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