| /* |
| * Copyright 2013 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 SF_RENDER_ENGINE_PROGRAMCACHE_H |
| #define SF_RENDER_ENGINE_PROGRAMCACHE_H |
| |
| #include <GLES2/gl2.h> |
| |
| #include <utils/Singleton.h> |
| #include <utils/KeyedVector.h> |
| #include <utils/TypeHelpers.h> |
| |
| #include "Description.h" |
| |
| namespace android { |
| |
| class Description; |
| class Program; |
| class String8; |
| |
| /* |
| * This class generates GLSL programs suitable to handle a given |
| * Description. It's responsible for figuring out what to |
| * generate from a Description. |
| * It also maintains a cache of these Programs. |
| */ |
| class ProgramCache : public Singleton<ProgramCache> { |
| public: |
| /* |
| * Key is used to retrieve a Program in the cache. |
| * A Key is generated from a Description. |
| */ |
| class Key { |
| friend class ProgramCache; |
| typedef uint32_t key_t; |
| key_t mKey; |
| public: |
| enum { |
| BLEND_PREMULT = 0x00000001, |
| BLEND_NORMAL = 0x00000000, |
| BLEND_MASK = 0x00000001, |
| |
| OPACITY_OPAQUE = 0x00000002, |
| OPACITY_TRANSLUCENT = 0x00000000, |
| OPACITY_MASK = 0x00000002, |
| |
| PLANE_ALPHA_LT_ONE = 0x00000004, |
| PLANE_ALPHA_EQ_ONE = 0x00000000, |
| PLANE_ALPHA_MASK = 0x00000004, |
| |
| TEXTURE_OFF = 0x00000000, |
| TEXTURE_EXT = 0x00000008, |
| TEXTURE_2D = 0x00000010, |
| TEXTURE_MASK = 0x00000018, |
| |
| COLOR_MATRIX_OFF = 0x00000000, |
| COLOR_MATRIX_ON = 0x00000020, |
| COLOR_MATRIX_MASK = 0x00000020, |
| |
| WIDE_GAMUT_OFF = 0x00000000, |
| WIDE_GAMUT_ON = 0x00000040, |
| WIDE_GAMUT_MASK = 0x00000040, |
| }; |
| |
| inline Key() : mKey(0) { } |
| inline Key(const Key& rhs) : mKey(rhs.mKey) { } |
| |
| inline Key& set(key_t mask, key_t value) { |
| mKey = (mKey & ~mask) | value; |
| return *this; |
| } |
| |
| inline bool isTexturing() const { |
| return (mKey & TEXTURE_MASK) != TEXTURE_OFF; |
| } |
| inline int getTextureTarget() const { |
| return (mKey & TEXTURE_MASK); |
| } |
| inline bool isPremultiplied() const { |
| return (mKey & BLEND_MASK) == BLEND_PREMULT; |
| } |
| inline bool isOpaque() const { |
| return (mKey & OPACITY_MASK) == OPACITY_OPAQUE; |
| } |
| inline bool hasPlaneAlpha() const { |
| return (mKey & PLANE_ALPHA_MASK) == PLANE_ALPHA_LT_ONE; |
| } |
| inline bool hasColorMatrix() const { |
| return (mKey & COLOR_MATRIX_MASK) == COLOR_MATRIX_ON; |
| } |
| inline bool isWideGamut() const { |
| return (mKey & WIDE_GAMUT_MASK) == WIDE_GAMUT_ON; |
| } |
| |
| // this is the definition of a friend function -- not a method of class Needs |
| friend inline int strictly_order_type(const Key& lhs, const Key& rhs) { |
| return (lhs.mKey < rhs.mKey) ? 1 : 0; |
| } |
| }; |
| |
| ProgramCache(); |
| ~ProgramCache(); |
| |
| // useProgram lookup a suitable program in the cache or generates one |
| // if none can be found. |
| void useProgram(const Description& description); |
| |
| private: |
| // Generate shaders to populate the cache |
| void primeCache(); |
| // compute a cache Key from a Description |
| static Key computeKey(const Description& description); |
| // generates a program from the Key |
| static Program* generateProgram(const Key& needs); |
| // generates the vertex shader from the Key |
| static String8 generateVertexShader(const Key& needs); |
| // generates the fragment shader from the Key |
| static String8 generateFragmentShader(const Key& needs); |
| |
| // Key/Value map used for caching Programs. Currently the cache |
| // is never shrunk. |
| DefaultKeyedVector<Key, Program*> mCache; |
| }; |
| |
| |
| ANDROID_BASIC_TYPES_TRAITS(ProgramCache::Key) |
| |
| } /* namespace android */ |
| |
| #endif /* SF_RENDER_ENGINE_PROGRAMCACHE_H */ |