--- /dev/null
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_BITMAP_H
+#define ANDROID_BITMAP_H
+
+#include <stdint.h>
+#include <jni.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ANDROID_BITMAP_RESUT_SUCCESS 0
+#define ANDROID_BITMAP_RESULT_BAD_PARAMETER -1
+#define ANDROID_BITMAP_RESULT_JNI_EXCEPTION -2
+#define ANDROID_BITMAP_RESULT_ALLOCATION_FAILED -3
+
+enum AndroidBitmapFormat {
+ ANDROID_BITMAP_FORMAT_NONE = 0,
+ ANDROID_BITMAP_FORMAT_RGBA_8888 = 1,
+ ANDROID_BITMAP_FORMAT_RGB_565 = 4,
+ ANDROID_BITMAP_FORMAT_RGBA_4444 = 7,
+ ANDROID_BITMAP_FORMAT_A_8 = 8,
+};
+
+typedef struct {
+ uint32_t width;
+ uint32_t height;
+ uint32_t stride;
+ int32_t format;
+ uint32_t flags; // 0 for now
+} AndroidBitmapInfo;
+
+/**
+ * Given a java bitmap object, fill out the AndroidBitmap struct for it.
+ * If the call fails, the info parameter will be ignored
+ */
+int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap,
+ AndroidBitmapInfo* info);
+
+/**
+ * Given a java bitmap object, attempt to lock the pixel address.
+ * Locking will ensure that the memory for the pixels will not move
+ * until the unlockPixels call, and ensure that, if the pixels had been
+ * previously purged, they will have been restored.
+ *
+ * If this call succeeds, it must be balanced by a call to
+ * AndroidBitmap_unlockPixels, after which time the address of the pixels should
+ * no longer be used.
+ *
+ * If this succeeds, *addrPtr will be set to the pixel address. If the call
+ * fails, addrPtr will be ignored.
+ */
+int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr);
+
+/**
+ * Call this to balanace a successful call to AndroidBitmap_lockPixels
+ */
+int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_BITMAP_H
+#define ANDROID_BITMAP_H
+
+#include <stdint.h>
+#include <jni.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ANDROID_BITMAP_RESUT_SUCCESS 0
+#define ANDROID_BITMAP_RESULT_BAD_PARAMETER -1
+#define ANDROID_BITMAP_RESULT_JNI_EXCEPTION -2
+#define ANDROID_BITMAP_RESULT_ALLOCATION_FAILED -3
+
+enum AndroidBitmapFormat {
+ ANDROID_BITMAP_FORMAT_NONE = 0,
+ ANDROID_BITMAP_FORMAT_RGBA_8888 = 1,
+ ANDROID_BITMAP_FORMAT_RGB_565 = 4,
+ ANDROID_BITMAP_FORMAT_RGBA_4444 = 7,
+ ANDROID_BITMAP_FORMAT_A_8 = 8,
+};
+
+typedef struct {
+ uint32_t width;
+ uint32_t height;
+ uint32_t stride;
+ int32_t format;
+ uint32_t flags; // 0 for now
+} AndroidBitmapInfo;
+
+/**
+ * Given a java bitmap object, fill out the AndroidBitmap struct for it.
+ * If the call fails, the info parameter will be ignored
+ */
+int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap,
+ AndroidBitmapInfo* info);
+
+/**
+ * Given a java bitmap object, attempt to lock the pixel address.
+ * Locking will ensure that the memory for the pixels will not move
+ * until the unlockPixels call, and ensure that, if the pixels had been
+ * previously purged, they will have been restored.
+ *
+ * If this call succeeds, it must be balanced by a call to
+ * AndroidBitmap_unlockPixels, after which time the address of the pixels should
+ * no longer be used.
+ *
+ * If this succeeds, *addrPtr will be set to the pixel address. If the call
+ * fails, addrPtr will be ignored.
+ */
+int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr);
+
+/**
+ * Call this to balanace a successful call to AndroidBitmap_lockPixels
+ */
+int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- /dev/null
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#include <jni.h>
+#include <time.h>
+#include <android/log.h>
+#include <android/bitmap.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define LOG_TAG "libplasma"
+#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
+#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
+
+/* Set to 1 to enable debug log traces. */
+#define DEBUG 0
+
+/* Set to 1 to optimize memory stores when generating plasma. */
+#define OPTIMIZE_WRITES 1
+
+/* Return current time in milliseconds */
+static double now_ms(void)
+{
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ return tv.tv_sec*1000. + tv.tv_usec/1000.;
+}
+
+/* We're going to perform computations for every pixel of the target
+ * bitmap. floating-point operations are very slow on ARMv5, and not
+ * too bad on ARMv7 with the exception of trigonometric functions.
+ *
+ * For better performance on all platforms, we're going to use fixed-point
+ * arithmetic and all kinds of tricks
+ */
+
+typedef int32_t Fixed;
+
+#define FIXED_BITS 16
+#define FIXED_ONE (1 << FIXED_BITS)
+#define FIXED_AVERAGE(x,y) (((x) + (y)) >> 1)
+
+#define FIXED_FROM_INT(x) ((x) << FIXED_BITS)
+#define FIXED_TO_INT(x) ((x) >> FIXED_BITS)
+
+#define FIXED_FROM_FLOAT(x) ((Fixed)((x)*FIXED_ONE))
+#define FIXED_TO_FLOAT(x) ((x)/(1.*FIXED_ONE))
+
+#define FIXED_MUL(x,y) (((int64_t)(x) * (y)) >> FIXED_BITS)
+#define FIXED_DIV(x,y) (((int64_t)(x) * FIXED_ONE) / (y))
+
+#define FIXED_DIV2(x) ((x) >> 1)
+#define FIXED_AVERAGE(x,y) (((x) + (y)) >> 1)
+
+#define FIXED_FRAC(x) ((x) & ((1 << FIXED_BITS)-1))
+#define FIXED_TRUNC(x) ((x) & ~((1 << FIXED_BITS)-1))
+
+#define FIXED_FROM_INT_FLOAT(x,f) (Fixed)((x)*(FIXED_ONE*(f)))
+
+typedef int32_t Angle;
+
+#define ANGLE_BITS 9
+
+#if ANGLE_BITS < 8
+# error ANGLE_BITS must be at least 8
+#endif
+
+#define ANGLE_2PI (1 << ANGLE_BITS)
+#define ANGLE_PI (1 << (ANGLE_BITS-1))
+#define ANGLE_PI2 (1 << (ANGLE_BITS-2))
+#define ANGLE_PI4 (1 << (ANGLE_BITS-3))
+
+#define ANGLE_FROM_FLOAT(x) (Angle)((x)*ANGLE_PI/M_PI)
+#define ANGLE_TO_FLOAT(x) ((x)*M_PI/ANGLE_PI)
+
+#if ANGLE_BITS <= FIXED_BITS
+# define ANGLE_FROM_FIXED(x) (Angle)((x) >> (FIXED_BITS - ANGLE_BITS))
+# define ANGLE_TO_FIXED(x) (Fixed)((x) << (FIXED_BITS - ANGLE_BITS))
+#else
+# define ANGLE_FROM_FIXED(x) (Angle)((x) << (ANGLE_BITS - FIXED_BITS))
+# define ANGLE_TO_FIXED(x) (Fixed)((x) >> (ANGLE_BITS - FIXED_BITS))
+#endif
+
+static Fixed angle_sin_tab[ANGLE_2PI+1];
+
+static void init_angles(void)
+{
+ int nn;
+ for (nn = 0; nn < ANGLE_2PI+1; nn++) {
+ double radians = nn*M_PI/ANGLE_PI;
+ angle_sin_tab[nn] = FIXED_FROM_FLOAT(sin(radians));
+ }
+}
+
+static __inline__ Fixed angle_sin( Angle a )
+{
+ return angle_sin_tab[(uint32_t)a & (ANGLE_2PI-1)];
+}
+
+static __inline__ Fixed angle_cos( Angle a )
+{
+ return angle_sin(a + ANGLE_PI2);
+}
+
+static __inline__ Fixed fixed_sin( Fixed f )
+{
+ return angle_sin(ANGLE_FROM_FIXED(f));
+}
+
+static __inline__ Fixed fixed_cos( Fixed f )
+{
+ return angle_cos(ANGLE_FROM_FIXED(f));
+}
+
+/* Color palette used for rendering the plasma */
+#define PALETTE_BITS 8
+#define PALETTE_SIZE (1 << PALETTE_BITS)
+
+#if PALETTE_BITS > FIXED_BITS
+# error PALETTE_BITS must be smaller than FIXED_BITS
+#endif
+
+static uint16_t palette[PALETTE_SIZE];
+
+static uint16_t make565(int red, int green, int blue)
+{
+ return (uint16_t)( ((red << 8) & 0xf800) |
+ ((green << 2) & 0x03e0) |
+ ((blue >> 3) & 0x001f) );
+}
+
+static void init_palette(void)
+{
+ int nn, mm = 0;
+ /* fun with colors */
+ for (nn = 0; nn < PALETTE_SIZE/4; nn++) {
+ int jj = (nn-mm)*4*255/PALETTE_SIZE;
+ palette[nn] = make565(255, jj, 255-jj);
+ }
+
+ for ( mm = nn; nn < PALETTE_SIZE/2; nn++ ) {
+ int jj = (nn-mm)*4*255/PALETTE_SIZE;
+ palette[nn] = make565(255-jj, 255, jj);
+ }
+
+ for ( mm = nn; nn < PALETTE_SIZE*3/4; nn++ ) {
+ int jj = (nn-mm)*4*255/PALETTE_SIZE;
+ palette[nn] = make565(0, 255-jj, 255);
+ }
+
+ for ( mm = nn; nn < PALETTE_SIZE; nn++ ) {
+ int jj = (nn-mm)*4*255/PALETTE_SIZE;
+ palette[nn] = make565(jj, 0, 255);
+ }
+}
+
+static __inline__ uint16_t palette_from_fixed( Fixed x )
+{
+ if (x < 0) x = -x;
+ if (x >= FIXED_ONE) x = FIXED_ONE-1;
+ int idx = FIXED_FRAC(x) >> (FIXED_BITS - PALETTE_BITS);
+ return palette[idx & (PALETTE_SIZE-1)];
+}
+
+/* Angles expressed as fixed point radians */
+
+static void init_tables(void)
+{
+ init_palette();
+ init_angles();
+}
+
+static void fill_plasma( AndroidBitmapInfo* info, void* pixels, double t )
+{
+ Fixed ft = FIXED_FROM_FLOAT(t/1000.);
+ Fixed yt1 = FIXED_FROM_FLOAT(t/1230.);
+ Fixed yt2 = yt1;
+ Fixed xt10 = FIXED_FROM_FLOAT(t/3000.);
+ Fixed xt20 = xt10;
+
+#define YT1_INCR FIXED_FROM_FLOAT(1/100.)
+#define YT2_INCR FIXED_FROM_FLOAT(1/163.)
+
+ int yy;
+ for (yy = 0; yy < info->height; yy++) {
+ uint16_t* line = (uint16_t*)pixels;
+ Fixed base = fixed_sin(yt1) + fixed_sin(yt2);
+ Fixed xt1 = xt10;
+ Fixed xt2 = xt20;
+
+ yt1 += YT1_INCR;
+ yt2 += YT2_INCR;
+
+#define XT1_INCR FIXED_FROM_FLOAT(1/173.)
+#define XT2_INCR FIXED_FROM_FLOAT(1/242.)
+
+#if OPTIMIZE_WRITES
+ /* optimize memory writes by generating one aligned 32-bit store
+ * for every pair of pixels.
+ */
+ uint16_t* line_end = line + info->width;
+
+ if (line < line_end) {
+ if (((uint32_t)line & 3) != 0) {
+ Fixed ii = base + fixed_sin(xt1) + fixed_sin(xt2);
+
+ xt1 += XT1_INCR;
+ xt2 += XT2_INCR;
+
+ line[0] = palette_from_fixed(ii >> 2);
+ line++;
+ }
+
+ while (line + 2 <= line_end) {
+ Fixed i1 = base + fixed_sin(xt1) + fixed_sin(xt2);
+ xt1 += XT1_INCR;
+ xt2 += XT2_INCR;
+
+ Fixed i2 = base + fixed_sin(xt1) + fixed_sin(xt2);
+ xt1 += XT1_INCR;
+ xt2 += XT2_INCR;
+
+ uint32_t pixel = ((uint32_t)palette_from_fixed(i1 >> 2) << 16) |
+ (uint32_t)palette_from_fixed(i2 >> 2);
+
+ ((uint32_t*)line)[0] = pixel;
+ line += 2;
+ }
+
+ if (line < line_end) {
+ Fixed ii = base + fixed_sin(xt1) + fixed_sin(xt2);
+ line[0] = palette_from_fixed(ii >> 2);
+ line++;
+ }
+ }
+#else /* !OPTIMIZE_WRITES */
+ int xx;
+ for (xx = 0; xx < info->width; xx++) {
+
+ Fixed ii = base + fixed_sin(xt1) + fixed_sin(xt2);
+
+ xt1 += XT1_INCR;
+ xt2 += XT2_INCR;
+
+ line[xx] = palette_from_fixed(ii / 4);
+ }
+#endif /* !OPTIMIZE_WRITES */
+
+ // go to next line
+ pixels = (char*)pixels + info->stride;
+ }
+}
+
+/* simple stats management */
+typedef struct {
+ double renderTime;
+ double frameTime;
+} FrameStats;
+
+#define MAX_FRAME_STATS 200
+#define MAX_PERIOD_MS 1500
+
+typedef struct {
+ double firstTime;
+ double lastTime;
+ double frameTime;
+
+ int firstFrame;
+ int numFrames;
+ FrameStats frames[ MAX_FRAME_STATS ];
+} Stats;
+
+static void
+stats_init( Stats* s )
+{
+ s->lastTime = now_ms();
+ s->firstTime = 0.;
+ s->firstFrame = 0;
+ s->numFrames = 0;
+}
+
+static void
+stats_startFrame( Stats* s )
+{
+ s->frameTime = now_ms();
+}
+
+static void
+stats_endFrame( Stats* s )
+{
+ double now = now_ms();
+ double renderTime = now - s->frameTime;
+ double frameTime = now - s->lastTime;
+ int nn;
+
+ if (now - s->firstTime >= MAX_PERIOD_MS) {
+ if (s->numFrames > 0) {
+ double minRender, maxRender, avgRender;
+ double minFrame, maxFrame, avgFrame;
+ int count;
+
+ nn = s->firstFrame;
+ minRender = maxRender = avgRender = s->frames[nn].renderTime;
+ minFrame = maxFrame = avgFrame = s->frames[nn].frameTime;
+ for (count = s->numFrames; count > 0; count-- ) {
+ nn += 1;
+ if (nn >= MAX_FRAME_STATS)
+ nn -= MAX_FRAME_STATS;
+ double render = s->frames[nn].renderTime;
+ if (render < minRender) minRender = render;
+ if (render > maxRender) maxRender = render;
+ double frame = s->frames[nn].frameTime;
+ if (frame < minFrame) minFrame = frame;
+ if (frame > maxFrame) maxFrame = frame;
+ avgRender += render;
+ avgFrame += frame;
+ }
+ avgRender /= s->numFrames;
+ avgFrame /= s->numFrames;
+
+ LOGI("frame/s (avg,min,max) = (%.1f,%.1f,%.1f) "
+ "render time ms (avg,min,max) = (%.1f,%.1f,%.1f)\n",
+ 1000./avgFrame, 1000./maxFrame, 1000./minFrame,
+ avgRender, minRender, maxRender);
+ }
+ s->numFrames = 0;
+ s->firstFrame = 0;
+ s->firstTime = now;
+ }
+
+ nn = s->firstFrame + s->numFrames;
+ if (nn >= MAX_FRAME_STATS)
+ nn -= MAX_FRAME_STATS;
+
+ s->frames[nn].renderTime = renderTime;
+ s->frames[nn].frameTime = frameTime;
+
+ if (s->numFrames < MAX_FRAME_STATS) {
+ s->numFrames += 1;
+ } else {
+ s->firstFrame += 1;
+ if (s->firstFrame >= MAX_FRAME_STATS)
+ s->firstFrame -= MAX_FRAME_STATS;
+ }
+
+ s->lastTime = now;
+}
+
+JNIEXPORT void JNICALL Java_com_example_plasma_PlasmaView_renderPlasma(JNIEnv * env, jobject obj, jobject bitmap, jlong time_ms)
+{
+ AndroidBitmapInfo info;
+ void* pixels;
+ int ret;
+ static Stats stats;
+ static int init;
+
+ if (!init) {
+ init_tables();
+ stats_init(&stats);
+ init = 1;
+ }
+
+ if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
+ LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
+ return;
+ }
+
+ if (info.format != ANDROID_BITMAP_FORMAT_RGB_565) {
+ LOGE("Bitmap format is not RGB_565 !");
+ return;
+ }
+
+ if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
+ LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
+ }
+
+ stats_startFrame(&stats);
+
+ /* Now fill the values with a nice little plasma */
+ fill_plasma(&info, pixels, time_ms );
+
+ AndroidBitmap_unlockPixels(env, bitmap);
+
+ stats_endFrame(&stats);
+}
--- /dev/null
+/*
+ * Copyright (C) 2010 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 com.example.plasma;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.content.Context;
+import android.view.View;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+
+public class Plasma extends Activity
+{
+ /** Called when the activity is first created. */
+ @Override
+ public void onCreate(Bundle savedInstanceState)
+ {
+ super.onCreate(savedInstanceState);
+ setContentView(new PlasmaView(this));
+ }
+
+ /* load our native library */
+ static {
+ System.loadLibrary("plasma");
+ }
+}
+
+class PlasmaView extends View {
+ private Bitmap mBitmap;
+ private long mStartTime;
+
+ /* implementend by libplasma.so */
+ private static native void renderPlasma(Bitmap bitmap, long time_ms);
+
+ public PlasmaView(Context context) {
+ super(context);
+
+ final int W = 200;
+ final int H = 200;
+
+ mBitmap = Bitmap.createBitmap(W, H, Bitmap.Config.RGB_565);
+ mStartTime = System.currentTimeMillis();
+ }
+
+ @Override protected void onDraw(Canvas canvas) {
+ //canvas.drawColor(0xFFCCCCCC);
+ renderPlasma(mBitmap, System.currentTimeMillis() - mStartTime);
+ canvas.drawBitmap(mBitmap, 0, 0, null);
+ // force a redraw, with a different time-based pattern.
+ invalidate();
+ }
+}
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