Added hotplug joystick support and simplified game controller API, courtesy of Alfred Reynolds
This commit is contained in:
Sam Lantinga
parent
2a4a81ad63
commit
34b88dfaae
30 changed files with 4191 additions and 580 deletions
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@ -17,10 +17,14 @@
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#include <string.h>
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#include "SDL.h"
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#include "common.h"
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static CommonState *state;
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static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE;
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#ifdef __IPHONEOS__
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#define SCREEN_WIDTH 320
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#define SCREEN_HEIGHT 480
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#else
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#define SCREEN_WIDTH 640
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#define SCREEN_HEIGHT 480
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#endif
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#define MAX_NUM_AXES 6
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#define MAX_NUM_HATS 2
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@ -37,16 +41,35 @@ WatchJoystick(SDL_Joystick * joystick)
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{
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SDL_Window *window = NULL;
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SDL_Renderer *screen = NULL;
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SDL_Rect viewport;
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SDL_Event event;
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const char *name = NULL;
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int done = 0;
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SDL_Event event;
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int i;
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/* Create a window to display joystick axis position */
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window = SDL_CreateWindow("Joystick Test", SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,
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SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
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if (window == NULL) {
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fprintf(stderr, "Couldn't create window: %s\n", SDL_GetError());
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return;
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}
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screen = SDL_CreateRenderer(window, -1, 0);
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if (screen == NULL) {
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fprintf(stderr, "Couldn't create renderer: %s\n", SDL_GetError());
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SDL_DestroyWindow(window);
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return;
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}
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SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);
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SDL_RenderClear(screen);
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SDL_RenderPresent(screen);
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SDL_RaiseWindow(window);
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/* Print info about the joystick we are watching */
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name = SDL_JoystickName(SDL_JoystickIndex(joystick));
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printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick),
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name = SDL_JoystickName(joystick);
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printf("Watching joystick %d: (%s)\n", SDL_JoystickInstanceID(joystick),
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name ? name : "Unknown Joystick");
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printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n",
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SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick),
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@ -54,6 +77,10 @@ WatchJoystick(SDL_Joystick * joystick)
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/* Loop, getting joystick events! */
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while (!done) {
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/* blank screen, set up for drawing this frame. */
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SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);
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SDL_RenderClear(screen);
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_JOYAXISMOTION:
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@ -101,100 +128,86 @@ WatchJoystick(SDL_Joystick * joystick)
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break;
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}
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}
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/* Update visual joystick state */
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for (i = 0; i < state->num_windows; ++i) {
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screen = state->renderers[i];
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/* Erase previous axes */
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SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0x00, SDL_ALPHA_OPAQUE);
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SDL_RenderClear(screen);
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/* Query the sizes */
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SDL_RenderGetViewport(screen, &viewport);
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SDL_SetRenderDrawColor(screen, 0x00, 0xFF, 0x00, SDL_ALPHA_OPAQUE);
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for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) {
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if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
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DrawRect(screen, i * 34, viewport.h - 34, 32, 32);
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}
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SDL_SetRenderDrawColor(screen, 0x00, 0xFF, 0x00, SDL_ALPHA_OPAQUE);
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for (i = 0; i < SDL_JoystickNumButtons(joystick); ++i) {
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if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) {
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DrawRect(screen, i * 34, SCREEN_HEIGHT - 34, 32, 32);
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}
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SDL_SetRenderDrawColor(screen, 0xFF, 0x00, 0x00, SDL_ALPHA_OPAQUE);
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for (i = 0; i < SDL_JoystickNumAxes(joystick) / 2; ++i) {
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/* Draw the X/Y axis */
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int x, y;
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x = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 0)) + 32768);
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x *= viewport.w ;
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x /= 65535;
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if (x < 0) {
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x = 0;
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} else if (x > (viewport.w - 16)) {
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x = viewport.w - 16;
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}
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y = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 1)) + 32768);
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y *= viewport.h;
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y /= 65535;
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if (y < 0) {
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y = 0;
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} else if (y > (viewport.h - 16)) {
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y = viewport.h - 16;
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}
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DrawRect(screen, x, y, 16, 16);
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}
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SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0xFF, SDL_ALPHA_OPAQUE);
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for (i = 0; i < SDL_JoystickNumHats(joystick); ++i) {
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/* Derive the new position */
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int x = viewport.w/2;
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int y = viewport.h/2;
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const Uint8 hat_pos = SDL_JoystickGetHat(joystick, i);
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if (hat_pos & SDL_HAT_UP) {
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y = 0;
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} else if (hat_pos & SDL_HAT_DOWN) {
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y = viewport.h-8;
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}
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if (hat_pos & SDL_HAT_LEFT) {
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x = 0;
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} else if (hat_pos & SDL_HAT_RIGHT) {
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x = viewport.w-8;
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}
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DrawRect(screen, x, y, 8, 8);
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}
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SDL_RenderPresent(screen);
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}
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SDL_SetRenderDrawColor(screen, 0xFF, 0x00, 0x00, SDL_ALPHA_OPAQUE);
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for (i = 0; i < SDL_JoystickNumAxes(joystick) / 2; ++i) {
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/* Draw the X/Y axis */
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int x, y;
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x = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 0)) + 32768);
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x *= SCREEN_WIDTH;
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x /= 65535;
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if (x < 0) {
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x = 0;
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} else if (x > (SCREEN_WIDTH - 16)) {
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x = SCREEN_WIDTH - 16;
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}
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y = (((int) SDL_JoystickGetAxis(joystick, i * 2 + 1)) + 32768);
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y *= SCREEN_HEIGHT;
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y /= 65535;
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if (y < 0) {
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y = 0;
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} else if (y > (SCREEN_HEIGHT - 16)) {
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y = SCREEN_HEIGHT - 16;
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}
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DrawRect(screen, x, y, 16, 16);
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}
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SDL_SetRenderDrawColor(screen, 0x00, 0x00, 0xFF, SDL_ALPHA_OPAQUE);
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for (i = 0; i < SDL_JoystickNumHats(joystick); ++i) {
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/* Derive the new position */
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int x = SCREEN_WIDTH/2;
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int y = SCREEN_HEIGHT/2;
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const Uint8 hat_pos = SDL_JoystickGetHat(joystick, i);
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if (hat_pos & SDL_HAT_UP) {
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y = 0;
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} else if (hat_pos & SDL_HAT_DOWN) {
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y = SCREEN_HEIGHT-8;
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}
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if (hat_pos & SDL_HAT_LEFT) {
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x = 0;
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} else if (hat_pos & SDL_HAT_RIGHT) {
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x = SCREEN_WIDTH-8;
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}
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DrawRect(screen, x, y, 8, 8);
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}
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SDL_RenderPresent(screen);
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done = SDL_JoystickGetAttached( joystick ) == 0;
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}
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SDL_DestroyRenderer(screen);
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SDL_DestroyWindow(window);
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}
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int
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main(int argc, char *argv[])
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{
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const char *name;
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int i, joy=-1;
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int i;
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SDL_Joystick *joystick;
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/* Initialize SDL (Note: video is required to start event loop) */
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if (SDL_Init(SDL_INIT_JOYSTICK) < 0) {
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if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
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fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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exit(1);
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}
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/* Initialize test framework */
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state = CommonCreateState(argv, SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
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if (!state) {
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fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return 1;
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}
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/* Print information about the joysticks */
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printf("There are %d joysticks attached\n", SDL_NumJoysticks());
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for (i = 0; i < SDL_NumJoysticks(); ++i) {
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name = SDL_JoystickName(i);
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name = SDL_JoystickNameForIndex(i);
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printf("Joystick %d: %s\n", i, name ? name : "Unknown Joystick");
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joystick = SDL_JoystickOpen(i);
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if (joystick == NULL) {
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@ -205,42 +218,34 @@ main(int argc, char *argv[])
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printf(" balls: %d\n", SDL_JoystickNumBalls(joystick));
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printf(" hats: %d\n", SDL_JoystickNumHats(joystick));
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printf(" buttons: %d\n", SDL_JoystickNumButtons(joystick));
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printf("instance id: %d\n", SDL_JoystickInstanceID(joystick));
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SDL_JoystickClose(joystick);
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}
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}
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for (i = 1; i < argc;) {
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int consumed;
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consumed = CommonArg(state, i);
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if (consumed == 0) {
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consumed = -1;
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if (SDL_isdigit(*argv[i])) {
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joy = SDL_atoi(argv[i]);
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consumed = 1;
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}
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}
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if (consumed < 0) {
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return 1;
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}
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i += consumed;
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}
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if (!CommonInit(state)) {
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return 2;
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}
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if (joy > -1) {
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joystick = SDL_JoystickOpen(joy);
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if (joystick == NULL) {
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printf("Couldn't open joystick %d: %s\n", joy,
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SDL_GetError());
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} else {
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WatchJoystick(joystick);
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SDL_JoystickClose(joystick);
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}
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}
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SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
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CommonQuit(state);
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if (argv[1]) {
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int nreportederror = 0;
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SDL_Event event;
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joystick = SDL_JoystickOpen(atoi(argv[1]));
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while ( 1 ) {
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if (joystick == NULL) {
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if ( nreportederror == 0 ) {
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printf("Couldn't open joystick %d: %s\n", atoi(argv[1]), SDL_GetError());
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nreportederror = 1;
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}
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} else {
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nreportederror = 0;
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WatchJoystick(joystick);
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SDL_JoystickClose(joystick);
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}
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joystick = NULL;
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SDL_WaitEvent( &event );
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if ( event.type == SDL_JOYDEVICEADDED )
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joystick = SDL_JoystickOpen(atoi(argv[1]));
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}
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}
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SDL_QuitSubSystem(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
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return (0);
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}
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