static void ARGB_8888_To_RGB(const uint8_t* in, uint8_t* rgb, int width,
const SkPMColor*) {
const uint32_t* SK_RESTRICT src = (const uint32_t*)in;
for (int i = 0; i < width; ++i) {
const uint32_t c = *src++;
rgb[0] = SkGetPackedR32(c);
rgb[1] = SkGetPackedG32(c);
rgb[2] = SkGetPackedB32(c);
rgb += 3;
}
}
static void preMultipliedBGRAtoRGBA(const void* pixels, int pixelCount, unsigned char* output)
{
static const SkUnPreMultiply::Scale* scale = SkUnPreMultiply::GetScaleTable();
const SkPMColor* input = static_cast<const SkPMColor*>(pixels);
for (; pixelCount-- > 0; ++input) {
const unsigned alpha = SkGetPackedA32(*input);
if ((alpha != 0) && (alpha != 255)) {
*output++ = SkUnPreMultiply::ApplyScale(scale[alpha], SkGetPackedR32(*input));
*output++ = SkUnPreMultiply::ApplyScale(scale[alpha], SkGetPackedG32(*input));
*output++ = SkUnPreMultiply::ApplyScale(scale[alpha], SkGetPackedB32(*input));
*output++ = alpha;
} else {
*output++ = SkGetPackedR32(*input);
*output++ = SkGetPackedG32(*input);
*output++ = SkGetPackedB32(*input);
*output++ = alpha;
}
}
}
static void ToColor_SI8_Opaque(SkColor dst[], const void* src, int width,
SkColorTable* ctable) {
SkASSERT(width > 0);
const uint8_t* s = (const uint8_t*)src;
const SkPMColor* colors = ctable->lockColors();
do {
SkPMColor c = colors[*s++];
*dst++ = SkColorSetRGB(SkGetPackedR32(c), SkGetPackedG32(c),
SkGetPackedB32(c));
} while (--width != 0);
ctable->unlockColors(false);
}
// returns 0..255
static unsigned color_dist32(SkPMColor c, U8CPU r, U8CPU g, U8CPU b)
{
SkASSERT(r <= 0xFF);
SkASSERT(g <= 0xFF);
SkASSERT(b <= 0xFF);
unsigned dr = SkAbs32(SkGetPackedR32(c) - r);
unsigned dg = SkAbs32(SkGetPackedG32(c) - g);
unsigned db = SkAbs32(SkGetPackedB32(c) - b);
return SkMax32(dr, SkMax32(dg, db));
}
void SkPowerMode::xfer16(uint16_t dst[], const SkPMColor src[], int count,
const SkAlpha aa[]) {
for (int i = 0; i < count; i++) {
SkPMColor c = src[i];
int r = SkGetPackedR32(c);
int g = SkGetPackedG32(c);
int b = SkGetPackedB32(c);
r = fTable[r];
g = fTable[g];
b = fTable[b];
dst[i] = SkPack888ToRGB16(r, g, b);
}
}
static void rgb2yuv_32(uint8_t dst[], SkPMColor c) {
int r = SkGetPackedR32(c);
int g = SkGetPackedG32(c);
int b = SkGetPackedB32(c);
int y = ( CYR*r + CYG*g + CYB*b ) >> CSHIFT;
int u = ( CUR*r + CUG*g + CUB*b ) >> CSHIFT;
int v = ( CVR*r + CVG*g + CVB*b ) >> CSHIFT;
dst[0] = SkToU8(y);
dst[1] = SkToU8(u + 128);
dst[2] = SkToU8(v + 128);
}
SkColor SkPMColorToColor(SkPMColor pm)
{
if (0 == pm)
return 0;
unsigned a = SkGetPackedA32(pm);
uint32_t scale = (255 << 16) / a;
return SkColorSetARGB(a,
InvScaleByte(SkGetPackedR32(pm), scale),
InvScaleByte(SkGetPackedG32(pm), scale),
InvScaleByte(SkGetPackedB32(pm), scale));
}
static SkPMColor unpremul_pm(SkPMColor c) {
const U8CPU a = SkGetPackedA32(c);
if (0 == a) {
return 0;
} else if (0xFF == a) {
return c;
}
const unsigned scale = SkUnPreMultiply::GetScale(a);
return SkPackARGB32NoCheck(a,
SkUnPreMultiply::ApplyScale(scale, SkGetPackedR32(c)),
SkUnPreMultiply::ApplyScale(scale, SkGetPackedG32(c)),
SkUnPreMultiply::ApplyScale(scale, SkGetPackedB32(c)));
}
static void apply_gamma(const SkBitmap& bm) {
return; // below is our experiment for sRGB correction
bm.lockPixels();
for (int y = 0; y < bm.height(); ++y) {
for (int x = 0; x < bm.width(); ++x) {
SkPMColor c = *bm.getAddr32(x, y);
unsigned r = gamma(SkGetPackedR32(c));
unsigned g = gamma(SkGetPackedG32(c));
unsigned b = gamma(SkGetPackedB32(c));
*bm.getAddr32(x, y) = SkPackARGB32(0xFF, r, g, b);
}
}
}
static void blit_lcd16_opaque(SkPMColor dst[], const uint16_t src[],
SkPMColor color, int width) {
int srcR = SkGetPackedR32(color);
int srcG = SkGetPackedG32(color);
int srcB = SkGetPackedB32(color);
for (int i = 0; i < width; i++) {
uint16_t mask = src[i];
if (0 == mask) {
continue;
}
SkPMColor d = dst[i];
/* We want all of these in 5bits, hence the shifts in case one of them
* (green) is 6bits.
*/
int maskR = SkGetPackedR16(mask) >> (SK_R16_BITS - 5);
int maskG = SkGetPackedG16(mask) >> (SK_G16_BITS - 5);
int maskB = SkGetPackedB16(mask) >> (SK_B16_BITS - 5);
// Now upscale them to 0..256, so we can use SkAlphaBlend
maskR = upscale31To32(maskR);
maskG = upscale31To32(maskG);
maskB = upscale31To32(maskB);
int maskA = SkMax32(SkMax32(maskR, maskG), maskB);
int dstA = SkGetPackedA32(d);
int dstR = SkGetPackedR32(d);
int dstG = SkGetPackedG32(d);
int dstB = SkGetPackedB32(d);
dst[i] = SkPackARGB32(blend32(0xFF, dstA, maskA),
blend32(srcR, dstR, maskR),
blend32(srcG, dstG, maskG),
blend32(srcB, dstB, maskB));
}
}
static inline bool S32A_D565_Blend_1(SkPMColor sc, uint16_t dc, U8CPU alpha) {
unsigned dst_scale = 255 - SkMulDiv255Round(SkGetPackedA32(sc), alpha);
unsigned dr = (SkMulS16(SkGetPackedR32(sc), alpha) >> 3) + SkMulS16(SkGetPackedR16(dc), dst_scale);
unsigned dg = (SkMulS16(SkGetPackedG32(sc), alpha) >> 2) + SkMulS16(SkGetPackedG16(dc), dst_scale);
unsigned rr = SkDiv255Round(dr);
unsigned rg = SkDiv255Round(dg);
if (rr <= 31 && rg <= 63) {
return true;
}
return false;
}
static int similarBits(const SkBitmap& gr, const SkBitmap& sk) {
const int kRowCount = 3;
const int kThreshold = 3;
int width = SkTMin(gr.width(), sk.width());
if (width < kRowCount) {
return true;
}
int height = SkTMin(gr.height(), sk.height());
if (height < kRowCount) {
return true;
}
int errorTotal = 0;
SkTArray<char, true> errorRows;
errorRows.push_back_n(width * kRowCount);
SkAutoLockPixels autoGr(gr);
SkAutoLockPixels autoSk(sk);
char* base = &errorRows[0];
for (int y = 0; y < height; ++y) {
SkPMColor* grRow = gr.getAddr32(0, y);
SkPMColor* skRow = sk.getAddr32(0, y);
char* cOut = &errorRows[(y % kRowCount) * width];
for (int x = 0; x < width; ++x) {
SkPMColor grColor = grRow[x];
SkPMColor skColor = skRow[x];
int dr = SkGetPackedR32(grColor) - SkGetPackedR32(skColor);
int dg = SkGetPackedG32(grColor) - SkGetPackedG32(skColor);
int db = SkGetPackedB32(grColor) - SkGetPackedB32(skColor);
int error = SkTMax(SkAbs32(dr), SkTMax(SkAbs32(dg), SkAbs32(db)));
if ((cOut[x] = error >= kThreshold) && x >= 2
&& base[x - 2] && base[width + x - 2] && base[width * 2 + x - 2]
&& base[x - 1] && base[width + x - 1] && base[width * 2 + x - 1]
&& base[x - 0] && base[width + x - 0] && base[width * 2 + x - 0]) {
errorTotal += error;
}
}
}
return errorTotal;
}
bool Image::ConvertToRGBA(Image *nimg,
unsigned char *rgba,
bool flipY,
bool premultiply)
{
int length;
int k;
const unsigned char *pixels;
int width;
nimg->m_Image->lockPixels();
if ((pixels
= static_cast<const unsigned char *>(nimg->m_Image->getPixels()))
== NULL) {
nimg->m_Image->unlockPixels();
return false;
}
width = nimg->getWidth();
length = width * nimg->getHeight() * 4;
width *= 4;
k = flipY ? length - width : 0;
for (int i = 0; i < length; i += 4) {
const uint32_t pixel = *reinterpret_cast<const uint32_t *>(&pixels[i]);
int alpha = SkGetPackedA32(pixel);
if (alpha != 0 && alpha != 255 && !premultiply) {
SkColor unmultiplied = SkUnPreMultiply::PMColorToColor(pixel);
rgba[k + 0] = SkColorGetR(unmultiplied);
rgba[k + 1] = SkColorGetG(unmultiplied);
rgba[k + 2] = SkColorGetB(unmultiplied);
rgba[k + 3] = alpha;
} else {
rgba[k + 0] = SkGetPackedR32(pixel);
rgba[k + 1] = SkGetPackedG32(pixel);
rgba[k + 2] = SkGetPackedB32(pixel);
rgba[k + 3] = alpha;
}
if (flipY && (i + 4) % width == 0) {
k = length - (i + 4) - width;
} else {
k += 4;
}
}
return true;
}
static void blit_lcd32_opaque(SkPMColor dst[], const uint32_t src[],
SkPMColor color, int width) {
int srcR = SkGetPackedR32(color);
int srcG = SkGetPackedG32(color);
int srcB = SkGetPackedB32(color);
for (int i = 0; i < width; i++) {
uint32_t mask = src[i];
if (0 == mask) {
continue;
}
SkPMColor d = dst[i];
int maskR = SkGetPackedR32(mask);
int maskG = SkGetPackedG32(mask);
int maskB = SkGetPackedB32(mask);
// Now upscale them to 0..256, so we can use SkAlphaBlend
maskR = SkAlpha255To256(maskR);
maskG = SkAlpha255To256(maskG);
maskB = SkAlpha255To256(maskB);
int maskA = SkMax32(SkMax32(maskR, maskG), maskB);
int dstA = SkGetPackedA32(d);
int dstR = SkGetPackedR32(d);
int dstG = SkGetPackedG32(d);
int dstB = SkGetPackedB32(d);
dst[i] = SkPackARGB32(SkAlphaBlend(0xFF, dstA, maskA),
SkAlphaBlend(srcR, dstR, maskR),
SkAlphaBlend(srcG, dstG, maskG),
SkAlphaBlend(srcB, dstB, maskB));
}
}
void SkNormalMapSourceImpl::Provider::fillScanLine(int x, int y, SkPoint3 output[],
int count) const {
SkPMColor tmpNormalColors[BUFFER_MAX];
do {
int n = SkTMin(count, BUFFER_MAX);
fMapContext->shadeSpan(x, y, tmpNormalColors, n);
for (int i = 0; i < n; i++) {
SkPoint3 tempNorm;
tempNorm.set(SkIntToScalar(SkGetPackedR32(tmpNormalColors[i])) - 127.0f,
SkIntToScalar(SkGetPackedG32(tmpNormalColors[i])) - 127.0f,
SkIntToScalar(SkGetPackedB32(tmpNormalColors[i])) - 127.0f);
tempNorm.normalize();
if (!SkScalarNearlyEqual(SkScalarAbs(tempNorm.fZ), 1.0f)) {
SkVector transformed = fSource.fInvCTM.mapVector(tempNorm.fX, tempNorm.fY);
// Normalizing the transformed X and Y, while keeping constant both Z and the
// vector's angle in the XY plane. This maintains the "slope" for the surface while
// appropriately rotating the normal for any anisotropic scaling that occurs.
// Here, we call scaling factor the number that must divide the transformed X and Y
// so that the normal's length remains equal to 1.
SkScalar scalingFactorSquared =
(SkScalarSquare(transformed.fX) + SkScalarSquare(transformed.fY))
/ (1.0f - SkScalarSquare(tempNorm.fZ));
SkScalar invScalingFactor = SkScalarInvert(SkScalarSqrt(scalingFactorSquared));
output[i].fX = transformed.fX * invScalingFactor;
output[i].fY = transformed.fY * invScalingFactor;
output[i].fZ = tempNorm.fZ;
} else {
output[i] = {0.0f, 0.0f, tempNorm.fZ};
output[i].normalize();
}
SkASSERT(SkScalarNearlyEqual(output[i].length(), 1.0f));
}
output += n;
x += n;
count -= n;
} while (count > 0);
}
static inline bool S32A_D565_Blend_02(SkPMColor sc, uint16_t dc, U8CPU alpha) {
unsigned dst_scale = 255 - SkMulDiv255Round(SkGetPackedA32(sc), alpha);
unsigned dr = SkMulS16(SkGetPackedR32(sc), alpha) + SkMulS16(GetPackedR16As32(dc), dst_scale);
unsigned dg = SkMulS16(SkGetPackedG32(sc), alpha) + SkMulS16(GetPackedG16As32(dc), dst_scale);
unsigned db = SkMulS16(SkGetPackedB32(sc), alpha) + SkMulS16(GetPackedB16As32(dc), dst_scale);
int rc = SkPack888ToRGB16(SkDiv255Round(dr),
SkDiv255Round(dg),
SkDiv255Round(db));
unsigned rr = SkGetPackedR16(rc);
unsigned rg = SkGetPackedG16(rc);
if (rr <= 31 && rg <= 63) {
return true;
}
return false;
}
virtual void filterSpan(const SkPMColor shader[], int count,
SkPMColor result[]) {
unsigned scaleR = SkAlpha255To256(SkColorGetR(fMul));
unsigned scaleG = SkAlpha255To256(SkColorGetG(fMul));
unsigned scaleB = SkAlpha255To256(SkColorGetB(fMul));
for (int i = 0; i < count; i++) {
SkPMColor c = shader[i];
if (c) {
unsigned a = SkGetPackedA32(c);
unsigned r = SkAlphaMul(SkGetPackedR32(c), scaleR);
unsigned g = SkAlphaMul(SkGetPackedG32(c), scaleG);
unsigned b = SkAlphaMul(SkGetPackedB32(c), scaleB);
c = SkPackARGB32(a, r, g, b);
}
result[i] = c;
}
}
void SkLumaColorFilter::filterSpan(const SkPMColor src[], int count,
SkPMColor dst[]) const {
for (int i = 0; i < count; ++i) {
SkPMColor c = src[i];
/*
* While LuminanceToAlpha is defined to operate on un-premultiplied
* inputs, due to the final alpha scaling it can be computed based on
* premultipled components:
*
* LumA = (k1 * r / a + k2 * g / a + k3 * b / a) * a
* LumA = (k1 * r + k2 * g + k3 * b)
*/
unsigned luma = SkComputeLuminance(SkGetPackedR32(c),
SkGetPackedG32(c),
SkGetPackedB32(c));
dst[i] = SkPackARGB32(luma, 0, 0, 0);
}
}
virtual void filterSpan(const SkPMColor shader[], int count,
SkPMColor result[]) {
unsigned addR = SkColorGetR(fAdd);
unsigned addG = SkColorGetG(fAdd);
unsigned addB = SkColorGetB(fAdd);
for (int i = 0; i < count; i++) {
SkPMColor c = shader[i];
if (c) {
unsigned a = SkGetPackedA32(c);
unsigned scaleA = SkAlpha255To256(a);
unsigned r = pin(SkGetPackedR32(c) + SkAlphaMul(addR, scaleA), a);
unsigned g = pin(SkGetPackedG32(c) + SkAlphaMul(addG, scaleA), a);
unsigned b = pin(SkGetPackedB32(c) + SkAlphaMul(addB, scaleA), a);
c = SkPackARGB32(a, r, g, b);
}
result[i] = c;
}
}
void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src,
SkBitmap* result,
const SkIRect& r,
const SkIRect& bounds) const {
SkIRect rect(r);
if (!rect.intersect(bounds)) {
return;
}
for (int y = rect.fTop; y < rect.fBottom; ++y) {
SkPMColor* dptr = result->getAddr32(rect.fLeft - bounds.fLeft, y - bounds.fTop);
for (int x = rect.fLeft; x < rect.fRight; ++x) {
SkScalar sumA = 0, sumR = 0, sumG = 0, sumB = 0;
for (int cy = 0; cy < fKernelSize.fHeight; cy++) {
for (int cx = 0; cx < fKernelSize.fWidth; cx++) {
SkPMColor s = PixelFetcher::fetch(src,
x + cx - fKernelOffset.fX,
y + cy - fKernelOffset.fY,
bounds);
SkScalar k = fKernel[cy * fKernelSize.fWidth + cx];
if (convolveAlpha) {
sumA += SkScalarMul(SkIntToScalar(SkGetPackedA32(s)), k);
}
sumR += SkScalarMul(SkIntToScalar(SkGetPackedR32(s)), k);
sumG += SkScalarMul(SkIntToScalar(SkGetPackedG32(s)), k);
sumB += SkScalarMul(SkIntToScalar(SkGetPackedB32(s)), k);
}
}
int a = convolveAlpha
? SkClampMax(SkScalarFloorToInt(SkScalarMul(sumA, fGain) + fBias), 255)
: 255;
int r = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumR, fGain) + fBias), a);
int g = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumG, fGain) + fBias), a);
int b = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumB, fGain) + fBias), a);
if (!convolveAlpha) {
a = SkGetPackedA32(PixelFetcher::fetch(src, x, y, bounds));
*dptr++ = SkPreMultiplyARGB(a, r, g, b);
} else {
*dptr++ = SkPackARGB32(a, r, g, b);
}
}
}
}
static SkPMColor blur_pixel(const SkBitmap& bm, int x, int y, float* kernel, int wh) {
SkASSERT(wh & 0x1);
int halfFilterSize = (wh-1)/2;
float r = 0.0f, g = 0.0f, b = 0.0f;
for (int yOff = 0; yOff < wh; ++yOff) {
int ySamp = y + yOff - halfFilterSize;
if (ySamp < 0) {
ySamp = 0;
} else if (ySamp > bm.height()-1) {
ySamp = bm.height()-1;
}
for (int xOff = 0; xOff < wh; ++xOff) {
int xSamp = x + xOff - halfFilterSize;
if (xSamp < 0) {
xSamp = 0;
} else if (xSamp > bm.width()-1) {
xSamp = bm.width()-1;
}
float filter = kernel[yOff*wh + xOff];
SkPMColor c = *bm.getAddr32(xSamp, ySamp);
r += SkGetPackedR32(c) * filter;
g += SkGetPackedG32(c) * filter;
b += SkGetPackedB32(c) * filter;
}
}
U8CPU r8, g8, b8;
r8 = (U8CPU) (r+0.5f);
g8 = (U8CPU) (g+0.5f);
b8 = (U8CPU) (b+0.5f);
return SkPackARGB32(255, r8, g8, b8);
}
SkColor SkPMColorToColor(SkPMColor pm)
{
if (!pm)
return 0;
unsigned a = SkGetPackedA32(pm);
if (!a) {
// A zero alpha value when there are non-zero R, G, or B channels is an
// invalid premultiplied color (since all channels should have been
// multiplied by 0 if a=0).
SkASSERT(false);
// In production, return 0 to protect against division by zero.
return 0;
}
uint32_t scale = (255 << 16) / a;
return SkColorSetARGB(a,
InvScaleByte(SkGetPackedR32(pm), scale),
InvScaleByte(SkGetPackedG32(pm), scale),
InvScaleByte(SkGetPackedB32(pm), scale));
}
template <bool doSwapRB, AlphaVerb doAlpha> uint32_t convert32(uint32_t c) {
if (doSwapRB) {
c = SkSwizzle_RB(c);
}
// Lucky for us, in both RGBA and BGRA, the alpha component is always in the same place, so
// we can perform premul or unpremul the same way without knowing the swizzles for RGB.
switch (doAlpha) {
case kNothing_AlphaVerb:
// no change
break;
case kPremul_AlphaVerb:
c = SkPreMultiplyARGB(SkGetPackedA32(c), SkGetPackedR32(c),
SkGetPackedG32(c), SkGetPackedB32(c));
break;
case kUnpremul_AlphaVerb:
c = SkUnPreMultiply::UnPreMultiplyPreservingByteOrder(c);
break;
}
return c;
}
static SkPDFArray* make_indexed_color_space(SkColorTable* table) {
SkPDFArray* result = new SkPDFArray();
result->reserve(4);
result->appendName("Indexed");
result->appendName("DeviceRGB");
result->appendInt(table->count() - 1);
// Potentially, this could be represented in fewer bytes with a stream.
// Max size as a string is 1.5k.
SkString index;
for (int i = 0; i < table->count(); i++) {
char buf[3];
SkColor color = SkUnPreMultiply::PMColorToColor((*table)[i]);
buf[0] = SkGetPackedR32(color);
buf[1] = SkGetPackedG32(color);
buf[2] = SkGetPackedB32(color);
index.append(buf, 3);
}
result->append(new SkPDFString(index))->unref();
return result;
}
static void ARGB_8888_To_RGBA(const uint8_t* in, uint8_t* rgb, int width,
const SkPMColor*) {
const uint32_t* SK_RESTRICT src = (const uint32_t*)in;
const SkUnPreMultiply::Scale* SK_RESTRICT table =
SkUnPreMultiply::GetScaleTable();
for (int i = 0; i < width; ++i) {
const uint32_t c = *src++;
uint8_t a = SkGetPackedA32(c);
uint8_t r = SkGetPackedR32(c);
uint8_t g = SkGetPackedG32(c);
uint8_t b = SkGetPackedB32(c);
if (0 != a && 255 != a) {
SkUnPreMultiply::Scale scale = table[a];
r = SkUnPreMultiply::ApplyScale(scale, r);
g = SkUnPreMultiply::ApplyScale(scale, g);
b = SkUnPreMultiply::ApplyScale(scale, b);
}
rgb[0] = r;
rgb[1] = g;
rgb[2] = b;
rgb[3] = a;
rgb += 4;
}
}
static void erode(const SkPMColor* src, SkPMColor* dst,
int radius, int width, int height,
int srcStride, int dstStride)
{
const int srcStrideX = direction == kX ? 1 : srcStride;
const int dstStrideX = direction == kX ? 1 : dstStride;
const int srcStrideY = direction == kX ? srcStride : 1;
const int dstStrideY = direction == kX ? dstStride : 1;
radius = SkMin32(radius, width - 1);
const SkPMColor* upperSrc = src + radius * srcStrideX;
for (int x = 0; x < width; ++x) {
const SkPMColor* lp = src;
const SkPMColor* up = upperSrc;
SkPMColor* dptr = dst;
for (int y = 0; y < height; ++y) {
int minB = 255, minG = 255, minR = 255, minA = 255;
for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
int b = SkGetPackedB32(*p);
int g = SkGetPackedG32(*p);
int r = SkGetPackedR32(*p);
int a = SkGetPackedA32(*p);
if (b < minB) minB = b;
if (g < minG) minG = g;
if (r < minR) minR = r;
if (a < minA) minA = a;
}
*dptr = SkPackARGB32(minA, minR, minG, minB);
dptr += dstStrideY;
lp += srcStrideY;
up += srcStrideY;
}
if (x >= radius) src += srcStrideX;
if (x + radius < width - 1) upperSrc += srcStrideX;
dst += dstStrideX;
}
}
static void dilate(const SkPMColor* src, SkPMColor* dst,
int radius, int width, int height,
int srcStride, int dstStride)
{
const int srcStrideX = direction == kX ? 1 : srcStride;
const int dstStrideX = direction == kX ? 1 : dstStride;
const int srcStrideY = direction == kX ? srcStride : 1;
const int dstStrideY = direction == kX ? dstStride : 1;
radius = SkMin32(radius, width - 1);
const SkPMColor* upperSrc = src + radius * srcStrideX;
for (int x = 0; x < width; ++x) {
const SkPMColor* lp = src;
const SkPMColor* up = upperSrc;
SkPMColor* dptr = dst;
for (int y = 0; y < height; ++y) {
int maxB = 0, maxG = 0, maxR = 0, maxA = 0;
for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
int b = SkGetPackedB32(*p);
int g = SkGetPackedG32(*p);
int r = SkGetPackedR32(*p);
int a = SkGetPackedA32(*p);
if (b > maxB) maxB = b;
if (g > maxG) maxG = g;
if (r > maxR) maxR = r;
if (a > maxA) maxA = a;
}
*dptr = SkPackARGB32(maxA, maxR, maxG, maxB);
dptr += dstStrideY;
lp += srcStrideY;
up += srcStrideY;
}
if (x >= radius) src += srcStrideX;
if (x + radius < width - 1) upperSrc += srcStrideX;
dst += dstStrideX;
}
}
void SkBlitLCD16OpaqueRow_neon(SkPMColor dst[], const uint16_t src[],
SkColor color, int width,
SkPMColor opaqueDst) {
int colR = SkColorGetR(color);
int colG = SkColorGetG(color);
int colB = SkColorGetB(color);
uint8x8_t vcolR, vcolG, vcolB;
uint8x8_t vopqDstA, vopqDstR, vopqDstG, vopqDstB;
if (width >= 8) {
vcolR = vdup_n_u8(colR);
vcolG = vdup_n_u8(colG);
vcolB = vdup_n_u8(colB);
vopqDstA = vdup_n_u8(SkGetPackedA32(opaqueDst));
vopqDstR = vdup_n_u8(SkGetPackedR32(opaqueDst));
vopqDstG = vdup_n_u8(SkGetPackedG32(opaqueDst));
vopqDstB = vdup_n_u8(SkGetPackedB32(opaqueDst));
}
while (width >= 8) {
uint8x8x4_t vdst;
uint16x8_t vmask;
uint16x8_t vmaskR, vmaskG, vmaskB;
uint8x8_t vsel_trans, vsel_opq;
vdst = vld4_u8((uint8_t*)dst);
vmask = vld1q_u16(src);
// Prepare compare masks
vsel_trans = vmovn_u16(vceqq_u16(vmask, vdupq_n_u16(0)));
vsel_opq = vmovn_u16(vceqq_u16(vmask, vdupq_n_u16(0xFFFF)));
// Get all the color masks on 5 bits
vmaskR = vshrq_n_u16(vmask, SK_R16_SHIFT);
vmaskG = vshrq_n_u16(vshlq_n_u16(vmask, SK_R16_BITS),
SK_B16_BITS + SK_R16_BITS + 1);
vmaskB = vmask & vdupq_n_u16(SK_B16_MASK);
// Upscale to 0..32
vmaskR = vmaskR + vshrq_n_u16(vmaskR, 4);
vmaskG = vmaskG + vshrq_n_u16(vmaskG, 4);
vmaskB = vmaskB + vshrq_n_u16(vmaskB, 4);
vdst.val[NEON_A] = vbsl_u8(vsel_trans, vdst.val[NEON_A], vdup_n_u8(0xFF));
vdst.val[NEON_A] = vbsl_u8(vsel_opq, vopqDstA, vdst.val[NEON_A]);
vdst.val[NEON_R] = SkBlend32_neon8(vcolR, vdst.val[NEON_R], vmaskR);
vdst.val[NEON_G] = SkBlend32_neon8(vcolG, vdst.val[NEON_G], vmaskG);
vdst.val[NEON_B] = SkBlend32_neon8(vcolB, vdst.val[NEON_B], vmaskB);
vdst.val[NEON_R] = vbsl_u8(vsel_opq, vopqDstR, vdst.val[NEON_R]);
vdst.val[NEON_G] = vbsl_u8(vsel_opq, vopqDstG, vdst.val[NEON_G]);
vdst.val[NEON_B] = vbsl_u8(vsel_opq, vopqDstB, vdst.val[NEON_B]);
vst4_u8((uint8_t*)dst, vdst);
dst += 8;
src += 8;
width -= 8;
}
// Leftovers
for (int i = 0; i < width; i++) {
dst[i] = SkBlendLCD16Opaque(colR, colG, colB, dst[i], src[i],
opaqueDst);
}
}
/**
* Test decoding an image in premultiplied mode and unpremultiplied mode and compare
* them.
*/
static void compare_unpremul(skiatest::Reporter* reporter, const SkString& filename) {
// Decode a resource:
SkBitmap bm8888;
SkBitmap bm8888Unpremul;
SkFILEStream stream(filename.c_str());
SkImageDecoder::Format format = SkImageDecoder::GetStreamFormat(&stream);
if (skip_image_format(format)) {
return;
}
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
if (NULL == decoder.get()) {
SkDebugf("couldn't decode %s\n", filename.c_str());
return;
}
bool success = decoder->decode(&stream, &bm8888, SkBitmap::kARGB_8888_Config,
SkImageDecoder::kDecodePixels_Mode);
if (!success) {
return;
}
success = stream.rewind();
REPORTER_ASSERT(reporter, success);
if (!success) {
return;
}
decoder->setRequireUnpremultipliedColors(true);
success = decoder->decode(&stream, &bm8888Unpremul, SkBitmap::kARGB_8888_Config,
SkImageDecoder::kDecodePixels_Mode);
if (!success) {
return;
}
bool dimensionsMatch = bm8888.width() == bm8888Unpremul.width()
&& bm8888.height() == bm8888Unpremul.height();
REPORTER_ASSERT(reporter, dimensionsMatch);
if (!dimensionsMatch) {
return;
}
// Only do the comparison if the two bitmaps are both 8888.
if (bm8888.config() != SkBitmap::kARGB_8888_Config
|| bm8888Unpremul.config() != SkBitmap::kARGB_8888_Config) {
return;
}
// Now compare the two bitmaps.
for (int i = 0; i < bm8888.width(); ++i) {
for (int j = 0; j < bm8888.height(); ++j) {
// "c0" is the color of the premultiplied bitmap at (i, j).
const SkPMColor c0 = *bm8888.getAddr32(i, j);
// "c1" is the result of premultiplying the color of the unpremultiplied
// bitmap at (i, j).
const SkPMColor c1 = premultiply_unpmcolor(*bm8888Unpremul.getAddr32(i, j));
// Compute the difference for each component.
int da = SkAbs32(SkGetPackedA32(c0) - SkGetPackedA32(c1));
int dr = SkAbs32(SkGetPackedR32(c0) - SkGetPackedR32(c1));
int dg = SkAbs32(SkGetPackedG32(c0) - SkGetPackedG32(c1));
int db = SkAbs32(SkGetPackedB32(c0) - SkGetPackedB32(c1));
// Alpha component must be exactly the same.
REPORTER_ASSERT(reporter, 0 == da);
// Color components may not match exactly due to rounding error.
REPORTER_ASSERT(reporter, dr <= 1);
REPORTER_ASSERT(reporter, dg <= 1);
REPORTER_ASSERT(reporter, db <= 1);
}
}
}
// static
SkBitmap ImageOperations::ResizeSubpixel(const SkBitmap& source,
int dest_width, int dest_height,
const SkIRect& dest_subset) {
// Currently only works on Linux/BSD because these are the only platforms
// where SkFontHost::GetSubpixelOrder is defined.
#if defined(XP_UNIX)
// Understand the display.
const SkFontHost::LCDOrder order = SkFontHost::GetSubpixelOrder();
const SkFontHost::LCDOrientation orientation =
SkFontHost::GetSubpixelOrientation();
// Decide on which dimension, if any, to deploy subpixel rendering.
int w = 1;
int h = 1;
switch (orientation) {
case SkFontHost::kHorizontal_LCDOrientation:
w = dest_width < source.width() ? 3 : 1;
break;
case SkFontHost::kVertical_LCDOrientation:
h = dest_height < source.height() ? 3 : 1;
break;
}
// Resize the image.
const int width = dest_width * w;
const int height = dest_height * h;
SkIRect subset = { dest_subset.fLeft, dest_subset.fTop,
dest_subset.fLeft + dest_subset.width() * w,
dest_subset.fTop + dest_subset.height() * h };
SkBitmap img = ResizeBasic(source, ImageOperations::RESIZE_LANCZOS3, width,
height, subset);
const int row_words = img.rowBytes() / 4;
if (w == 1 && h == 1)
return img;
// Render into subpixels.
SkBitmap result;
SkImageInfo info = SkImageInfo::Make(dest_subset.width(),
dest_subset.height(),
kBGRA_8888_SkColorType,
kPremul_SkAlphaType);
result.allocPixels(info);
if (!result.readyToDraw())
return img;
SkAutoLockPixels locker(img);
if (!img.readyToDraw())
return img;
uint32_t* src_row = img.getAddr32(0, 0);
uint32_t* dst_row = result.getAddr32(0, 0);
for (int y = 0; y < dest_subset.height(); y++) {
uint32_t* src = src_row;
uint32_t* dst = dst_row;
for (int x = 0; x < dest_subset.width(); x++, src += w, dst++) {
uint8_t r = 0, g = 0, b = 0, a = 0;
switch (order) {
case SkFontHost::kRGB_LCDOrder:
switch (orientation) {
case SkFontHost::kHorizontal_LCDOrientation:
r = SkGetPackedR32(src[0]);
g = SkGetPackedG32(src[1]);
b = SkGetPackedB32(src[2]);
a = SkGetPackedA32(src[1]);
break;
case SkFontHost::kVertical_LCDOrientation:
r = SkGetPackedR32(src[0 * row_words]);
g = SkGetPackedG32(src[1 * row_words]);
b = SkGetPackedB32(src[2 * row_words]);
a = SkGetPackedA32(src[1 * row_words]);
break;
}
break;
case SkFontHost::kBGR_LCDOrder:
switch (orientation) {
case SkFontHost::kHorizontal_LCDOrientation:
b = SkGetPackedB32(src[0]);
g = SkGetPackedG32(src[1]);
r = SkGetPackedR32(src[2]);
a = SkGetPackedA32(src[1]);
break;
case SkFontHost::kVertical_LCDOrientation:
b = SkGetPackedB32(src[0 * row_words]);
g = SkGetPackedG32(src[1 * row_words]);
r = SkGetPackedR32(src[2 * row_words]);
a = SkGetPackedA32(src[1 * row_words]);
break;
}
break;
case SkFontHost::kNONE_LCDOrder:
break;
}
// Premultiplied alpha is very fragile.
a = a > r ? a : r;
a = a > g ? a : g;
a = a > b ? a : b;
*dst = SkPackARGB32(a, r, g, b);
}
src_row += h * row_words;
dst_row += result.rowBytes() / 4;
}
result.setAlphaType(img.alphaType());
return result;
#else
return SkBitmap();
#endif // OS_POSIX && !OS_MACOSX && !defined(OS_ANDROID)
}
