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#include "SkBitmapSampler.h"
static SkTileModeProc get_tilemode_proc(SkShader::TileMode mode)
{
switch (mode) {
case SkShader::kClamp_TileMode:
return do_clamp;
case SkShader::kRepeat_TileMode:
return do_repeat_mod;
case SkShader::kMirror_TileMode:
return do_mirror_mod;
default:
SkASSERT(!"unknown mode");
return NULL;
}
}
SkBitmapSampler::SkBitmapSampler(const SkBitmap& bm, SkPaint::FilterType ftype,
SkShader::TileMode tmx, SkShader::TileMode tmy)
: fBitmap(bm), fFilterType(ftype), fTileModeX(tmx), fTileModeY(tmy)
{
SkASSERT(bm.width() > 0 && bm.height() > 0);
fMaxX = SkToU16(bm.width() - 1);
fMaxY = SkToU16(bm.height() - 1);
fTileProcX = get_tilemode_proc(tmx);
fTileProcY = get_tilemode_proc(tmy);
}
class SkNullBitmapSampler : public SkBitmapSampler {
public:
SkNullBitmapSampler(const SkBitmap& bm, SkPaint::FilterType ft,
SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, ft, tmx, tmy) {}
virtual SkPMColor sample(SkFixed x, SkFixed y) const { return 0; }
};
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////
#define BITMAP_CLASSNAME_PREFIX(name) ARGB32##name
#define BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y) *bitmap.getAddr32(x, y)
#include "SkBitmapSamplerTemplate.h"
#include "SkColorPriv.h"
#define BITMAP_CLASSNAME_PREFIX(name) RGB16##name
#define BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y) SkPixel16ToPixel32(*bitmap.getAddr16(x, y))
#include "SkBitmapSamplerTemplate.h"
#define BITMAP_CLASSNAME_PREFIX(name) Index8##name
#define BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y) bitmap.getIndex8Color(x, y)
#include "SkBitmapSamplerTemplate.h"
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////
///////////////// The Bilinear versions
static void assert_valid_pmcolor(uint32_t c)
{
SkASSERT(SkGetPackedA32(c) >= SkGetPackedR32(c));
SkASSERT(SkGetPackedA32(c) >= SkGetPackedG32(c));
SkASSERT(SkGetPackedA32(c) >= SkGetPackedB32(c));
}
#include "SkFilterProc.h"
class ARGB32_Bilinear_Sampler : public SkBitmapSampler {
public:
ARGB32_Bilinear_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, SkPaint::kBilinear_FilterType, tmx, tmy)
{
fProcTable = SkGetBilinearFilterProcTable();
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
int ix = x >> 16;
int iy = y >> 16;
ix = fTileProcX(ix, fMaxX);
iy = fTileProcY(iy, fMaxY);
const uint32_t *p00, *p01, *p10, *p11;
p00 = p01 = fBitmap.getAddr32(ix, iy);
if (ix < fMaxX)
p01 += 1;
p10 = p00;
p11 = p01;
if (iy < fMaxY)
{
p10 = (const uint32_t*)((const char*)p10 + fBitmap.rowBytes());
p11 = (const uint32_t*)((const char*)p11 + fBitmap.rowBytes());
}
uint32_t c00 = *p00;
uint32_t c01 = *p01;
uint32_t c10 = *p10;
uint32_t c11 = *p11;
assert_valid_pmcolor(c00);
assert_valid_pmcolor(c01);
assert_valid_pmcolor(c01);
assert_valid_pmcolor(c11);
SkFilterProc proc = SkGetBilinearFilterProc(fProcTable, x, y);
uint32_t c = SkPackARGB32( proc(SkGetPackedA32(c00), SkGetPackedA32(c01), SkGetPackedA32(c10), SkGetPackedA32(c11)),
proc(SkGetPackedR32(c00), SkGetPackedR32(c01), SkGetPackedR32(c10), SkGetPackedR32(c11)),
proc(SkGetPackedG32(c00), SkGetPackedG32(c01), SkGetPackedG32(c10), SkGetPackedG32(c11)),
proc(SkGetPackedB32(c00), SkGetPackedB32(c01), SkGetPackedB32(c10), SkGetPackedB32(c11)));
assert_valid_pmcolor(c);
return c;
}
private:
const SkFilterProc* fProcTable;
};
class Index8_Bilinear_Sampler : public SkBitmapSampler {
public:
Index8_Bilinear_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, SkPaint::kBilinear_FilterType, tmx, tmy)
{
fProcTable = SkGetBilinearFilterProcTable();
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
int ix = x >> 16;
int iy = y >> 16;
ix = fTileProcX(ix, fMaxX);
iy = fTileProcY(iy, fMaxY);
const U8 *p00, *p01, *p10, *p11;
p00 = p01 = fBitmap.getAddr8(ix, iy);
if (ix < fMaxX)
p01 += 1;
p10 = p00;
p11 = p01;
if (iy < fMaxY)
{
p10 = (const U8*)((const char*)p10 + fBitmap.rowBytes());
p11 = (const U8*)((const char*)p11 + fBitmap.rowBytes());
}
const SkPMColor* colors = fBitmap.getColorTable()->lockColors();
uint32_t c00 = colors[*p00];
uint32_t c01 = colors[*p01];
uint32_t c10 = colors[*p10];
uint32_t c11 = colors[*p11];
assert_valid_pmcolor(c00);
assert_valid_pmcolor(c01);
assert_valid_pmcolor(c01);
assert_valid_pmcolor(c11);
SkFilterProc proc = SkGetBilinearFilterProc(fProcTable, x, y);
uint32_t c = SkPackARGB32( proc(SkGetPackedA32(c00), SkGetPackedA32(c01), SkGetPackedA32(c10), SkGetPackedA32(c11)),
proc(SkGetPackedR32(c00), SkGetPackedR32(c01), SkGetPackedR32(c10), SkGetPackedR32(c11)),
proc(SkGetPackedG32(c00), SkGetPackedG32(c01), SkGetPackedG32(c10), SkGetPackedG32(c11)),
proc(SkGetPackedB32(c00), SkGetPackedB32(c01), SkGetPackedB32(c10), SkGetPackedB32(c11)));
assert_valid_pmcolor(c);
fBitmap.getColorTable()->unlockColors(false);
return c;
}
private:
const SkFilterProc* fProcTable;
};
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////
SkBitmapSampler* SkBitmapSampler::Create(const SkBitmap& bm, SkPaint::FilterType ftype,
SkShader::TileMode tmx, SkShader::TileMode tmy)
{
switch (bm.getConfig()) {
case SkBitmap::kARGB_8888_Config:
switch (ftype) {
case SkPaint::kNo_FilterType:
if (tmx == tmy) {
switch (tmx) {
case SkShader::kClamp_TileMode:
return SkNEW_ARGS(ARGB32_Point_Clamp_Sampler, (bm));
case SkShader::kRepeat_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(ARGB32_Point_Repeat_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(ARGB32_Point_Repeat_Mod_Sampler, (bm));
case SkShader::kMirror_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(ARGB32_Point_Mirror_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(ARGB32_Point_Mirror_Mod_Sampler, (bm));
default:
SkASSERT(!"unknown mode");
}
}
else { // tmx != tmy
return SkNEW_ARGS(ARGB32_Point_Sampler, (bm, tmx, tmy));
}
break;
case SkPaint::kBilinear_FilterType:
return SkNEW_ARGS(ARGB32_Bilinear_Sampler, (bm, tmx, tmy));
default:
SkASSERT(!"unknown filter type");
}
break;
case SkBitmap::kRGB_565_Config:
// we ignore ftype, since we haven't implemented bilinear for 16bit bitmaps yet
if (tmx == tmy) {
switch (tmx) {
case SkShader::kClamp_TileMode:
return SkNEW_ARGS(RGB16_Point_Clamp_Sampler, (bm));
case SkShader::kRepeat_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(RGB16_Point_Repeat_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(RGB16_Point_Repeat_Mod_Sampler, (bm));
case SkShader::kMirror_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(RGB16_Point_Mirror_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(RGB16_Point_Mirror_Mod_Sampler, (bm));
default:
SkASSERT(!"unknown mode");
}
}
else { // tmx != tmy
return SkNEW_ARGS(RGB16_Point_Sampler, (bm, tmx, tmy));
}
break;
case SkBitmap::kIndex8_Config:
switch (ftype) {
case SkPaint::kNo_FilterType:
if (tmx == tmy) {
switch (tmx) {
case SkShader::kClamp_TileMode:
return SkNEW_ARGS(Index8_Point_Clamp_Sampler, (bm));
case SkShader::kRepeat_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(Index8_Point_Repeat_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(Index8_Point_Repeat_Mod_Sampler, (bm));
case SkShader::kMirror_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(Index8_Point_Mirror_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(Index8_Point_Mirror_Mod_Sampler, (bm));
default:
SkASSERT(!"unknown mode");
}
}
else { // tmx != tmy
return SkNEW_ARGS(Index8_Point_Sampler, (bm, tmx, tmy));
}
break;
case SkPaint::kBilinear_FilterType:
return SkNEW_ARGS(Index8_Bilinear_Sampler, (bm, tmx, tmy));
default: // to avoid warnings
break;
}
break;
default:
SkASSERT(!"unknown device");
}
return SkNEW_ARGS(SkNullBitmapSampler, (bm, ftype, tmx, tmy));
}
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