Nicolas Capens | 0bac285 | 2016-05-07 06:09:58 -0400 | [diff] [blame] | 1 | // Copyright 2016 The SwiftShader Authors. All Rights Reserved. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | #ifndef sw_TextureStage_hpp |
| 16 | #define sw_TextureStage_hpp |
| 17 | |
| 18 | #include "Common/Types.hpp" |
| 19 | #include "Common/Math.hpp" |
| 20 | #include "Renderer/Color.hpp" |
| 21 | |
| 22 | namespace sw |
| 23 | { |
| 24 | class Sampler; |
| 25 | class PixelRoutine; |
| 26 | class Context; |
| 27 | |
| 28 | class TextureStage |
| 29 | { |
| 30 | friend class Context; // FIXME |
| 31 | |
| 32 | public: |
| 33 | enum StageOperation |
| 34 | { |
| 35 | STAGE_DISABLE, |
| 36 | STAGE_SELECTARG1, |
| 37 | STAGE_SELECTARG2, |
| 38 | STAGE_SELECTARG3, |
| 39 | STAGE_MODULATE, |
| 40 | STAGE_MODULATE2X, |
| 41 | STAGE_MODULATE4X, |
| 42 | STAGE_ADD, |
| 43 | STAGE_ADDSIGNED, |
| 44 | STAGE_ADDSIGNED2X, |
| 45 | STAGE_SUBTRACT, |
| 46 | STAGE_ADDSMOOTH, |
| 47 | STAGE_MULTIPLYADD, |
| 48 | STAGE_LERP, |
| 49 | STAGE_DOT3, |
| 50 | STAGE_BLENDCURRENTALPHA, |
| 51 | STAGE_BLENDDIFFUSEALPHA, |
| 52 | STAGE_BLENDFACTORALPHA, |
| 53 | STAGE_BLENDTEXTUREALPHA, |
| 54 | STAGE_BLENDTEXTUREALPHAPM, |
| 55 | STAGE_PREMODULATE, |
| 56 | STAGE_MODULATEALPHA_ADDCOLOR, |
| 57 | STAGE_MODULATECOLOR_ADDALPHA, |
| 58 | STAGE_MODULATEINVALPHA_ADDCOLOR, |
| 59 | STAGE_MODULATEINVCOLOR_ADDALPHA, |
| 60 | STAGE_BUMPENVMAP, |
| 61 | STAGE_BUMPENVMAPLUMINANCE, |
| 62 | |
| 63 | STAGE_LAST = STAGE_BUMPENVMAPLUMINANCE |
| 64 | }; |
| 65 | |
| 66 | enum SourceArgument |
| 67 | { |
| 68 | SOURCE_TEXTURE, |
| 69 | SOURCE_CONSTANT, |
| 70 | SOURCE_CURRENT, |
| 71 | SOURCE_DIFFUSE, |
| 72 | SOURCE_SPECULAR, |
| 73 | SOURCE_TEMP, |
| 74 | SOURCE_TFACTOR, |
| 75 | |
| 76 | SOURCE_LAST = SOURCE_TFACTOR |
| 77 | }; |
| 78 | |
| 79 | enum DestinationArgument |
| 80 | { |
| 81 | DESTINATION_CURRENT, |
| 82 | DESTINATION_TEMP, |
| 83 | |
| 84 | DESTINATION_LAST = DESTINATION_TEMP |
| 85 | }; |
| 86 | |
| 87 | enum ArgumentModifier |
| 88 | { |
| 89 | MODIFIER_COLOR, |
| 90 | MODIFIER_INVCOLOR, |
| 91 | MODIFIER_ALPHA, |
| 92 | MODIFIER_INVALPHA, |
| 93 | |
| 94 | MODIFIER_LAST = MODIFIER_INVALPHA |
| 95 | }; |
| 96 | |
| 97 | struct State |
| 98 | { |
| 99 | State(); |
| 100 | |
| 101 | unsigned int stageOperation : BITS(STAGE_LAST); |
| 102 | unsigned int firstArgument : BITS(SOURCE_LAST); |
| 103 | unsigned int secondArgument : BITS(SOURCE_LAST); |
| 104 | unsigned int thirdArgument : BITS(SOURCE_LAST); |
| 105 | unsigned int stageOperationAlpha : BITS(STAGE_LAST); |
| 106 | unsigned int firstArgumentAlpha : BITS(SOURCE_LAST); |
| 107 | unsigned int secondArgumentAlpha : BITS(SOURCE_LAST); |
| 108 | unsigned int thirdArgumentAlpha : BITS(SOURCE_LAST); |
| 109 | unsigned int firstModifier : BITS(MODIFIER_LAST); |
| 110 | unsigned int secondModifier : BITS(MODIFIER_LAST); |
| 111 | unsigned int thirdModifier : BITS(MODIFIER_LAST); |
| 112 | unsigned int firstModifierAlpha : BITS(MODIFIER_LAST); |
| 113 | unsigned int secondModifierAlpha : BITS(MODIFIER_LAST); |
| 114 | unsigned int thirdModifierAlpha : BITS(MODIFIER_LAST); |
| 115 | unsigned int destinationArgument : BITS(DESTINATION_LAST); |
| 116 | unsigned int texCoordIndex : BITS(7); |
| 117 | |
| 118 | unsigned int cantUnderflow : 1; |
| 119 | unsigned int usesTexture : 1; |
| 120 | }; |
| 121 | |
| 122 | struct Uniforms |
| 123 | { |
| 124 | word4 constantColor4[4]; |
| 125 | float4 bumpmapMatrix4F[2][2]; |
| 126 | word4 bumpmapMatrix4W[2][2]; |
| 127 | word4 luminanceScale4; |
| 128 | word4 luminanceOffset4; |
| 129 | }; |
| 130 | |
| 131 | TextureStage(); |
| 132 | |
| 133 | ~TextureStage(); |
| 134 | |
| 135 | void init(int stage, const Sampler *sampler, const TextureStage *previousStage); |
| 136 | |
| 137 | State textureStageState() const; |
| 138 | |
| 139 | void setConstantColor(const Color<float> &constantColor); |
| 140 | void setBumpmapMatrix(int element, float value); |
| 141 | void setLuminanceScale(float value); |
| 142 | void setLuminanceOffset(float value); |
| 143 | |
| 144 | void setTexCoordIndex(unsigned int texCoordIndex); |
| 145 | void setStageOperation(StageOperation stageOperation); |
| 146 | void setFirstArgument(SourceArgument firstArgument); |
| 147 | void setSecondArgument(SourceArgument secondArgument); |
| 148 | void setThirdArgument(SourceArgument thirdArgument); |
| 149 | void setStageOperationAlpha(StageOperation stageOperationAlpha); |
| 150 | void setFirstArgumentAlpha(SourceArgument firstArgumentAlpha); |
| 151 | void setSecondArgumentAlpha(SourceArgument secondArgumentAlpha); |
| 152 | void setThirdArgumentAlpha(SourceArgument thirdArgumentAlpha); |
| 153 | void setFirstModifier(ArgumentModifier firstModifier); |
| 154 | void setSecondModifier(ArgumentModifier secondModifier); |
| 155 | void setThirdModifier(ArgumentModifier thirdModifier); |
| 156 | void setFirstModifierAlpha(ArgumentModifier firstModifierAlpha); |
| 157 | void setSecondModifierAlpha(ArgumentModifier secondModifierAlpha); |
| 158 | void setThirdModifierAlpha(ArgumentModifier thirdModifierAlpha); |
| 159 | void setDestinationArgument(DestinationArgument destinationArgument); |
| 160 | |
| 161 | Uniforms uniforms; // FIXME: Private |
| 162 | |
| 163 | private: |
| 164 | bool usesColor(SourceArgument source) const; |
| 165 | bool usesAlpha(SourceArgument source) const; |
| 166 | bool uses(SourceArgument source) const; |
| 167 | bool usesCurrent() const; |
| 168 | bool usesDiffuse() const; |
| 169 | bool usesSpecular() const; |
| 170 | bool usesTexture() const; |
| 171 | bool isStageDisabled() const; |
| 172 | bool writesCurrent() const; |
| 173 | |
| 174 | int stage; |
| 175 | |
| 176 | StageOperation stageOperation; |
| 177 | SourceArgument firstArgument; |
| 178 | SourceArgument secondArgument; |
| 179 | SourceArgument thirdArgument; |
| 180 | StageOperation stageOperationAlpha; |
| 181 | SourceArgument firstArgumentAlpha; |
| 182 | SourceArgument secondArgumentAlpha; |
| 183 | SourceArgument thirdArgumentAlpha; |
| 184 | ArgumentModifier firstModifier; |
| 185 | ArgumentModifier secondModifier; |
| 186 | ArgumentModifier thirdModifier; |
| 187 | ArgumentModifier firstModifierAlpha; |
| 188 | ArgumentModifier secondModifierAlpha; |
| 189 | ArgumentModifier thirdModifierAlpha; |
| 190 | DestinationArgument destinationArgument; |
| 191 | |
| 192 | int texCoordIndex; |
| 193 | const Sampler *sampler; |
| 194 | const TextureStage *previousStage; |
| 195 | }; |
| 196 | } |
| 197 | |
| 198 | #endif // sw_TextureStage_hpp |