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