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This commit is contained in:
Nitload
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_VIDEO_DRIVER_ANDROID
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#include "SDL_androidmouse.h"
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#include "../../events/SDL_mouse_c.h"
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#include "../../core/android/SDL_android.h"
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// See Android's MotionEvent class for constants
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#define ACTION_DOWN 0
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#define ACTION_UP 1
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#define ACTION_MOVE 2
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#define ACTION_HOVER_MOVE 7
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#define ACTION_SCROLL 8
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#define BUTTON_PRIMARY 1
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#define BUTTON_SECONDARY 2
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#define BUTTON_TERTIARY 4
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#define BUTTON_BACK 8
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#define BUTTON_FORWARD 16
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struct SDL_CursorData
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{
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int custom_cursor;
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int system_cursor;
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};
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// Last known Android mouse button state (includes all buttons)
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static int last_state;
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// Blank cursor
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static SDL_Cursor *empty_cursor;
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static SDL_Cursor *Android_WrapCursor(int custom_cursor, int system_cursor)
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{
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SDL_Cursor *cursor;
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cursor = SDL_calloc(1, sizeof(*cursor));
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if (cursor) {
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SDL_CursorData *data = (SDL_CursorData *)SDL_calloc(1, sizeof(*data));
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if (data) {
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data->custom_cursor = custom_cursor;
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data->system_cursor = system_cursor;
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cursor->internal = data;
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} else {
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SDL_free(cursor);
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cursor = NULL;
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}
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}
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return cursor;
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}
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static SDL_Cursor *Android_CreateDefaultCursor(void)
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{
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SDL_SystemCursor id = SDL_GetDefaultSystemCursor();
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return Android_WrapCursor(0, id);
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}
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static SDL_Cursor *Android_CreateCursor(SDL_Surface *surface, int hot_x, int hot_y)
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{
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int custom_cursor;
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SDL_Surface *converted;
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converted = SDL_ConvertSurface(surface, SDL_PIXELFORMAT_ARGB8888);
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if (!converted) {
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return NULL;
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}
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custom_cursor = Android_JNI_CreateCustomCursor(converted, hot_x, hot_y);
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SDL_DestroySurface(converted);
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if (!custom_cursor) {
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SDL_Unsupported();
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return NULL;
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}
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return Android_WrapCursor(custom_cursor, 0);
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}
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static SDL_Cursor *Android_CreateSystemCursor(SDL_SystemCursor id)
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{
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return Android_WrapCursor(0, id);
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}
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static void Android_FreeCursor(SDL_Cursor *cursor)
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{
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SDL_CursorData *data = cursor->internal;
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if (data->custom_cursor != 0) {
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Android_JNI_DestroyCustomCursor(data->custom_cursor);
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}
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SDL_free(cursor->internal);
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SDL_free(cursor);
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}
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static SDL_Cursor *Android_CreateEmptyCursor(void)
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{
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if (!empty_cursor) {
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SDL_Surface *empty_surface = SDL_CreateSurface(1, 1, SDL_PIXELFORMAT_ARGB8888);
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if (empty_surface) {
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SDL_memset(empty_surface->pixels, 0, (size_t)empty_surface->h * empty_surface->pitch);
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empty_cursor = Android_CreateCursor(empty_surface, 0, 0);
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SDL_DestroySurface(empty_surface);
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}
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}
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return empty_cursor;
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}
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static void Android_DestroyEmptyCursor(void)
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{
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if (empty_cursor) {
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Android_FreeCursor(empty_cursor);
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empty_cursor = NULL;
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}
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}
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static bool Android_ShowCursor(SDL_Cursor *cursor)
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{
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if (!cursor) {
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cursor = Android_CreateEmptyCursor();
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}
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if (cursor) {
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SDL_CursorData *data = cursor->internal;
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if (data->custom_cursor) {
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if (!Android_JNI_SetCustomCursor(data->custom_cursor)) {
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return SDL_Unsupported();
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}
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} else {
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if (!Android_JNI_SetSystemCursor(data->system_cursor)) {
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return SDL_Unsupported();
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}
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}
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return true;
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} else {
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// SDL error set inside Android_CreateEmptyCursor()
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return false;
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}
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}
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static bool Android_SetRelativeMouseMode(bool enabled)
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{
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if (!Android_JNI_SupportsRelativeMouse()) {
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return SDL_Unsupported();
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}
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if (!Android_JNI_SetRelativeMouseEnabled(enabled)) {
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return SDL_Unsupported();
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}
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return true;
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}
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void Android_InitMouse(void)
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{
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SDL_Mouse *mouse = SDL_GetMouse();
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mouse->CreateCursor = Android_CreateCursor;
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mouse->CreateSystemCursor = Android_CreateSystemCursor;
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mouse->ShowCursor = Android_ShowCursor;
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mouse->FreeCursor = Android_FreeCursor;
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mouse->SetRelativeMouseMode = Android_SetRelativeMouseMode;
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SDL_SetDefaultCursor(Android_CreateDefaultCursor());
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last_state = 0;
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}
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void Android_QuitMouse(void)
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{
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Android_DestroyEmptyCursor();
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}
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// Translate Android mouse button state to SDL mouse button
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static Uint8 TranslateButton(int state)
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{
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if (state & BUTTON_PRIMARY) {
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return SDL_BUTTON_LEFT;
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} else if (state & BUTTON_SECONDARY) {
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return SDL_BUTTON_RIGHT;
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} else if (state & BUTTON_TERTIARY) {
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return SDL_BUTTON_MIDDLE;
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} else if (state & BUTTON_FORWARD) {
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return SDL_BUTTON_X1;
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} else if (state & BUTTON_BACK) {
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return SDL_BUTTON_X2;
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} else {
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return 0;
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}
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}
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void Android_OnMouse(SDL_Window *window, int state, int action, float x, float y, bool relative)
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{
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int changes;
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Uint8 button;
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if (!window) {
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return;
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}
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switch (action) {
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case ACTION_DOWN:
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changes = state & ~last_state;
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button = TranslateButton(changes);
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last_state = state;
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SDL_SendMouseMotion(0, window, SDL_DEFAULT_MOUSE_ID, relative, x, y);
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SDL_SendMouseButton(0, window, SDL_DEFAULT_MOUSE_ID, button, true);
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break;
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case ACTION_UP:
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changes = last_state & ~state;
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button = TranslateButton(changes);
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last_state = state;
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SDL_SendMouseMotion(0, window, SDL_DEFAULT_MOUSE_ID, relative, x, y);
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SDL_SendMouseButton(0, window, SDL_DEFAULT_MOUSE_ID, button, false);
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break;
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case ACTION_MOVE:
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case ACTION_HOVER_MOVE:
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SDL_SendMouseMotion(0, window, SDL_DEFAULT_MOUSE_ID, relative, x, y);
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break;
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case ACTION_SCROLL:
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SDL_SendMouseWheel(0, window, SDL_DEFAULT_MOUSE_ID, x, y, SDL_MOUSEWHEEL_NORMAL);
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break;
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default:
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break;
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}
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}
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#endif // SDL_VIDEO_DRIVER_ANDROID
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