android_view_GLES20Canvas.cpp revision db1938e0e6ef816e228c815adccebd5cb05f2aa8
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 <SkXfermode.h> 31 32#include <OpenGLRenderer.h> 33#include <SkiaShader.h> 34#include <SkiaColorFilter.h> 35#include <Rect.h> 36#include <ui/Rect.h> 37 38#include "TextLayout.h" 39 40namespace android { 41 42using namespace uirenderer; 43 44// ---------------------------------------------------------------------------- 45// Java APIs 46// ---------------------------------------------------------------------------- 47 48static struct { 49 jclass clazz; 50 jmethodID set; 51} gRectClassInfo; 52 53// ---------------------------------------------------------------------------- 54// Constructors 55// ---------------------------------------------------------------------------- 56 57static OpenGLRenderer* android_view_GLES20Canvas_createRenderer(JNIEnv* env, jobject canvas) { 58 return new OpenGLRenderer; 59} 60 61static void android_view_GLES20Canvas_destroyRenderer(JNIEnv* env, jobject canvas, 62 OpenGLRenderer* renderer) { 63 delete renderer; 64} 65 66// ---------------------------------------------------------------------------- 67// Setup 68// ---------------------------------------------------------------------------- 69 70static void android_view_GLES20Canvas_setViewport(JNIEnv* env, jobject canvas, 71 OpenGLRenderer* renderer, jint width, jint height) { 72 renderer->setViewport(width, height); 73} 74 75static void android_view_GLES20Canvas_prepare(JNIEnv* env, jobject canvas, 76 OpenGLRenderer* renderer) { 77 renderer->prepare(); 78} 79 80// ---------------------------------------------------------------------------- 81// State 82// ---------------------------------------------------------------------------- 83 84static jint android_view_GLES20Canvas_save(JNIEnv* env, jobject canvas, OpenGLRenderer* renderer, 85 jint flags) { 86 return renderer->save(flags); 87} 88 89static jint android_view_GLES20Canvas_getSaveCount(JNIEnv* env, jobject canvas, 90 OpenGLRenderer* renderer) { 91 return renderer->getSaveCount(); 92} 93 94static void android_view_GLES20Canvas_restore(JNIEnv* env, jobject canvas, 95 OpenGLRenderer* renderer) { 96 renderer->restore(); 97} 98 99static void android_view_GLES20Canvas_restoreToCount(JNIEnv* env, jobject canvas, 100 OpenGLRenderer* renderer, jint saveCount) { 101 renderer->restoreToCount(saveCount); 102} 103 104// ---------------------------------------------------------------------------- 105// Layers 106// ---------------------------------------------------------------------------- 107 108static jint android_view_GLES20Canvas_saveLayer(JNIEnv* env, jobject canvas, 109 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 110 SkPaint* paint, jint saveFlags) { 111 return renderer->saveLayer(left, top, right, bottom, paint, saveFlags); 112} 113 114static jint android_view_GLES20Canvas_saveLayerAlpha(JNIEnv* env, jobject canvas, 115 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 116 jint alpha, jint saveFlags) { 117 return renderer->saveLayerAlpha(left, top, right, bottom, alpha, saveFlags); 118} 119 120// ---------------------------------------------------------------------------- 121// Clipping 122// ---------------------------------------------------------------------------- 123 124static bool android_view_GLES20Canvas_quickReject(JNIEnv* env, jobject canvas, 125 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 126 SkCanvas::EdgeType edge) { 127 return renderer->quickReject(left, top, right, bottom); 128} 129 130static bool android_view_GLES20Canvas_clipRectF(JNIEnv* env, jobject canvas, 131 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 132 SkRegion::Op op) { 133 return renderer->clipRect(left, top, right, bottom, op); 134} 135 136static bool android_view_GLES20Canvas_clipRect(JNIEnv* env, jobject canvas, 137 OpenGLRenderer* renderer, jint left, jint top, jint right, jint bottom, 138 SkRegion::Op op) { 139 return renderer->clipRect(float(left), float(top), float(right), float(bottom), op); 140} 141 142static bool android_view_GLES20Canvas_getClipBounds(JNIEnv* env, jobject canvas, 143 OpenGLRenderer* renderer, jobject rect) { 144 const android::uirenderer::Rect& bounds(renderer->getClipBounds()); 145 146 env->CallVoidMethod(rect, gRectClassInfo.set, 147 int(bounds.left), int(bounds.top), int(bounds.right), int(bounds.bottom)); 148 149 return !bounds.isEmpty(); 150} 151 152// ---------------------------------------------------------------------------- 153// Transforms 154// ---------------------------------------------------------------------------- 155 156static void android_view_GLES20Canvas_translate(JNIEnv* env, jobject canvas, 157 OpenGLRenderer* renderer, jfloat dx, jfloat dy) { 158 renderer->translate(dx, dy); 159} 160 161static void android_view_GLES20Canvas_rotate(JNIEnv* env, jobject canvas, 162 OpenGLRenderer* renderer, jfloat degrees) { 163 renderer->rotate(degrees); 164} 165 166static void android_view_GLES20Canvas_scale(JNIEnv* env, jobject canvas, 167 OpenGLRenderer* renderer, jfloat sx, jfloat sy) { 168 renderer->scale(sx, sy); 169} 170 171static void android_view_GLES20Canvas_setMatrix(JNIEnv* env, jobject canvas, 172 OpenGLRenderer* renderer, SkMatrix* matrix) { 173 renderer->setMatrix(matrix); 174} 175 176static void android_view_GLES20Canvas_getMatrix(JNIEnv* env, jobject canvas, 177 OpenGLRenderer* renderer, SkMatrix* matrix) { 178 renderer->getMatrix(matrix); 179} 180 181static void android_view_GLES20Canvas_concatMatrix(JNIEnv* env, jobject canvas, 182 OpenGLRenderer* renderer, SkMatrix* matrix) { 183 renderer->concatMatrix(matrix); 184} 185 186// ---------------------------------------------------------------------------- 187// Drawing 188// ---------------------------------------------------------------------------- 189 190static void android_view_GLES20Canvas_drawBitmap(JNIEnv* env, jobject canvas, 191 OpenGLRenderer* renderer, SkBitmap* bitmap, float left, float top, SkPaint* paint) { 192 renderer->drawBitmap(bitmap, left, top, paint); 193} 194 195static void android_view_GLES20Canvas_drawBitmapRect(JNIEnv* env, jobject canvas, 196 OpenGLRenderer* renderer, SkBitmap* bitmap, 197 float srcLeft, float srcTop, float srcRight, float srcBottom, 198 float dstLeft, float dstTop, float dstRight, float dstBottom, SkPaint* paint) { 199 renderer->drawBitmap(bitmap, srcLeft, srcTop, srcRight, srcBottom, 200 dstLeft, dstTop, dstRight, dstBottom, paint); 201} 202 203static void android_view_GLES20Canvas_drawBitmapMatrix(JNIEnv* env, jobject canvas, 204 OpenGLRenderer* renderer, SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint) { 205 renderer->drawBitmap(bitmap, matrix, paint); 206} 207 208static void android_view_GLES20Canvas_drawPatch(JNIEnv* env, jobject canvas, 209 OpenGLRenderer* renderer, SkBitmap* bitmap, jbyteArray chunks, 210 float left, float top, float right, float bottom, SkPaint* paint) { 211 jbyte* storage = env->GetByteArrayElements(chunks, NULL); 212 Res_png_9patch* patch = reinterpret_cast<Res_png_9patch*>(storage); 213 Res_png_9patch::deserialize(patch); 214 215 renderer->drawPatch(bitmap, patch, left, top, right, bottom, paint); 216 217 env->ReleaseByteArrayElements(chunks, storage, 0); 218} 219 220static void android_view_GLES20Canvas_drawColor(JNIEnv* env, jobject canvas, 221 OpenGLRenderer* renderer, jint color, SkXfermode::Mode mode) { 222 renderer->drawColor(color, mode); 223} 224 225static void android_view_GLES20Canvas_drawRect(JNIEnv* env, jobject canvas, 226 OpenGLRenderer* renderer, jfloat left, jfloat top, jfloat right, jfloat bottom, 227 SkPaint* paint) { 228 renderer->drawRect(left, top, right, bottom, paint); 229} 230 231// ---------------------------------------------------------------------------- 232// Shaders and color filters 233// ---------------------------------------------------------------------------- 234 235static void android_view_GLES20Canvas_resetModifiers(JNIEnv* env, jobject canvas, 236 OpenGLRenderer* renderer) { 237 renderer->resetShader(); 238 renderer->resetColorFilter(); 239} 240 241static void android_view_GLES20Canvas_setupShader(JNIEnv* env, jobject canvas, 242 OpenGLRenderer* renderer, SkiaShader* shader) { 243 renderer->setupShader(shader); 244} 245 246static void android_view_GLES20Canvas_setupColorFilter(JNIEnv* env, jobject canvas, 247 OpenGLRenderer* renderer, SkiaColorFilter* filter) { 248 renderer->setupColorFilter(filter); 249} 250 251// ---------------------------------------------------------------------------- 252// Text 253// ---------------------------------------------------------------------------- 254 255static void renderText(OpenGLRenderer* renderer, const jchar* text, int count, 256 jfloat x, jfloat y, int flags, SkPaint* paint) { 257 const jchar *workText; 258 jchar* buffer = NULL; 259 int32_t workBytes; 260 if (TextLayout::prepareText(paint, text, count, flags, &workText, &workBytes, &buffer)) { 261 renderer->drawText((const char*) workText, workBytes, count, x, y, paint); 262 free(buffer); 263 } 264} 265 266static void android_view_GLES20Canvas_drawTextArray(JNIEnv* env, jobject canvas, 267 OpenGLRenderer* renderer, jcharArray text, int index, int count, 268 jfloat x, jfloat y, int flags, SkPaint* paint) { 269 jchar* textArray = env->GetCharArrayElements(text, NULL); 270 renderText(renderer, textArray + index, count, x, y, flags, paint); 271 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 272} 273 274static void android_view_GLES20Canvas_drawText(JNIEnv* env, jobject canvas, 275 OpenGLRenderer* renderer, jstring text, int start, int end, 276 jfloat x, jfloat y, int flags, SkPaint* paint) { 277 const jchar* textArray = env->GetStringChars(text, NULL); 278 renderText(renderer, textArray + start, end - start, x, y, flags, paint); 279 env->ReleaseStringChars(text, textArray); 280} 281 282// ---------------------------------------------------------------------------- 283// JNI Glue 284// ---------------------------------------------------------------------------- 285 286const char* const kClassPathName = "android/view/GLES20Canvas"; 287 288static JNINativeMethod gMethods[] = { 289 { "nCreateRenderer", "()I", (void*) android_view_GLES20Canvas_createRenderer }, 290 { "nDestroyRenderer", "(I)V", (void*) android_view_GLES20Canvas_destroyRenderer }, 291 { "nSetViewport", "(III)V", (void*) android_view_GLES20Canvas_setViewport }, 292 { "nPrepare", "(I)V", (void*) android_view_GLES20Canvas_prepare }, 293 294 { "nSave", "(II)I", (void*) android_view_GLES20Canvas_save }, 295 { "nRestore", "(I)V", (void*) android_view_GLES20Canvas_restore }, 296 { "nRestoreToCount", "(II)V", (void*) android_view_GLES20Canvas_restoreToCount }, 297 { "nGetSaveCount", "(I)I", (void*) android_view_GLES20Canvas_getSaveCount }, 298 299 { "nSaveLayer", "(IFFFFII)I", (void*) android_view_GLES20Canvas_saveLayer }, 300 { "nSaveLayerAlpha", "(IFFFFII)I", (void*) android_view_GLES20Canvas_saveLayerAlpha }, 301 302 { "nQuickReject", "(IFFFFI)Z", (void*) android_view_GLES20Canvas_quickReject }, 303 { "nClipRect", "(IFFFFI)Z", (void*) android_view_GLES20Canvas_clipRectF }, 304 { "nClipRect", "(IIIIII)Z", (void*) android_view_GLES20Canvas_clipRect }, 305 306 { "nTranslate", "(IFF)V", (void*) android_view_GLES20Canvas_translate }, 307 { "nRotate", "(IF)V", (void*) android_view_GLES20Canvas_rotate }, 308 { "nScale", "(IFF)V", (void*) android_view_GLES20Canvas_scale }, 309 310 { "nSetMatrix", "(II)V", (void*) android_view_GLES20Canvas_setMatrix }, 311 { "nGetMatrix", "(II)V", (void*) android_view_GLES20Canvas_getMatrix }, 312 { "nConcatMatrix", "(II)V", (void*) android_view_GLES20Canvas_concatMatrix }, 313 314 { "nDrawBitmap", "(IIFFI)V", (void*) android_view_GLES20Canvas_drawBitmap }, 315 { "nDrawBitmap", "(IIFFFFFFFFI)V", (void*) android_view_GLES20Canvas_drawBitmapRect }, 316 { "nDrawBitmap", "(IIII)V", (void*) android_view_GLES20Canvas_drawBitmapMatrix }, 317 { "nDrawPatch", "(II[BFFFFI)V", (void*) android_view_GLES20Canvas_drawPatch }, 318 { "nDrawColor", "(III)V", (void*) android_view_GLES20Canvas_drawColor }, 319 { "nDrawRect", "(IFFFFI)V", (void*) android_view_GLES20Canvas_drawRect }, 320 321 { "nResetModifiers", "(I)V", (void*) android_view_GLES20Canvas_resetModifiers }, 322 { "nSetupShader", "(II)V", (void*) android_view_GLES20Canvas_setupShader }, 323 { "nSetupColorFilter", "(II)V", (void*) android_view_GLES20Canvas_setupColorFilter }, 324 325 { "nDrawText", "(I[CIIFFII)V", (void*) android_view_GLES20Canvas_drawTextArray }, 326 { "nDrawText", "(ILjava/lang/String;IIFFII)V", 327 (void*) android_view_GLES20Canvas_drawText }, 328 329 { "nGetClipBounds", "(ILandroid/graphics/Rect;)Z", 330 (void*) android_view_GLES20Canvas_getClipBounds }, 331}; 332 333#define FIND_CLASS(var, className) \ 334 var = env->FindClass(className); \ 335 LOG_FATAL_IF(! var, "Unable to find class " className); \ 336 var = jclass(env->NewGlobalRef(var)); 337 338#define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ 339 var = env->GetMethodID(clazz, methodName, methodDescriptor); \ 340 LOG_FATAL_IF(! var, "Unable to find method " methodName); 341 342int register_android_view_GLES20Canvas(JNIEnv* env) { 343 FIND_CLASS(gRectClassInfo.clazz, "android/graphics/Rect"); 344 GET_METHOD_ID(gRectClassInfo.set, gRectClassInfo.clazz, "set", "(IIII)V"); 345 346 return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods)); 347} 348 349}; 350