1 /* 2 * Copyright (C) 2008-2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.renderscript; 18 19 20 import android.util.Log; 21 22 23 /** 24 * @deprecated in API 16 25 * <p>ProgramFragmentFixedFunction is a helper class that provides 26 * a way to make a simple fragment shader without writing any 27 * GLSL code. This class allows for display of constant color, interpolated 28 * color from the vertex shader, or combinations of the both 29 * blended with results of up to two texture lookups.</p 30 * 31 **/ 32 public class ProgramFragmentFixedFunction extends ProgramFragment { 33 ProgramFragmentFixedFunction(int id, RenderScript rs) { 34 super(id, rs); 35 } 36 37 static class InternalBuilder extends BaseProgramBuilder { 38 /** 39 * @deprecated in API 16 40 */ 41 public InternalBuilder(RenderScript rs) { 42 super(rs); 43 } 44 45 /** 46 * @deprecated in API 16 47 * Creates ProgramFragmentFixedFunction from the current state 48 * of the builder 49 * 50 * @return ProgramFragmentFixedFunction 51 */ 52 public ProgramFragmentFixedFunction create() { 53 mRS.validate(); 54 int[] tmp = new int[(mInputCount + mOutputCount + mConstantCount + mTextureCount) * 2]; 55 String[] texNames = new String[mTextureCount]; 56 int idx = 0; 57 58 for (int i=0; i < mInputCount; i++) { 59 tmp[idx++] = ProgramParam.INPUT.mID; 60 tmp[idx++] = mInputs[i].getID(mRS); 61 } 62 for (int i=0; i < mOutputCount; i++) { 63 tmp[idx++] = ProgramParam.OUTPUT.mID; 64 tmp[idx++] = mOutputs[i].getID(mRS); 65 } 66 for (int i=0; i < mConstantCount; i++) { 67 tmp[idx++] = ProgramParam.CONSTANT.mID; 68 tmp[idx++] = mConstants[i].getID(mRS); 69 } 70 for (int i=0; i < mTextureCount; i++) { 71 tmp[idx++] = ProgramParam.TEXTURE_TYPE.mID; 72 tmp[idx++] = mTextureTypes[i].mID; 73 texNames[i] = mTextureNames[i]; 74 } 75 76 int id = mRS.nProgramFragmentCreate(mShader, texNames, tmp); 77 ProgramFragmentFixedFunction pf = new ProgramFragmentFixedFunction(id, mRS); 78 initProgram(pf); 79 return pf; 80 } 81 } 82 83 /** 84 * @deprecated in API 16 85 */ 86 public static class Builder { 87 /** 88 * @deprecated in API 16 89 */ 90 public static final int MAX_TEXTURE = 2; 91 int mNumTextures; 92 boolean mPointSpriteEnable; 93 boolean mVaryingColorEnable; 94 String mShader; 95 RenderScript mRS; 96 97 /** 98 * @deprecated in API 16 99 * EnvMode describes how textures are combined with the existing 100 * color in the fixed function fragment shader 101 * 102 **/ 103 public enum EnvMode { 104 /** 105 * @deprecated in API 16 106 **/ 107 REPLACE (1), 108 /** 109 * @deprecated in API 16 110 **/ 111 MODULATE (2), 112 /** 113 * @deprecated in API 16 114 **/ 115 DECAL (3); 116 117 int mID; 118 EnvMode(int id) { 119 mID = id; 120 } 121 } 122 123 /** 124 * @deprecated in API 16 125 * Format describes the pixel format of textures in the fixed 126 * function fragment shader and how they are sampled 127 * 128 **/ 129 public enum Format { 130 /** 131 * @deprecated in API 16 132 **/ 133 ALPHA (1), 134 /** 135 * @deprecated in API 16 136 **/ 137 LUMINANCE_ALPHA (2), 138 /** 139 * @deprecated in API 16 140 **/ 141 RGB (3), 142 /** 143 * @deprecated in API 16 144 **/ 145 RGBA (4); 146 147 int mID; 148 Format(int id) { 149 mID = id; 150 } 151 } 152 153 private class Slot { 154 EnvMode env; 155 Format format; 156 Slot(EnvMode _env, Format _fmt) { 157 env = _env; 158 format = _fmt; 159 } 160 } 161 Slot[] mSlots; 162 163 private void buildShaderString() { 164 mShader = "//rs_shader_internal\n"; 165 mShader += "varying lowp vec4 varColor;\n"; 166 mShader += "varying vec2 varTex0;\n"; 167 168 mShader += "void main() {\n"; 169 if (mVaryingColorEnable) { 170 mShader += " lowp vec4 col = varColor;\n"; 171 } else { 172 mShader += " lowp vec4 col = UNI_Color;\n"; 173 } 174 175 if (mNumTextures != 0) { 176 if (mPointSpriteEnable) { 177 mShader += " vec2 t0 = gl_PointCoord;\n"; 178 } else { 179 mShader += " vec2 t0 = varTex0.xy;\n"; 180 } 181 } 182 183 for(int i = 0; i < mNumTextures; i ++) { 184 switch(mSlots[i].env) { 185 case REPLACE: 186 switch (mSlots[i].format) { 187 case ALPHA: 188 mShader += " col.a = texture2D(UNI_Tex0, t0).a;\n"; 189 break; 190 case LUMINANCE_ALPHA: 191 mShader += " col.rgba = texture2D(UNI_Tex0, t0).rgba;\n"; 192 break; 193 case RGB: 194 mShader += " col.rgb = texture2D(UNI_Tex0, t0).rgb;\n"; 195 break; 196 case RGBA: 197 mShader += " col.rgba = texture2D(UNI_Tex0, t0).rgba;\n"; 198 break; 199 } 200 break; 201 case MODULATE: 202 switch (mSlots[i].format) { 203 case ALPHA: 204 mShader += " col.a *= texture2D(UNI_Tex0, t0).a;\n"; 205 break; 206 case LUMINANCE_ALPHA: 207 mShader += " col.rgba *= texture2D(UNI_Tex0, t0).rgba;\n"; 208 break; 209 case RGB: 210 mShader += " col.rgb *= texture2D(UNI_Tex0, t0).rgb;\n"; 211 break; 212 case RGBA: 213 mShader += " col.rgba *= texture2D(UNI_Tex0, t0).rgba;\n"; 214 break; 215 } 216 break; 217 case DECAL: 218 mShader += " col = texture2D(UNI_Tex0, t0);\n"; 219 break; 220 } 221 } 222 223 mShader += " gl_FragColor = col;\n"; 224 mShader += "}\n"; 225 } 226 227 /** 228 * @deprecated 229 * Creates a builder for fixed function fragment program 230 * 231 * @param rs Context to which the program will belong. 232 */ 233 public Builder(RenderScript rs) { 234 mRS = rs; 235 mSlots = new Slot[MAX_TEXTURE]; 236 mPointSpriteEnable = false; 237 } 238 239 /** 240 * @deprecated in API 16 241 * Adds a texture to be fetched as part of the fixed function 242 * fragment program 243 * 244 * @param env specifies how the texture is combined with the 245 * current color 246 * @param fmt specifies the format of the texture and how its 247 * components will be used to combine with the 248 * current color 249 * @param slot index of the texture to apply the operations on 250 * 251 * @return this 252 */ 253 public Builder setTexture(EnvMode env, Format fmt, int slot) 254 throws IllegalArgumentException { 255 if((slot < 0) || (slot >= MAX_TEXTURE)) { 256 throw new IllegalArgumentException("MAX_TEXTURE exceeded."); 257 } 258 mSlots[slot] = new Slot(env, fmt); 259 return this; 260 } 261 262 /** 263 * @deprecated in API 16 264 * Specifies whether the texture coordinate passed from the 265 * vertex program is replaced with an openGL internal point 266 * sprite texture coordinate 267 * 268 **/ 269 public Builder setPointSpriteTexCoordinateReplacement(boolean enable) { 270 mPointSpriteEnable = enable; 271 return this; 272 } 273 274 /** 275 * @deprecated in API 16 276 * Specifies whether the varying color passed from the vertex 277 * program or the constant color set on the fragment program is 278 * used in the final color calculation in the fixed function 279 * fragment shader 280 * 281 **/ 282 public Builder setVaryingColor(boolean enable) { 283 mVaryingColorEnable = enable; 284 return this; 285 } 286 287 /** 288 * @deprecated in API 16 289 * Creates the fixed function fragment program from the current 290 * state of the builder. 291 * 292 */ 293 public ProgramFragmentFixedFunction create() { 294 InternalBuilder sb = new InternalBuilder(mRS); 295 mNumTextures = 0; 296 for(int i = 0; i < MAX_TEXTURE; i ++) { 297 if(mSlots[i] != null) { 298 mNumTextures ++; 299 } 300 } 301 buildShaderString(); 302 sb.setShader(mShader); 303 304 Type constType = null; 305 if (!mVaryingColorEnable) { 306 Element.Builder b = new Element.Builder(mRS); 307 b.add(Element.F32_4(mRS), "Color"); 308 Type.Builder typeBuilder = new Type.Builder(mRS, b.create()); 309 typeBuilder.setX(1); 310 constType = typeBuilder.create(); 311 sb.addConstant(constType); 312 } 313 for (int i = 0; i < mNumTextures; i ++) { 314 sb.addTexture(TextureType.TEXTURE_2D); 315 } 316 317 ProgramFragmentFixedFunction pf = sb.create(); 318 pf.mTextureCount = MAX_TEXTURE; 319 if (!mVaryingColorEnable) { 320 Allocation constantData = Allocation.createTyped(mRS,constType); 321 FieldPacker fp = new FieldPacker(16); 322 Float4 f4 = new Float4(1.f, 1.f, 1.f, 1.f); 323 fp.addF32(f4); 324 constantData.setFromFieldPacker(0, fp); 325 pf.bindConstants(constantData, 0); 326 } 327 return pf; 328 } 329 } 330 } 331 332 333 334 335
