filename | src/display.h |
changeset | 1282:9f445c5e252b |
prev | 1256:a9d29fe74bf3 |
author | nkeynes |
date | Sat Aug 04 08:46:28 2012 +1000 (11 years ago) |
permissions | -rw-r--r-- |
last change | Handle corner case in pvr2_run_slice when we've previously slightly overrun the end of the time slice |
view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * The PC side of the video support (responsible for actually displaying /
5 * rendering frames)
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #ifndef lxdream_display_H
21 #define lxdream_display_H 1
23 #define GL_GLEXT_PROTOTYPES 1
25 #include <stdint.h>
26 #include <stdio.h>
27 #include <glib.h>
28 #include "lxdream.h"
29 #include "gettext.h"
30 #include "config.h"
31 #ifdef APPLE_BUILD
32 #include <OpenGL/gl.h>
33 #include <OpenGL/glext.h>
34 #else
35 #if HAVE_GLES2
36 #include <GLES2/gl2.h>
37 #include <GLES2/gl2ext.h>
38 #else
39 #include <GL/gl.h>
40 #include <GL/glext.h>
41 #endif
42 #endif
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
48 /**
49 * Supported colour formats. Note that BGRA4444 is only ever used for texture
50 * rendering (it's not valid for display purposes).
51 */
52 #define COLFMT_BGRA1555 0
53 #define COLFMT_RGB565 1
54 #define COLFMT_BGRA4444 2
55 #define COLFMT_YUV422 3 /* 8-bit YUV (texture source only) */
56 #define COLFMT_BGR888 4 /* 24-bit BGR */
57 #define COLFMT_BGRA8888 5
58 #define COLFMT_INDEX4 6 /* 4 bit indexed colour (texture source only) */
59 #define COLFMT_INDEX8 7 /* 8-bit indexed colour (texture source only) */
60 #define COLFMT_BGR0888 8 /* 32-bit BGR */
61 #define COLFMT_RGB888 9 /* 24-bit RGB (ie GL native) */
63 /**
64 * The standard display size (for the purposes of mouse inputs, etc, is 640x480 -
65 * events should be adjusted accordingly if this is not the actual window size.
66 */
67 #define DISPLAY_WIDTH 640
68 #define DISPLAY_HEIGHT 480
70 struct colour_format {
71 GLint type, format, int_format;
72 int bpp;
73 };
74 extern struct colour_format colour_formats[];
76 extern int colour_format_bytes[];
78 /**
79 * Structure to hold pixel data held in GL buffers.
80 */
81 struct render_buffer {
82 uint32_t width;
83 uint32_t height;
84 uint32_t rowstride;
85 uint32_t colour_format;
86 sh4addr_t address; /* Address buffer was rendered to, or -1 for unrendered */
87 uint32_t size; /* Size of buffer in bytes, must be width*height*bpp */
88 gboolean inverted;/* True if the buffer is upside down */
89 uint32_t scale;
90 GLuint tex_id; /* texture bound to render buffer, if any (0 = none).
91 * The render buffer does not own the texture */
92 unsigned int buf_id; /* driver-specific buffer id, if applicable */
93 gboolean flushed; /* True if the buffer has been flushed to vram */
94 };
96 /**
97 * Structure to hold pixel data stored in pvr2 vram, as opposed to data in
98 * GL buffers.
99 */
100 struct frame_buffer {
101 uint32_t width;
102 uint32_t height;
103 uint32_t rowstride;
104 uint32_t colour_format; /* Colour format that the dreamcast expects the data to be in */
105 sh4addr_t address;
106 uint32_t size; /* Size of buffer in bytes, must be width*height*bpp */
107 gboolean inverted;/* True if the buffer is upside down */
108 unsigned char *data;
109 };
111 struct display_capabilities {
112 gboolean has_gl;
113 gboolean has_sl;
114 gboolean has_bgra;
115 int depth_bits;
116 int stencil_bits; /* 0 = no stencil buffer */
117 };
119 struct vertex_buffer {
120 /**
121 * Map the buffer into the host address space (if necessary) in preparation
122 * for filling the buffer. This also implies a fence operation.
123 * @param buf previously allocated buffer
124 * @param size number of bytes of the buffer actually to be used. The buffer
125 * will be resized if necessary.
126 * @return a pointer to the start of the buffer.
127 */
128 void *(*map)(vertex_buffer_t buf, uint32_t size);
130 /**
131 * Unmap the buffer, after the vertex data is written.
132 * @return the buffer base to use for gl*Pointer calls
133 */
134 void *(*unmap)(vertex_buffer_t buf);
136 /**
137 * Mark the buffer as finished, indicating that the vertex data is no
138 * longer required (ie rendering is complete).
139 */
140 void (*finished)(vertex_buffer_t buf);
142 /**
143 * Delete the buffer and all associated resources.
144 */
145 void (*destroy)(vertex_buffer_t buf);
147 /* Private data */
148 void *data;
149 GLuint id;
150 uint32_t capacity;
151 uint32_t mapped_size;
152 GLuint fence;
153 };
156 /**
157 * Core video driver - exports function to setup a GL context, as well as handle
158 * keyboard input and display resultant output.
159 */
160 typedef struct display_driver {
161 char *name;
162 /**
163 * Short (<60 chars) description of the driver. This should be marked for
164 * localization.
165 */
166 char *description;
167 /**
168 * Initialize the driver. This is called only once at startup time, and
169 * is guaranteed to be called before any other methods.
170 * @return TRUE if the driver was successfully initialized, otherwise
171 * FALSE.
172 */
173 gboolean (*init_driver)(void);
175 /**
176 * Cleanly shutdown the driver. Normally only called at system shutdown
177 * time.
178 */
179 void (*shutdown_driver)(void);
181 /**
182 * Given a particular keysym, return the keycode associated with it.
183 * @param keysym The keysym to be resolved, ie "Tab"
184 * @return the display-specific keycode, or 0 if the keysym cannot
185 * be resolved.
186 */
187 uint16_t (*resolve_keysym)( const gchar *keysym );
189 /**
190 * Given a native system keycode, convert it to a dreamcast keyboard code.
191 */
192 uint16_t (*convert_to_dckeysym)( uint16_t keycode );
194 /**
195 * Given a device-specific event code, return the corresponding keysym.
196 * The string should be newly allocated (caller will free)
197 */
198 gchar *(*get_keysym_for_keycode)( uint16_t keycode );
200 /**
201 * Create a render target with the given width and height. If a texture ID
202 * is supplied (non-zero), the render buffer writes its output to that texture.
203 * @param tex_id 0 or a valid GL texture name which must have been initialized to
204 * the correct dimensions.
205 */
206 render_buffer_t (*create_render_buffer)( uint32_t width, uint32_t height, GLuint tex_id );
208 /**
209 * Destroy the specified render buffer and release any associated
210 * resources.
211 */
212 void (*destroy_render_buffer)( render_buffer_t buffer );
214 /**
215 * Set the current rendering target to the specified buffer.
216 */
217 gboolean (*set_render_target)( render_buffer_t buffer );
219 /**
220 * Complete rendering and clear the current rendering target. If the
221 * buffer has a bound texture, it will be updated if necessary.
222 */
223 void (*finish_render)( render_buffer_t buffer );
225 /**
226 * Load the supplied frame buffer into the given render buffer.
227 * Included here to allow driver-specific optimizations.
228 */
229 void (*load_frame_buffer)( frame_buffer_t frame, render_buffer_t render );
231 /**
232 * Display a single frame using a previously rendered GL buffer.
233 */
234 void (*display_render_buffer)( render_buffer_t buffer );
236 /**
237 * Display a single blanked frame using a fixed colour for the
238 * entire frame (specified in BGR888 format).
239 */
240 void (*display_blank)( uint32_t rgb );
242 /**
243 * Swap front/back window buffers
244 */
245 void (*swap_buffers)();
247 /**
248 * Copy the image data from the GL buffer to the target memory buffer,
249 * using the format etc from the buffer. This may force a glFinish()
250 * but does not invalidate the buffer.
251 * @param target buffer to fill with image data, which must be large enough
252 * to accomodate the image.
253 * @param buffer Render buffer to read from.
254 * @param rowstride rowstride of the target data
255 * @param format colour format to output the data in.
256 */
257 gboolean (*read_render_buffer)( unsigned char *target, render_buffer_t buffer,
258 int rowstride, int format );
260 /**
261 * Create a new vertex buffer
262 */
263 vertex_buffer_t (*create_vertex_buffer)( );
265 /**
266 * Dump driver-specific information about the implementation to the given stream
267 */
268 void (*print_info)( FILE *out );
270 struct display_capabilities capabilities;
272 } *display_driver_t;
274 /**
275 * Print the configured video drivers to the output stream, one to a line.
276 */
277 void print_display_drivers( FILE *out );
278 display_driver_t get_display_driver_by_name( const char *name );
279 gboolean display_set_driver( display_driver_t driver );
281 extern uint32_t pvr2_frame_counter;
283 extern display_driver_t display_driver;
285 extern struct display_driver display_gtk_driver;
286 extern struct display_driver display_osx_driver;
287 extern struct display_driver display_gl_driver;
288 extern struct display_driver display_egl_driver;
289 extern struct display_driver display_null_driver;
291 /****************** Input methods **********************/
293 #define MAX_MOUSE_BUTTONS 32
295 /* Pressure is 0..127 (allowing a joystick to be defined as two half-axes of 7- bits each) */
296 #define MAX_PRESSURE 0x7F
298 typedef key_binding_t input_key_callback_t;
300 /**
301 * Callback to receive mouse input events
302 * @param data pointer passed in at the time the hook was registered
303 * @param buttons bitmask of button states, where bit 0 is button 0 (left), bit 1 is button
304 * 1 (middle), bit 2 is button 2 (right) and so forth.
305 * @param x Horizontal movement since the last invocation (in relative mode) or window position
306 * (in absolute mode).
307 * @param y Vertical movement since the last invocation (in relative mode) or window position
308 * (in absolute mode).
309 * @param absolute If TRUE, x and y are the current window coordinates
310 * of the mouse cursor. Otherwise, x and y are deltas from the previous mouse position.
311 */
312 typedef void (*input_mouse_callback_t)( void *data, uint32_t buttons, int32_t x, int32_t y, gboolean absolute );
314 gboolean input_register_key( const gchar *keysym, input_key_callback_t callback,
315 void *data, uint32_t value );
317 void input_unregister_key( const gchar *keysym, input_key_callback_t callback,
318 void *data, uint32_t value );
320 gboolean input_register_keygroup( lxdream_config_group_t group );
321 void input_unregister_keygroup( lxdream_config_group_t group );
322 gboolean input_keygroup_changed( void *data, lxdream_config_group_t group, unsigned key,
323 const gchar *oldval, const gchar *newval );
325 /**
326 * Register a hook to receive all keyboard input events
327 */
328 gboolean input_register_keyboard_hook( input_key_callback_t callback, void *data );
329 void input_unregister_keyboard_hook( input_key_callback_t callback, void *data );
331 /**
332 * Register a mouse event hook.
333 * @param relative TRUE if the caller wants relative mouse movement, FALSE for
334 * absolute mouse positioning. It's not generally possible to receive both at the same time.
335 */
336 gboolean input_register_mouse_hook( gboolean relative, input_mouse_callback_t callback, void *data );
337 void input_unregister_mouse_hook( input_mouse_callback_t callback, void *data );
339 gboolean input_is_key_valid( const gchar *keysym );
341 gboolean input_is_key_registered( const gchar *keysym );
343 uint16_t input_keycode_to_dckeysym( uint16_t keycode );
345 /********************** Display/Input methods ***********************/
347 /**
348 * Auxilliary input driver - provides input separate to and in addition to the
349 * core UI/display. (primarily used for joystick devices)
350 */
351 typedef struct input_driver {
352 const char *id; /* Short identifier to display in the UI for the device (eg "JS0" ) */
354 /**
355 * Given a particular keysym, return the keycode associated with it.
356 * @param keysym The keysym to be resolved, ie "Tab"
357 * @return the display-specific keycode, or 0 if the keysym cannot
358 * be resolved.
359 */
360 uint16_t (*resolve_keysym)( struct input_driver *driver, const gchar *keysym );
362 /**
363 * Given a device-specific event code, convert it to a dreamcast keyboard code.
364 * This is only required for actual keyboard devices, other devices should just
365 * leave this method NULL.
366 */
367 uint16_t (*convert_to_dckeysym)( struct input_driver *driver, uint16_t keycode );
369 /**
370 * Given a device-specific event code, return the corresponding keysym.
371 * The string should be newly allocated (caller will free)
372 */
373 gchar *(*get_keysym_for_keycode)( struct input_driver *driver, uint16_t keycode );
375 /**
376 * Destroy the input driver.
377 */
378 void (*destroy)( struct input_driver *driver );
380 } *input_driver_t;
382 extern struct input_driver system_mouse_driver;
384 /**
385 * Register a new input driver (which must have a unique name)
386 * @param driver the driver to register
387 * @param max_keycode the highest possible keycode reported by the device
388 * @return TRUE on success, FALSE on failure (eg driver already registed).
389 */
390 gboolean input_register_device( input_driver_t driver, uint16_t max_keycode );
392 /**
393 * Determine if the system has an input driver with the given unique ID.
394 * @param id driver id to check
395 * @return TRUE if the device exists, otherwise FALSE
396 */
397 gboolean input_has_device( const gchar *id );
399 /**
400 * Unregister an input driver.
401 * @param driver the driver to unregister
402 * If the driver is not in fact registered, this function has no effect.
403 */
404 void input_unregister_device( input_driver_t driver );
406 /**
407 * Called from the UI to indicate that the emulation window is focused (ie
408 * able to receive input). This method is used to gate non-UI input devices -
409 * when the display is not focused, all input events will be silently ignored.
410 */
411 void display_set_focused( gboolean has_focus );
413 /**
414 * Fire a keydown event on the specified device
415 * @param input The input device source generating the event, or NULL for the
416 * default GUI device
417 * @param keycode The device-specific keycode
418 * @param pressure The pressure of the key (0 to 127), where 0 is unpressed and
419 * 127 is maximum pressure. Devices without pressure sensitivity should
420 * always use MAX_PRESSURE (127)
421 */
422 void input_event_keydown( input_driver_t input, uint16_t keycode, uint32_t pressure );
424 void input_event_keyup( input_driver_t input, uint16_t keycode );
426 /**
427 * Receive an input mouse down event. Normally these should be absolute events when
428 * the mouse is not grabbed, and relative when it is.
429 * @param button the button pressed, where 0 == first button
430 * @param x_axis The relative or absolute position of the mouse cursor on the X axis
431 * @param y_axis The relative or absolute position of the mouse cursor on the Y axis
432 * @param absolute If TRUE, x_axis and y_axis are the current window coordinates
433 * of the mouse cursor. Otherwise, x_axis and y_axis are deltas from the previous mouse position.
434 */
435 void input_event_mousedown( uint16_t button, int32_t x_axis, int32_t y_axis, gboolean absolute );
437 /**
438 * Receive an input mouse up event. Normally these should be absolute events when
439 * the mouse is not grabbed, and relative when it is.
440 * @param button the button released, where 0 == first button
441 * @param x_axis The relative or absolute position of the mouse cursor on the X axis
442 * @param y_axis The relative or absolute position of the mouse cursor on the Y axis
443 * @param absolute If TRUE, x_axis and y_axis are the current window coordinates
444 * of the mouse cursor. Otherwise, x_axis and y_axis are deltas from the previous mouse position.
445 */
446 void input_event_mouseup( uint16_t button, int32_t x_axis, int32_t y_axis, gboolean absolute );
448 /**
449 * Receive an input mouse motion event. Normally these should be absolute events when
450 * the mouse is not grabbed, and relative when it is.
451 * @param x_axis The relative or absolute position of the mouse cursor on the X axis
452 * @param y_axis The relative or absolute position of the mouse cursor on the Y axis
453 * @param absolute If TRUE, x_axis and y_axis are the current window coordinates
454 * of the mouse cursor. Otherwise, x_axis and y_axis are deltas from the previous mouse position.
455 */
456 void input_event_mousemove( int32_t x_axis, int32_t y_axis, gboolean absolute );
458 /**
459 * Given a keycode and the originating input driver, return the corresponding
460 * keysym. The caller is responsible for freeing the string.
461 * @return a newly allocated string, or NULL of the keycode is unresolvable.
462 */
463 gchar *input_keycode_to_keysym( input_driver_t driver, uint16_t keycode );
465 typedef void (*display_keysym_callback_t)( void *data, const gchar *keysym );
467 /**
468 * Set the keysym hook function (normally used by the UI to receive non-UI
469 * input events during configuration.
470 */
471 void input_set_keysym_hook( display_keysym_callback_t hook, void *data );
475 #ifdef __cplusplus
476 }
477 #endif
478 #endif /* !lxdream_display_H */
.