkScalarMul(kHueB, SK_Scalar1 - sat); - - setrow(fMat + 0, R + sat, G, B); - setrow(fMat + 5, R, G + sat, B); - setrow(fMat + 10, R, G, B + sat); - fMat[18] = SK_Scalar1; -} - -static const SkScalar kR2Y = SkFloatToScalar(0.299f); -static const SkScalar kG2Y = SkFloatToScalar(0.587f); -static const SkScalar kB2Y = SkFloatToScalar(0.114f); - -static const SkScalar kR2U = SkFloatToScalar(-0.16874f); -static const SkScalar kG2U = SkFloatToScalar(-0.33126f); -static const SkScalar kB2U = SkFloatToScalar(0.5f); - -static const SkScalar kR2V = SkFloatToScalar(0.5f); -static const SkScalar kG2V = SkFloatToScalar(-0.41869f); -static const SkScalar kB2V = SkFloatToScalar(-0.08131f); - -void SkColorMatrix::setRGB2YUV() -{ - memset(fMat, 0, sizeof(fMat)); - - setrow(fMat + 0, kR2Y, kG2Y, kB2Y); - setrow(fMat + 5, kR2U, kG2U, kB2U); - setrow(fMat + 10, kR2V, kG2V, kB2V); - fMat[18] = SK_Scalar1; -} - -static const SkScalar kV2R = SkFloatToScalar(1.402f); -static const SkScalar kU2G = SkFloatToScalar(-0.34414f); -static const SkScalar kV2G = SkFloatToScalar(-0.71414f); -static const SkScalar kU2B = SkFloatToScalar(1.772f); - -void SkColorMatrix::setYUV2RGB() -{ - memset(fMat, 0, sizeof(fMat)); - - setrow(fMat + 0, SK_Scalar1, 0, kV2R); - setrow(fMat + 5, SK_Scalar1, kU2G, kV2G); - setrow(fMat + 10, SK_Scalar1, kU2B, 0); - fMat[18] = SK_Scalar1; -} - |