android_view_GLES20Canvas.cpp revision b025b9c8b4efefadb01937db61a1f8ee7d2452bf
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 "jni.h" 20#include <nativehelper/JNIHelp.h> 21#include <android_runtime/AndroidRuntime.h> 22#include <utils/ResourceTypes.h> 23 24#include <SkBitmap.h> 25#include <SkCanvas.h> 26#include <SkMatrix.h> 27#include <SkPaint.h> 28#include <SkRegion.h> 29#include <SkScalerContext.h> 30#include <SkTemplates.h> 31#include <SkXfermode.h> 32 33#include <OpenGLRenderer.h> 34#include <SkiaShader.h> 35#include <SkiaColorFilter.h> 36#include <Rect.h> 37 38#include "TextLayout.h" 39 40namespace android { 41 42using namespace uirenderer; 43 44/** 45 * Note: OpenGLRenderer JNI layer is generated and compiled only on supported 46 * devices. This means all the logic must be compiled only when the 47 * preprocessor variable USE_OPENGL_RENDERER is defined. 48 */ 49#ifdef USE_OPENGL_RENDERER 50 51// ---------------------------------------------------------------------------- 52// Java APIs 53// ---------------------------------------------------------------------------- 54 55static struct { 56 jclass clazz; 57 jmethodID set; 58} gRectClassInfo; 59 60// ---------------------------------------------------------------------------- 61// Constructors 62// ---------------------------------------------------------------------------- 63 64static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) { 65 return new OpenGLRenderer; 66} 67 68static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas, 69 OpenGLRenderer* renderer) { 70 delete renderer; 71} 72 73// ---------------------------------------------------------------------------- 74// Setup 75// ---------------------------------------------------------------------------- 76 77static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas, 78 OpenGLRenderer* renderer, jint width, jint height) { 79 renderer->setViewport(width, height); 80} 81 82static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas, 83 OpenGLRenderer* renderer) { 84 renderer->prepare(); 85} 86 87static void android_view_GLES20Canvas_finish(JNIEnv* env, jobject canvas, 88 OpenGLRenderer* renderer) { 89 renderer->finish(); 90} 91 92static void android_view_GLES20Canvas_acquireContext(JNIEnv* env, jobject canvas, 93 OpenGLRenderer* renderer) { 94 renderer->acquireContext(); 95} 96 97static void android_view_GLES20Canvas_releaseContext(JNIEnv* env, jobject canvas, 98 OpenGLRenderer* renderer) { 99 renderer->releaseContext(); 100} 101 102// ---------------------------------------------------------------------------- 103// State 104// ---------------------------------------------------------------------------- 105 106static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer, 107 jint flags) { 108 return renderer->save(flags); 109} 110 111static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas, 112 OpenGLRenderer* renderer) { 113 return renderer->getSaveCount(); 114} 115 116static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas, 117 OpenGLRenderer* renderer) { 118 renderer->restore(); 119} 120 121static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas, 122 OpenGLRenderer* renderer, jint saveCount) { 123 renderer->restoreToCount(saveCount); 124} 125 126// ---------------------------------------------------------------------------- 127// Layers 128// ---------------------------------------------------------------------------- 129 130static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas, 131 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 132 SkPaint* paint, jint saveFlags) { 133 return renderer->saveLayer(left, top, right, bottom, paint, saveFlags); 134} 135 136static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas, 137 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 138 jint alpha, jint saveFlags) { 139 return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags); 140} 141 142// ---------------------------------------------------------------------------- 143// Clipping 144// ---------------------------------------------------------------------------- 145 146static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas, 147 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 148 SkCanvas::EdgeType edge) { 149 return renderer->quickReject(left, top, right, bottom); 150} 151 152static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas, 153 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 154 SkRegion::Op op) { 155 return renderer->clipRect(left, top, right, bottom, op); 156} 157 158static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas, 159 OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom, 160 SkRegion::Op op) { 161 return renderer->clipRect(float(left), float(top), float(right), float(bottom), op); 162} 163 164static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas, 165 OpenGLRenderer* renderer, jobject rect) { 166 const android::uirenderer::Rect& bounds(renderer->getClipBounds()); 167 168 env->CallVoidMethod(rect, gRectClassInfo.set, 169 int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom)); 170 171 return !bounds.isEmpty(); 172} 173 174// ---------------------------------------------------------------------------- 175// Transforms 176// ---------------------------------------------------------------------------- 177 178static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas, 179 OpenGLRenderer* renderer, jfloat dx, jfloat dy) { 180 renderer->translate(dx, dy); 181} 182 183static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas, 184 OpenGLRenderer* renderer, jfloat degrees) { 185 renderer->rotate(degrees); 186} 187 188static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas, 189 OpenGLRenderer* renderer, jfloat sx, jfloat sy) { 190 renderer->scale(sx, sy); 191} 192 193static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas, 194 OpenGLRenderer* renderer, SkMatrix* matrix) { 195 renderer->setMatrix(matrix); 196} 197 198static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas, 199 OpenGLRenderer* renderer, SkMatrix* matrix) { 200 renderer->getMatrix(matrix); 201} 202 203static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas, 204 OpenGLRenderer* renderer, SkMatrix* matrix) { 205 renderer->concatMatrix(matrix); 206} 207 208// ---------------------------------------------------------------------------- 209// Drawing 210// ---------------------------------------------------------------------------- 211 212static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas, 213 OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) { 214 renderer->drawBitmap(bitmap, left, top, paint); 215} 216 217static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas, 218 OpenGLRenderer* renderer, SkBitmap* bitmap, 219 float srcLeft, float srcTop, float srcRight, float srcBottom, 220 float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) { 221 renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom, 222 dstLeft, dstTop, dstRight, dstBottom, paint); 223} 224 225static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas, 226 OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) { 227 renderer->drawBitmap(bitmap, matrix, paint); 228} 229 230static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas, 231 OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks, 232 float left, float top, float right, float bottom, SkPaint* paint) { 233 jbyte* storage = env->GetByteArrayElements(chunks, NULL); 234 Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage); 235 Res_png_9patch::deserialize(patch); 236 237 renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint); 238 239 env->ReleaseByteArrayElements(chunks, storage, 0); 240} 241 242static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas, 243 OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) { 244 renderer->drawColor(color, mode); 245} 246 247static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas, 248 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 249 SkPaint* paint) { 250 renderer->drawRect(left, top, right, bottom, paint); 251} 252 253static void android_view_GLES20Canvas_drawRects(JNIEnv* env, jobject canvas, 254 OpenGLRenderer* renderer, SkRegion* region, SkPaint* paint) { 255 SkRegion::Iterator it(*region); 256 while (!it.done()) { 257 const SkIRect& r = it.rect(); 258 renderer->drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint); 259 it.next(); 260 } 261} 262 263static void android_view_GLES20Canvas_drawPath(JNIEnv* env, jobject canvas, 264 OpenGLRenderer* renderer, SkPath* path, SkPaint* paint) { 265 renderer->drawPath(path, paint); 266} 267 268// ---------------------------------------------------------------------------- 269// Shaders and color filters 270// ---------------------------------------------------------------------------- 271 272static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject canvas, 273 OpenGLRenderer* renderer) { 274 renderer->resetShader(); 275 renderer->resetColorFilter(); 276 renderer->resetShadow(); 277} 278 279static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas, 280 OpenGLRenderer* renderer, SkiaShader* shader) { 281 renderer->setupShader(shader); 282} 283 284static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject canvas, 285 OpenGLRenderer* renderer, SkiaColorFilter* filter) { 286 renderer->setupColorFilter(filter); 287} 288 289static void android_view_GLES20Canvas_setupShadow(JNIEnv* env, jobject canvas, 290 OpenGLRenderer* renderer, jfloat radius, jfloat dx, jfloat dy, jint color) { 291 renderer->setupShadow(radius, dx, dy, color); 292} 293 294// ---------------------------------------------------------------------------- 295// Text 296// ---------------------------------------------------------------------------- 297 298static void renderText(OpenGLRenderer* renderer, const jchar* text, int count, 299 jfloat x, jfloat y, int flags, SkPaint* paint) { 300 const jchar *workText; 301 jchar* buffer = NULL; 302 int32_t workBytes; 303 if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) { 304 renderer->drawText((const char*) workText, workBytes, count, x, y, paint); 305 free(buffer); 306 } 307} 308 309static void renderTextRun(OpenGLRenderer* renderer, const jchar* text, 310 jint start, jint count, jint contextCount, jfloat x, jfloat y, 311 int flags, SkPaint* paint) { 312 uint8_t rtl = flags & 0x1; 313 if (rtl) { 314 SkAutoSTMalloc<80, jchar> buffer(contextCount); 315 jchar* shaped = buffer.get(); 316 if (TextLayout::prepareRtlTextRun(text, start, count, contextCount, shaped)) { 317 renderer->drawText((const char*) shaped, count << 1, count, x, y, paint); 318 } else { 319 LOGW("drawTextRun error"); 320 } 321 } else { 322 renderer->drawText((const char*) (text + start), count << 1, count, x, y, paint); 323 } 324} 325 326static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas, 327 OpenGLRenderer* renderer, jcharArray text, int index, int count, 328 jfloat x, jfloat y, int flags, SkPaint* paint) { 329 jchar* textArray = env->GetCharArrayElements(text, NULL); 330 renderText(renderer, textArray + index, count, x, y, flags, paint); 331 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 332} 333 334static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas, 335 OpenGLRenderer* renderer, jstring text, int start, int end, 336 jfloat x, jfloat y, int flags, SkPaint* paint) { 337 const jchar* textArray = env->GetStringChars(text, NULL); 338 renderText(renderer, textArray + start, end - start, x, y, flags, paint); 339 env->ReleaseStringChars(text, textArray); 340} 341 342static void android_view_GLES20Canvas_drawTextRunArray(JNIEnv* env, jobject canvas, 343 OpenGLRenderer* renderer, jcharArray text, int index, int count, 344 int contextIndex, int contextCount, jfloat x, jfloat y, int dirFlags, 345 SkPaint* paint) { 346 jchar* textArray = env->GetCharArrayElements(text, NULL); 347 renderTextRun(renderer, textArray + contextIndex, index - contextIndex, 348 count, contextCount, x, y, dirFlags, paint); 349 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 350 } 351 352static void android_view_GLES20Canvas_drawTextRun(JNIEnv* env, jobject canvas, 353 OpenGLRenderer* renderer, jstring text, int start, int end, 354 int contextStart, int contextEnd, jfloat x, jfloat y, int dirFlags, 355 SkPaint* paint) { 356 const jchar* textArray = env->GetStringChars(text, NULL); 357 jint count = end - start; 358 jint contextCount = contextEnd - contextStart; 359 renderTextRun(renderer, textArray + contextStart, start - contextStart, 360 count, contextCount, x, y, dirFlags, paint); 361 env->ReleaseStringChars(text, textArray); 362} 363 364#endif // USE_OPENGL_RENDERER 365 366// ---------------------------------------------------------------------------- 367// Common 368// ---------------------------------------------------------------------------- 369 370static jboolean android_view_GLES20Canvas_isAvailable(JNIEnv* env, jobject clazz) { 371#ifdef USE_OPENGL_RENDERER 372 return JNI_TRUE; 373#else 374 return JNI_FALSE; 375#endif 376} 377 378// ---------------------------------------------------------------------------- 379// JNI Glue 380// ---------------------------------------------------------------------------- 381 382const char* const kClassPathName = "android/view/GLES20Canvas"; 383 384static JNINativeMethod gMethods[] = { 385 { "nIsAvailable", "()Z", (void*) android_view_GLES20Canvas_isAvailable }, 386 387#ifdef USE_OPENGL_RENDERER 388 { "nCreateRenderer", "()I", (void*) android_view_GLES20Canvas_createRenderer }, 389 { "nDestroyRenderer", "(I)V", (void*) android_view_GLES20Canvas_destroyRenderer }, 390 { "nSetViewport", "(III)V", (void*) android_view_GLES20Canvas_setViewport }, 391 { "nPrepare", "(I)V", (void*) android_view_GLES20Canvas_prepare }, 392 { "nFinish", "(I)V", (void*) android_view_GLES20Canvas_finish }, 393 { "nAcquireContext", "(I)V", (void*) android_view_GLES20Canvas_acquireContext }, 394 { "nReleaseContext", "(I)V", (void*) android_view_GLES20Canvas_releaseContext }, 395 396 { "nSave", "(II)I", (void*) android_view_GLES20Canvas_save }, 397 { "nRestore", "(I)V", (void*) android_view_GLES20Canvas_restore }, 398 { "nRestoreToCount", "(II)V", (void*) android_view_GLES20Canvas_restoreToCount }, 399 { "nGetSaveCount", "(I)I", (void*) android_view_GLES20Canvas_getSaveCount }, 400 401 { "nSaveLayer", "(IFFFFII)I", (void*) android_view_GLES20Canvas_saveLayer }, 402 { "nSaveLayerAlpha", "(IFFFFII)I", (void*) android_view_GLES20Canvas_saveLayerAlpha }, 403 404 { "nQuickReject", "(IFFFFI)Z", (void*) android_view_GLES20Canvas_quickReject }, 405 { "nClipRect", "(IFFFFI)Z", (void*) android_view_GLES20Canvas_clipRectF }, 406 { "nClipRect", "(IIIIII)Z", (void*) android_view_GLES20Canvas_clipRect }, 407 408 { "nTranslate", "(IFF)V", (void*) android_view_GLES20Canvas_translate }, 409 { "nRotate", "(IF)V", (void*) android_view_GLES20Canvas_rotate }, 410 { "nScale", "(IFF)V", (void*) android_view_GLES20Canvas_scale }, 411 412 { "nSetMatrix", "(II)V", (void*) android_view_GLES20Canvas_setMatrix }, 413 { "nGetMatrix", "(II)V", (void*) android_view_GLES20Canvas_getMatrix }, 414 { "nConcatMatrix", "(II)V", (void*) android_view_GLES20Canvas_concatMatrix }, 415 416 { "nDrawBitmap", "(IIFFI)V", (void*) android_view_GLES20Canvas_drawBitmap }, 417 { "nDrawBitmap", "(IIFFFFFFFFI)V", (void*) android_view_GLES20Canvas_drawBitmapRect }, 418 { "nDrawBitmap", "(IIII)V", (void*) android_view_GLES20Canvas_drawBitmapMatrix }, 419 { "nDrawPatch", "(II[BFFFFI)V", (void*) android_view_GLES20Canvas_drawPatch }, 420 { "nDrawColor", "(III)V", (void*) android_view_GLES20Canvas_drawColor }, 421 { "nDrawRect", "(IFFFFI)V", (void*) android_view_GLES20Canvas_drawRect }, 422 { "nDrawRects", "(III)V", (void*) android_view_GLES20Canvas_drawRects }, 423 { "nDrawPath", "(III)V", (void*) android_view_GLES20Canvas_drawPath }, 424 425 { "nResetModifiers", "(I)V", (void*) android_view_GLES20Canvas_resetModifiers }, 426 { "nSetupShader", "(II)V", (void*) android_view_GLES20Canvas_setupShader }, 427 { "nSetupColorFilter", "(II)V", (void*) android_view_GLES20Canvas_setupColorFilter }, 428 { "nSetupShadow", "(IFFFI)V", (void*) android_view_GLES20Canvas_setupShadow }, 429 430 { "nDrawText", "(I[CIIFFII)V", (void*) android_view_GLES20Canvas_drawTextArray }, 431 { "nDrawText", "(ILjava/lang/String;IIFFII)V", 432 (void*) android_view_GLES20Canvas_drawText }, 433 434 { "nDrawTextRun", "(I[CIIIIFFII)V", (void*) android_view_GLES20Canvas_drawTextRunArray }, 435 { "nDrawTextRun", "(ILjava/lang/String;IIIIFFII)V", 436 (void*) android_view_GLES20Canvas_drawTextRun }, 437 438 { "nGetClipBounds", "(ILandroid/graphics/Rect;)Z", 439 (void*) android_view_GLES20Canvas_getClipBounds }, 440#endif 441}; 442 443#ifdef USE_OPENGL_RENDERER 444 #define FIND_CLASS(var, className) \ 445 var = env->FindClass(className); \ 446 LOG_FATAL_IF(! var, "Unable to find class " className); \ 447 var = jclass(env->NewGlobalRef(var)); 448 449 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ 450 var = env->GetMethodID(clazz, methodName, methodDescriptor); \ 451 LOG_FATAL_IF(! var, "Unable to find method " methodName); 452#else 453 #define FIND_CLASS(var, className) 454 #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) 455#endif 456 457int register_android_view_GLES20Canvas(JNIEnv* env) { 458 FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect"); 459 GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V"); 460 461 return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods)); 462} 463 464}; 465