blob: bb72b82628e08ccad5b309bf4f406d0da19a307a [file] [log] [blame]
#include "SkBitmap.h"
#include "SkTableColorFilter.h"
#include "SkColorPriv.h"
#include "SkFlattenableBuffers.h"
#include "SkUnPreMultiply.h"
#include "SkString.h"
class SkTable_ColorFilter : public SkColorFilter {
public:
SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[],
const uint8_t tableG[], const uint8_t tableB[]) {
fBitmap = NULL;
fFlags = 0;
uint8_t* dst = fStorage;
if (tableA) {
memcpy(dst, tableA, 256);
dst += 256;
fFlags |= kA_Flag;
}
if (tableR) {
memcpy(dst, tableR, 256);
dst += 256;
fFlags |= kR_Flag;
}
if (tableG) {
memcpy(dst, tableG, 256);
dst += 256;
fFlags |= kG_Flag;
}
if (tableB) {
memcpy(dst, tableB, 256);
fFlags |= kB_Flag;
}
}
virtual ~SkTable_ColorFilter() {
SkDELETE(fBitmap);
}
virtual bool asComponentTable(SkBitmap* table) const SK_OVERRIDE;
#if SK_SUPPORT_GPU
virtual GrEffectRef* asNewEffect(GrContext* context) const SK_OVERRIDE;
#endif
virtual void filterSpan(const SkPMColor src[], int count,
SkPMColor dst[]) const SK_OVERRIDE;
SkDEVCODE(virtual void toString(SkString* str) const SK_OVERRIDE;)
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTable_ColorFilter)
enum {
kA_Flag = 1 << 0,
kR_Flag = 1 << 1,
kG_Flag = 1 << 2,
kB_Flag = 1 << 3,
};
protected:
SkTable_ColorFilter(SkFlattenableReadBuffer& buffer);
virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
private:
mutable const SkBitmap* fBitmap; // lazily allocated
uint8_t fStorage[256 * 4];
unsigned fFlags;
typedef SkColorFilter INHERITED;
};
static const uint8_t gIdentityTable[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
};
void SkTable_ColorFilter::filterSpan(const SkPMColor src[], int count,
SkPMColor dst[]) const {
const uint8_t* table = fStorage;
const uint8_t* tableA = gIdentityTable;
const uint8_t* tableR = gIdentityTable;
const uint8_t* tableG = gIdentityTable;
const uint8_t* tableB = gIdentityTable;
if (fFlags & kA_Flag) {
tableA = table; table += 256;
}
if (fFlags & kR_Flag) {
tableR = table; table += 256;
}
if (fFlags & kG_Flag) {
tableG = table; table += 256;
}
if (fFlags & kB_Flag) {
tableB = table;
}
const SkUnPreMultiply::Scale* scaleTable = SkUnPreMultiply::GetScaleTable();
for (int i = 0; i < count; ++i) {
SkPMColor c = src[i];
unsigned a, r, g, b;
if (0 == c) {
a = r = g = b = 0;
} else {
a = SkGetPackedA32(c);
r = SkGetPackedR32(c);
g = SkGetPackedG32(c);
b = SkGetPackedB32(c);
if (a < 255) {
SkUnPreMultiply::Scale scale = scaleTable[a];
r = SkUnPreMultiply::ApplyScale(scale, r);
g = SkUnPreMultiply::ApplyScale(scale, g);
b = SkUnPreMultiply::ApplyScale(scale, b);
}
}
dst[i] = SkPremultiplyARGBInline(tableA[a], tableR[r],
tableG[g], tableB[b]);
}
}
#ifdef SK_DEVELOPER
void SkTable_ColorFilter::toString(SkString* str) const {
str->append("SkTable_ColorFilter");
}
#endif
static const uint8_t gCountNibBits[] = {
0, 1, 1, 2,
1, 2, 2, 3,
1, 2, 2, 3,
2, 3, 3, 4
};
#include "SkPackBits.h"
void SkTable_ColorFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
uint8_t storage[5*256];
int count = gCountNibBits[fFlags & 0xF];
size_t size = SkPackBits::Pack8(fStorage, count * 256, storage);
SkASSERT(size <= sizeof(storage));
// SkDebugf("raw %d packed %d\n", count * 256, size);
buffer.writeInt(fFlags);
buffer.writeByteArray(storage, size);
}
SkTable_ColorFilter::SkTable_ColorFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
fBitmap = NULL;
uint8_t storage[5*256];
fFlags = buffer.readInt();
size_t size = buffer.getArrayCount();
SkASSERT(size <= sizeof(storage));
buffer.readByteArray(storage);
SkDEBUGCODE(size_t raw = ) SkPackBits::Unpack8(storage, size, fStorage);
SkASSERT(raw <= sizeof(fStorage));
SkDEBUGCODE(size_t count = gCountNibBits[fFlags & 0xF]);
SkASSERT(raw == count * 256);
}
bool SkTable_ColorFilter::asComponentTable(SkBitmap* table) const {
if (table) {
if (NULL == fBitmap) {
SkBitmap* bmp = SkNEW(SkBitmap);
bmp->setConfig(SkBitmap::kA8_Config, 256, 4, 256);
bmp->allocPixels();
uint8_t* bitmapPixels = bmp->getAddr8(0, 0);
int offset = 0;
static const unsigned kFlags[] = { kA_Flag, kR_Flag, kG_Flag, kB_Flag };
for (int x = 0; x < 4; ++x) {
if (!(fFlags & kFlags[x])) {
memcpy(bitmapPixels, gIdentityTable, sizeof(gIdentityTable));
} else {
memcpy(bitmapPixels, fStorage + offset, 256);
offset += 256;
}
bitmapPixels += 256;
}
fBitmap = bmp;
}
*table = *fBitmap;
}
return true;
}
#if SK_SUPPORT_GPU
#include "GrEffect.h"
#include "GrTBackendEffectFactory.h"
#include "gl/GrGLEffect.h"
#include "SkGr.h"
class GLColorTableEffect;
class ColorTableEffect : public GrEffect {
public:
static GrEffectRef* Create(GrTexture* texture, unsigned flags) {
AutoEffectUnref effect(SkNEW_ARGS(ColorTableEffect, (texture, flags)));
return CreateEffectRef(effect);
}
virtual ~ColorTableEffect();
static const char* Name() { return "ColorTable"; }
virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
typedef GLColorTableEffect GLEffect;
private:
virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
explicit ColorTableEffect(GrTexture* texture, unsigned flags);
GR_DECLARE_EFFECT_TEST;
GrTextureAccess fTextureAccess;
unsigned fFlags; // currently not used in shader code, just to assist
// getConstantColorComponents().
typedef GrEffect INHERITED;
};
class GLColorTableEffect : public GrGLEffect {
public:
GLColorTableEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
virtual void emitCode(GrGLShaderBuilder*,
const GrDrawEffect&,
EffectKey,
const char* outputColor,
const char* inputColor,
const TextureSamplerArray&) SK_OVERRIDE;
virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE {}
static EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
private:
typedef GrGLEffect INHERITED;
};
GLColorTableEffect::GLColorTableEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
: INHERITED(factory) {
}
void GLColorTableEffect::emitCode(GrGLShaderBuilder* builder,
const GrDrawEffect&,
EffectKey,
const char* outputColor,
const char* inputColor,
const TextureSamplerArray& samplers) {
static const float kColorScaleFactor = 255.0f / 256.0f;
static const float kColorOffsetFactor = 1.0f / 512.0f;
if (NULL == inputColor) {
// the input color is solid white (all ones).
static const float kMaxValue = kColorScaleFactor + kColorOffsetFactor;
builder->fsCodeAppendf("\t\tvec4 coord = vec4(%f, %f, %f, %f);\n",
kMaxValue, kMaxValue, kMaxValue, kMaxValue);
} else {
builder->fsCodeAppendf("\t\tfloat nonZeroAlpha = max(%s.a, .0001);\n", inputColor);
builder->fsCodeAppendf("\t\tvec4 coord = vec4(%s.rgb / nonZeroAlpha, nonZeroAlpha);\n", inputColor);
builder->fsCodeAppendf("\t\tcoord = coord * %f + vec4(%f, %f, %f, %f);\n",
kColorScaleFactor,
kColorOffsetFactor, kColorOffsetFactor,
kColorOffsetFactor, kColorOffsetFactor);
}
builder->fsCodeAppendf("\t\t%s.a = ", outputColor);
builder->fsAppendTextureLookup(samplers[0], "vec2(coord.a, 0.125)");
builder->fsCodeAppend(";\n");
builder->fsCodeAppendf("\t\t%s.r = ", outputColor);
builder->fsAppendTextureLookup(samplers[0], "vec2(coord.r, 0.375)");
builder->fsCodeAppend(";\n");
builder->fsCodeAppendf("\t\t%s.g = ", outputColor);
builder->fsAppendTextureLookup(samplers[0], "vec2(coord.g, 0.625)");
builder->fsCodeAppend(";\n");
builder->fsCodeAppendf("\t\t%s.b = ", outputColor);
builder->fsAppendTextureLookup(samplers[0], "vec2(coord.b, 0.875)");
builder->fsCodeAppend(";\n");
builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor);
}
GrGLEffect::EffectKey GLColorTableEffect::GenKey(const GrDrawEffect&, const GrGLCaps&) {
return 0;
}
///////////////////////////////////////////////////////////////////////////////
ColorTableEffect::ColorTableEffect(GrTexture* texture, unsigned flags)
: fTextureAccess(texture, "a")
, fFlags(flags) {
this->addTextureAccess(&fTextureAccess);
}
ColorTableEffect::~ColorTableEffect() {
}
const GrBackendEffectFactory& ColorTableEffect::getFactory() const {
return GrTBackendEffectFactory<ColorTableEffect>::getInstance();
}
bool ColorTableEffect::onIsEqual(const GrEffect& sBase) const {
return this->texture(0) == sBase.texture(0);
}
void ColorTableEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
// If we kept the table in the effect then we could actually run known inputs through the
// table.
if (fFlags & SkTable_ColorFilter::kR_Flag) {
*validFlags &= ~kR_GrColorComponentFlag;
}
if (fFlags & SkTable_ColorFilter::kG_Flag) {
*validFlags &= ~kG_GrColorComponentFlag;
}
if (fFlags & SkTable_ColorFilter::kB_Flag) {
*validFlags &= ~kB_GrColorComponentFlag;
}
if (fFlags & SkTable_ColorFilter::kA_Flag) {
*validFlags &= ~kA_GrColorComponentFlag;
}
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_EFFECT_TEST(ColorTableEffect);
GrEffectRef* ColorTableEffect::TestCreate(SkMWCRandom* random,
GrContext* context,
const GrDrawTargetCaps&,
GrTexture* textures[]) {
static unsigned kAllFlags = SkTable_ColorFilter::kR_Flag | SkTable_ColorFilter::kG_Flag |
SkTable_ColorFilter::kB_Flag | SkTable_ColorFilter::kA_Flag;
return ColorTableEffect::Create(textures[GrEffectUnitTest::kAlphaTextureIdx], kAllFlags);
}
GrEffectRef* SkTable_ColorFilter::asNewEffect(GrContext* context) const {
SkBitmap bitmap;
GrEffectRef* effect = NULL;
this->asComponentTable(&bitmap);
// passing NULL because this effect does no tiling or filtering.
GrTexture* texture = GrLockAndRefCachedBitmapTexture(context, bitmap, NULL);
if (NULL != texture) {
effect = ColorTableEffect::Create(texture, fFlags);
// Unlock immediately, this is not great, but we don't have a way of
// knowing when else to unlock it currently. TODO: Remove this when
// unref becomes the unlock replacement for all types of textures.
GrUnlockAndUnrefCachedBitmapTexture(texture);
}
return effect;
}
#endif // SK_SUPPORT_GPU
///////////////////////////////////////////////////////////////////////////////
#ifdef SK_CPU_BENDIAN
#else
#define SK_A32_INDEX (3 - (SK_A32_SHIFT >> 3))
#define SK_R32_INDEX (3 - (SK_R32_SHIFT >> 3))
#define SK_G32_INDEX (3 - (SK_G32_SHIFT >> 3))
#define SK_B32_INDEX (3 - (SK_B32_SHIFT >> 3))
#endif
///////////////////////////////////////////////////////////////////////////////
SkColorFilter* SkTableColorFilter::Create(const uint8_t table[256]) {
return SkNEW_ARGS(SkTable_ColorFilter, (table, table, table, table));
}
SkColorFilter* SkTableColorFilter::CreateARGB(const uint8_t tableA[256],
const uint8_t tableR[256],
const uint8_t tableG[256],
const uint8_t tableB[256]) {
return SkNEW_ARGS(SkTable_ColorFilter, (tableA, tableR, tableG, tableB));
}
SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkTableColorFilter)
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTable_ColorFilter)
SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END