add boundary patch
diff --git a/core/jni/android/graphics/Canvas.cpp b/core/jni/android/graphics/Canvas.cpp
index dc72008..e1e9536 100644
--- a/core/jni/android/graphics/Canvas.cpp
+++ b/core/jni/android/graphics/Canvas.cpp
@@ -27,6 +27,9 @@
#include "SkShader.h"
#include "SkTemplates.h"
+#include "SkBoundaryPatch.h"
+#include "SkMeshUtils.h"
+
#define TIME_DRAWx
static uint32_t get_thread_msec() {
@@ -861,8 +864,6 @@
*matrix = canvas->getTotalMatrix();
}
};
-
-///////////////////////////////////////////////////////////////////////////////
static JNINativeMethod gCanvasMethods[] = {
{"finalizer", "(I)V", (void*) SkCanvasGlue::finalizer},
@@ -965,6 +966,42 @@
{"freeCaches", "()V", (void*) SkCanvasGlue::freeCaches}
};
+///////////////////////////////////////////////////////////////////////////////
+
+static void BoundaryPatch_computeCubic(JNIEnv* env, jobject, jfloatArray jpts,
+ int texW, int texH, int rows, int cols,
+ jfloatArray jverts, jshortArray jidx) {
+ AutoJavaFloatArray ptsArray(env, jpts, 24, kRO_JNIAccess);
+
+ int vertCount = rows * cols;
+ AutoJavaFloatArray vertsArray(env, jverts, vertCount * 4, kRW_JNIAccess);
+ SkPoint* verts = (SkPoint*)vertsArray.ptr();
+ SkPoint* texs = verts + vertCount;
+
+ int idxCount = (rows - 1) * (cols - 1) * 6;
+ AutoJavaShortArray idxArray(env, jidx, idxCount, kRW_JNIAccess);
+ uint16_t* idx = (uint16_t*)idxArray.ptr(); // cast from int16_t*
+
+ SkCubicBoundary cubic;
+ memcpy(cubic.fPts, ptsArray.ptr(), 12 * sizeof(SkPoint));
+
+ SkBoundaryPatch patch;
+ patch.setBoundary(&cubic);
+ // generate our verts
+ patch.evalPatch(verts, rows, cols);
+
+ SkMeshIndices mesh;
+ // generate our texs and idx
+ mesh.init(texs, idx, texW, texH, rows, cols);
+}
+
+static JNINativeMethod gBoundaryPatchMethods[] = {
+ {"nativeComputeCubicPatch", "([FIIII[F[S)V",
+ (void*)BoundaryPatch_computeCubic },
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
#include <android_runtime/AndroidRuntime.h>
#define REG(env, name, array) \
@@ -976,6 +1013,7 @@
int result;
REG(env, "android/graphics/Canvas", gCanvasMethods);
+ REG(env, "android/graphics/utils/BoundaryPatch", gBoundaryPatchMethods);
return result;
}
diff --git a/core/jni/android/graphics/Graphics.cpp b/core/jni/android/graphics/Graphics.cpp
index 2e0caed..01aad93 100644
--- a/core/jni/android/graphics/Graphics.cpp
+++ b/core/jni/android/graphics/Graphics.cpp
@@ -56,7 +56,7 @@
///////////////////////////////////////////////////////////////////////////////
AutoJavaFloatArray::AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
- int minLength)
+ int minLength, JNIAccess access)
: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
SkASSERT(env);
if (array) {
@@ -66,11 +66,12 @@
}
fPtr = env->GetFloatArrayElements(array, NULL);
}
+ fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
}
AutoJavaFloatArray::~AutoJavaFloatArray() {
if (fPtr) {
- fEnv->ReleaseFloatArrayElements(fArray, fPtr, 0);
+ fEnv->ReleaseFloatArrayElements(fArray, fPtr, fReleaseMode);
}
}
@@ -94,7 +95,7 @@
}
AutoJavaShortArray::AutoJavaShortArray(JNIEnv* env, jshortArray array,
- int minLength)
+ int minLength, JNIAccess access)
: fEnv(env), fArray(array), fPtr(NULL), fLen(0) {
SkASSERT(env);
if (array) {
@@ -104,11 +105,12 @@
}
fPtr = env->GetShortArrayElements(array, NULL);
}
+ fReleaseMode = (access == kRO_JNIAccess) ? JNI_ABORT : 0;
}
AutoJavaShortArray::~AutoJavaShortArray() {
if (fPtr) {
- fEnv->ReleaseShortArrayElements(fArray, fPtr, 0);
+ fEnv->ReleaseShortArrayElements(fArray, fPtr, fReleaseMode);
}
}
diff --git a/core/jni/android/graphics/GraphicsJNI.h b/core/jni/android/graphics/GraphicsJNI.h
index 7adadbc..fe24b05 100644
--- a/core/jni/android/graphics/GraphicsJNI.h
+++ b/core/jni/android/graphics/GraphicsJNI.h
@@ -80,9 +80,15 @@
bool fReportSizeToVM;
};
+enum JNIAccess {
+ kRO_JNIAccess,
+ kRW_JNIAccess
+};
+
class AutoJavaFloatArray {
public:
- AutoJavaFloatArray(JNIEnv* env, jfloatArray array, int minLength = 0);
+ AutoJavaFloatArray(JNIEnv* env, jfloatArray array,
+ int minLength = 0, JNIAccess = kRW_JNIAccess);
~AutoJavaFloatArray();
float* ptr() const { return fPtr; }
@@ -93,6 +99,7 @@
jfloatArray fArray;
float* fPtr;
int fLen;
+ int fReleaseMode;
};
class AutoJavaIntArray {
@@ -112,7 +119,8 @@
class AutoJavaShortArray {
public:
- AutoJavaShortArray(JNIEnv* env, jshortArray array, int minLength = 0);
+ AutoJavaShortArray(JNIEnv* env, jshortArray array,
+ int minLength = 0, JNIAccess = kRW_JNIAccess);
~AutoJavaShortArray();
jshort* ptr() const { return fPtr; }
@@ -123,6 +131,7 @@
jshortArray fArray;
jshort* fPtr;
int fLen;
+ int fReleaseMode;
};
class AutoJavaByteArray {
diff --git a/graphics/java/android/graphics/utils/BoundaryPatch.java b/graphics/java/android/graphics/utils/BoundaryPatch.java
new file mode 100644
index 0000000..1cd5e13
--- /dev/null
+++ b/graphics/java/android/graphics/utils/BoundaryPatch.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.graphics.utils;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Shader;
+import android.graphics.Xfermode;
+
+/**
+ * @hide
+ */
+public class BoundaryPatch {
+ private Paint mPaint;
+ private Bitmap mTexture;
+ private int mRows;
+ private int mCols;
+ private float[] mCubicPoints;
+ private boolean mDirty;
+ // these are the computed output of the native code
+ private float[] mVerts;
+ private short[] mIndices;
+
+ public BoundaryPatch() {
+ mRows = mCols = 2; // default minimum
+ mCubicPoints = new float[24];
+ mPaint = new Paint();
+ mPaint.setDither(true);
+ mPaint.setFilterBitmap(true);
+ mDirty = true;
+ }
+
+ /**
+ * Set the boundary to be 4 cubics. This takes a single array of floats,
+ * and picks up the 12 pairs starting at offset, and treats them as
+ * the x,y coordinates of the cubic control points. The points wrap around
+ * a patch, as follows. For documentation purposes, pts[i] will mean the
+ * x,y pair of floats, as if pts[] were an array of "points".
+ *
+ * Top: pts[0..3]
+ * Right: pts[3..6]
+ * Bottom: pts[6..9]
+ * Right: pts[9..11], pts[0]
+ *
+ * The coordinates are copied from the input array, so subsequent changes
+ * to pts[] will not be reflected in the boundary.
+ *
+ * @param pts The src array of x,y pairs for the boundary cubics
+ * @param offset The index into pts of the first pair
+ * @param rows The number of points across to approximate the boundary.
+ * Must be >= 2, though very large values may slow down drawing
+ * @param cols The number of points down to approximate the boundary.
+ * Must be >= 2, though very large values may slow down drawing
+ */
+ public void setCubicBoundary(float[] pts, int offset, int rows, int cols) {
+ if (rows < 2 || cols < 2) {
+ throw new RuntimeException("rows and cols must be >= 2");
+ }
+ System.arraycopy(pts, offset, mCubicPoints, 0, 24);
+ if (mRows != rows || mCols != cols) {
+ mRows = rows;
+ mCols = cols;
+ }
+ mDirty = true;
+ }
+
+ /**
+ * Reference a bitmap texture to be mapped onto the patch.
+ */
+ public void setTexture(Bitmap texture) {
+ if (mTexture != texture) {
+ if (mTexture == null ||
+ mTexture.getWidth() != texture.getWidth() ||
+ mTexture.getHeight() != texture.getHeight()) {
+ // need to recompute texture coordinates
+ mDirty = true;
+ }
+ mTexture = texture;
+ mPaint.setShader(new BitmapShader(texture,
+ Shader.TileMode.CLAMP,
+ Shader.TileMode.CLAMP));
+ }
+ }
+
+ /**
+ * Return the paint flags for the patch
+ */
+ public int getPaintFlags() {
+ return mPaint.getFlags();
+ }
+
+ /**
+ * Set the paint flags for the patch
+ */
+ public void setPaintFlags(int flags) {
+ mPaint.setFlags(flags);
+ }
+
+ /**
+ * Set the xfermode for the patch
+ */
+ public void setXfermode(Xfermode mode) {
+ mPaint.setXfermode(mode);
+ }
+
+ /**
+ * Set the alpha for the patch
+ */
+ public void setAlpha(int alpha) {
+ mPaint.setAlpha(alpha);
+ }
+
+ /**
+ * Draw the patch onto the canvas.
+ *
+ * setCubicBoundary() and setTexture() must be called before drawing.
+ */
+ public void draw(Canvas canvas) {
+ if (mDirty) {
+ buildCache();
+ mDirty = false;
+ }
+
+ // cut the count in half, since mVerts.length is really the length of
+ // the verts[] and tex[] arrays combined
+ // (tex[] are stored after verts[])
+ int vertCount = mVerts.length >> 1;
+ canvas.drawVertices(Canvas.VertexMode.TRIANGLES, vertCount,
+ mVerts, 0, mVerts, vertCount, null, 0,
+ mIndices, 0, mIndices.length,
+ mPaint);
+ }
+
+ private void buildCache() {
+ // we need mRows * mCols points, for verts and another set for textures
+ // so *2 for going from points -> floats, and *2 for verts and textures
+ int vertCount = mRows * mCols * 4;
+ if (mVerts == null || mVerts.length != vertCount) {
+ mVerts = new float[vertCount];
+ }
+
+ int indexCount = (mRows - 1) * (mCols - 1) * 6;
+ if (mIndices == null || mIndices.length != indexCount) {
+ mIndices = new short[indexCount];
+ }
+
+ nativeComputeCubicPatch(mCubicPoints,
+ mTexture.getWidth(), mTexture.getHeight(),
+ mRows, mCols, mVerts, mIndices);
+ }
+
+ private static native
+ void nativeComputeCubicPatch(float[] cubicPoints,
+ int texW, int texH, int rows, int cols,
+ float[] verts, short[] indices);
+}
+