void SkBaseDevice::LogDrawScaleFactor(const SkMatrix& matrix, SkFilterQuality filterQuality) {
#if SK_HISTOGRAMS_ENABLED
enum ScaleFactor {
kUpscale_ScaleFactor,
kNoScale_ScaleFactor,
kDownscale_ScaleFactor,
kLargeDownscale_ScaleFactor,
kLast_ScaleFactor = kLargeDownscale_ScaleFactor
};
float rawScaleFactor = matrix.getMinScale();
ScaleFactor scaleFactor;
if (rawScaleFactor < 0.5f) {
scaleFactor = kLargeDownscale_ScaleFactor;
} else if (rawScaleFactor < 1.0f) {
scaleFactor = kDownscale_ScaleFactor;
} else if (rawScaleFactor > 1.0f) {
scaleFactor = kUpscale_ScaleFactor;
} else {
scaleFactor = kNoScale_ScaleFactor;
}
switch (filterQuality) {
case kNone_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.NoneFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
case kLow_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.LowFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
case kMedium_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.MediumFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
case kHigh_SkFilterQuality:
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.HighFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
break;
}
// Also log filter quality independent scale factor.
SK_HISTOGRAM_ENUMERATION("DrawScaleFactor.AnyFilterQuality", scaleFactor,
kLast_ScaleFactor + 1);
// Also log an overall histogram of filter quality.
SK_HISTOGRAM_ENUMERATION("FilterQuality", filterQuality, kLast_SkFilterQuality + 1);
#endif
}
GrSamplerState::Filter GrSkFilterQualityToGrFilterMode(SkFilterQuality paintFilterQuality,
const SkMatrix& viewM,
const SkMatrix& localM,
bool sharpenMipmappedTextures,
bool* doBicubic) {
*doBicubic = false;
GrSamplerState::Filter textureFilterMode;
switch (paintFilterQuality) {
case kNone_SkFilterQuality:
textureFilterMode = GrSamplerState::Filter::kNearest;
break;
case kLow_SkFilterQuality:
textureFilterMode = GrSamplerState::Filter::kBilerp;
break;
case kMedium_SkFilterQuality: {
SkMatrix matrix;
matrix.setConcat(viewM, localM);
// With sharp mips, we bias lookups by -0.5. That means our final LOD is >= 0 until the
// computed LOD is >= 0.5. At what scale factor does a texture get an LOD of 0.5?
//
// Want: 0 = log2(1/s) - 0.5
// 0.5 = log2(1/s)
// 2^0.5 = 1/s
// 1/2^0.5 = s
// 2^0.5/2 = s
SkScalar mipScale = sharpenMipmappedTextures ? SK_ScalarRoot2Over2 : SK_Scalar1;
if (matrix.getMinScale() < mipScale) {
textureFilterMode = GrSamplerState::Filter::kMipMap;
} else {
// Don't trigger MIP level generation unnecessarily.
textureFilterMode = GrSamplerState::Filter::kBilerp;
}
break;
}
case kHigh_SkFilterQuality: {
SkMatrix matrix;
matrix.setConcat(viewM, localM);
*doBicubic = GrBicubicEffect::ShouldUseBicubic(matrix, &textureFilterMode);
break;
}
default:
// Should be unreachable. If not, fall back to mipmaps.
textureFilterMode = GrSamplerState::Filter::kMipMap;
break;
}
return textureFilterMode;
}
GrTextureParams::FilterMode GrSkFilterQualityToGrFilterMode(SkFilterQuality paintFilterQuality,
const SkMatrix& viewM,
const SkMatrix& localM,
bool* doBicubic) {
*doBicubic = false;
GrTextureParams::FilterMode textureFilterMode;
switch (paintFilterQuality) {
case kNone_SkFilterQuality:
textureFilterMode = GrTextureParams::kNone_FilterMode;
break;
case kLow_SkFilterQuality:
textureFilterMode = GrTextureParams::kBilerp_FilterMode;
break;
case kMedium_SkFilterQuality: {
SkMatrix matrix;
matrix.setConcat(viewM, localM);
if (matrix.getMinScale() < SK_Scalar1) {
textureFilterMode = GrTextureParams::kMipMap_FilterMode;
} else {
// Don't trigger MIP level generation unnecessarily.
textureFilterMode = GrTextureParams::kBilerp_FilterMode;
}
break;
}
case kHigh_SkFilterQuality: {
SkMatrix matrix;
matrix.setConcat(viewM, localM);
*doBicubic = GrBicubicEffect::ShouldUseBicubic(matrix, &textureFilterMode);
break;
}
default:
SkErrorInternals::SetError( kInvalidPaint_SkError,
"Sorry, I don't understand the filtering "
"mode you asked for. Falling back to "
"MIPMaps.");
textureFilterMode = GrTextureParams::kMipMap_FilterMode;
break;
}
return textureFilterMode;
}
static void test_matrix_min_max_scale(skiatest::Reporter* reporter) {
SkScalar scales[2];
bool success;
SkMatrix identity;
identity.reset();
REPORTER_ASSERT(reporter, SK_Scalar1 == identity.getMinScale());
REPORTER_ASSERT(reporter, SK_Scalar1 == identity.getMaxScale());
success = identity.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, success && SK_Scalar1 == scales[0] && SK_Scalar1 == scales[1]);
SkMatrix scale;
scale.setScale(SK_Scalar1 * 2, SK_Scalar1 * 4);
REPORTER_ASSERT(reporter, SK_Scalar1 * 2 == scale.getMinScale());
REPORTER_ASSERT(reporter, SK_Scalar1 * 4 == scale.getMaxScale());
success = scale.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, success && SK_Scalar1 * 2 == scales[0] && SK_Scalar1 * 4 == scales[1]);
SkMatrix rot90Scale;
rot90Scale.setRotate(90 * SK_Scalar1);
rot90Scale.postScale(SK_Scalar1 / 4, SK_Scalar1 / 2);
REPORTER_ASSERT(reporter, SK_Scalar1 / 4 == rot90Scale.getMinScale());
REPORTER_ASSERT(reporter, SK_Scalar1 / 2 == rot90Scale.getMaxScale());
success = rot90Scale.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, success && SK_Scalar1 / 4 == scales[0] && SK_Scalar1 / 2 == scales[1]);
SkMatrix rotate;
rotate.setRotate(128 * SK_Scalar1);
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SK_Scalar1, rotate.getMinScale(), SK_ScalarNearlyZero));
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SK_Scalar1, rotate.getMaxScale(), SK_ScalarNearlyZero));
success = rotate.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, success);
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SK_Scalar1, scales[0], SK_ScalarNearlyZero));
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SK_Scalar1, scales[1], SK_ScalarNearlyZero));
SkMatrix translate;
translate.setTranslate(10 * SK_Scalar1, -5 * SK_Scalar1);
REPORTER_ASSERT(reporter, SK_Scalar1 == translate.getMinScale());
REPORTER_ASSERT(reporter, SK_Scalar1 == translate.getMaxScale());
success = translate.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, success && SK_Scalar1 == scales[0] && SK_Scalar1 == scales[1]);
SkMatrix perspX;
perspX.reset();
perspX.setPerspX(SkScalarToPersp(SK_Scalar1 / 1000));
REPORTER_ASSERT(reporter, -SK_Scalar1 == perspX.getMinScale());
REPORTER_ASSERT(reporter, -SK_Scalar1 == perspX.getMaxScale());
// Verify that getMinMaxScales() doesn't update the scales array on failure.
scales[0] = -5;
scales[1] = -5;
success = perspX.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, !success && -5 * SK_Scalar1 == scales[0] && -5 * SK_Scalar1 == scales[1]);
SkMatrix perspY;
perspY.reset();
perspY.setPerspY(SkScalarToPersp(-SK_Scalar1 / 500));
REPORTER_ASSERT(reporter, -SK_Scalar1 == perspY.getMinScale());
REPORTER_ASSERT(reporter, -SK_Scalar1 == perspY.getMaxScale());
scales[0] = -5;
scales[1] = -5;
success = perspY.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, !success && -5 * SK_Scalar1 == scales[0] && -5 * SK_Scalar1 == scales[1]);
SkMatrix baseMats[] = {scale, rot90Scale, rotate,
translate, perspX, perspY};
SkMatrix mats[2*SK_ARRAY_COUNT(baseMats)];
for (size_t i = 0; i < SK_ARRAY_COUNT(baseMats); ++i) {
mats[i] = baseMats[i];
bool invertable = mats[i].invert(&mats[i + SK_ARRAY_COUNT(baseMats)]);
REPORTER_ASSERT(reporter, invertable);
}
SkRandom rand;
for (int m = 0; m < 1000; ++m) {
SkMatrix mat;
mat.reset();
for (int i = 0; i < 4; ++i) {
int x = rand.nextU() % SK_ARRAY_COUNT(mats);
mat.postConcat(mats[x]);
}
SkScalar minScale = mat.getMinScale();
SkScalar maxScale = mat.getMaxScale();
REPORTER_ASSERT(reporter, (minScale < 0) == (maxScale < 0));
REPORTER_ASSERT(reporter, (maxScale < 0) == mat.hasPerspective());
SkScalar scales[2];
bool success = mat.getMinMaxScales(scales);
REPORTER_ASSERT(reporter, success == !mat.hasPerspective());
REPORTER_ASSERT(reporter, !success || (scales[0] == minScale && scales[1] == maxScale));
if (mat.hasPerspective()) {
m -= 1; // try another non-persp matrix
continue;
}
// test a bunch of vectors. All should be scaled by between minScale and maxScale
// (modulo some error) and we should find a vector that is scaled by almost each.
static const SkScalar gVectorScaleTol = (105 * SK_Scalar1) / 100;
static const SkScalar gCloseScaleTol = (97 * SK_Scalar1) / 100;
SkScalar max = 0, min = SK_ScalarMax;
SkVector vectors[1000];
for (size_t i = 0; i < SK_ARRAY_COUNT(vectors); ++i) {
vectors[i].fX = rand.nextSScalar1();
vectors[i].fY = rand.nextSScalar1();
if (!vectors[i].normalize()) {
i -= 1;
continue;
}
}
mat.mapVectors(vectors, SK_ARRAY_COUNT(vectors));
for (size_t i = 0; i < SK_ARRAY_COUNT(vectors); ++i) {
SkScalar d = vectors[i].length();
REPORTER_ASSERT(reporter, SkScalarDiv(d, maxScale) < gVectorScaleTol);
REPORTER_ASSERT(reporter, SkScalarDiv(minScale, d) < gVectorScaleTol);
if (max < d) {
max = d;
}
if (min > d) {
min = d;
}
}
REPORTER_ASSERT(reporter, SkScalarDiv(max, maxScale) >= gCloseScaleTol);
REPORTER_ASSERT(reporter, SkScalarDiv(minScale, min) >= gCloseScaleTol);
}
}
bool SkBitmapProcShader::asNewEffect(GrContext* context, const SkPaint& paint,
const SkMatrix* localMatrix, GrColor* grColor,
GrEffectRef** grEffect) const {
SkMatrix matrix;
matrix.setIDiv(fRawBitmap.width(), fRawBitmap.height());
SkMatrix lmInverse;
if (!this->getLocalMatrix().invert(&lmInverse)) {
return false;
}
if (localMatrix) {
SkMatrix inv;
if (!localMatrix->invert(&inv)) {
return false;
}
lmInverse.postConcat(inv);
}
matrix.preConcat(lmInverse);
SkShader::TileMode tm[] = {
(TileMode)fTileModeX,
(TileMode)fTileModeY,
};
// Must set wrap and filter on the sampler before requesting a texture. In two places below
// we check the matrix scale factors to determine how to interpret the filter quality setting.
// This completely ignores the complexity of the drawVertices case where explicit local coords
// are provided by the caller.
bool useBicubic = false;
GrTextureParams::FilterMode textureFilterMode;
switch(paint.getFilterLevel()) {
case SkPaint::kNone_FilterLevel:
textureFilterMode = GrTextureParams::kNone_FilterMode;
break;
case SkPaint::kLow_FilterLevel:
textureFilterMode = GrTextureParams::kBilerp_FilterMode;
break;
case SkPaint::kMedium_FilterLevel: {
SkMatrix matrix;
matrix.setConcat(context->getMatrix(), this->getLocalMatrix());
if (matrix.getMinScale() < SK_Scalar1) {
textureFilterMode = GrTextureParams::kMipMap_FilterMode;
} else {
// Don't trigger MIP level generation unnecessarily.
textureFilterMode = GrTextureParams::kBilerp_FilterMode;
}
break;
}
case SkPaint::kHigh_FilterLevel: {
SkMatrix matrix;
matrix.setConcat(context->getMatrix(), this->getLocalMatrix());
useBicubic = GrBicubicEffect::ShouldUseBicubic(matrix, &textureFilterMode);
break;
}
default:
SkErrorInternals::SetError( kInvalidPaint_SkError,
"Sorry, I don't understand the filtering "
"mode you asked for. Falling back to "
"MIPMaps.");
textureFilterMode = GrTextureParams::kMipMap_FilterMode;
break;
}
GrTextureParams params(tm, textureFilterMode);
GrTexture* texture = GrLockAndRefCachedBitmapTexture(context, fRawBitmap, ¶ms);
if (NULL == texture) {
SkErrorInternals::SetError( kInternalError_SkError,
"Couldn't convert bitmap to texture.");
return false;
}
*grColor = (kAlpha_8_SkColorType == fRawBitmap.colorType()) ? SkColor2GrColor(paint.getColor())
: SkColor2GrColorJustAlpha(paint.getColor());
if (useBicubic) {
*grEffect = GrBicubicEffect::Create(texture, matrix, tm);
} else {
*grEffect = GrSimpleTextureEffect::Create(texture, matrix, params);
}
GrUnlockAndUnrefCachedBitmapTexture(texture);
return true;
}
void GetLocalBounds(const SkPath& path, const SkDrawShadowRec& rec, const SkMatrix& ctm,
SkRect* bounds) {
SkRect ambientBounds = path.getBounds();
SkScalar occluderZ;
if (SkScalarNearlyZero(rec.fZPlaneParams.fX) && SkScalarNearlyZero(rec.fZPlaneParams.fY)) {
occluderZ = rec.fZPlaneParams.fZ;
} else {
occluderZ = compute_z(ambientBounds.fLeft, ambientBounds.fTop, rec.fZPlaneParams);
occluderZ = SkTMax(occluderZ, compute_z(ambientBounds.fRight, ambientBounds.fTop,
rec.fZPlaneParams));
occluderZ = SkTMax(occluderZ, compute_z(ambientBounds.fLeft, ambientBounds.fBottom,
rec.fZPlaneParams));
occluderZ = SkTMax(occluderZ, compute_z(ambientBounds.fRight, ambientBounds.fBottom,
rec.fZPlaneParams));
}
SkScalar ambientBlur;
SkScalar spotBlur;
SkScalar spotScale;
SkPoint spotOffset;
if (ctm.hasPerspective()) {
// transform ambient and spot bounds into device space
ctm.mapRect(&ambientBounds);
// get ambient blur (in device space)
ambientBlur = SkDrawShadowMetrics::AmbientBlurRadius(occluderZ);
// get spot params (in device space)
SkPoint devLightPos = SkPoint::Make(rec.fLightPos.fX, rec.fLightPos.fY);
ctm.mapPoints(&devLightPos, 1);
SkDrawShadowMetrics::GetSpotParams(occluderZ, devLightPos.fX, devLightPos.fY,
rec.fLightPos.fZ, rec.fLightRadius,
&spotBlur, &spotScale, &spotOffset);
} else {
SkScalar devToSrcScale = SkScalarInvert(ctm.getMinScale());
// get ambient blur (in local space)
SkScalar devSpaceAmbientBlur = SkDrawShadowMetrics::AmbientBlurRadius(occluderZ);
ambientBlur = devSpaceAmbientBlur*devToSrcScale;
// get spot params (in local space)
SkDrawShadowMetrics::GetSpotParams(occluderZ, rec.fLightPos.fX, rec.fLightPos.fY,
rec.fLightPos.fZ, rec.fLightRadius,
&spotBlur, &spotScale, &spotOffset);
// convert spot blur to local space
spotBlur *= devToSrcScale;
}
// in both cases, adjust ambient and spot bounds
SkRect spotBounds = ambientBounds;
ambientBounds.outset(ambientBlur, ambientBlur);
spotBounds.fLeft *= spotScale;
spotBounds.fTop *= spotScale;
spotBounds.fRight *= spotScale;
spotBounds.fBottom *= spotScale;
spotBounds.offset(spotOffset.fX, spotOffset.fY);
spotBounds.outset(spotBlur, spotBlur);
// merge bounds
*bounds = ambientBounds;
bounds->join(spotBounds);
// outset a bit to account for floating point error
bounds->outset(1, 1);
// if perspective, transform back to src space
if (ctm.hasPerspective()) {
// TODO: create tighter mapping from dev rect back to src rect
SkMatrix inverse;
if (ctm.invert(&inverse)) {
inverse.mapRect(bounds);
}
}
}
bool LightingShader::asFragmentProcessor(GrContext* context, const SkPaint& paint,
const SkMatrix& viewM, const SkMatrix* localMatrix,
GrColor* color, GrProcessorDataManager*,
GrFragmentProcessor** fp) const {
// we assume diffuse and normal maps have same width and height
// TODO: support different sizes
SkASSERT(fDiffuseMap.width() == fNormalMap.width() &&
fDiffuseMap.height() == fNormalMap.height());
SkMatrix matrix;
matrix.setIDiv(fDiffuseMap.width(), fDiffuseMap.height());
SkMatrix lmInverse;
if (!this->getLocalMatrix().invert(&lmInverse)) {
return false;
}
if (localMatrix) {
SkMatrix inv;
if (!localMatrix->invert(&inv)) {
return false;
}
lmInverse.postConcat(inv);
}
matrix.preConcat(lmInverse);
// Must set wrap and filter on the sampler before requesting a texture. In two places below
// we check the matrix scale factors to determine how to interpret the filter quality setting.
// This completely ignores the complexity of the drawVertices case where explicit local coords
// are provided by the caller.
GrTextureParams::FilterMode textureFilterMode = GrTextureParams::kBilerp_FilterMode;
switch (paint.getFilterQuality()) {
case kNone_SkFilterQuality:
textureFilterMode = GrTextureParams::kNone_FilterMode;
break;
case kLow_SkFilterQuality:
textureFilterMode = GrTextureParams::kBilerp_FilterMode;
break;
case kMedium_SkFilterQuality:{
SkMatrix matrix;
matrix.setConcat(viewM, this->getLocalMatrix());
if (matrix.getMinScale() < SK_Scalar1) {
textureFilterMode = GrTextureParams::kMipMap_FilterMode;
} else {
// Don't trigger MIP level generation unnecessarily.
textureFilterMode = GrTextureParams::kBilerp_FilterMode;
}
break;
}
case kHigh_SkFilterQuality:
default:
SkErrorInternals::SetError(kInvalidPaint_SkError,
"Sorry, I don't understand the filtering "
"mode you asked for. Falling back to "
"MIPMaps.");
textureFilterMode = GrTextureParams::kMipMap_FilterMode;
break;
}
// TODO: support other tile modes
GrTextureParams params(kClamp_TileMode, textureFilterMode);
SkAutoTUnref<GrTexture> diffuseTexture(GrRefCachedBitmapTexture(context, fDiffuseMap, ¶ms));
if (!diffuseTexture) {
SkErrorInternals::SetError(kInternalError_SkError,
"Couldn't convert bitmap to texture.");
return false;
}
SkAutoTUnref<GrTexture> normalTexture(GrRefCachedBitmapTexture(context, fNormalMap, ¶ms));
if (!normalTexture) {
SkErrorInternals::SetError(kInternalError_SkError,
"Couldn't convert bitmap to texture.");
return false;
}
GrColor lightColor = GrColorPackRGBA(SkColorGetR(fLight.fColor), SkColorGetG(fLight.fColor),
SkColorGetB(fLight.fColor), SkColorGetA(fLight.fColor));
GrColor ambientColor = GrColorPackRGBA(SkColorGetR(fAmbientColor), SkColorGetG(fAmbientColor),
SkColorGetB(fAmbientColor), SkColorGetA(fAmbientColor));
*fp = SkNEW_ARGS(LightingFP, (diffuseTexture, normalTexture, matrix,
fLight.fDirection, lightColor, ambientColor));
*color = GrColorPackA4(paint.getAlpha());
return true;
}