AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

SkPixmap::getColor()

Browse Source 
Implement SkBitmap::getColor() in terms of SkPixmap::getColor().

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4160

Change-Id: I6192a7979d82b3d301a06ae1339bcab4c7ebf7c1
Reviewed-on: https://skia-review.googlesource.com/4160
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
This commit is contained in:
Hal Canary 2016-10-31 09:38:12 -04:00 committed by Skia Commit-Bot
parent d280d425bd
commit 94e1a2fa4a
4 changed files with 76 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
include/core/SkBitmap.h
View File

@ -525,13 +525,19 @@ public:
}
/**
* Return the SkColor of the specified pixel. In most cases this will
* require un-premultiplying the color. Alpha only colortypes (e.g. kAlpha_8_SkColorType)
* return black with the appropriate alpha set. The value is undefined
* for kUnknown_SkColorType or if x or y are out of bounds, or if the bitmap
* does not have any pixels (or has not be locked with lockPixels()).
* Converts the pixel at the specified coordinate to an unpremultiplied
* SkColor. Note: this ignores any SkColorSpace information, and may return
* lower precision data than is actually in the pixel. Alpha only
* colortypes (e.g. kAlpha_8_SkColorType) return black with the appropriate
* alpha set. The value is undefined for kUnknown_SkColorType or if x or y
* are out of bounds, or if the bitmap does not have any pixels (or has not
* be locked with lockPixels())..
*/
SkColor getColor(int x, int y) const;
SkColor getColor(int x, int y) const {
SkPixmap pixmap;
SkAssertResult(this->peekPixels(&pixmap));
return pixmap.getColor(x, y);
}
/** Returns the address of the specified pixel. This performs a runtime
check to know the size of the pixels, and will return the same answer

10
include/core/SkPixmap.h
View File

@ -89,6 +89,16 @@ public:
uint64_t getSafeSize64() const { return fInfo.getSafeSize64(fRowBytes); }
size_t getSafeSize() const { return fInfo.getSafeSize(fRowBytes); }
/**
* Converts the pixel at the specified coordinate to an unpremultiplied
* SkColor. Note: this ignores any SkColorSpace information, and may return
* lower precision data than is actually in the pixel. Alpha only
* colortypes (e.g. kAlpha_8_SkColorType) return black with the appropriate
* alpha set. The value is undefined for kUnknown_SkColorType or if x or y
* are out of bounds, or if the pixtap does not have any pixels.
*/
SkColor getColor(int x, int y) const;
const void* addr(int x, int y) const {
return (const char*)fPixels + fInfo.computeOffset(x, y, fRowBytes);
}

58
src/core/SkBitmap.cpp
View File

@ -561,64 +561,6 @@ void* SkBitmap::getAddr(int x, int y) const {
return base;
}
#include "SkHalf.h"
SkColor SkBitmap::getColor(int x, int y) const {
SkASSERT((unsigned)x < (unsigned)this->width());
SkASSERT((unsigned)y < (unsigned)this->height());
switch (this->colorType()) {
case kGray_8_SkColorType: {
uint8_t* addr = this->getAddr8(x, y);
return SkColorSetRGB(*addr, *addr, *addr);
}
case kAlpha_8_SkColorType: {
uint8_t* addr = this->getAddr8(x, y);
return SkColorSetA(0, addr[0]);
}
case kIndex_8_SkColorType: {
SkPMColor c = this->getIndex8Color(x, y);
return SkUnPreMultiply::PMColorToColor(c);
}
case kRGB_565_SkColorType: {
uint16_t* addr = this->getAddr16(x, y);
return SkPixel16ToColor(addr[0]);
}
case kARGB_4444_SkColorType: {
uint16_t* addr = this->getAddr16(x, y);
SkPMColor c = SkPixel4444ToPixel32(addr[0]);
return SkUnPreMultiply::PMColorToColor(c);
}
case kBGRA_8888_SkColorType: {
uint32_t* addr = this->getAddr32(x, y);
SkPMColor c = SkSwizzle_BGRA_to_PMColor(addr[0]);
return SkUnPreMultiply::PMColorToColor(c);
}
case kRGBA_8888_SkColorType: {
uint32_t* addr = this->getAddr32(x, y);
SkPMColor c = SkSwizzle_RGBA_to_PMColor(addr[0]);
return SkUnPreMultiply::PMColorToColor(c);
}
case kRGBA_F16_SkColorType: {
const uint64_t* addr = (const uint64_t*)fPixels + y * (fRowBytes >> 3) + x;
Sk4f p4 = SkHalfToFloat_finite_ftz(addr[0]);
if (p4[3]) {
float inva = 1 / p4[3];
p4 = p4 * Sk4f(inva, inva, inva, 1);
}
SkColor c;
SkNx_cast<uint8_t>(p4 * Sk4f(255) + Sk4f(0.5f)).store(&c);
// p4 is RGBA, but we want BGRA, so we need to swap next
return SkSwizzle_RB(c);
}
default:
SkASSERT(false);
return 0;
}
SkASSERT(false); // Not reached.
return 0;
}
static bool compute_is_opaque(const SkPixmap& pmap) {
const int height = pmap.height();
const int width = pmap.width();

54
src/core/SkPixmap.cpp
View File

@ -274,3 +274,57 @@ bool SkPixmap::scalePixels(const SkPixmap& dst, SkFilterQuality quality) const {
}
//////////////////////////////////////////////////////////////////////////////////////////////////
SkColor SkPixmap::getColor(int x, int y) const {
SkASSERT(this->addr());
SkASSERT((unsigned)x < (unsigned)this->width());
SkASSERT((unsigned)y < (unsigned)this->height());
switch (this->colorType()) {
case kGray_8_SkColorType: {
uint8_t value = *this->addr8(x, y);
return SkColorSetRGB(value, value, value);
}
case kAlpha_8_SkColorType: {
return SkColorSetA(0, *this->addr8(x, y));
}
case kIndex_8_SkColorType: {
SkASSERT(this->ctable());
SkPMColor pmColor = (*this->ctable())[*this->addr8(x, y)];
return SkUnPreMultiply::PMColorToColor(pmColor);
}
case kRGB_565_SkColorType: {
return SkPixel16ToColor(*this->addr16(x, y));
}
case kARGB_4444_SkColorType: {
uint16_t value = *this->addr16(x, y);
SkPMColor c = SkPixel4444ToPixel32(value);
return SkUnPreMultiply::PMColorToColor(c);
}
case kBGRA_8888_SkColorType: {
uint32_t value = *this->addr32(x, y);
SkPMColor c = SkSwizzle_BGRA_to_PMColor(value);
return SkUnPreMultiply::PMColorToColor(c);
}
case kRGBA_8888_SkColorType: {
uint32_t value = *this->addr32(x, y);
SkPMColor c = SkSwizzle_RGBA_to_PMColor(value);
return SkUnPreMultiply::PMColorToColor(c);
}
case kRGBA_F16_SkColorType: {
const uint64_t* addr =
(const uint64_t*)fPixels + y * (fRowBytes >> 3) + x;
Sk4f p4 = SkHalfToFloat_finite_ftz(*addr);
if (p4[3]) {
float inva = 1 / p4[3];
p4 = p4 * Sk4f(inva, inva, inva, 1);
}
SkColor c;
SkNx_cast<uint8_t>(p4 * Sk4f(255) + Sk4f(0.5f)).store(&c);
// p4 is RGBA, but we want BGRA, so we need to swap next
return SkSwizzle_RB(c);
}
default:
SkDEBUGFAIL("");
return SkColorSetARGB(0, 0, 0, 0);
}
}