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