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remove SK_SUPPORT_LEGACY_MIPLEVEL_BUILDER code

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BUG=skia:
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Review URL: https://codereview.chromium.org/1599133002
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reed 2016-01-17 14:16:12 -08:00 committed by Commit bot
parent ce2ae8a47e
commit ab11c3f14c
1 changed files with 0 additions and 301 deletions
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301
src/core/SkMipMap.cpp
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@ -9,306 +9,6 @@
#include "SkBitmap.h"
#include "SkColorPriv.h"
#ifdef SK_SUPPORT_LEGACY_MIPLEVEL_BUILDER
static void downsample32_nocheck(void* dst, int, int, const void* srcPtr, const SkPixmap& srcPM) {
const uint32_t* p = static_cast<const uint32_t*>(srcPtr);
const uint32_t* baseP = p;
uint32_t c, ag, rb;
c = *p; ag = (c >> 8) & 0xFF00FF; rb = c & 0xFF00FF;
p += 1;
c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF;
p = baseP;
p += srcPM.rowBytes() >> 2;
c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF;
p += 1;
c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF;
*(uint32_t*)dst = ((rb >> 2) & 0xFF00FF) | ((ag << 6) & 0xFF00FF00);
}
static void downsample32_check(void* dst, int x, int y, const void* srcPtr, const SkPixmap& srcPM) {
const uint32_t* p = static_cast<const uint32_t*>(srcPtr);
const uint32_t* baseP = p;
x <<= 1;
y <<= 1;
SkASSERT(srcPM.addr32(x, y) == p);
SkPMColor c, ag, rb;
c = *p; ag = (c >> 8) & 0xFF00FF; rb = c & 0xFF00FF;
if (x < srcPM.width() - 1) {
p += 1;
}
c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF;
p = baseP;
if (y < srcPM.height() - 1) {
p += srcPM.rowBytes() >> 2;
}
c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF;
if (x < srcPM.width() - 1) {
p += 1;
}
c = *p; ag += (c >> 8) & 0xFF00FF; rb += c & 0xFF00FF;
*((uint32_t*)dst) = ((rb >> 2) & 0xFF00FF) | ((ag << 6) & 0xFF00FF00);
}
static inline uint32_t expand16(U16CPU c) {
return (c & ~SK_G16_MASK_IN_PLACE) | ((c & SK_G16_MASK_IN_PLACE) << 16);
}
// returns dirt in the top 16bits, but we don't care, since we only
// store the low 16bits.
static inline U16CPU pack16(uint32_t c) {
return (c & ~SK_G16_MASK_IN_PLACE) | ((c >> 16) & SK_G16_MASK_IN_PLACE);
}
static void downsample16(void* dst, int x, int y, const void* srcPtr, const SkPixmap& srcPM) {
const uint16_t* p = static_cast<const uint16_t*>(srcPtr);
const uint16_t* baseP = p;
x <<= 1;
y <<= 1;
SkASSERT(srcPM.addr16(x, y) == p);
SkPMColor c;
c = expand16(*p);
if (x < srcPM.width() - 1) {
p += 1;
}
c += expand16(*p);
p = baseP;
if (y < srcPM.height() - 1) {
p += srcPM.rowBytes() >> 1;
}
c += expand16(*p);
if (x < srcPM.width() - 1) {
p += 1;
}
c += expand16(*p);
*((uint16_t*)dst) = (uint16_t)pack16(c >> 2);
}
static uint32_t expand4444(U16CPU c) {
return (c & 0xF0F) | ((c & ~0xF0F) << 12);
}
static U16CPU collaps4444(uint32_t c) {
return (c & 0xF0F) | ((c >> 12) & ~0xF0F);
}
static void downsample4444(void* dst, int x, int y, const void* srcPtr, const SkPixmap& srcPM) {
const uint16_t* p = static_cast<const uint16_t*>(srcPtr);
const uint16_t* baseP = p;
x <<= 1;
y <<= 1;
SkASSERT(srcPM.addr16(x, y) == p);
uint32_t c;
c = expand4444(*p);
if (x < srcPM.width() - 1) {
p += 1;
}
c += expand4444(*p);
p = baseP;
if (y < srcPM.height() - 1) {
p += srcPM.rowBytes() >> 1;
}
c += expand4444(*p);
if (x < srcPM.width() - 1) {
p += 1;
}
c += expand4444(*p);
*((uint16_t*)dst) = (uint16_t)collaps4444(c >> 2);
}
static void downsample8_nocheck(void* dst, int, int, const void* srcPtr, const SkPixmap& srcPM) {
const size_t rb = srcPM.rowBytes();
const uint8_t* p = static_cast<const uint8_t*>(srcPtr);
*(uint8_t*)dst = (p[0] + p[1] + p[rb] + p[rb + 1]) >> 2;
}
static void downsample8_check(void* dst, int x, int y, const void* srcPtr, const SkPixmap& srcPM) {
const uint8_t* p = static_cast<const uint8_t*>(srcPtr);
const uint8_t* baseP = p;
x <<= 1;
y <<= 1;
SkASSERT(srcPM.addr8(x, y) == p);
unsigned c = *p;
if (x < srcPM.width() - 1) {
p += 1;
}
c += *p;
p = baseP;
if (y < srcPM.height() - 1) {
p += srcPM.rowBytes();
}
c += *p;
if (x < srcPM.width() - 1) {
p += 1;
}
c += *p;
*(uint8_t*)dst = c >> 2;
}
size_t SkMipMap::AllocLevelsSize(int levelCount, size_t pixelSize) {
if (levelCount < 0) {
return 0;
}
int64_t size = sk_64_mul(levelCount + 1, sizeof(Level)) + pixelSize;
if (!sk_64_isS32(size)) {
return 0;
}
return sk_64_asS32(size);
}
typedef void SkDownSampleProc(void*, int x, int y, const void* srcPtr, const SkPixmap& srcPM);
SkMipMap* SkMipMap::Build(const SkPixmap& src, SkDiscardableFactoryProc fact) {
SkDownSampleProc* proc_nocheck, *proc_check;
const SkColorType ct = src.colorType();
const SkAlphaType at = src.alphaType();
switch (ct) {
case kRGBA_8888_SkColorType:
case kBGRA_8888_SkColorType:
proc_check = downsample32_check;
proc_nocheck = downsample32_nocheck;
break;
case kRGB_565_SkColorType:
proc_check = downsample16;
proc_nocheck = proc_check;
break;
case kARGB_4444_SkColorType:
proc_check = downsample4444;
proc_nocheck = proc_check;
break;
case kAlpha_8_SkColorType:
case kGray_8_SkColorType:
proc_check = downsample8_check;
proc_nocheck = downsample8_nocheck;
break;
default:
return nullptr; // don't build mipmaps for any other colortypes (yet)
}
// whip through our loop to compute the exact size needed
size_t size = 0;
int countLevels = 0;
{
int width = src.width();
int height = src.height();
for (;;) {
width >>= 1;
height >>= 1;
if (0 == width || 0 == height) {
break;
}
size += SkColorTypeMinRowBytes(ct, width) * height;
countLevels += 1;
}
}
if (0 == countLevels) {
return nullptr;
}
size_t storageSize = SkMipMap::AllocLevelsSize(countLevels, size);
if (0 == storageSize) {
return nullptr;
}
SkMipMap* mipmap;
if (fact) {
SkDiscardableMemory* dm = fact(storageSize);
if (nullptr == dm) {
return nullptr;
}
mipmap = new SkMipMap(storageSize, dm);
} else {
mipmap = new SkMipMap(sk_malloc_throw(storageSize), storageSize);
}
// init
mipmap->fCount = countLevels;
mipmap->fLevels = (Level*)mipmap->writable_data();
Level* levels = mipmap->fLevels;
uint8_t* baseAddr = (uint8_t*)&levels[countLevels];
uint8_t* addr = baseAddr;
int width = src.width();
int height = src.height();
uint32_t rowBytes;
SkPixmap srcPM(src);
for (int i = 0; i < countLevels; ++i) {
width >>= 1;
height >>= 1;
rowBytes = SkToU32(SkColorTypeMinRowBytes(ct, width));
levels[i].fPixmap = SkPixmap(SkImageInfo::Make(width, height, ct, at), addr, rowBytes);
levels[i].fScale = (float)width / src.width();
SkPixmap dstPM(SkImageInfo::Make(width, height, ct, at), addr, rowBytes);
const int widthEven = width & ~1;
const int heightEven = height & ~1;
const size_t pixelSize = srcPM.info().bytesPerPixel();
const void* srcBasePtr = srcPM.addr();
void* dstBasePtr = dstPM.writable_addr();
for (int y = 0; y < heightEven; y++) {
const void* srcPtr = srcBasePtr;
void* dstPtr = dstBasePtr;
for (int x = 0; x < widthEven; x++) {
proc_nocheck(dstPtr, x, y, srcPtr, srcPM);
srcPtr = (char*)srcPtr + pixelSize * 2;
dstPtr = (char*)dstPtr + pixelSize;
}
if (width & 1) {
proc_check(dstPtr, widthEven, y, srcPtr, srcPM);
}
srcBasePtr = (char*)srcBasePtr + srcPM.rowBytes() * 2;
dstBasePtr = (char*)dstBasePtr + dstPM.rowBytes();
}
if (height & 1) {
const void* srcPtr = srcBasePtr;
void* dstPtr = dstBasePtr;
for (int x = 0; x < width; x++) {
proc_check(dstPtr, x, heightEven, srcPtr, srcPM);
srcPtr = (char*)srcPtr + pixelSize * 2;
dstPtr = (char*)dstPtr + pixelSize;
}
}
srcPM = dstPM;
addr += height * rowBytes;
}
SkASSERT(addr == baseAddr + size);
return mipmap;
}
#else // new technique that handles odd dimensions better
//
// ColorTypeFilter is the "Type" we pass to some downsample template functions.
// It controls how we expand a pixel into a large type, with space between each component,
@ -604,7 +304,6 @@ SkMipMap* SkMipMap::Build(const SkPixmap& src, SkDiscardableFactoryProc fact) {
return mipmap;
}
#endif
///////////////////////////////////////////////////////////////////////////////