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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_UI_PROGRAM_CACHE_H
#define ANDROID_UI_PROGRAM_CACHE_H
#include <utils/KeyedVector.h>
#include <utils/Log.h>
#include <SkXfermode.h>
#include "Program.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
// Debug
#define DEBUG_PROGRAM_CACHE 0
// Debug
#if DEBUG_PROGRAM_CACHE
#define PROGRAM_LOGD(...) LOGD(__VA_ARGS__)
#else
#define PROGRAM_LOGD(...)
#endif
#define PROGRAM_KEY_TEXTURE 0x1
#define PROGRAM_KEY_A8_TEXTURE 0x2
#define PROGRAM_KEY_BITMAP 0x4
#define PROGRAM_KEY_GRADIENT 0x8
#define PROGRAM_KEY_BITMAP_FIRST 0x10
#define PROGRAM_KEY_COLOR_MATRIX 0x20
#define PROGRAM_KEY_COLOR_LIGHTING 0x40
#define PROGRAM_KEY_COLOR_BLEND 0x80
// Support only the 12 Porter-Duff modes for now
#define PROGRAM_MAX_XFERMODE 0xC
#define PROGRAM_XFERMODE_SHADER_SHIFT 24
#define PROGRAM_XFERMODE_COLOR_OP_SHIFT 20
///////////////////////////////////////////////////////////////////////////////
// Types
///////////////////////////////////////////////////////////////////////////////
typedef uint32_t programid;
///////////////////////////////////////////////////////////////////////////////
// Cache
///////////////////////////////////////////////////////////////////////////////
/**
* Describe the features required for a given program. The features
* determine the generation of both the vertex and fragment shaders.
* A ProgramDescription must be used in conjunction with a ProgramCache.
*/
struct ProgramDescription {
enum ColorModifier {
kColorNone,
kColorMatrix,
kColorLighting,
kColorBlend
};
ProgramDescription():
hasTexture(false), hasAlpha8Texture(false),
hasBitmap(false), hasGradient(false), shadersMode(SkXfermode::kClear_Mode),
colorOp(kColorNone), colorMode(SkXfermode::kClear_Mode) {
}
// Texturing
bool hasTexture;
bool hasAlpha8Texture;
// Shaders
bool hasBitmap;
bool hasGradient;
SkXfermode::Mode shadersMode;
bool isBitmapFirst;
// Color operations
int colorOp;
SkXfermode::Mode colorMode;
programid key() const {
programid key = 0;
if (hasTexture) key |= PROGRAM_KEY_TEXTURE;
if (hasAlpha8Texture) key |= PROGRAM_KEY_A8_TEXTURE;
if (hasBitmap) key |= PROGRAM_KEY_BITMAP;
if (hasGradient) key |= PROGRAM_KEY_GRADIENT;
if (isBitmapFirst) key |= PROGRAM_KEY_BITMAP_FIRST;
if (hasBitmap && hasGradient) {
key |= (shadersMode & PROGRAM_MAX_XFERMODE) << PROGRAM_XFERMODE_SHADER_SHIFT;
}
switch (colorOp) {
case kColorMatrix:
key |= PROGRAM_KEY_COLOR_MATRIX;
break;
case kColorLighting:
key |= PROGRAM_KEY_COLOR_LIGHTING;
break;
case kColorBlend:
key |= PROGRAM_KEY_COLOR_BLEND;
key |= (colorMode & PROGRAM_MAX_XFERMODE) << PROGRAM_XFERMODE_COLOR_OP_SHIFT;
break;
case kColorNone:
break;
}
return key;
}
}; // struct ProgramDescription
/**
* Generates and caches program. Programs are generated based on
* ProgramDescriptions.
*/
class ProgramCache {
public:
ProgramCache();
~ProgramCache();
Program* get(const ProgramDescription& description);
void clear();
private:
Program* generateProgram(const ProgramDescription& description, programid key);
String8 generateVertexShader(const ProgramDescription& description);
String8 generateFragmentShader(const ProgramDescription& description);
void generatePorterDuffBlend(String8& shader, const char* name, SkXfermode::Mode mode);
KeyedVector<programid, Program*> mCache;
}; // class ProgramCache
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_UI_PROGRAM_CACHE_H
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