Android Support (beta)

.gitignore

@@ -6,4 +6,9 @@ t2-output
 /linux
 /build
 /.history
-/xcode
+/xcode
+.gradle
+.idea
+.cxx
+build
+kk

README.md

@@ -233,8 +233,8 @@ unsigned            mfb_get_window_width(struct mfb_window *window);
 unsigned            mfb_get_window_height(struct mfb_window *window);
 int                 mfb_get_mouse_x(struct mfb_window *window);             // Last mouse pos X
 int                 mfb_get_mouse_y(struct mfb_window *window);             // Last mouse pos Y
+const uint8_t *     mfb_get_mouse_button_buffer(struct mfb_window *window); // One byte for every button. Press (1), Release 0. (up to 8 buttons)
 
-// Not working on Linux (X11 nor Wayland)
 void                mfb_get_monitor_scale(struct mfb_window *window, float *scale_x, float *scale_y)
 // [Deprecated] Use mfb_get_monitor_scale instead
 void                mfb_get_monitor_dpi(struct mfb_window *window, float *dpi_x, float *dpi_y)
@@ -288,7 +288,7 @@ For now, no multitouch is available.
     mfb_update_state state = mfb_update(g_window, g_buffer);
     if (state != STATE_OK) {
         free(g_buffer);
-        g_buffer = 0x0;
+        g_buffer  = 0x0;
         g_width   = 0;
         g_height  = 0;
     }
@@ -303,6 +303,53 @@ cd build
 cmake -G Xcode -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_DEPLOYMENT_TARGET=11.0 ..
 ```
 
+### Android (beta)
+
+Take a look at the example in tests/android. You need **Android Studio** to build and run it.
+
+**Functions:**
+
+Some of the MiniFB functions don't make sense on mobile.
+The available functions for Android are:
+
+```c
+struct mfb_window * mfb_open(const char *title, unsigned width, unsigned height);
+struct mfb_window * mfb_open_ex(const char *title, unsigned width, unsigned height, unsigned flags);    // flags ignored
+
+mfb_update_state    mfb_update(struct mfb_window *window, void *buffer);
+
+void                mfb_close(struct mfb_window *window);
+
+void                mfb_set_user_data(struct mfb_window *window, void *user_data);
+void *              mfb_get_user_data(struct mfb_window *window);
+
+bool                mfb_set_viewport(struct mfb_window *window, unsigned offset_x, unsigned offset_y, unsigned width, unsigned height);
+
+void                mfb_set_active_callback(struct mfb_window *window, mfb_active_func callback);
+void                mfb_set_mouse_button_callback(struct mfb_window *window, mfb_mouse_button_func callback);
+void                mfb_set_mouse_move_callback(struct mfb_window *window, mfb_mouse_move_func callback);
+void                mfb_set_resize_callback(struct mfb_window *window, mfb_resize_func callback);
+
+bool                mfb_is_window_active(struct mfb_window *window);
+unsigned            mfb_get_window_width(struct mfb_window *window);
+unsigned            mfb_get_window_height(struct mfb_window *window);
+int                 mfb_get_mouse_x(struct mfb_window *window);             // Last mouse pos X
+int                 mfb_get_mouse_y(struct mfb_window *window);             // Last mouse pos Y
+const uint8_t *     mfb_get_mouse_button_buffer(struct mfb_window *window); // One byte for every button. Press (1), Release 0. (up to 8 buttons)
+```
+
+Timers are also available.
+
+```c
+struct mfb_timer *  mfb_timer_create(void);
+void                mfb_timer_destroy(struct mfb_timer *tmr);
+void                mfb_timer_reset(struct mfb_timer *tmr);
+double              mfb_timer_now(struct mfb_timer *tmr);
+double              mfb_timer_delta(struct mfb_timer *tmr);
+double              mfb_timer_get_frequency(void);
+double              mfb_timer_get_resolution(void);
+```
+
 ### Windows
 
 If you use **CMake** the Visual Studio project will be generated (2015, 2017 and 2019 have been tested).

include/MiniFB_ios.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <MiniFB_enums.h>
+#include "MiniFB_enums.h"
 
 void user_implemented_init(struct mfb_window *window);
 

src/MiniFB_common.c

@@ -1,6 +1,6 @@
-#include "MiniFB.h"
+#include <MiniFB.h>
 #include "WindowData.h"
-#include <MiniFB_internal.h>
+#include "MiniFB_internal.h"
 
 //-------------------------------------
 short int g_keycodes[512] = { 0 };

src/MiniFB_timer.c

@@ -1,4 +1,4 @@
-#include "MiniFB.h"
+#include <MiniFB.h>
 #include "MiniFB_internal.h"
 #include <stdlib.h>
 

src/android/AndroidMiniFB.c

@@ -0,0 +1,473 @@
+#include <android_native_app_glue.h>
+#include <android/log.h>
+#include <jni.h>
+//--
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+//--
+#include <MiniFB.h>
+#include <WindowData.h>
+#include "WindowData_Android.h"
+
+#define  LOG_TAG    "MiniFB"
+#define  LOGV(...)  __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
+#define  LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,   LOG_TAG, __VA_ARGS__)
+#define  LOGI(...)  __android_log_print(ANDROID_LOG_INFO,    LOG_TAG, __VA_ARGS__)
+#define  LOGW(...)  __android_log_print(ANDROID_LOG_WARN,    LOG_TAG, __VA_ARGS__)
+#define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,   LOG_TAG, __VA_ARGS__)
+#define  LOGF(...)  __android_log_print(ANDROID_LOG_FATAL,   LOG_TAG, __VA_ARGS__)
+
+#define kCall(func, ...)    if(window_data && window_data->func) window_data->func((struct mfb_window *) window_data, __VA_ARGS__);
+
+#define kUnused(var)        (void) var;
+
+struct android_app  *gApplication;
+
+//-------------------------------------
+extern void
+stretch_image(uint32_t *srcImage, uint32_t srcX, uint32_t srcY, uint32_t srcWidth, uint32_t srcHeight, uint32_t srcPitch,
+              uint32_t *dstImage, uint32_t dstX, uint32_t dstY, uint32_t dstWidth, uint32_t dstHeight, uint32_t dstPitch);
+
+//-------------------------------------
+extern int
+main(int argc, char *argv[]);
+
+//-------------------------------------
+static void
+draw(SWindowData *window_data, ANativeWindow_Buffer *window_buffer) {
+    if(window_data == 0x0 || window_data->draw_buffer == 0x0 || window_buffer == 0x0)
+        return;
+
+    if((window_data->buffer_width == window_buffer->width) && (window_data->buffer_height == window_buffer->height)) {
+        if(window_data->buffer_stride == window_buffer->stride*4) {
+            memcpy(window_buffer->bits, window_data->draw_buffer, window_data->buffer_width * window_data->buffer_height * 4);
+        }
+        else {
+            uint8_t  *src = window_data->draw_buffer;
+            uint32_t *dst = window_buffer->bits;
+            for(uint32_t y=0; y<window_data->window_height; ++y) {
+                memcpy(dst, src, window_data->buffer_width * 4);
+                src += window_data->buffer_stride;
+                dst += window_buffer->stride;
+            }
+        }
+    }
+    else {
+        uint32_t *src = window_data->draw_buffer;
+        uint32_t *dst = window_buffer->bits;
+        stretch_image(
+                src, 0, 0, window_data->buffer_width, window_data->buffer_height, window_data->buffer_width,
+                dst, 0, 0, window_buffer->width,      window_buffer->height,      window_buffer->stride
+        );
+    }
+}
+
+//-------------------------------------
+static int32_t
+handle_input(struct android_app* app, AInputEvent* event) {
+    SWindowData *window_data = (SWindowData *) app->userData;
+    if (window_data->close) {
+        //destroy_window_data(window_data);
+        return 0;
+    }
+
+    SWindowData_Android *window_data_android = (SWindowData_Android *) window_data->specific;
+
+    int t = AInputEvent_getType(event);
+    int s = AInputEvent_getSource(event);
+    LOGV("Event: type= %d, source=%d", t, s);
+    if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) {
+    //if (AInputEvent_getSource(event) == AINPUT_SOURCE_TOUCHSCREEN) {
+        int action = AMotionEvent_getAction(event);
+        int type   = action & AMOTION_EVENT_ACTION_MASK;
+        switch(type) {
+            case AMOTION_EVENT_ACTION_POINTER_DOWN:
+            case AMOTION_EVENT_ACTION_POINTER_UP:
+                {
+                    int idx = (action & AMOTION_EVENT_ACTION_POINTER_INDEX_MASK) >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+                    int id  = AMotionEvent_getPointerId(event, idx);
+                    int x   = AMotionEvent_getX(event, idx);
+                    int y   = AMotionEvent_getY(event, idx);
+                    window_data->mouse_pos_x = x | (id << 28);
+                    window_data->mouse_pos_y = y | (id << 28);
+                    window_data->mouse_button_status[id & 0x07] = (action == AMOTION_EVENT_ACTION_POINTER_DOWN);
+                    kCall(mouse_btn_func, id, 0, action == AMOTION_EVENT_ACTION_POINTER_DOWN);
+                }
+                break;
+
+            case AMOTION_EVENT_ACTION_DOWN:
+            case AMOTION_EVENT_ACTION_UP:
+                {
+                    int count = AMotionEvent_getPointerCount(event);
+                    for(int i=0; i < count; ++i) {
+                        int id = AMotionEvent_getPointerId(event, i);
+                        int x  = AMotionEvent_getX(event, i);
+                        int y  = AMotionEvent_getY(event, i);
+                        window_data->mouse_pos_x = x | (id << 28);
+                        window_data->mouse_pos_y = y | (id << 28);
+                        window_data->mouse_button_status[id & 0x07] = (action == AMOTION_EVENT_ACTION_POINTER_DOWN);
+                        kCall(mouse_btn_func, id, 0, action == AMOTION_EVENT_ACTION_DOWN);
+                    }
+                }
+                break;
+
+            case AMOTION_EVENT_ACTION_MOVE:
+                {
+                    int count = AMotionEvent_getPointerCount(event);
+                    for(int i=0; i < count; ++i){
+                        int id = AMotionEvent_getPointerId(event, i);
+                        int x  = AMotionEvent_getX(event, i);
+                        int y  = AMotionEvent_getY(event, i);
+                        window_data->mouse_pos_x = x | (id << 28);
+                        window_data->mouse_pos_y = y | (id << 28);
+                        window_data->mouse_button_status[id & 0x07] = true;
+                        kCall(mouse_move_func, window_data->mouse_pos_x, window_data->mouse_pos_y);
+                    }
+                }
+                break;
+
+            default:
+                LOGV("Touch: event: action=%x, source=%x, type=%d", action, s, t);
+                break;
+        }
+
+        if(window_data != 0x0) {
+            window_data->is_active = true;
+        }
+        return 1;
+    }
+    else
+    if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_KEY) {
+        LOGV("Key event: action=%d keyCode=%d metaState=0x%x",
+                AKeyEvent_getAction(event),
+                AKeyEvent_getKeyCode(event),
+                AKeyEvent_getMetaState(event));
+    }
+
+    return 0;
+}
+
+//-------------------------------------
+static void
+handle_cmd(struct android_app* app, int32_t cmd) {
+    static int32_t  format = WINDOW_FORMAT_RGBX_8888;
+    static int      sCurrentState = -1;
+
+    sCurrentState = cmd;
+
+    SWindowData         *window_data;
+    SWindowData_Android *window_data_android;
+
+    window_data = (SWindowData *) app->userData;
+    if(window_data != 0x0) {
+        window_data_android = (SWindowData_Android *) window_data->specific;
+    }
+
+    LOGV("cmd: %d", cmd);
+    // Init: 10, 11, 0, 1, 3, 5, 4, 6
+    //   START, RESUME, INPUT_CHANGED, INIT_WINDOW, WINDOW_RESIZED, CONTENT_RECT_CHANGED, WINDOW_REDRAW_NEEDED, GAINED_FOCUS
+    // Pause: 13, 7, 2, 14, 12
+    //   PAUSE, LOST_FOCUS, TERM_WINDOW, STOP, SAVE_STATE
+    // Resume: 10, 11, 1, 3, 4, 6
+    //   START, RESUME, INIT_WINDOW, WINDOW_RESIZED, WINDOW_REDRAW_NEEDED, GAINED_FOCUS
+    // Close: 0, 15
+    //   INPUT_CHANGED, DESTROY
+    // Lower the shutter: 7, 0
+    //   LOST_FOCUS, INPUT_CHANGED
+    // Raising the shutter: 6, 1
+    //   GAINED_FOCUS, INIT_WINDOW
+    // Rotate: 13, 2, 14, 12, 0, 15, 10, 11, 0, 1, 3, 5, 4, 6, 4
+    //   PAUSE, TERM_WINDOW, STOP, SAVE_STATE, (similar to Pause but LOST_FOCUS)
+    //   INPUT_CHANGED, DESTROY, (like Close)
+    //   START, RESUME, INPUT_CHANGED, INIT_WINDOW, WINDOW_RESIZED, CONTENT_RECT_CHANGED, WINDOW_REDRAW_NEEDED, GAINED_FOCUS (like Init)
+    switch (cmd) {
+        // The app's activity has been started.
+        case APP_CMD_START:
+            break;
+
+            // The app's activity has been resumed.
+        case APP_CMD_RESUME:
+            break;
+
+            // The AInputQueue has changed.
+            // Upon processing this command, android_app->inputQueue will be updated to the new queue (or NULL).
+        case APP_CMD_INPUT_CHANGED:
+            break;
+
+            // A new ANativeWindow is ready for use.
+            // Upon receiving this command, android_app->window will contain the new window surface.
+        case APP_CMD_INIT_WINDOW:
+            if (app->window != NULL) {
+                format = ANativeWindow_getFormat(app->window);
+                ANativeWindow_setBuffersGeometry(app->window,
+                                                 ANativeWindow_getWidth(app->window),
+                                                 ANativeWindow_getHeight(app->window),
+                                                 format
+                );
+                //engine_draw_frame(window_data_android);
+            }
+            break;
+
+            // The current ANativeWindow has been resized. Please redraw with its new size.
+        case APP_CMD_WINDOW_RESIZED:
+            break;
+
+            // The content area of the window has changed, such as from the soft input window being shown or hidden.
+            // You can find the new content rect in android_app::contentRect.
+        case APP_CMD_CONTENT_RECT_CHANGED:
+            if(window_data_android != 0x0) {
+                // This does not work
+                //int32_t width  = window_data_android->app->contentRect.right  - window_data_android->app->contentRect.left;
+                //int32_t height = window_data_android->app->contentRect.bottom - window_data_android->app->contentRect.top;
+                // TODO: Check the DPI?
+                if(window_data != 0x0) {
+                    window_data->window_width  = ANativeWindow_getWidth(app->window);
+                    window_data->window_height = ANativeWindow_getHeight(app->window);
+                    kCall(resize_func, window_data->window_width, window_data->window_height);
+                }
+            }
+            break;
+
+            // The system needs that the current ANativeWindow be redrawn.
+            // You should redraw the window before handing this to android_app_exec_cmd() in order to avoid transient drawing glitches.
+        case APP_CMD_WINDOW_REDRAW_NEEDED:
+            break;
+
+            // The app's activity window has gained input focus.
+        case APP_CMD_GAINED_FOCUS:
+            if(window_data != 0x0) {
+                window_data->is_active = true;
+            }
+            kCall(active_func, true);
+            break;
+
+            // The app's activity has been paused.
+        case APP_CMD_PAUSE:
+            break;
+
+            // The app's activity window has lost input focus.
+        case APP_CMD_LOST_FOCUS:
+            if(window_data != 0x0) {
+                window_data->is_active = true;
+                //engine_draw_frame(window_data_android);
+            }
+            kCall(active_func, false);
+            break;
+
+            // The existing ANativeWindow needs to be terminated.
+            // Upon receiving this command, android_app->window still contains the existing window;
+            // after calling android_app_exec_cmd it will be set to NULL.
+        case APP_CMD_TERM_WINDOW:
+            if(window_data != 0x0) {
+                window_data->is_active = false;
+            }
+            ANativeWindow_setBuffersGeometry(app->window,
+                                             ANativeWindow_getWidth(app->window),
+                                             ANativeWindow_getHeight(app->window),
+                                             format
+            );
+            break;
+
+            // The app's activity has been stopped.
+        case APP_CMD_STOP:
+            break;
+
+            // The app should generate a new saved state for itself, to restore from later if needed.
+            // If you have saved state, allocate it with malloc and place it in android_app.savedState with
+            // the size in android_app.savedStateSize.
+            // The will be freed for you later.
+        case APP_CMD_SAVE_STATE:
+            break;
+
+            // The app's activity is being destroyed, and waiting for the app thread to clean up and exit before proceeding.
+        case APP_CMD_DESTROY:
+            if(window_data != 0x0) {
+                window_data->close = true;
+            }
+            break;
+
+            // The system is running low on memory. Try to reduce your memory use.
+        case APP_CMD_LOW_MEMORY:
+            break;
+
+            // The current device configuration has changed.
+        case APP_CMD_CONFIG_CHANGED:
+            break;
+    }
+}
+
+//-------------------------------------
+void
+android_main(struct android_app* app) {
+    app->onAppCmd     = handle_cmd;
+    app->onInputEvent = handle_input;
+    gApplication = app;
+
+    // Read all pending events.
+    int ident;
+    int events;
+    struct android_poll_source* source;
+    while(app->window == 0x0) {
+        while ((ident = ALooper_pollAll(0, NULL, &events, (void **) &source)) >= 0) {
+            // Process this event.
+            if (source != NULL) {
+                source->process(app, source);
+            }
+
+            // Check if we are exiting.
+            if (app->destroyRequested != 0) {
+                LOGD("Engine thread destroy requested!");
+                return;
+            }
+        }
+    }
+
+    char cwd[1024];
+    getcwd(cwd, sizeof(cwd));
+    char *argv[] = {
+            cwd,
+            (char *) app
+    };
+    main(2, argv);
+}
+
+//-------------------------------------
+struct mfb_window *
+mfb_open_ex(const char *title, unsigned width, unsigned height, unsigned flags) {
+    kUnused(title);
+    kUnused(flags);
+
+    SWindowData *window_data = malloc(sizeof(SWindowData));
+    if (window_data == 0x0) {
+        return 0x0;
+    }
+    memset(window_data, 0, sizeof(SWindowData));
+
+    SWindowData_Android *window_data_android = malloc(sizeof(SWindowData_Android));
+    if(window_data_android == 0x0) {
+        free(window_data);
+        return 0x0;
+    }
+    memset(window_data_android, 0, sizeof(SWindowData_Android));
+    window_data->specific = window_data_android;
+
+    window_data->is_active         = true;
+    window_data_android->app       = gApplication;
+    window_data_android->timer     = mfb_timer_create();
+
+    window_data->buffer_width  = width;
+    window_data->buffer_height = height;
+    window_data->buffer_stride = width * 4;
+
+    gApplication->userData = window_data;
+    if(gApplication->window != 0x0) {
+        window_data->window_width  = ANativeWindow_getWidth(gApplication->window);
+        window_data->window_height = ANativeWindow_getHeight(gApplication->window);
+    }
+
+    window_data->is_initialized = true;
+    return (struct mfb_window *) window_data;
+}
+
+//-------------------------------------
+mfb_update_state
+mfb_update_ex(struct mfb_window *window, void *buffer, unsigned width, unsigned height) {
+    if (window == 0x0) {
+        return STATE_INVALID_WINDOW;
+    }
+
+    SWindowData *window_data = (SWindowData *) window;
+    if (window_data->close) {
+        //destroy_window_data(window_data);
+        return STATE_EXIT;
+    }
+
+    if (buffer == 0x0) {
+        return STATE_INVALID_BUFFER;
+    }
+
+    window_data->draw_buffer   = buffer;
+    window_data->buffer_width  = width;
+    window_data->buffer_stride = width * 4;
+    window_data->buffer_height = height;
+
+    SWindowData_Android *window_data_android = (SWindowData_Android *) window_data->specific;
+
+    ANativeWindow_Buffer native_buffer;
+    if (ANativeWindow_lock(window_data_android->app->window, &native_buffer, NULL) < 0) {
+        LOGE("Unable to lock window buffer");
+        return STATE_INTERNAL_ERROR;
+    }
+
+    draw(window_data, &native_buffer);
+
+    ANativeWindow_unlockAndPost(window_data_android->app->window);
+
+    return STATE_OK;
+}
+
+//-------------------------------------
+extern double   g_time_for_frame;
+
+bool
+mfb_wait_sync(struct mfb_window *window) {
+    if (window == 0x0) {
+        return false;
+    }
+
+    SWindowData *window_data = (SWindowData *) window;
+    if (window_data->close) {
+        //destroy_window_data(window_data);
+        return false;
+    }
+
+    SWindowData_Android *window_data_android = (SWindowData_Android *) window_data->specific;
+
+    // Read all pending events.
+    int                         ident;
+    int                         events;
+    struct android_poll_source  *source;
+    double                      current;
+
+    while(1) {
+        // If not animating, we will block forever waiting for events.
+        // If animating, we loop until all events are read, then continue
+        // to draw the next frame of animation.
+        while ((ident = ALooper_pollAll(window_data->is_active ? 0 : -1, NULL, &events, (void **) &source)) >= 0) {
+            // Process this event.
+            if (source != NULL) {
+                source->process(window_data_android->app, source);
+            }
+
+            // Check if we are exiting.
+            if (window_data_android->app->destroyRequested != 0) {
+                LOGD("Engine thread destroy requested!");
+                window_data->is_active = false;
+                window_data->close = true;
+                return false;
+            }
+        }
+
+        current = mfb_timer_now(window_data_android->timer);
+        if (current >= g_time_for_frame) {
+            break;
+        }
+    }
+    mfb_timer_reset(window_data_android->timer);
+
+    return true;
+}
+
+//-------------------------------------
+void
+mfb_get_monitor_scale(struct mfb_window *window, float *scale_x, float *scale_y) {
+    kUnused(window);
+
+    if(scale_x != 0x0) {
+        *scale_x = 1.0f;
+    }
+    if(scale_y != 0x0) {
+        *scale_y = 1.0f;
+    }
+}

src/android/WindowData_Android.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <MiniFB_internal.h>
+
+//-------------------------------------
+typedef struct {
+    struct android_app  *app;
+    struct mfb_timer    *timer;
+} SWindowData_Android;

src/x11/X11MiniFB.c

@@ -438,7 +438,7 @@ extern bool     g_use_hardware_sync;
 bool
 mfb_wait_sync(struct mfb_window *window) {
     if (window == 0x0) {
-        return STATE_INVALID_WINDOW;
+        return false;
     }
 
     SWindowData *window_data = (SWindowData *) window;

tests/android/.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

tests/android/app/build.gradle

@@ -0,0 +1,26 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 30
+    ndkVersion '22.1.7171670'
+
+    defaultConfig {
+        applicationId 'com.example.noise'
+        minSdkVersion 14
+        targetSdkVersion 29
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+    externalNativeBuild {
+        cmake {
+            version '3.18.1'
+            path 'src/main/cpp/CMakeLists.txt'
+        }
+    }
+}

tests/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.minifb.noise"
+          android:versionCode="1"
+          android:versionName="1.0">
+  <application
+      android:allowBackup="false"
+      android:fullBackupContent="false"
+      android:icon="@mipmap/ic_launcher"
+      android:label="@string/app_name"
+      android:hasCode="false">
+    <activity android:name="android.app.NativeActivity"
+              android:label="@string/app_name">
+      <meta-data android:name="android.app.lib_name"
+                 android:value="noise" />
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+  </application>
+</manifest>

tests/android/app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,68 @@
+cmake_minimum_required(VERSION 3.18.1)
+project(noise)
+
+# Set our flags
+#--------------------------------------
+#add_compile_options("$<$<CONFIG:Debug>:-g>")
+#add_compile_options("$<IF:$<CONFIG:Debug>,-O0,-O2>")
+#if(APPLE)
+#    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -pedantic -Wno-switch -Wno-unused-function -Wno-implicit-fallthrough")
+#else()
+#    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -pedantic -Wno-switch -Wno-unused-function -Wno-implicit-fallthrough -Wno-cast-function-type")
+#endif()
+#set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS}")
+#set(CMAKE_OBJC_FLAGS "${CMAKE_C_FLAGS}")
+#set(CMAKE_OBJCXX_FLAGS "${CMAKE_CXX_FLAGS}")
+
+# build native_app_glue as a static lib
+add_library(native_app_glue STATIC
+    ${ANDROID_NDK}/sources/android/native_app_glue/android_native_app_glue.c
+)
+
+add_library(minifb STATIC
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../include/MiniFB.h
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../include/MiniFB_cpp.h
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../include/MiniFB_enums.h
+
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/MiniFB_common.c
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/MiniFB_cpp.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/MiniFB_internal.c
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/MiniFB_internal.h
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/MiniFB_timer.c
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/MiniFB_linux.c
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/WindowData.h
+
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/android/AndroidMiniFB.c
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src/android/WindowData_Android.h
+)
+
+target_include_directories(minifb PRIVATE
+    ${ANDROID_NDK}/sources/android/native_app_glue
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../include
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../src
+)
+
+# now build app's shared lib
+add_library(noise SHARED
+    noise.c
+)
+
+target_include_directories(noise PRIVATE
+    ${ANDROID_NDK}/sources/android/native_app_glue
+    ${CMAKE_CURRENT_LIST_DIR}/../../../../../../include
+)
+
+# Export ANativeActivity_onCreate(),
+# Refer to: https://github.com/android-ndk/ndk/issues/381.
+set(CMAKE_SHARED_LINKER_FLAGS
+    "${CMAKE_SHARED_LINKER_FLAGS} -u ANativeActivity_onCreate"
+)
+
+# add lib dependencies
+target_link_libraries(noise
+    android
+    minifb
+    native_app_glue
+    log
+    m
+)

tests/android/app/src/main/cpp/noise.c

@@ -0,0 +1,149 @@
+#include <android_native_app_glue.h>
+#include <android/log.h>
+#include <MiniFB.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define  LOG_TAG    "Noise"
+#define  LOGV(...)  __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
+#define  LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,   LOG_TAG, __VA_ARGS__)
+#define  LOGI(...)  __android_log_print(ANDROID_LOG_INFO,    LOG_TAG, __VA_ARGS__)
+#define  LOGW(...)  __android_log_print(ANDROID_LOG_WARN,    LOG_TAG, __VA_ARGS__)
+#define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,   LOG_TAG, __VA_ARGS__)
+#define  LOGF(...)  __android_log_print(ANDROID_LOG_FATAL,   LOG_TAG, __VA_ARGS__)
+
+#define kUnused(var)        (void) var;
+
+#define kTouchIdMask    0xf0000000
+#define kTouchPosMask   0x0fffffff
+#define kTouchIdShift   28
+
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+
+typedef struct {
+    bool    enabled;
+    int     x, y;
+} Pos;
+
+static uint32_t  g_width  = 200;
+static uint32_t  g_height = 100;
+static uint32_t *g_buffer = 0x0;
+static Pos      g_positions[16] = {};
+
+void
+active(struct mfb_window *window, bool isActive) {
+    LOGI("active: %d", isActive);
+}
+
+void
+resize(struct mfb_window *window, int width, int height) {
+    LOGI("resize: %d, %d", width, height);
+    g_width  = (width  >> 1);
+    g_height = (height >> 1);
+    g_buffer = realloc(g_buffer, g_width * g_height * 4);
+}
+
+void
+keyboard(struct mfb_window *window, mfb_key key, mfb_key_mod mod, bool isPressed) {
+    LOGI("keyboard:");
+}
+
+void
+char_input(struct mfb_window *window, unsigned int charCode) {
+    LOGI("char_input:");
+}
+
+void
+mouse_btn(struct mfb_window *window, mfb_mouse_button button, mfb_key_mod mod, bool isPressed) {
+    int x = (mfb_get_mouse_x(window) & kTouchPosMask) >> 1;
+    int y = (mfb_get_mouse_y(window) & kTouchPosMask) >> 1;
+    g_positions[button].enabled = isPressed;
+    g_positions[button].x = x;
+    g_positions[button].y = y;
+    LOGI("mouse_btn: button: id %d=%d, x=%d, y=%d", (int)button, (int) isPressed, x, y);
+}
+
+void
+mouse_move(struct mfb_window *window, int x, int y) {
+    int id = (x & kTouchIdMask) >> kTouchIdShift;
+    x = (x & kTouchPosMask) >> 1;
+    y = (y & kTouchPosMask) >> 1;
+    g_positions[id].enabled = true;
+    g_positions[id].x = x;
+    g_positions[id].y = y;
+    LOGI("mouse_move: %d, %d [%d]", x, y, id);
+}
+
+void
+mouse_scroll(struct mfb_window *window, mfb_key_mod mod, float deltaX, float deltaY) {
+    LOGI("mouse_scroll:");
+}
+
+// I'm not sure that we can use this function name but it works
+//-------------------------------------
+int
+main(int argc, char *argv[]) {
+    kUnused(argc);
+    kUnused(argv);
+    uint32_t    i, noise, carry, seed = 0xbeef;
+
+    struct mfb_window *window = mfb_open("Ignored", g_width, g_height);
+    if(window == 0x0)
+        return 0;
+
+    mfb_set_active_callback(window, active);
+    mfb_set_resize_callback(window, resize);
+    mfb_set_keyboard_callback(window, keyboard);            // not working
+    mfb_set_char_input_callback(window, char_input);        // not working
+    mfb_set_mouse_button_callback(window, mouse_btn);
+    mfb_set_mouse_move_callback(window, mouse_move);
+    mfb_set_mouse_scroll_callback(window, mouse_scroll);    // not working
+
+    g_buffer = (uint32_t *) malloc(g_width * g_height * 4);
+
+    mfb_update_state state;
+    do {
+        bool isActive   = mfb_is_window_active(window);
+        unsigned width  = mfb_get_window_width(window);
+        unsigned height = mfb_get_window_height(window);
+        int mouseX      = mfb_get_mouse_x(window);
+        int mouseY      = mfb_get_mouse_y(window);
+        float scrollX   = mfb_get_mouse_scroll_x(window);   // not working
+        float scrollY   = mfb_get_mouse_scroll_y(window);   // not working
+        const uint8_t *buttons = mfb_get_mouse_button_buffer(window);
+        const uint8_t *keys = mfb_get_key_buffer(window);   // not working
+
+        for (i = 0; i < g_width * g_height; ++i) {
+            noise = seed;
+            noise >>= 3;
+            noise ^= seed;
+            carry = noise & 1;
+            noise >>= 1;
+            seed >>= 1;
+            seed |= (carry << 30);
+            noise &= 0xFF;
+            g_buffer[i] = MFB_RGB(noise, noise, noise);
+        }
+
+        for (int p = 0; p < 16; ++p) {
+            if (g_positions[p].enabled) {
+                int minX = MAX(g_positions[p].x - 16, 0);
+                int maxX = MIN(g_positions[p].x + 16, g_width);
+                int minY = MAX(g_positions[p].y - 16, 0);
+                int maxY = MIN(g_positions[p].y + 16, g_height);
+                for(int y=minY; y<maxY; ++y) {
+                    i = y * g_width + minX;
+                    for(int x=minX; x<maxX; ++x) {
+                        g_buffer[i++] = 0;
+                    }
+                }
+            }
+        }
+
+        state = mfb_update_ex(window, g_buffer, g_width, g_height);
+        if (state != STATE_OK) {
+            window = 0x0;
+            break;
+        }
+    } while(mfb_wait_sync(window));}

tests/android/app/src/main/res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Noise</string>
+</resources>

tests/android/build.gradle

@@ -0,0 +1,17 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+       google()
+       mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.2.2'
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}

tests/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

tests/android/gradlew

@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

tests/android/gradlew.bat

@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

tests/android/settings.gradle

@@ -0,0 +1 @@
+include ':app'