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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_PixelProcessor_hpp
16 #define sw_PixelProcessor_hpp
17 
18 #include "Context.hpp"
19 #include "RoutineCache.hpp"
20 
21 namespace sw
22 {
23 	class PixelShader;
24 	class Rasterizer;
25 	struct Texture;
26 	struct DrawData;
27 
28 	class PixelProcessor
29 	{
30 	public:
31 		struct States : Memset<States>
32 		{
Statessw::PixelProcessor::States33 			States() : Memset(this, 0) {}
34 
35 			uint32_t computeHash();
36 
37 			int shaderID;
38 
39 			bool depthOverride                        : 1;   // TODO: Eliminate by querying shader.
40 			bool shaderContainsKill                   : 1;   // TODO: Eliminate by querying shader.
41 
42 			DepthCompareMode depthCompareMode         : BITS(DEPTH_LAST);
43 			AlphaCompareMode alphaCompareMode         : BITS(ALPHA_LAST);
44 			bool depthWriteEnable                     : 1;
45 			bool quadLayoutDepthBuffer                : 1;
46 
47 			bool stencilActive                        : 1;
48 			StencilCompareMode stencilCompareMode     : BITS(STENCIL_LAST);
49 			StencilOperation stencilFailOperation     : BITS(OPERATION_LAST);
50 			StencilOperation stencilPassOperation     : BITS(OPERATION_LAST);
51 			StencilOperation stencilZFailOperation    : BITS(OPERATION_LAST);
52 			bool noStencilMask                        : 1;
53 			bool noStencilWriteMask                   : 1;
54 			bool stencilWriteMasked                   : 1;
55 			bool twoSidedStencil                      : 1;
56 			StencilCompareMode stencilCompareModeCCW  : BITS(STENCIL_LAST);
57 			StencilOperation stencilFailOperationCCW  : BITS(OPERATION_LAST);
58 			StencilOperation stencilPassOperationCCW  : BITS(OPERATION_LAST);
59 			StencilOperation stencilZFailOperationCCW : BITS(OPERATION_LAST);
60 			bool noStencilMaskCCW                     : 1;
61 			bool noStencilWriteMaskCCW                : 1;
62 			bool stencilWriteMaskedCCW                : 1;
63 
64 			bool depthTestActive                      : 1;
65 			bool fogActive                            : 1;
66 			FogMode pixelFogMode                      : BITS(FOG_LAST);
67 			bool specularAdd                          : 1;
68 			bool occlusionEnabled                     : 1;
69 			bool wBasedFog                            : 1;
70 			bool perspective                          : 1;
71 			bool depthClamp                           : 1;
72 
73 			bool alphaBlendActive                     : 1;
74 			BlendFactor sourceBlendFactor             : BITS(BLEND_LAST);
75 			BlendFactor destBlendFactor               : BITS(BLEND_LAST);
76 			BlendOperation blendOperation             : BITS(BLENDOP_LAST);
77 			BlendFactor sourceBlendFactorAlpha        : BITS(BLEND_LAST);
78 			BlendFactor destBlendFactorAlpha          : BITS(BLEND_LAST);
79 			BlendOperation blendOperationAlpha        : BITS(BLENDOP_LAST);
80 
81 			unsigned int colorWriteMask                       : RENDERTARGETS * 4;   // Four component bit masks
82 			Format targetFormat[RENDERTARGETS];
83 			bool writeSRGB                                    : 1;
84 			unsigned int multiSample                          : 3;
85 			unsigned int multiSampleMask                      : 4;
86 			TransparencyAntialiasing transparencyAntialiasing : BITS(TRANSPARENCY_LAST);
87 			bool centroid                                     : 1;
88 			bool frontFaceCCW                                 : 1;
89 
90 			LogicalOperation logicalOperation : BITS(LOGICALOP_LAST);
91 
92 			Sampler::State sampler[TEXTURE_IMAGE_UNITS];
93 			TextureStage::State textureStage[8];
94 
95 			struct Interpolant
96 			{
97 				unsigned char component : 4;
98 				unsigned char flat : 4;
99 				unsigned char project : 2;
100 				bool centroid : 1;
101 			};
102 
103 			union
104 			{
105 				struct
106 				{
107 					Interpolant color[2];
108 					Interpolant texture[8];
109 					Interpolant fog;
110 				};
111 
112 				Interpolant interpolant[MAX_FRAGMENT_INPUTS];
113 			};
114 		};
115 
116 		struct State : States
117 		{
118 			bool operator==(const State &state) const;
119 
colorWriteActivesw::PixelProcessor::State120 			int colorWriteActive(int index) const
121 			{
122 				return (colorWriteMask >> (index * 4)) & 0xF;
123 			}
124 
alphaTestActivesw::PixelProcessor::State125 			bool alphaTestActive() const
126 			{
127 				return (alphaCompareMode != ALPHA_ALWAYS) || (transparencyAntialiasing != TRANSPARENCY_NONE);
128 			}
129 
pixelFogActivesw::PixelProcessor::State130 			bool pixelFogActive() const
131 			{
132 				return pixelFogMode != FOG_NONE;
133 			}
134 
135 			uint32_t hash;
136 		};
137 
138 		struct Stencil
139 		{
140 			int64_t testMaskQ;
141 			int64_t referenceMaskedQ;
142 			int64_t referenceMaskedSignedQ;
143 			int64_t writeMaskQ;
144 			int64_t invWriteMaskQ;
145 			int64_t referenceQ;
146 
setsw::PixelProcessor::Stencil147 			void set(int reference, int testMask, int writeMask)
148 			{
149 				referenceQ = replicate(reference);
150 				testMaskQ = replicate(testMask);
151 				writeMaskQ = replicate(writeMask);
152 				invWriteMaskQ = ~writeMaskQ;
153 				referenceMaskedQ = referenceQ & testMaskQ;
154 				referenceMaskedSignedQ = replicate(((reference & testMask) + 0x80) & 0xFF);
155 			}
156 
replicatesw::PixelProcessor::Stencil157 			static int64_t replicate(int b)
158 			{
159 				int64_t w = b & 0xFF;
160 
161 				return (w << 0) | (w << 8) | (w << 16) | (w << 24) | (w << 32) | (w << 40) | (w << 48) | (w << 56);
162 			}
163 		};
164 
165 		struct Fog
166 		{
167 			float4 scale;
168 			float4 offset;
169 			word4 color4[3];
170 			float4 colorF[3];
171 			float4 densityE;
172 			float4 density2E;
173 		};
174 
175 		struct Factor
176 		{
177 			word4 textureFactor4[4];
178 
179 			word4 alphaReference4;
180 
181 			word4 blendConstant4W[4];
182 			float4 blendConstant4F[4];
183 			word4 invBlendConstant4W[4];
184 			float4 invBlendConstant4F[4];
185 		};
186 
187 	public:
188 		typedef void (*RoutinePointer)(const Primitive *primitive, int count, int thread, DrawData *draw);
189 
190 		PixelProcessor(Context *context);
191 
192 		virtual ~PixelProcessor();
193 
194 		void setFloatConstant(unsigned int index, const float value[4]);
195 		void setIntegerConstant(unsigned int index, const int value[4]);
196 		void setBooleanConstant(unsigned int index, int boolean);
197 
198 		void setUniformBuffer(int index, sw::Resource* buffer, int offset);
199 		void lockUniformBuffers(byte** u, sw::Resource* uniformBuffers[]);
200 
201 		void setRenderTarget(int index, Surface *renderTarget, unsigned int layer = 0);
202 		void setDepthBuffer(Surface *depthBuffer, unsigned int layer = 0);
203 		void setStencilBuffer(Surface *stencilBuffer, unsigned int layer = 0);
204 
205 		void setTexCoordIndex(unsigned int stage, int texCoordIndex);
206 		void setStageOperation(unsigned int stage, TextureStage::StageOperation stageOperation);
207 		void setFirstArgument(unsigned int stage, TextureStage::SourceArgument firstArgument);
208 		void setSecondArgument(unsigned int stage, TextureStage::SourceArgument secondArgument);
209 		void setThirdArgument(unsigned int stage, TextureStage::SourceArgument thirdArgument);
210 		void setStageOperationAlpha(unsigned int stage, TextureStage::StageOperation stageOperationAlpha);
211 		void setFirstArgumentAlpha(unsigned int stage, TextureStage::SourceArgument firstArgumentAlpha);
212 		void setSecondArgumentAlpha(unsigned int stage, TextureStage::SourceArgument secondArgumentAlpha);
213 		void setThirdArgumentAlpha(unsigned int stage, TextureStage::SourceArgument thirdArgumentAlpha);
214 		void setFirstModifier(unsigned int stage, TextureStage::ArgumentModifier firstModifier);
215 		void setSecondModifier(unsigned int stage, TextureStage::ArgumentModifier secondModifier);
216 		void setThirdModifier(unsigned int stage, TextureStage::ArgumentModifier thirdModifier);
217 		void setFirstModifierAlpha(unsigned int stage, TextureStage::ArgumentModifier firstModifierAlpha);
218 		void setSecondModifierAlpha(unsigned int stage, TextureStage::ArgumentModifier secondModifierAlpha);
219 		void setThirdModifierAlpha(unsigned int stage, TextureStage::ArgumentModifier thirdModifierAlpha);
220 		void setDestinationArgument(unsigned int stage, TextureStage::DestinationArgument destinationArgument);
221 		void setConstantColor(unsigned int stage, const Color<float> &constantColor);
222 		void setBumpmapMatrix(unsigned int stage, int element, float value);
223 		void setLuminanceScale(unsigned int stage, float value);
224 		void setLuminanceOffset(unsigned int stage, float value);
225 
226 		void setTextureFilter(unsigned int sampler, FilterType textureFilter);
227 		void setMipmapFilter(unsigned int sampler, MipmapType mipmapFilter);
228 		void setGatherEnable(unsigned int sampler, bool enable);
229 		void setAddressingModeU(unsigned int sampler, AddressingMode addressingMode);
230 		void setAddressingModeV(unsigned int sampler, AddressingMode addressingMode);
231 		void setAddressingModeW(unsigned int sampler, AddressingMode addressingMode);
232 		void setReadSRGB(unsigned int sampler, bool sRGB);
233 		void setMipmapLOD(unsigned int sampler, float bias);
234 		void setBorderColor(unsigned int sampler, const Color<float> &borderColor);
235 		void setMaxAnisotropy(unsigned int sampler, float maxAnisotropy);
236 		void setHighPrecisionFiltering(unsigned int sampler, bool highPrecisionFiltering);
237 		void setSwizzleR(unsigned int sampler, SwizzleType swizzleR);
238 		void setSwizzleG(unsigned int sampler, SwizzleType swizzleG);
239 		void setSwizzleB(unsigned int sampler, SwizzleType swizzleB);
240 		void setSwizzleA(unsigned int sampler, SwizzleType swizzleA);
241 		void setCompareFunc(unsigned int sampler, CompareFunc compare);
242 		void setBaseLevel(unsigned int sampler, int baseLevel);
243 		void setMaxLevel(unsigned int sampler, int maxLevel);
244 		void setMinLod(unsigned int sampler, float minLod);
245 		void setMaxLod(unsigned int sampler, float maxLod);
246 		void setSyncRequired(unsigned int sampler, bool isSincRequired);
247 
248 		void setWriteSRGB(bool sRGB);
249 		void setDepthBufferEnable(bool depthBufferEnable);
250 		void setDepthCompare(DepthCompareMode depthCompareMode);
251 		void setAlphaCompare(AlphaCompareMode alphaCompareMode);
252 		void setDepthWriteEnable(bool depthWriteEnable);
253 		void setAlphaTestEnable(bool alphaTestEnable);
254 		void setCullMode(CullMode cullMode, bool frontFacingCCW);
255 		void setColorWriteMask(int index, int rgbaMask);
256 
257 		void setColorLogicOpEnabled(bool colorLogicOpEnabled);
258 		void setLogicalOperation(LogicalOperation logicalOperation);
259 
260 		void setStencilEnable(bool stencilEnable);
261 		void setStencilCompare(StencilCompareMode stencilCompareMode);
262 		void setStencilReference(int stencilReference);
263 		void setStencilMask(int stencilMask);
264 		void setStencilFailOperation(StencilOperation stencilFailOperation);
265 		void setStencilPassOperation(StencilOperation stencilPassOperation);
266 		void setStencilZFailOperation(StencilOperation stencilZFailOperation);
267 		void setStencilWriteMask(int stencilWriteMask);
268 		void setTwoSidedStencil(bool enable);
269 		void setStencilCompareCCW(StencilCompareMode stencilCompareMode);
270 		void setStencilReferenceCCW(int stencilReference);
271 		void setStencilMaskCCW(int stencilMask);
272 		void setStencilFailOperationCCW(StencilOperation stencilFailOperation);
273 		void setStencilPassOperationCCW(StencilOperation stencilPassOperation);
274 		void setStencilZFailOperationCCW(StencilOperation stencilZFailOperation);
275 		void setStencilWriteMaskCCW(int stencilWriteMask);
276 
277 		void setTextureFactor(const Color<float> &textureFactor);
278 		void setBlendConstant(const Color<float> &blendConstant);
279 
280 		void setFillMode(FillMode fillMode);
281 		void setShadingMode(ShadingMode shadingMode);
282 
283 		void setAlphaBlendEnable(bool alphaBlendEnable);
284 		void setSourceBlendFactor(BlendFactor sourceBlendFactor);
285 		void setDestBlendFactor(BlendFactor destBlendFactor);
286 		void setBlendOperation(BlendOperation blendOperation);
287 
288 		void setSeparateAlphaBlendEnable(bool separateAlphaBlendEnable);
289 		void setSourceBlendFactorAlpha(BlendFactor sourceBlendFactorAlpha);
290 		void setDestBlendFactorAlpha(BlendFactor destBlendFactorAlpha);
291 		void setBlendOperationAlpha(BlendOperation blendOperationAlpha);
292 
293 		void setAlphaReference(float alphaReference);
294 
295 		void setGlobalMipmapBias(float bias);
296 
297 		void setFogStart(float start);
298 		void setFogEnd(float end);
299 		void setFogColor(Color<float> fogColor);
300 		void setFogDensity(float fogDensity);
301 		void setPixelFogMode(FogMode fogMode);
302 
303 		void setPerspectiveCorrection(bool perspectiveCorrection);
304 
305 		void setOcclusionEnabled(bool enable);
306 
307 	protected:
308 		const State update() const;
309 		std::shared_ptr<Routine> routine(const State &state);
310 		void setRoutineCacheSize(int routineCacheSize);
311 
312 		// Shader constants
313 		word4 cW[8][4];
314 		float4 c[FRAGMENT_UNIFORM_VECTORS];
315 		int4 i[16];
316 		bool b[16];
317 
318 		// Other semi-constants
319 		Stencil stencil;
320 		Stencil stencilCCW;
321 		Fog fog;
322 		Factor factor;
323 
324 	private:
325 		struct UniformBufferInfo
326 		{
327 			UniformBufferInfo();
328 
329 			Resource* buffer;
330 			int offset;
331 		};
332 		UniformBufferInfo uniformBufferInfo[MAX_UNIFORM_BUFFER_BINDINGS];
333 
334 		void setFogRanges(float start, float end);
335 
336 		Context *const context;
337 
338 		RoutineCache<State> *routineCache;
339 	};
340 }
341 
342 #endif   // sw_PixelProcessor_hpp
343