1 /* 2 * Copyright (C) 2010 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 #define LOG_TAG "OpenGLRenderer" 18 19 #include <utils/String8.h> 20 21 #include "Caches.h" 22 #include "Dither.h" 23 #include "ProgramCache.h" 24 25 namespace android { 26 namespace uirenderer { 27 28 /////////////////////////////////////////////////////////////////////////////// 29 // Defines 30 /////////////////////////////////////////////////////////////////////////////// 31 32 #define MODULATE_OP_NO_MODULATE 0 33 #define MODULATE_OP_MODULATE 1 34 #define MODULATE_OP_MODULATE_A8 2 35 36 #define STR(x) STR1(x) 37 #define STR1(x) #x 38 39 /////////////////////////////////////////////////////////////////////////////// 40 // Vertex shaders snippets 41 /////////////////////////////////////////////////////////////////////////////// 42 43 const char* gVS_Header_Attributes = 44 "attribute vec4 position;\n"; 45 const char* gVS_Header_Attributes_TexCoords = 46 "attribute vec2 texCoords;\n"; 47 const char* gVS_Header_Attributes_Colors = 48 "attribute vec4 colors;\n"; 49 const char* gVS_Header_Attributes_AAVertexShapeParameters = 50 "attribute float vtxAlpha;\n"; 51 const char* gVS_Header_Uniforms_TextureTransform = 52 "uniform mat4 mainTextureTransform;\n"; 53 const char* gVS_Header_Uniforms = 54 "uniform mat4 projection;\n" \ 55 "uniform mat4 transform;\n"; 56 const char* gVS_Header_Uniforms_IsPoint = 57 "uniform mediump float pointSize;\n"; 58 const char* gVS_Header_Uniforms_HasGradient = 59 "uniform mat4 screenSpace;\n"; 60 const char* gVS_Header_Uniforms_HasBitmap = 61 "uniform mat4 textureTransform;\n" 62 "uniform mediump vec2 textureDimension;\n"; 63 const char* gVS_Header_Varyings_HasTexture = 64 "varying vec2 outTexCoords;\n"; 65 const char* gVS_Header_Varyings_HasColors = 66 "varying vec4 outColors;\n"; 67 const char* gVS_Header_Varyings_IsAAVertexShape = 68 "varying float alpha;\n"; 69 const char* gVS_Header_Varyings_HasBitmap = 70 "varying highp vec2 outBitmapTexCoords;\n"; 71 const char* gVS_Header_Varyings_PointHasBitmap = 72 "varying highp vec2 outPointBitmapTexCoords;\n"; 73 const char* gVS_Header_Varyings_HasGradient[6] = { 74 // Linear 75 "varying highp vec2 linear;\n" 76 "varying vec2 ditherTexCoords;\n", 77 "varying float linear;\n" 78 "varying vec2 ditherTexCoords;\n", 79 80 // Circular 81 "varying highp vec2 circular;\n" 82 "varying vec2 ditherTexCoords;\n", 83 "varying highp vec2 circular;\n" 84 "varying vec2 ditherTexCoords;\n", 85 86 // Sweep 87 "varying highp vec2 sweep;\n" 88 "varying vec2 ditherTexCoords;\n", 89 "varying highp vec2 sweep;\n" 90 "varying vec2 ditherTexCoords;\n", 91 }; 92 const char* gVS_Main = 93 "\nvoid main(void) {\n"; 94 const char* gVS_Main_OutTexCoords = 95 " outTexCoords = texCoords;\n"; 96 const char* gVS_Main_OutColors = 97 " outColors = colors;\n"; 98 const char* gVS_Main_OutTransformedTexCoords = 99 " outTexCoords = (mainTextureTransform * vec4(texCoords, 0.0, 1.0)).xy;\n"; 100 const char* gVS_Main_OutGradient[6] = { 101 // Linear 102 " linear = vec2((screenSpace * position).x, 0.5);\n" 103 " ditherTexCoords = (transform * position).xy * " STR(DITHER_KERNEL_SIZE_INV) ";\n", 104 " linear = (screenSpace * position).x;\n" 105 " ditherTexCoords = (transform * position).xy * " STR(DITHER_KERNEL_SIZE_INV) ";\n", 106 107 // Circular 108 " circular = (screenSpace * position).xy;\n" 109 " ditherTexCoords = (transform * position).xy * " STR(DITHER_KERNEL_SIZE_INV) ";\n", 110 " circular = (screenSpace * position).xy;\n" 111 " ditherTexCoords = (transform * position).xy * " STR(DITHER_KERNEL_SIZE_INV) ";\n", 112 113 // Sweep 114 " sweep = (screenSpace * position).xy;\n" 115 " ditherTexCoords = (transform * position).xy * " STR(DITHER_KERNEL_SIZE_INV) ";\n", 116 " sweep = (screenSpace * position).xy;\n" 117 " ditherTexCoords = (transform * position).xy * " STR(DITHER_KERNEL_SIZE_INV) ";\n", 118 }; 119 const char* gVS_Main_OutBitmapTexCoords = 120 " outBitmapTexCoords = (textureTransform * position).xy * textureDimension;\n"; 121 const char* gVS_Main_OutPointBitmapTexCoords = 122 " outPointBitmapTexCoords = (textureTransform * position).xy * textureDimension;\n"; 123 const char* gVS_Main_Position = 124 " gl_Position = projection * transform * position;\n"; 125 const char* gVS_Main_PointSize = 126 " gl_PointSize = pointSize;\n"; 127 const char* gVS_Main_AAVertexShape = 128 " alpha = vtxAlpha;\n"; 129 const char* gVS_Footer = 130 "}\n\n"; 131 132 /////////////////////////////////////////////////////////////////////////////// 133 // Fragment shaders snippets 134 /////////////////////////////////////////////////////////////////////////////// 135 136 const char* gFS_Header_Extension_FramebufferFetch = 137 "#extension GL_NV_shader_framebuffer_fetch : enable\n\n"; 138 const char* gFS_Header_Extension_ExternalTexture = 139 "#extension GL_OES_EGL_image_external : require\n\n"; 140 const char* gFS_Header = 141 "precision mediump float;\n\n"; 142 const char* gFS_Uniforms_Color = 143 "uniform vec4 color;\n"; 144 const char* gFS_Header_Uniforms_PointHasBitmap = 145 "uniform vec2 textureDimension;\n" 146 "uniform float pointSize;\n"; 147 const char* gFS_Uniforms_TextureSampler = 148 "uniform sampler2D baseSampler;\n"; 149 const char* gFS_Uniforms_ExternalTextureSampler = 150 "uniform samplerExternalOES baseSampler;\n"; 151 const char* gFS_Uniforms_Dither = 152 "uniform sampler2D ditherSampler;"; 153 const char* gFS_Uniforms_GradientSampler[2] = { 154 "%s\n" 155 "uniform sampler2D gradientSampler;\n", 156 "%s\n" 157 "uniform vec4 startColor;\n" 158 "uniform vec4 endColor;\n" 159 }; 160 const char* gFS_Uniforms_BitmapSampler = 161 "uniform sampler2D bitmapSampler;\n"; 162 const char* gFS_Uniforms_ColorOp[4] = { 163 // None 164 "", 165 // Matrix 166 "uniform mat4 colorMatrix;\n" 167 "uniform vec4 colorMatrixVector;\n", 168 // Lighting 169 "uniform vec4 lightingMul;\n" 170 "uniform vec4 lightingAdd;\n", 171 // PorterDuff 172 "uniform vec4 colorBlend;\n" 173 }; 174 const char* gFS_Uniforms_Gamma = 175 "uniform float gamma;\n"; 176 177 const char* gFS_Main = 178 "\nvoid main(void) {\n" 179 " lowp vec4 fragColor;\n"; 180 181 const char* gFS_Main_PointBitmapTexCoords = 182 " highp vec2 outBitmapTexCoords = outPointBitmapTexCoords + " 183 "((gl_PointCoord - vec2(0.5, 0.5)) * textureDimension * vec2(pointSize, pointSize));\n"; 184 185 const char* gFS_Main_Dither[2] = { 186 // ES 2.0 187 "texture2D(ditherSampler, ditherTexCoords).a * " STR(DITHER_KERNEL_SIZE_INV_SQUARE), 188 // ES 3.0 189 "texture2D(ditherSampler, ditherTexCoords).a" 190 }; 191 const char* gFS_Main_AddDitherToGradient = 192 " gradientColor += %s;\n"; 193 194 // Fast cases 195 const char* gFS_Fast_SingleColor = 196 "\nvoid main(void) {\n" 197 " gl_FragColor = color;\n" 198 "}\n\n"; 199 const char* gFS_Fast_SingleTexture = 200 "\nvoid main(void) {\n" 201 " gl_FragColor = texture2D(baseSampler, outTexCoords);\n" 202 "}\n\n"; 203 const char* gFS_Fast_SingleModulateTexture = 204 "\nvoid main(void) {\n" 205 " gl_FragColor = color.a * texture2D(baseSampler, outTexCoords);\n" 206 "}\n\n"; 207 const char* gFS_Fast_SingleA8Texture = 208 "\nvoid main(void) {\n" 209 " gl_FragColor = texture2D(baseSampler, outTexCoords);\n" 210 "}\n\n"; 211 const char* gFS_Fast_SingleA8Texture_ApplyGamma = 212 "\nvoid main(void) {\n" 213 " gl_FragColor = vec4(0.0, 0.0, 0.0, pow(texture2D(baseSampler, outTexCoords).a, gamma));\n" 214 "}\n\n"; 215 const char* gFS_Fast_SingleModulateA8Texture = 216 "\nvoid main(void) {\n" 217 " gl_FragColor = color * texture2D(baseSampler, outTexCoords).a;\n" 218 "}\n\n"; 219 const char* gFS_Fast_SingleModulateA8Texture_ApplyGamma = 220 "\nvoid main(void) {\n" 221 " gl_FragColor = color * pow(texture2D(baseSampler, outTexCoords).a, gamma);\n" 222 "}\n\n"; 223 const char* gFS_Fast_SingleGradient[2] = { 224 "\nvoid main(void) {\n" 225 " gl_FragColor = %s + texture2D(gradientSampler, linear);\n" 226 "}\n\n", 227 "\nvoid main(void) {\n" 228 " gl_FragColor = %s + mix(startColor, endColor, clamp(linear, 0.0, 1.0));\n" 229 "}\n\n", 230 }; 231 const char* gFS_Fast_SingleModulateGradient[2] = { 232 "\nvoid main(void) {\n" 233 " gl_FragColor = %s + color.a * texture2D(gradientSampler, linear);\n" 234 "}\n\n", 235 "\nvoid main(void) {\n" 236 " gl_FragColor = %s + color.a * mix(startColor, endColor, clamp(linear, 0.0, 1.0));\n" 237 "}\n\n" 238 }; 239 240 // General case 241 const char* gFS_Main_FetchColor = 242 " fragColor = color;\n"; 243 const char* gFS_Main_ModulateColor = 244 " fragColor *= color.a;\n"; 245 const char* gFS_Main_AccountForAAVertexShape = 246 " fragColor *= alpha;\n"; 247 248 const char* gFS_Main_FetchTexture[2] = { 249 // Don't modulate 250 " fragColor = texture2D(baseSampler, outTexCoords);\n", 251 // Modulate 252 " fragColor = color * texture2D(baseSampler, outTexCoords);\n" 253 }; 254 const char* gFS_Main_FetchA8Texture[4] = { 255 // Don't modulate 256 " fragColor = texture2D(baseSampler, outTexCoords);\n", 257 " fragColor = texture2D(baseSampler, outTexCoords);\n", 258 // Modulate 259 " fragColor = color * texture2D(baseSampler, outTexCoords).a;\n", 260 " fragColor = color * pow(texture2D(baseSampler, outTexCoords).a, gamma);\n" 261 }; 262 const char* gFS_Main_FetchGradient[6] = { 263 // Linear 264 " vec4 gradientColor = texture2D(gradientSampler, linear);\n", 265 266 " vec4 gradientColor = mix(startColor, endColor, clamp(linear, 0.0, 1.0));\n", 267 268 // Circular 269 " vec4 gradientColor = texture2D(gradientSampler, vec2(length(circular), 0.5));\n", 270 271 " vec4 gradientColor = mix(startColor, endColor, clamp(length(circular), 0.0, 1.0));\n", 272 273 // Sweep 274 " highp float index = atan(sweep.y, sweep.x) * 0.15915494309; // inv(2 * PI)\n" 275 " vec4 gradientColor = texture2D(gradientSampler, vec2(index - floor(index), 0.5));\n", 276 277 " highp float index = atan(sweep.y, sweep.x) * 0.15915494309; // inv(2 * PI)\n" 278 " vec4 gradientColor = mix(startColor, endColor, clamp(index - floor(index), 0.0, 1.0));\n" 279 }; 280 const char* gFS_Main_FetchBitmap = 281 " vec4 bitmapColor = texture2D(bitmapSampler, outBitmapTexCoords);\n"; 282 const char* gFS_Main_FetchBitmapNpot = 283 " vec4 bitmapColor = texture2D(bitmapSampler, wrap(outBitmapTexCoords));\n"; 284 const char* gFS_Main_BlendShadersBG = 285 " fragColor = blendShaders(gradientColor, bitmapColor)"; 286 const char* gFS_Main_BlendShadersGB = 287 " fragColor = blendShaders(bitmapColor, gradientColor)"; 288 const char* gFS_Main_BlendShaders_Modulate[6] = { 289 // Don't modulate 290 ";\n", 291 ";\n", 292 // Modulate 293 " * color.a;\n", 294 " * color.a;\n", 295 // Modulate with alpha 8 texture 296 " * texture2D(baseSampler, outTexCoords).a;\n", 297 " * pow(texture2D(baseSampler, outTexCoords).a, gamma);\n" 298 }; 299 const char* gFS_Main_GradientShader_Modulate[6] = { 300 // Don't modulate 301 " fragColor = gradientColor;\n", 302 " fragColor = gradientColor;\n", 303 // Modulate 304 " fragColor = gradientColor * color.a;\n", 305 " fragColor = gradientColor * color.a;\n", 306 // Modulate with alpha 8 texture 307 " fragColor = gradientColor * texture2D(baseSampler, outTexCoords).a;\n", 308 " fragColor = gradientColor * pow(texture2D(baseSampler, outTexCoords).a, gamma);\n" 309 }; 310 const char* gFS_Main_BitmapShader_Modulate[6] = { 311 // Don't modulate 312 " fragColor = bitmapColor;\n", 313 " fragColor = bitmapColor;\n", 314 // Modulate 315 " fragColor = bitmapColor * color.a;\n", 316 " fragColor = bitmapColor * color.a;\n", 317 // Modulate with alpha 8 texture 318 " fragColor = bitmapColor * texture2D(baseSampler, outTexCoords).a;\n", 319 " fragColor = bitmapColor * pow(texture2D(baseSampler, outTexCoords).a, gamma);\n" 320 }; 321 const char* gFS_Main_FragColor = 322 " gl_FragColor = fragColor;\n"; 323 const char* gFS_Main_FragColor_HasColors = 324 " gl_FragColor *= outColors;\n"; 325 const char* gFS_Main_FragColor_Blend = 326 " gl_FragColor = blendFramebuffer(fragColor, gl_LastFragColor);\n"; 327 const char* gFS_Main_FragColor_Blend_Swap = 328 " gl_FragColor = blendFramebuffer(gl_LastFragColor, fragColor);\n"; 329 const char* gFS_Main_ApplyColorOp[4] = { 330 // None 331 "", 332 // Matrix 333 " fragColor *= colorMatrix;\n" 334 " fragColor += colorMatrixVector;\n" 335 " fragColor.rgb *= fragColor.a;\n", 336 // Lighting 337 " float lightingAlpha = fragColor.a;\n" 338 " fragColor = min(fragColor * lightingMul + (lightingAdd * lightingAlpha), lightingAlpha);\n" 339 " fragColor.a = lightingAlpha;\n", 340 // PorterDuff 341 " fragColor = blendColors(colorBlend, fragColor);\n" 342 }; 343 const char* gFS_Main_DebugHighlight = 344 " gl_FragColor.rgb = vec3(0.0, gl_FragColor.a, 0.0);\n"; 345 const char* gFS_Footer = 346 "}\n\n"; 347 348 /////////////////////////////////////////////////////////////////////////////// 349 // PorterDuff snippets 350 /////////////////////////////////////////////////////////////////////////////// 351 352 const char* gBlendOps[18] = { 353 // Clear 354 "return vec4(0.0, 0.0, 0.0, 0.0);\n", 355 // Src 356 "return src;\n", 357 // Dst 358 "return dst;\n", 359 // SrcOver 360 "return src + dst * (1.0 - src.a);\n", 361 // DstOver 362 "return dst + src * (1.0 - dst.a);\n", 363 // SrcIn 364 "return src * dst.a;\n", 365 // DstIn 366 "return dst * src.a;\n", 367 // SrcOut 368 "return src * (1.0 - dst.a);\n", 369 // DstOut 370 "return dst * (1.0 - src.a);\n", 371 // SrcAtop 372 "return vec4(src.rgb * dst.a + (1.0 - src.a) * dst.rgb, dst.a);\n", 373 // DstAtop 374 "return vec4(dst.rgb * src.a + (1.0 - dst.a) * src.rgb, src.a);\n", 375 // Xor 376 "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb, " 377 "src.a + dst.a - 2.0 * src.a * dst.a);\n", 378 // Add 379 "return min(src + dst, 1.0);\n", 380 // Multiply 381 "return src * dst;\n", 382 // Screen 383 "return src + dst - src * dst;\n", 384 // Overlay 385 "return clamp(vec4(mix(" 386 "2.0 * src.rgb * dst.rgb + src.rgb * (1.0 - dst.a) + dst.rgb * (1.0 - src.a), " 387 "src.a * dst.a - 2.0 * (dst.a - dst.rgb) * (src.a - src.rgb) + src.rgb * (1.0 - dst.a) + dst.rgb * (1.0 - src.a), " 388 "step(dst.a, 2.0 * dst.rgb)), " 389 "src.a + dst.a - src.a * dst.a), 0.0, 1.0);\n", 390 // Darken 391 "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb + " 392 "min(src.rgb * dst.a, dst.rgb * src.a), src.a + dst.a - src.a * dst.a);\n", 393 // Lighten 394 "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb + " 395 "max(src.rgb * dst.a, dst.rgb * src.a), src.a + dst.a - src.a * dst.a);\n", 396 }; 397 398 /////////////////////////////////////////////////////////////////////////////// 399 // Constructors/destructors 400 /////////////////////////////////////////////////////////////////////////////// 401 402 ProgramCache::ProgramCache(): mHasES3(Extensions::getInstance().getMajorGlVersion() >= 3) { 403 } 404 405 ProgramCache::~ProgramCache() { 406 clear(); 407 } 408 409 /////////////////////////////////////////////////////////////////////////////// 410 // Cache management 411 /////////////////////////////////////////////////////////////////////////////// 412 413 void ProgramCache::clear() { 414 PROGRAM_LOGD("Clearing program cache"); 415 416 size_t count = mCache.size(); 417 for (size_t i = 0; i < count; i++) { 418 delete mCache.valueAt(i); 419 } 420 mCache.clear(); 421 } 422 423 Program* ProgramCache::get(const ProgramDescription& description) { 424 programid key = description.key(); 425 if (key == (PROGRAM_KEY_TEXTURE | PROGRAM_KEY_A8_TEXTURE)) { 426 // program for A8, unmodulated, texture w/o shader (black text/path textures) is equivalent 427 // to standard texture program (bitmaps, patches). Consider them equivalent. 428 key = PROGRAM_KEY_TEXTURE; 429 } 430 431 ssize_t index = mCache.indexOfKey(key); 432 Program* program = NULL; 433 if (index < 0) { 434 description.log("Could not find program"); 435 program = generateProgram(description, key); 436 mCache.add(key, program); 437 } else { 438 program = mCache.valueAt(index); 439 } 440 return program; 441 } 442 443 /////////////////////////////////////////////////////////////////////////////// 444 // Program generation 445 /////////////////////////////////////////////////////////////////////////////// 446 447 Program* ProgramCache::generateProgram(const ProgramDescription& description, programid key) { 448 String8 vertexShader = generateVertexShader(description); 449 String8 fragmentShader = generateFragmentShader(description); 450 451 return new Program(description, vertexShader.string(), fragmentShader.string()); 452 } 453 454 static inline size_t gradientIndex(const ProgramDescription& description) { 455 return description.gradientType * 2 + description.isSimpleGradient; 456 } 457 458 String8 ProgramCache::generateVertexShader(const ProgramDescription& description) { 459 // Add attributes 460 String8 shader(gVS_Header_Attributes); 461 if (description.hasTexture || description.hasExternalTexture) { 462 shader.append(gVS_Header_Attributes_TexCoords); 463 } 464 if (description.isAA) { 465 shader.append(gVS_Header_Attributes_AAVertexShapeParameters); 466 } 467 if (description.hasColors) { 468 shader.append(gVS_Header_Attributes_Colors); 469 } 470 // Uniforms 471 shader.append(gVS_Header_Uniforms); 472 if (description.hasTextureTransform) { 473 shader.append(gVS_Header_Uniforms_TextureTransform); 474 } 475 if (description.hasGradient) { 476 shader.append(gVS_Header_Uniforms_HasGradient); 477 } 478 if (description.hasBitmap) { 479 shader.append(gVS_Header_Uniforms_HasBitmap); 480 } 481 if (description.isPoint) { 482 shader.append(gVS_Header_Uniforms_IsPoint); 483 } 484 // Varyings 485 if (description.hasTexture || description.hasExternalTexture) { 486 shader.append(gVS_Header_Varyings_HasTexture); 487 } 488 if (description.isAA) { 489 shader.append(gVS_Header_Varyings_IsAAVertexShape); 490 } 491 if (description.hasColors) { 492 shader.append(gVS_Header_Varyings_HasColors); 493 } 494 if (description.hasGradient) { 495 shader.append(gVS_Header_Varyings_HasGradient[gradientIndex(description)]); 496 } 497 if (description.hasBitmap) { 498 shader.append(description.isPoint ? 499 gVS_Header_Varyings_PointHasBitmap : 500 gVS_Header_Varyings_HasBitmap); 501 } 502 503 // Begin the shader 504 shader.append(gVS_Main); { 505 if (description.hasTextureTransform) { 506 shader.append(gVS_Main_OutTransformedTexCoords); 507 } else if (description.hasTexture || description.hasExternalTexture) { 508 shader.append(gVS_Main_OutTexCoords); 509 } 510 if (description.isAA) { 511 shader.append(gVS_Main_AAVertexShape); 512 } 513 if (description.hasColors) { 514 shader.append(gVS_Main_OutColors); 515 } 516 if (description.hasBitmap) { 517 shader.append(description.isPoint ? 518 gVS_Main_OutPointBitmapTexCoords : 519 gVS_Main_OutBitmapTexCoords); 520 } 521 if (description.isPoint) { 522 shader.append(gVS_Main_PointSize); 523 } 524 // Output transformed position 525 shader.append(gVS_Main_Position); 526 if (description.hasGradient) { 527 shader.append(gVS_Main_OutGradient[gradientIndex(description)]); 528 } 529 } 530 // End the shader 531 shader.append(gVS_Footer); 532 533 PROGRAM_LOGD("*** Generated vertex shader:\n\n%s", shader.string()); 534 535 return shader; 536 } 537 538 static bool shaderOp(const ProgramDescription& description, String8& shader, 539 const int modulateOp, const char** snippets) { 540 int op = description.hasAlpha8Texture ? MODULATE_OP_MODULATE_A8 : modulateOp; 541 op = op * 2 + description.hasGammaCorrection; 542 shader.append(snippets[op]); 543 return description.hasAlpha8Texture; 544 } 545 546 String8 ProgramCache::generateFragmentShader(const ProgramDescription& description) { 547 String8 shader; 548 549 const bool blendFramebuffer = description.framebufferMode >= SkXfermode::kPlus_Mode; 550 if (blendFramebuffer) { 551 shader.append(gFS_Header_Extension_FramebufferFetch); 552 } 553 if (description.hasExternalTexture) { 554 shader.append(gFS_Header_Extension_ExternalTexture); 555 } 556 557 shader.append(gFS_Header); 558 559 // Varyings 560 if (description.hasTexture || description.hasExternalTexture) { 561 shader.append(gVS_Header_Varyings_HasTexture); 562 } 563 if (description.isAA) { 564 shader.append(gVS_Header_Varyings_IsAAVertexShape); 565 } 566 if (description.hasColors) { 567 shader.append(gVS_Header_Varyings_HasColors); 568 } 569 if (description.hasGradient) { 570 shader.append(gVS_Header_Varyings_HasGradient[gradientIndex(description)]); 571 } 572 if (description.hasBitmap) { 573 shader.append(description.isPoint ? 574 gVS_Header_Varyings_PointHasBitmap : 575 gVS_Header_Varyings_HasBitmap); 576 } 577 578 // Uniforms 579 int modulateOp = MODULATE_OP_NO_MODULATE; 580 const bool singleColor = !description.hasTexture && !description.hasExternalTexture && 581 !description.hasGradient && !description.hasBitmap; 582 583 if (description.modulate || singleColor) { 584 shader.append(gFS_Uniforms_Color); 585 if (!singleColor) modulateOp = MODULATE_OP_MODULATE; 586 } 587 if (description.hasTexture) { 588 shader.append(gFS_Uniforms_TextureSampler); 589 } else if (description.hasExternalTexture) { 590 shader.append(gFS_Uniforms_ExternalTextureSampler); 591 } 592 if (description.hasGradient) { 593 shader.appendFormat(gFS_Uniforms_GradientSampler[description.isSimpleGradient], 594 gFS_Uniforms_Dither); 595 } 596 if (description.hasBitmap && description.isPoint) { 597 shader.append(gFS_Header_Uniforms_PointHasBitmap); 598 } 599 if (description.hasGammaCorrection) { 600 shader.append(gFS_Uniforms_Gamma); 601 } 602 603 // Optimization for common cases 604 if (!description.isAA && !blendFramebuffer && !description.hasColors && 605 description.colorOp == ProgramDescription::kColorNone && 606 !description.isPoint && !description.hasDebugHighlight) { 607 bool fast = false; 608 609 const bool noShader = !description.hasGradient && !description.hasBitmap; 610 const bool singleTexture = (description.hasTexture || description.hasExternalTexture) && 611 !description.hasAlpha8Texture && noShader; 612 const bool singleA8Texture = description.hasTexture && 613 description.hasAlpha8Texture && noShader; 614 const bool singleGradient = !description.hasTexture && !description.hasExternalTexture && 615 description.hasGradient && !description.hasBitmap && 616 description.gradientType == ProgramDescription::kGradientLinear; 617 618 if (singleColor) { 619 shader.append(gFS_Fast_SingleColor); 620 fast = true; 621 } else if (singleTexture) { 622 if (!description.modulate) { 623 shader.append(gFS_Fast_SingleTexture); 624 } else { 625 shader.append(gFS_Fast_SingleModulateTexture); 626 } 627 fast = true; 628 } else if (singleA8Texture) { 629 if (!description.modulate) { 630 if (description.hasGammaCorrection) { 631 shader.append(gFS_Fast_SingleA8Texture_ApplyGamma); 632 } else { 633 shader.append(gFS_Fast_SingleA8Texture); 634 } 635 } else { 636 if (description.hasGammaCorrection) { 637 shader.append(gFS_Fast_SingleModulateA8Texture_ApplyGamma); 638 } else { 639 shader.append(gFS_Fast_SingleModulateA8Texture); 640 } 641 } 642 fast = true; 643 } else if (singleGradient) { 644 if (!description.modulate) { 645 shader.appendFormat(gFS_Fast_SingleGradient[description.isSimpleGradient], 646 gFS_Main_Dither[mHasES3]); 647 } else { 648 shader.appendFormat(gFS_Fast_SingleModulateGradient[description.isSimpleGradient], 649 gFS_Main_Dither[mHasES3]); 650 } 651 fast = true; 652 } 653 654 if (fast) { 655 #if DEBUG_PROGRAMS 656 PROGRAM_LOGD("*** Fast case:\n"); 657 PROGRAM_LOGD("*** Generated fragment shader:\n\n"); 658 printLongString(shader); 659 #endif 660 661 return shader; 662 } 663 } 664 665 if (description.hasBitmap) { 666 shader.append(gFS_Uniforms_BitmapSampler); 667 } 668 shader.append(gFS_Uniforms_ColorOp[description.colorOp]); 669 670 // Generate required functions 671 if (description.hasGradient && description.hasBitmap) { 672 generateBlend(shader, "blendShaders", description.shadersMode); 673 } 674 if (description.colorOp == ProgramDescription::kColorBlend) { 675 generateBlend(shader, "blendColors", description.colorMode); 676 } 677 if (blendFramebuffer) { 678 generateBlend(shader, "blendFramebuffer", description.framebufferMode); 679 } 680 if (description.isBitmapNpot) { 681 generateTextureWrap(shader, description.bitmapWrapS, description.bitmapWrapT); 682 } 683 684 // Begin the shader 685 shader.append(gFS_Main); { 686 // Stores the result in fragColor directly 687 if (description.hasTexture || description.hasExternalTexture) { 688 if (description.hasAlpha8Texture) { 689 if (!description.hasGradient && !description.hasBitmap) { 690 shader.append(gFS_Main_FetchA8Texture[modulateOp * 2 + 691 description.hasGammaCorrection]); 692 } 693 } else { 694 shader.append(gFS_Main_FetchTexture[modulateOp]); 695 } 696 } else { 697 if (!description.hasGradient && !description.hasBitmap) { 698 shader.append(gFS_Main_FetchColor); 699 } 700 } 701 if (description.hasGradient) { 702 shader.append(gFS_Main_FetchGradient[gradientIndex(description)]); 703 shader.appendFormat(gFS_Main_AddDitherToGradient, gFS_Main_Dither[mHasES3]); 704 } 705 if (description.hasBitmap) { 706 if (description.isPoint) { 707 shader.append(gFS_Main_PointBitmapTexCoords); 708 } 709 if (!description.isBitmapNpot) { 710 shader.append(gFS_Main_FetchBitmap); 711 } else { 712 shader.append(gFS_Main_FetchBitmapNpot); 713 } 714 } 715 bool applyModulate = false; 716 // Case when we have two shaders set 717 if (description.hasGradient && description.hasBitmap) { 718 if (description.isBitmapFirst) { 719 shader.append(gFS_Main_BlendShadersBG); 720 } else { 721 shader.append(gFS_Main_BlendShadersGB); 722 } 723 applyModulate = shaderOp(description, shader, modulateOp, 724 gFS_Main_BlendShaders_Modulate); 725 } else { 726 if (description.hasGradient) { 727 applyModulate = shaderOp(description, shader, modulateOp, 728 gFS_Main_GradientShader_Modulate); 729 } else if (description.hasBitmap) { 730 applyModulate = shaderOp(description, shader, modulateOp, 731 gFS_Main_BitmapShader_Modulate); 732 } 733 } 734 735 if (description.modulate && applyModulate) { 736 shader.append(gFS_Main_ModulateColor); 737 } 738 739 // Apply the color op if needed 740 shader.append(gFS_Main_ApplyColorOp[description.colorOp]); 741 742 if (description.isAA) { 743 shader.append(gFS_Main_AccountForAAVertexShape); 744 } 745 746 // Output the fragment 747 if (!blendFramebuffer) { 748 shader.append(gFS_Main_FragColor); 749 } else { 750 shader.append(!description.swapSrcDst ? 751 gFS_Main_FragColor_Blend : gFS_Main_FragColor_Blend_Swap); 752 } 753 if (description.hasColors) { 754 shader.append(gFS_Main_FragColor_HasColors); 755 } 756 if (description.hasDebugHighlight) { 757 shader.append(gFS_Main_DebugHighlight); 758 } 759 } 760 // End the shader 761 shader.append(gFS_Footer); 762 763 #if DEBUG_PROGRAMS 764 PROGRAM_LOGD("*** Generated fragment shader:\n\n"); 765 printLongString(shader); 766 #endif 767 768 return shader; 769 } 770 771 void ProgramCache::generateBlend(String8& shader, const char* name, SkXfermode::Mode mode) { 772 shader.append("\nvec4 "); 773 shader.append(name); 774 shader.append("(vec4 src, vec4 dst) {\n"); 775 shader.append(" "); 776 shader.append(gBlendOps[mode]); 777 shader.append("}\n"); 778 } 779 780 void ProgramCache::generateTextureWrap(String8& shader, GLenum wrapS, GLenum wrapT) { 781 shader.append("\nhighp vec2 wrap(highp vec2 texCoords) {\n"); 782 if (wrapS == GL_MIRRORED_REPEAT) { 783 shader.append(" highp float xMod2 = mod(texCoords.x, 2.0);\n"); 784 shader.append(" if (xMod2 > 1.0) xMod2 = 2.0 - xMod2;\n"); 785 } 786 if (wrapT == GL_MIRRORED_REPEAT) { 787 shader.append(" highp float yMod2 = mod(texCoords.y, 2.0);\n"); 788 shader.append(" if (yMod2 > 1.0) yMod2 = 2.0 - yMod2;\n"); 789 } 790 shader.append(" return vec2("); 791 switch (wrapS) { 792 case GL_CLAMP_TO_EDGE: 793 shader.append("texCoords.x"); 794 break; 795 case GL_REPEAT: 796 shader.append("mod(texCoords.x, 1.0)"); 797 break; 798 case GL_MIRRORED_REPEAT: 799 shader.append("xMod2"); 800 break; 801 } 802 shader.append(", "); 803 switch (wrapT) { 804 case GL_CLAMP_TO_EDGE: 805 shader.append("texCoords.y"); 806 break; 807 case GL_REPEAT: 808 shader.append("mod(texCoords.y, 1.0)"); 809 break; 810 case GL_MIRRORED_REPEAT: 811 shader.append("yMod2"); 812 break; 813 } 814 shader.append(");\n"); 815 shader.append("}\n"); 816 } 817 818 void ProgramCache::printLongString(const String8& shader) const { 819 ssize_t index = 0; 820 ssize_t lastIndex = 0; 821 const char* str = shader.string(); 822 while ((index = shader.find("\n", index)) > -1) { 823 String8 line(str, index - lastIndex); 824 if (line.length() == 0) line.append("\n"); 825 PROGRAM_LOGD("%s", line.string()); 826 index++; 827 str += (index - lastIndex); 828 lastIndex = index; 829 } 830 } 831 832 }; // namespace uirenderer 833 }; // namespace android 834
