From 6604d423fde9bd13cda833f87b6a5c2b9ec3602d Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Fri, 22 Mar 2024 14:44:29 -0700 Subject: [PATCH] Added a test program for multiple mice --- test/CMakeLists.txt | 1 + test/testmanymouse.c | 368 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 369 insertions(+) create mode 100644 test/testmanymouse.c diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt index abf1ec22f..394a4ce84 100644 --- a/test/CMakeLists.txt +++ b/test/CMakeLists.txt @@ -422,6 +422,7 @@ add_sdl_test_executable(testoffscreen SOURCES testoffscreen.c) add_sdl_test_executable(testpopup SOURCES testpopup.c) add_sdl_test_executable(testdialog SOURCES testdialog.c) add_sdl_test_executable(testtime SOURCES testtime.c) +add_sdl_test_executable(testmanymouse SOURCES testmanymouse.c) if (HAVE_WAYLAND) # Set the GENERATED property on the protocol file, since it is first created at build time diff --git a/test/testmanymouse.c b/test/testmanymouse.c new file mode 100644 index 000000000..ec4dbce5d --- /dev/null +++ b/test/testmanymouse.c @@ -0,0 +1,368 @@ +/* + Copyright (C) 1997-2024 Sam Lantinga + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely. +*/ + +#include +#include + +/* Stolen from the mailing list */ +/* Creates a new mouse cursor from an XPM */ + +/* XPM */ +static const char *arrow[] = { + /* width height num_colors chars_per_pixel */ + " 32 32 3 1", + /* colors */ + "X c #000000", + ". c #ffffff", + " c None", + /* pixels */ + "X ", + "XX ", + "X.X ", + "X..X ", + "X...X ", + "X....X ", + "X.....X ", + "X......X ", + "X.......X ", + "X........X ", + "X.....XXXXX ", + "X..X..X ", + "X.X X..X ", + "XX X..X ", + "X X..X ", + " X..X ", + " X..X ", + " X..X ", + " XX ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + " ", + "0,0" +}; + +static SDLTest_CommonState *state; +static int done; + +#define PROP_CURSOR_TEXTURE "cursor_texture" +#define MAX_MICE 3 +#define CURSOR_SIZE 48.0f +#define MAX_TRAIL 500 +#define TRAIL_SIZE 8.0f + +static SDL_Color colors[] = { + { 0, 255, 255, 255 }, /* mouse 1, cyan */ + { 255, 0, 255, 255 }, /* mouse 2, magenta */ + { 255, 255, 0, 255 }, /* mouse 3, yellow */ +}; +SDL_COMPILE_TIME_ASSERT(colors, SDL_arraysize(colors) == MAX_MICE); + +typedef struct +{ + SDL_MouseID instance_id; + SDL_bool active; + Uint8 button_state; + SDL_FPoint position; + int trail_head; + int trail_length; + SDL_FPoint trail[MAX_TRAIL]; +} MouseState; + +static MouseState mice[MAX_MICE]; + +static SDL_Texture *CreateCursor(const char *image[], SDL_Renderer *renderer) +{ + SDL_Surface *surface; + SDL_Palette *palette; + SDL_Texture *texture; + int row; + + surface = SDL_CreateSurface(32, 32, SDL_PIXELFORMAT_INDEX8); + for (row = 0; row < surface->h; ++row) { + SDL_memcpy((Uint8 *)surface->pixels + row * surface->pitch, image[4 + row], surface->w); + } + + palette = SDL_CreatePalette(256); + if (!palette) { + SDL_DestroySurface(surface); + return NULL; + } + palette->colors['.'].r = 0xFF; + palette->colors['.'].g = 0xFF; + palette->colors['.'].b = 0xFF; + palette->colors['X'].r = 0x00; + palette->colors['X'].g = 0x00; + palette->colors['X'].b = 0x00; + SDL_SetSurfacePalette(surface, palette); + SDL_DestroyPalette(palette); + + SDL_SetSurfaceColorKey(surface, SDL_TRUE, ' '); + + texture = SDL_CreateTextureFromSurface(renderer, surface); + SDL_DestroySurface(surface); + return texture; +} + +static void HandleMouseAdded(SDL_MouseID instance_id) +{ + SDL_Window *window = state->windows[0]; + int i, w = 0, h = 0; + + SDL_GetWindowSize(window, &w, &h); + + for (i = 0; i < SDL_arraysize(mice); ++i) { + MouseState *mouse_state = &mice[i]; + if (!mouse_state->active) { + mouse_state->instance_id = instance_id; + mouse_state->active = SDL_TRUE; + mouse_state->position.x = w * 0.5f; + mouse_state->position.y = h * 0.5f; + return; + } + } +} + +static void HandleMouseRemoved(SDL_MouseID instance_id) +{ + int i; + + for (i = 0; i < SDL_arraysize(mice); ++i) { + MouseState *mouse_state = &mice[i]; + if (instance_id == mouse_state->instance_id) { + SDL_zerop(mouse_state); + return; + } + } +} + +static void ActivateMouse(SDL_MouseID instance_id) +{ + int i; + + for (i = 0; i < SDL_arraysize(mice); ++i) { + MouseState *mouse_state = &mice[i]; + if (mouse_state->active && instance_id == mouse_state->instance_id) { + return; + } + } + + HandleMouseAdded(instance_id); +} + +static void HandleMouseMotion(SDL_MouseMotionEvent *event) +{ + SDL_Window *window = state->windows[0]; + int i, w = 0, h = 0; + + if (event->which == 0) { + /* The system pointer, not a distinct mouse device */ + return; + } + + ActivateMouse(event->which); + + SDL_GetWindowSize(window, &w, &h); + + for (i = 0; i < SDL_arraysize(mice); ++i) { + MouseState *mouse_state = &mice[i]; + if (!mouse_state->active) { + continue; + } + if (event->which == mouse_state->instance_id) { + float x = (mouse_state->position.x + event->xrel); + float y = (mouse_state->position.y + event->yrel); + + x = SDL_clamp(x, 0.0f, (float)w); + y = SDL_clamp(y, 0.0f, (float)h); + + mouse_state->position.x = x; + mouse_state->position.y = y; + + if (mouse_state->button_state) { + /* Add a spot to the mouse trail */ + SDL_FPoint *spot = &mouse_state->trail[mouse_state->trail_head]; + spot->x = x - TRAIL_SIZE * 0.5f; + spot->y = y - TRAIL_SIZE * 0.5f; + if (mouse_state->trail_length < MAX_TRAIL) { + ++mouse_state->trail_length; + } + mouse_state->trail_head = (mouse_state->trail_head + 1) % MAX_TRAIL; + } + } + } +} + +static void HandleMouseButton(SDL_MouseButtonEvent *event) +{ + int i; + + if (event->which == 0) { + /* The system pointer, not a distinct mouse device */ + return; + } + + ActivateMouse(event->which); + + for (i = 0; i < SDL_arraysize(mice); ++i) { + MouseState *mouse_state = &mice[i]; + if (!mouse_state->active) { + continue; + } + if (event->which == mouse_state->instance_id) { + if (event->state) { + mouse_state->button_state |= SDL_BUTTON(event->button); + } else { + mouse_state->button_state &= ~SDL_BUTTON(event->button); + } + } + } +} + +static void DrawMouseState(SDL_Window *window, SDL_Renderer *renderer, MouseState *mouse_state, SDL_Texture *cursor, SDL_Color *color) +{ + SDL_FRect rect; + + if (!mouse_state->active) { + return; + } + + if (mouse_state->trail_length > 0) { + int i; + int spot = mouse_state->trail_head - mouse_state->trail_length; + if (spot < 0) { + spot += MAX_TRAIL; + } + + rect.w = TRAIL_SIZE; + rect.h = TRAIL_SIZE; + SDL_SetRenderDrawColor(renderer, color->r, color->g, color->b, color->a); + for (i = 0; i < mouse_state->trail_length; ++i) { + rect.x = mouse_state->trail[spot].x; + rect.y = mouse_state->trail[spot].y; + SDL_RenderFillRect(renderer, &rect); + spot = (spot + 1) % MAX_TRAIL; + } + } + + rect.x = mouse_state->position.x; + rect.y = mouse_state->position.y; + rect.w = CURSOR_SIZE; + rect.h = CURSOR_SIZE; + SDL_SetTextureColorMod(cursor, color->r, color->g, color->b); + SDL_RenderTexture(renderer, cursor, NULL, &rect); +} + +static void loop(void) +{ + int i, j; + SDL_Event event; + + /* Check for events */ + while (SDL_PollEvent(&event)) { + SDLTest_CommonEvent(state, &event, &done); + + switch (event.type) { + case SDL_EVENT_MOUSE_ADDED: + /* Wait for events before activating this mouse */ + break; + case SDL_EVENT_MOUSE_REMOVED: + HandleMouseRemoved(event.mdevice.which); + break; + case SDL_EVENT_MOUSE_MOTION: + HandleMouseMotion(&event.motion); + break; + case SDL_EVENT_MOUSE_BUTTON_DOWN: + case SDL_EVENT_MOUSE_BUTTON_UP: + HandleMouseButton(&event.button); + break; + default: + break; + } + } + + for (i = 0; i < state->num_windows; ++i) { + SDL_Window *window = state->windows[i]; + SDL_Renderer *renderer = state->renderers[i]; + SDL_Texture *cursor = (SDL_Texture *)SDL_GetProperty(SDL_GetRendererProperties(renderer), PROP_CURSOR_TEXTURE, NULL); + + SDL_SetRenderDrawColor(renderer, 128, 128, 128, 255); + SDL_RenderClear(renderer); + + for (j = 0; j < SDL_arraysize(mice); ++j) { + DrawMouseState(window, renderer, &mice[j], cursor, &colors[j]); + } + + SDL_RenderPresent(renderer); + } +} + +int main(int argc, char *argv[]) +{ + int i; + + /* Enable standard application logging */ + SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); + + /* Log all events, including mouse motion */ + SDL_SetHint(SDL_HINT_EVENT_LOGGING, "2"); + + /* Initialize test framework */ + state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO); + if (!state) { + return 1; + } + for (i = 1; i < argc;) { + int consumed; + + consumed = SDLTest_CommonArg(state, i); + if (consumed < 0) { + SDLTest_CommonLogUsage(state, argv[0], NULL); + SDLTest_CommonQuit(state); + return 1; + } + } + + if (!SDLTest_CommonInit(state)) { + SDLTest_CommonQuit(state); + return 2; + } + + /* Create the cursor textures */ + for (i = 0; i < state->num_windows; ++i) { + SDL_Renderer *renderer = state->renderers[i]; + + SDL_Texture *cursor = CreateCursor(arrow, renderer); + SDL_SetProperty(SDL_GetRendererProperties(renderer), PROP_CURSOR_TEXTURE, cursor); + } + + /* We only get mouse motion for distinct devices when relative mode is enabled */ + SDL_SetRelativeMouseMode(SDL_TRUE); + + /* Main render loop */ + done = 0; + while (!done) { + loop(); + } + + SDLTest_CommonQuit(state); + return 0; +}