vcs.maemo.org Git - drnoksnes/blob - platform/sdli.cpp

   1 #include <SDL.h>
   2 #include <math.h>
   3
   4 #include "platform.h"
   5 #include "snes9x.h"
   6 #include "sdlv.h" // Dispatching video-related events
   7
   8 #if CONF_ZEEMOTE
   9 #include "zeemote.h"
  10 #endif
  11
  12 #if !defined(SDL_MAXMOUSE)
  13 #define SDL_MAXMOUSE 1
  14 #endif
  15
  16 struct TouchButton {
  17         unsigned short mask;
  18         unsigned short x, y;
  19         unsigned short x2, y2;
  20         double fx, fy;
  21         double fw, fh;
  22 };
  23
  24 #define kCornerButtonWidth      (0.375)
  25 #define kCornerButtonHeight     (0.0833333333334)
  26 #define kBigButtonWidth         (0.125)
  27 #define kBigButtonHeight        (0.2777777777778)
  28
  29 static TouchButton touchbuttons[] = {
  30 #define TB(actions, x, y, w, h) \
  31         {actions, 0, 0, 0, 0, x, y, w, h}
  32 #define P(x) SNES_##x##_MASK
  33         TB(P(TL), 0.0, 0.0, kCornerButtonWidth, kCornerButtonHeight),
  34         TB(P(TR), 0.625, 0.0, kCornerButtonWidth, kCornerButtonHeight),
  35         TB(P(LEFT) | P(UP), 0.0, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  36         TB(P(UP), kBigButtonWidth, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  37         TB(P(RIGHT) | P(UP), 2.0 * kBigButtonWidth, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  38         TB(P(LEFT), 0.0, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  39         TB(P(RIGHT), 2.0 * kBigButtonWidth, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  40         TB(P(LEFT) | P(DOWN), 0, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  41         TB(P(DOWN), kBigButtonWidth, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  42         TB(P(RIGHT) | P(DOWN), 2.0 * kBigButtonWidth, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  43         TB(P(SELECT), 0.0, 1.0 - kCornerButtonHeight, kCornerButtonWidth, kCornerButtonHeight),
  44         TB(P(X), 1.0 - 2.0 * kBigButtonWidth, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  45         TB(P(Y), 1.0 - 3.0 * kBigButtonWidth, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  46         TB(P(A), 1.0 - kBigButtonWidth, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  47         TB(P(B), 1.0 - 2.0 * kBigButtonWidth, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  48         TB(P(START), 1.0 - kCornerButtonWidth, 1.0 - kCornerButtonHeight, kCornerButtonWidth, kCornerButtonHeight),
  49 #undef P
  50 #undef TB
  51 };
  52
  53 static TouchButton* current[SDL_MAXMOUSE] = { 0 };
  54
  55 static uint32 joypads[2];
  56 static struct {
  57         unsigned x;
  58         unsigned y;
  59         bool enabled, pressed;
  60 } mouse;
  61
  62 static TouchButton* getButtonFor(unsigned int x, unsigned int y) {
  63         unsigned int i;
  64
  65         for (i = 0; i < sizeof(touchbuttons)/sizeof(TouchButton); i++) {
  66                 if (x >= touchbuttons[i].x && x < touchbuttons[i].x2 &&
  67                         y >= touchbuttons[i].y && y < touchbuttons[i].y2) {
  68
  69                         return &touchbuttons[i];
  70                 }
  71         }
  72
  73         return 0;
  74 }
  75
  76 static inline void unpress(TouchButton* b) {
  77         joypads[Config.touchscreenInput - 1] &= ~b->mask;
  78 }
  79 static inline void press(TouchButton* b) {
  80         joypads[Config.touchscreenInput - 1] |= b->mask;
  81 }
  82
  83 static void processMouse(int which, unsigned int x, unsigned int y, int pressed = 0)
  84 {
  85 #if CONF_EXIT_BUTTON
  86         /* no fullscreen escape button, we have to simulate one! */
  87         /* TODO: don't hardcode sizes */
  88         if (Config.fullscreen && x > (800 - 100) && y < 50 && pressed > 0) {
  89                 S9xDoAction(kActionQuit);
  90         }
  91 #endif
  92         if (Config.touchscreenInput) {
  93                 if (pressed < 0) {
  94                         // Button up.
  95                         if (current[which]) {
  96                                 // Leaving button
  97                                 unpress(current[which]);
  98                                 current[which] = 0;
  99                         }
 100                 } else {
 101                         // Button down, or mouse motion.
 102                         TouchButton* b = getButtonFor(x, y);
 103                         if (current[which] && b && current[which] != b) {
 104                                 // Moving from button to button
 105                                 unpress(current[which]);
 106                                 current[which] = b;
 107                                 press(current[which]);
 108                         } else if (current[which] && !b) {
 109                                 // Leaving button
 110                                 unpress(current[which]);
 111                                 current[which] = 0;
 112                         } else if (!current[which] && b) {
 113                                 // Entering button
 114                                 current[which] = b;
 115                                 press(current[which]);
 116                         }
 117                 }
 118         } else if (mouse.enabled) {
 119                 mouse.x = x;
 120                 mouse.y = y;
 121
 122                 if (mouse.x < GUI.RenderX) mouse.x = 0;
 123                 else {
 124                         mouse.x -= GUI.RenderX;
 125                         if (mouse.x > GUI.RenderW) mouse.x = GUI.RenderW;
 126                 }
 127
 128                 if (mouse.y < GUI.RenderY) mouse.y = 0;
 129                 else {
 130                         mouse.y -= GUI.RenderY;
 131                         if (mouse.y > GUI.RenderH) mouse.y = GUI.RenderH;
 132                 }
 133
 134                 // mouse.{x,y} are system coordinates.
 135                 // Scale them to emulated screen coordinates.
 136                 mouse.x = static_cast<unsigned int>(mouse.x / GUI.ScaleX);
 137                 mouse.y = static_cast<unsigned int>(mouse.y / GUI.ScaleY);
 138
 139                 if (pressed > 0)
 140                         mouse.pressed = true;
 141                 else if (pressed < 0)
 142                         mouse.pressed = false;
 143         }
 144 }
 145
 146 static void processEvent(const SDL_Event& event)
 147 {
 148         if (videoEventFilter(event)) return;
 149
 150         switch (event.type)
 151         {
 152                 case SDL_KEYDOWN:
 153                         if (Config.action[event.key.keysym.scancode])
 154                                 S9xDoAction(Config.action[event.key.keysym.scancode]);
 155                         joypads[0] |= Config.joypad1Mapping[event.key.keysym.scancode];
 156                         joypads[1] |= Config.joypad2Mapping[event.key.keysym.scancode];
 157                         break;
 158                 case SDL_KEYUP:
 159                         joypads[0] &= ~Config.joypad1Mapping[event.key.keysym.scancode];
 160                         joypads[1] &= ~Config.joypad2Mapping[event.key.keysym.scancode];
 161                         break;
 162                 case SDL_MOUSEBUTTONUP:
 163                 case SDL_MOUSEBUTTONDOWN:
 164                         processMouse(event.button.which, event.button.x, event.button.y,
 165                                         (event.button.state == SDL_PRESSED) ? 1 : - 1);
 166                         break;
 167                 case SDL_MOUSEMOTION:
 168                         processMouse(event.button.which, event.motion.x, event.motion.y);
 169                         break;
 170                 case SDL_QUIT:
 171                         Config.quitting = true;
 172                         break;
 173         }
 174 }
 175
 176 /** This function is called to return a bit-wise mask of the state of one of the
 177         five emulated SNES controllers.
 178
 179         @return 0 if you're not supporting controllers past a certain number or
 180                 return the mask representing the current state of the controller number
 181                 passed as a parameter or'ed with 0x80000000.
 182 */
 183
 184 uint32 S9xReadJoypad (int which)
 185 {
 186         if (which < 0 || which >= 2) {
 187                 // More joypads that we currently handle (could happen if bad conf)
 188                 return 0;
 189         }
 190
 191         return joypads[which];
 192 }
 193
 194 /** Get the current position of the host pointing device, usually a mouse,
 195         used to emulated the SNES mouse.
 196
 197         @param buttons The buttons return value is a bit-wise mask of the two SNES
 198                 mouse buttons, bit 0 for button 1 (left) and bit 1 for button 2 (right).
 199 */
 200 bool8 S9xReadMousePosition(int which, int *x, int *y, uint32 *buttons)
 201 {
 202         if (which != 0) return FALSE;
 203
 204         *x = mouse.x;
 205         *y = mouse.y;
 206         *buttons = mouse.pressed ? 1 : 0;
 207
 208         return TRUE;
 209 }
 210
 211 bool8 S9xReadSuperScopePosition(int *x, int *y, uint32 *buttons)
 212 {
 213         *x = mouse.x;
 214         *y = mouse.y;
 215         *buttons = mouse.pressed ? 8 : 0;
 216
 217         return TRUE;
 218 }
 219
 220 /** Get and process system/input events.
 221         @param block true to block, false to poll until the queue is empty.
 222 */
 223 void S9xProcessEvents(bool block)
 224 {
 225         SDL_Event event;
 226
 227 #if CONF_ZEEMOTE
 228         // Wheter blocking or non blocking, poll zeemotes now.
 229         ZeeRead(joypads);
 230 #endif
 231
 232         if (block) {
 233                 SDL_WaitEvent(&event);
 234                 processEvent(event);
 235         } else {
 236                 while(SDL_PollEvent(&event)) {
 237                         processEvent(event);
 238                 }
 239         }
 240 }
 241
 242 void S9xInitInputDevices()
 243 {
 244         joypads[0] = 0;
 245         joypads[1] = 0;
 246         mouse.enabled = false;
 247         mouse.pressed = false;
 248
 249 #if CONF_ZEEMOTE
 250         ZeeInit();
 251 #endif
 252
 253         if (Config.joypad1Enabled) {
 254                 joypads[0] = 0x80000000UL;
 255         }
 256         if (Config.joypad2Enabled) {
 257                 joypads[1] = 0x80000000UL;
 258         }
 259
 260         // Pretty print some information
 261         printf("Input: ");
 262         if (Config.joypad1Enabled) {
 263                 printf("Player 1 (joypad)");
 264                 if (Config.joypad2Enabled) {
 265                         printf("+ player 2 (joypad)");
 266                 }
 267         } else if (Config.joypad2Enabled) {
 268                 printf("Player 2 (joypad)");
 269         } else {
 270                 printf("Nothing");
 271         }
 272         printf("\n");
 273
 274         // TODO Non-awful mouse & superscope support
 275
 276         S9xInputScreenChanged();
 277 }
 278
 279 void S9xDeinitInputDevices()
 280 {
 281 #if CONF_ZEEMOTE
 282         ZeeQuit();
 283 #endif
 284         joypads[0] = 0;
 285         joypads[1] = 0;
 286         mouse.enabled = false;
 287         mouse.pressed = false;
 288 }
 289
 290 void S9xInputScreenChanged()
 291 {
 292         unsigned int i = 0;
 293         const unsigned int w = GUI.Width, h = GUI.Height;
 294         for (i = 0; i < sizeof(touchbuttons)/sizeof(TouchButton); i++) {
 295                 touchbuttons[i].x = (unsigned int)(touchbuttons[i].fx * w);
 296                 touchbuttons[i].y = (unsigned int)(touchbuttons[i].fy * h);
 297                 touchbuttons[i].x2 = (unsigned int)(touchbuttons[i].x + touchbuttons[i].fw * w);
 298                 touchbuttons[i].y2 = (unsigned int)(touchbuttons[i].y + touchbuttons[i].fh * h);
 299         }
 300 }
 301
 302 template <typename T>
 303 static void drawControls(T * buffer, const int pitch)
 304 {
 305         unsigned int i = 0;
 306         int x, y;
 307         const T black = static_cast<T>(0xFFFFFFFFU);
 308         T* temp;
 309
 310         for (i = 0; i < sizeof(touchbuttons)/sizeof(TouchButton); i++) {
 311                 temp = buffer + touchbuttons[i].y * pitch + touchbuttons[i].x;
 312                 for (x = touchbuttons[i].x; x < touchbuttons[i].x2; x++) {
 313                         *temp = black;
 314                         temp++;
 315                 }
 316                 temp = buffer + touchbuttons[i].y2 * pitch + touchbuttons[i].x;
 317                 for (x = touchbuttons[i].x; x < touchbuttons[i].x2; x++) {
 318                         *temp = black;
 319                         temp++;
 320                 }
 321                 temp = buffer + touchbuttons[i].y * pitch + touchbuttons[i].x;
 322                 for (y = touchbuttons[i].y; y < touchbuttons[i].y2; y++) {
 323                         *temp = black;
 324                         temp+=pitch;
 325                 }
 326                 temp = buffer + touchbuttons[i].y * pitch + touchbuttons[i].x2;
 327                 for (y = touchbuttons[i].y; y < touchbuttons[i].y2; y++) {
 328                         *temp = black;
 329                         temp+=pitch;
 330                 }
 331         }
 332 }
 333
 334 void S9xInputScreenDraw(void * buffer, int pitch)
 335 {
 336         drawControls(reinterpret_cast<uint16*>(buffer), pitch / 2);
 337 }
 338