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 "display.h"
   7 #include "sdlv.h" // Dispatching video-related events
   8
   9 #if CONF_ZEEMOTE
  10 #include "zeemote.h"
  11 #endif
  12
  13 struct TouchButton {
  14         unsigned short mask;
  15         unsigned short x, y;
  16         unsigned short x2, y2;
  17         double fx, fy;
  18         double fw, fh;
  19 };
  20
  21 #define kCornerButtonWidth      (0.375)
  22 #define kCornerButtonHeight     (0.0833333333334)
  23 #define kBigButtonWidth         (0.125)
  24 #define kBigButtonHeight        (0.2777777777778)
  25
  26 static TouchButton touchbuttons[] = {
  27 #define TB(actions, x, y, w, h) \
  28         {actions, 0, 0, 0, 0, x, y, w, h}
  29 #define P(x) SNES_##x##_MASK
  30         TB(P(TL), 0.0, 0.0, kCornerButtonWidth, kCornerButtonHeight),
  31         TB(P(TR), 0.625, 0.0, kCornerButtonWidth, kCornerButtonHeight),
  32         TB(P(LEFT) | P(UP), 0.0, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  33         TB(P(UP), kBigButtonWidth, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  34         TB(P(RIGHT) | P(UP), 2.0 * kBigButtonWidth, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  35         TB(P(LEFT), 0.0, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  36         TB(P(RIGHT), 2.0 * kBigButtonWidth, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  37         TB(P(LEFT) | P(DOWN), 0, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  38         TB(P(DOWN), kBigButtonWidth, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  39         TB(P(RIGHT) | P(DOWN), 2.0 * kBigButtonWidth, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  40         TB(P(SELECT), 0.0, 1.0 - kCornerButtonHeight, kCornerButtonWidth, kCornerButtonHeight),
  41         TB(P(X), 1.0 - 2.0 * kBigButtonWidth, kCornerButtonHeight, kBigButtonWidth, kBigButtonHeight),
  42         TB(P(Y), 1.0 - 3.0 * kBigButtonWidth, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  43         TB(P(A), 1.0 - kBigButtonWidth, kCornerButtonHeight + kBigButtonHeight, kBigButtonWidth, kBigButtonHeight),
  44         TB(P(B), 1.0 - 2.0 * kBigButtonWidth, 1.0 - (kCornerButtonHeight + kBigButtonHeight), kBigButtonWidth, kBigButtonHeight),
  45         TB(P(START), 1.0 - kCornerButtonWidth, 1.0 - kCornerButtonHeight, kCornerButtonWidth, kCornerButtonHeight),
  46 #undef P
  47 #undef TB
  48 };
  49
  50 static TouchButton* current = 0;
  51
  52 static uint32 joypads[2];
  53 static struct {
  54         unsigned x;
  55         unsigned y;
  56         bool enabled, pressed;
  57 } mouse;
  58
  59 static TouchButton* getButtonFor(unsigned int x, unsigned int y) {
  60         unsigned int i;
  61
  62         for (i = 0; i < sizeof(touchbuttons)/sizeof(TouchButton); i++) {
  63                 if (x >= touchbuttons[i].x && x < touchbuttons[i].x2 &&
  64                         y >= touchbuttons[i].y && y < touchbuttons[i].y2) {
  65
  66                         return &touchbuttons[i];
  67                 }
  68         }
  69
  70         return 0;
  71 }
  72
  73 static inline void unpress(TouchButton* b) {
  74         joypads[Config.touchscreenInput - 1] &= ~b->mask;
  75 }
  76 static inline void press(TouchButton* b) {
  77         joypads[Config.touchscreenInput - 1] |= b->mask;
  78 }
  79
  80 static void processMouse(unsigned int x, unsigned int y, int pressed = 0)
  81 {
  82 #if CONF_EXIT_BUTTON
  83         /* no fullscreen escape button, we have to simulate one! */
  84         /* TODO: don't hardcode sizes */
  85         if (Config.fullscreen && x > (800 - 100) && y < 50 && pressed > 0) {
  86                 S9xDoAction(kActionQuit);
  87         }
  88 #endif
  89         if (Config.touchscreenInput) {
  90                 if (pressed < 0) {
  91                         // Button up.
  92                         if (current) {
  93                                 // Leaving button
  94                                 unpress(current);
  95                                 current = 0;
  96                         }
  97                 } else {
  98                         // Button down, or mouse motion.
  99                         TouchButton* b = getButtonFor(x, y);
 100                         if (current && b && current != b) {
 101                                 // Moving from button to button
 102                                 unpress(current);
 103                                 current = b;
 104                                 press(current);
 105                         } else if (current && !b) {
 106                                 // Leaving button
 107                                 unpress(current);
 108                                 current = 0;
 109                         } else if (!current && b) {
 110                                 // Entering button
 111                                 current = b;
 112                                 press(current);
 113                         }
 114                 }
 115         } else if (mouse.enabled) {
 116                 mouse.x = x;
 117                 mouse.y = y;
 118
 119                 if (mouse.x < GUI.RenderX) mouse.x = 0;
 120                 else {
 121                         mouse.x -= GUI.RenderX;
 122                         if (mouse.x > GUI.RenderW) mouse.x = GUI.RenderW;
 123                 }
 124
 125                 if (mouse.y < GUI.RenderY) mouse.y = 0;
 126                 else {
 127                         mouse.y -= GUI.RenderY;
 128                         if (mouse.y > GUI.RenderH) mouse.y = GUI.RenderH;
 129                 }
 130
 131                 // mouse.{x,y} are system coordinates.
 132                 // Scale them to emulated screen coordinates.
 133                 mouse.x = static_cast<unsigned int>(mouse.x / GUI.ScaleX);
 134                 mouse.y = static_cast<unsigned int>(mouse.y / GUI.ScaleY);
 135
 136                 if (pressed > 0)
 137                         mouse.pressed = true;
 138                 else if (pressed < 0)
 139                         mouse.pressed = false;
 140         }
 141 }
 142
 143 static void processEvent(const SDL_Event& event)
 144 {
 145         if (videoEventFilter(event)) return;
 146
 147         switch (event.type)
 148         {
 149                 case SDL_KEYDOWN:
 150                         if (Config.action[event.key.keysym.scancode])
 151                                 S9xDoAction(Config.action[event.key.keysym.scancode]);
 152                         joypads[0] |= Config.joypad1Mapping[event.key.keysym.scancode];
 153                         joypads[1] |= Config.joypad2Mapping[event.key.keysym.scancode];
 154                         break;
 155                 case SDL_KEYUP:
 156                         joypads[0] &= ~Config.joypad1Mapping[event.key.keysym.scancode];
 157                         joypads[1] &= ~Config.joypad2Mapping[event.key.keysym.scancode];
 158                         break;
 159                 case SDL_MOUSEBUTTONUP:
 160                 case SDL_MOUSEBUTTONDOWN:
 161                         processMouse(event.button.x, event.button.y,
 162                                         (event.button.state == SDL_PRESSED) ? 1 : - 1);
 163                         break;
 164                 case SDL_MOUSEMOTION:
 165                         processMouse(event.motion.x, event.motion.y);
 166                         break;
 167                 case SDL_QUIT:
 168                         Config.quitting = true;
 169                         break;
 170         }
 171 }
 172
 173 /** This function is called to return a bit-wise mask of the state of one of the
 174         five emulated SNES controllers.
 175
 176         @return 0 if you're not supporting controllers past a certain number or
 177                 return the mask representing the current state of the controller number
 178                 passed as a parameter or'ed with 0x80000000.
 179 */
 180
 181 uint32 S9xReadJoypad (int which)
 182 {
 183         if (which < 0 || which >= 2) {
 184                 // More joypads that we currently handle (could happen if bad conf)
 185                 return 0;
 186         }
 187
 188         return joypads[which];
 189 }
 190
 191 /** Get the current position of the host pointing device, usually a mouse,
 192         used to emulated the SNES mouse.
 193
 194         @param buttons The buttons return value is a bit-wise mask of the two SNES
 195                 mouse buttons, bit 0 for button 1 (left) and bit 1 for button 2 (right).
 196 */
 197 bool8 S9xReadMousePosition(int which1, int& x, int& y, uint32& buttons)
 198 {
 199         if (which1 != 0) return FALSE;
 200
 201         x = mouse.x;
 202         y = mouse.y;
 203         buttons = mouse.pressed ? 1 : 0;
 204
 205         return TRUE;
 206 }
 207
 208 bool8 S9xReadSuperScopePosition(int& x, int& y, uint32& buttons)
 209 {
 210         x = mouse.x;
 211         y = mouse.y;
 212         buttons = mouse.pressed ? 8 : 0;
 213
 214         return TRUE;
 215 }
 216
 217 /** Get and process system/input events.
 218         @param block true to block, false to poll until the queue is empty.
 219 */
 220 void S9xProcessEvents(bool block)
 221 {
 222         SDL_Event event;
 223
 224 #if CONF_ZEEMOTE
 225         // Wheter blocking or non blocking, poll zeemotes now.
 226         ZeeRead(joypads);
 227 #endif
 228
 229         if (block) {
 230                 SDL_WaitEvent(&event);
 231                 processEvent(event);
 232         } else {
 233                 while(SDL_PollEvent(&event)) {
 234                         processEvent(event);
 235                 }
 236         }
 237 }
 238
 239 void S9xInitInputDevices()
 240 {
 241         joypads[0] = 0;
 242         joypads[1] = 0;
 243         mouse.enabled = false;
 244         mouse.pressed = false;
 245
 246 #if CONF_ZEEMOTE
 247         ZeeInit();
 248 #endif
 249
 250         if (Config.joypad1Enabled) {
 251                 joypads[0] = 0x80000000UL;
 252         }
 253         if (Config.joypad2Enabled) {
 254                 joypads[1] = 0x80000000UL;
 255         }
 256
 257         // Pretty print some information
 258         printf("Input: ");
 259         if (Config.joypad1Enabled) {
 260                 printf("Player 1 (joypad)");
 261                 if (Config.joypad2Enabled) {
 262                         printf("+ player 2 (joypad)");
 263                 }
 264         } else if (Config.joypad2Enabled) {
 265                 printf("Player 2 (joypad)");
 266         } else {
 267                 printf("Nothing");
 268         }
 269         printf("\n");
 270
 271         // TODO Non-awful mouse & superscope support
 272
 273         S9xInputScreenChanged();
 274 }
 275
 276 void S9xDeinitInputDevices()
 277 {
 278 #if CONF_ZEEMOTE
 279         ZeeQuit();
 280 #endif
 281         joypads[0] = 0;
 282         joypads[1] = 0;
 283         mouse.enabled = false;
 284         mouse.pressed = false;
 285 }
 286
 287 void S9xInputScreenChanged()
 288 {
 289         unsigned int i = 0;
 290         const unsigned int w = GUI.Width, h = GUI.Height;
 291         for (i = 0; i < sizeof(touchbuttons)/sizeof(TouchButton); i++) {
 292                 touchbuttons[i].x = (unsigned int)(touchbuttons[i].fx * w);
 293                 touchbuttons[i].y = (unsigned int)(touchbuttons[i].fy * h);
 294                 touchbuttons[i].x2 = (unsigned int)(touchbuttons[i].x + touchbuttons[i].fw * w);
 295                 touchbuttons[i].y2 = (unsigned int)(touchbuttons[i].y + touchbuttons[i].fh * h);
 296         }
 297 }
 298
 299 template <typename T>
 300 static void drawControls(T * buffer, const int pitch)
 301 {
 302         unsigned int i = 0;
 303         int x, y;
 304         const T black = static_cast<T>(0xFFFFFFFFU);
 305         T* temp;
 306
 307         for (i = 0; i < sizeof(touchbuttons)/sizeof(TouchButton); i++) {
 308                 temp = buffer + touchbuttons[i].y * pitch + touchbuttons[i].x;
 309                 for (x = touchbuttons[i].x; x < touchbuttons[i].x2; x++) {
 310                         *temp = black;
 311                         temp++;
 312                 }
 313                 temp = buffer + touchbuttons[i].y2 * pitch + touchbuttons[i].x;
 314                 for (x = touchbuttons[i].x; x < touchbuttons[i].x2; x++) {
 315                         *temp = black;
 316                         temp++;
 317                 }
 318                 temp = buffer + touchbuttons[i].y * pitch + touchbuttons[i].x;
 319                 for (y = touchbuttons[i].y; y < touchbuttons[i].y2; y++) {
 320                         *temp = black;
 321                         temp+=pitch;
 322                 }
 323                 temp = buffer + touchbuttons[i].y * pitch + touchbuttons[i].x2;
 324                 for (y = touchbuttons[i].y; y < touchbuttons[i].y2; y++) {
 325                         *temp = black;
 326                         temp+=pitch;
 327                 }
 328         }
 329 }
 330
 331 void S9xInputScreenDraw(int pixelSize, void * buffer, int pitch)
 332 {
 333         switch (pixelSize)
 334         {
 335                 case 1:
 336                         drawControls(reinterpret_cast<uint8*>(buffer), pitch);
 337                         break;
 338                 case 2:
 339                         drawControls(reinterpret_cast<uint16*>(buffer), pitch / 2);
 340                         break;
 341         }
 342 }
 343