filename | src/display.h |
changeset | 1134:f502f3d32f90 |
prev | 1076:18c164e8aec4 |
next | 1159:580436b01b6c |
author | nkeynes |
date | Thu Dec 23 17:50:10 2010 +1000 (13 years ago) |
permissions | -rw-r--r-- |
last change | Clone iso_memory_stream_new() as iso_mem_stream_new(), since current versions of libisofs have made it unlinkable on linux |
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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 #include <GL/gl.h>
36 #include <GL/glext.h>
37 #endif
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
43 /**
44 * Supported colour formats. Note that BGRA4444 is only ever used for texture
45 * rendering (it's not valid for display purposes).
46 */
47 #define COLFMT_BGRA1555 0
48 #define COLFMT_RGB565 1
49 #define COLFMT_BGRA4444 2
50 #define COLFMT_YUV422 3 /* 8-bit YUV (texture source only) */
51 #define COLFMT_BGR888 4 /* 24-bit BGR */
52 #define COLFMT_BGRA8888 5
53 #define COLFMT_INDEX4 6 /* 4 bit indexed colour (texture source only) */
54 #define COLFMT_INDEX8 7 /* 8-bit indexed colour (texture source only) */
55 #define COLFMT_BGR0888 8 /* 32-bit BGR */
56 #define COLFMT_RGB888 9 /* 24-bit RGB (ie GL native) */
58 /**
59 * The standard display size (for the purposes of mouse inputs, etc, is 640x480 -
60 * events should be adjusted accordingly if this is not the actual window size.
61 */
62 #define DISPLAY_WIDTH 640
63 #define DISPLAY_HEIGHT 480
65 struct colour_format {
66 GLint type, format, int_format;
67 int bpp;
68 };
69 extern struct colour_format colour_formats[];
71 extern int colour_format_bytes[];
73 /**
74 * Structure to hold pixel data held in GL buffers.
75 */
76 struct render_buffer {
77 uint32_t width;
78 uint32_t height;
79 uint32_t rowstride;
80 uint32_t colour_format;
81 sh4addr_t address; /* Address buffer was rendered to, or -1 for unrendered */
82 uint32_t size; /* Size of buffer in bytes, must be width*height*bpp */
83 gboolean inverted;/* True if the buffer is upside down */
84 uint32_t scale;
85 GLuint tex_id; /* texture bound to render buffer, if any (0 = none).
86 * The render buffer does not own the texture */
87 unsigned int buf_id; /* driver-specific buffer id, if applicable */
88 gboolean flushed; /* True if the buffer has been flushed to vram */
89 };
91 /**
92 * Structure to hold pixel data stored in pvr2 vram, as opposed to data in
93 * GL buffers.
94 */
95 struct frame_buffer {
96 uint32_t width;
97 uint32_t height;
98 uint32_t rowstride;
99 uint32_t colour_format;
100 sh4addr_t address;
101 uint32_t size; /* Size of buffer in bytes, must be width*height*bpp */
102 gboolean inverted;/* True if the buffer is upside down */
103 unsigned char *data;
104 };
106 struct display_capabilities {
107 gboolean has_gl;
108 int stencil_bits; /* 0 = no stencil buffer */
109 };
111 /**
112 * Core video driver - exports function to setup a GL context, as well as handle
113 * keyboard input and display resultant output.
114 */
115 typedef struct display_driver {
116 char *name;
117 /**
118 * Short (<60 chars) description of the driver. This should be marked for
119 * localization.
120 */
121 char *description;
122 /**
123 * Initialize the driver. This is called only once at startup time, and
124 * is guaranteed to be called before any other methods.
125 * @return TRUE if the driver was successfully initialized, otherwise
126 * FALSE.
127 */
128 gboolean (*init_driver)(void);
130 /**
131 * Cleanly shutdown the driver. Normally only called at system shutdown
132 * time.
133 */
134 void (*shutdown_driver)(void);
136 /**
137 * Given a particular keysym, return the keycode associated with it.
138 * @param keysym The keysym to be resolved, ie "Tab"
139 * @return the display-specific keycode, or 0 if the keysym cannot
140 * be resolved.
141 */
142 uint16_t (*resolve_keysym)( const gchar *keysym );
144 /**
145 * Given a native system keycode, convert it to a dreamcast keyboard code.
146 */
147 uint16_t (*convert_to_dckeysym)( uint16_t keycode );
149 /**
150 * Given a device-specific event code, return the corresponding keysym.
151 * The string should be newly allocated (caller will free)
152 */
153 gchar *(*get_keysym_for_keycode)( uint16_t keycode );
155 /**
156 * Create a render target with the given width and height. If a texture ID
157 * is supplied (non-zero), the render buffer writes its output to that texture.
158 * @param tex_id 0 or a valid GL texture name which must have been initialized to
159 * the correct dimensions.
160 */
161 render_buffer_t (*create_render_buffer)( uint32_t width, uint32_t height, GLuint tex_id );
163 /**
164 * Destroy the specified render buffer and release any associated
165 * resources.
166 */
167 void (*destroy_render_buffer)( render_buffer_t buffer );
169 /**
170 * Set the current rendering target to the specified buffer.
171 */
172 gboolean (*set_render_target)( render_buffer_t buffer );
174 /**
175 * Complete rendering and clear the current rendering target. If the
176 * buffer has a bound texture, it will be updated if necessary.
177 */
178 void (*finish_render)( render_buffer_t buffer );
180 /**
181 * Load the supplied frame buffer into the given render buffer.
182 * Included here to allow driver-specific optimizations.
183 */
184 void (*load_frame_buffer)( frame_buffer_t frame, render_buffer_t render );
186 /**
187 * Display a single frame using a previously rendered GL buffer.
188 */
189 void (*display_render_buffer)( render_buffer_t buffer );
191 /**
192 * Display a single blanked frame using a fixed colour for the
193 * entire frame (specified in BGR888 format).
194 */
195 void (*display_blank)( uint32_t rgb );
197 /**
198 * Swap front/back window buffers
199 */
200 void (*swap_buffers)();
202 /**
203 * Copy the image data from the GL buffer to the target memory buffer,
204 * using the format etc from the buffer. This may force a glFinish()
205 * but does not invalidate the buffer.
206 * @param target buffer to fill with image data, which must be large enough
207 * to accomodate the image.
208 * @param buffer Render buffer to read from.
209 * @param rowstride rowstride of the target data
210 * @param format colour format to output the data in.
211 */
212 gboolean (*read_render_buffer)( unsigned char *target, render_buffer_t buffer,
213 int rowstride, int format );
215 /**
216 * Dump driver-specific information about the implementation to the given stream
217 */
218 void (*print_info)( FILE *out );
220 struct display_capabilities capabilities;
221 } *display_driver_t;
223 /**
224 * Print the configured video drivers to the output stream, one to a line.
225 */
226 void print_display_drivers( FILE *out );
227 display_driver_t get_display_driver_by_name( const char *name );
228 gboolean display_set_driver( display_driver_t driver );
230 extern uint32_t pvr2_frame_counter;
232 extern display_driver_t display_driver;
234 extern struct display_driver display_gtk_driver;
235 extern struct display_driver display_osx_driver;
236 extern struct display_driver display_null_driver;
238 /****************** Input methods **********************/
240 #define MAX_MOUSE_BUTTONS 32
242 /* Pressure is 0..127 (allowing a joystick to be defined as two half-axes of 7- bits each) */
243 #define MAX_PRESSURE 0x7F
245 typedef key_binding_t input_key_callback_t;
247 /**
248 * Callback to receive mouse input events
249 * @param data pointer passed in at the time the hook was registered
250 * @param buttons bitmask of button states, where bit 0 is button 0 (left), bit 1 is button
251 * 1 (middle), bit 2 is button 2 (right) and so forth.
252 * @param x Horizontal movement since the last invocation (in relative mode) or window position
253 * (in absolute mode).
254 * @param y Vertical movement since the last invocation (in relative mode) or window position
255 * (in absolute mode).
256 * @param absolute If TRUE, x and y are the current window coordinates
257 * of the mouse cursor. Otherwise, x and y are deltas from the previous mouse position.
258 */
259 typedef void (*input_mouse_callback_t)( void *data, uint32_t buttons, int32_t x, int32_t y, gboolean absolute );
261 gboolean input_register_key( const gchar *keysym, input_key_callback_t callback,
262 void *data, uint32_t value );
264 void input_unregister_key( const gchar *keysym, input_key_callback_t callback,
265 void *data, uint32_t value );
267 gboolean input_register_keygroup( lxdream_config_group_t group );
268 void input_unregister_keygroup( lxdream_config_group_t group );
269 gboolean input_keygroup_changed( void *data, lxdream_config_group_t group, unsigned key,
270 const gchar *oldval, const gchar *newval );
272 /**
273 * Register a hook to receive all keyboard input events
274 */
275 gboolean input_register_keyboard_hook( input_key_callback_t callback, void *data );
276 void input_unregister_keyboard_hook( input_key_callback_t callback, void *data );
278 /**
279 * Register a mouse event hook.
280 * @param relative TRUE if the caller wants relative mouse movement, FALSE for
281 * absolute mouse positioning. It's not generally possible to receive both at the same time.
282 */
283 gboolean input_register_mouse_hook( gboolean relative, input_mouse_callback_t callback, void *data );
284 void input_unregister_mouse_hook( input_mouse_callback_t callback, void *data );
286 gboolean input_is_key_valid( const gchar *keysym );
288 gboolean input_is_key_registered( const gchar *keysym );
290 uint16_t input_keycode_to_dckeysym( uint16_t keycode );
292 /********************** Display/Input methods ***********************/
294 /**
295 * Auxilliary input driver - provides input separate to and in addition to the
296 * core UI/display. (primarily used for joystick devices)
297 */
298 typedef struct input_driver {
299 const char *id; /* Short identifier to display in the UI for the device (eg "JS0" ) */
301 /**
302 * Given a particular keysym, return the keycode associated with it.
303 * @param keysym The keysym to be resolved, ie "Tab"
304 * @return the display-specific keycode, or 0 if the keysym cannot
305 * be resolved.
306 */
307 uint16_t (*resolve_keysym)( struct input_driver *driver, const gchar *keysym );
309 /**
310 * Given a device-specific event code, convert it to a dreamcast keyboard code.
311 * This is only required for actual keyboard devices, other devices should just
312 * leave this method NULL.
313 */
314 uint16_t (*convert_to_dckeysym)( struct input_driver *driver, uint16_t keycode );
316 /**
317 * Given a device-specific event code, return the corresponding keysym.
318 * The string should be newly allocated (caller will free)
319 */
320 gchar *(*get_keysym_for_keycode)( struct input_driver *driver, uint16_t keycode );
322 /**
323 * Destroy the input driver.
324 */
325 void (*destroy)( struct input_driver *driver );
327 } *input_driver_t;
329 extern struct input_driver system_mouse_driver;
331 /**
332 * Register a new input driver (which must have a unique name)
333 * @param driver the driver to register
334 * @param max_keycode the highest possible keycode reported by the device
335 * @return TRUE on success, FALSE on failure (eg driver already registed).
336 */
337 gboolean input_register_device( input_driver_t driver, uint16_t max_keycode );
339 /**
340 * Determine if the system has an input driver with the given unique ID.
341 * @param id driver id to check
342 * @return TRUE if the device exists, otherwise FALSE
343 */
344 gboolean input_has_device( const gchar *id );
346 /**
347 * Unregister an input driver.
348 * @param driver the driver to unregister
349 * If the driver is not in fact registered, this function has no effect.
350 */
351 void input_unregister_device( input_driver_t driver );
353 /**
354 * Called from the UI to indicate that the emulation window is focused (ie
355 * able to receive input). This method is used to gate non-UI input devices -
356 * when the display is not focused, all input events will be silently ignored.
357 */
358 void display_set_focused( gboolean has_focus );
360 /**
361 * Fire a keydown event on the specified device
362 * @param input The input device source generating the event, or NULL for the
363 * default GUI device
364 * @param keycode The device-specific keycode
365 * @param pressure The pressure of the key (0 to 127), where 0 is unpressed and
366 * 127 is maximum pressure. Devices without pressure sensitivity should
367 * always use MAX_PRESSURE (127)
368 */
369 void input_event_keydown( input_driver_t input, uint16_t keycode, uint32_t pressure );
371 void input_event_keyup( input_driver_t input, uint16_t keycode );
373 /**
374 * Receive an input mouse down event. Normally these should be absolute events when
375 * the mouse is not grabbed, and relative when it is.
376 * @param button the button pressed, where 0 == first button
377 * @param x_axis The relative or absolute position of the mouse cursor on the X axis
378 * @param y_axis The relative or absolute position of the mouse cursor on the Y axis
379 * @param absolute If TRUE, x_axis and y_axis are the current window coordinates
380 * of the mouse cursor. Otherwise, x_axis and y_axis are deltas from the previous mouse position.
381 */
382 void input_event_mousedown( uint16_t button, int32_t x_axis, int32_t y_axis, gboolean absolute );
384 /**
385 * Receive an input mouse up event. Normally these should be absolute events when
386 * the mouse is not grabbed, and relative when it is.
387 * @param button the button released, where 0 == first button
388 * @param x_axis The relative or absolute position of the mouse cursor on the X axis
389 * @param y_axis The relative or absolute position of the mouse cursor on the Y axis
390 * @param absolute If TRUE, x_axis and y_axis are the current window coordinates
391 * of the mouse cursor. Otherwise, x_axis and y_axis are deltas from the previous mouse position.
392 */
393 void input_event_mouseup( uint16_t button, int32_t x_axis, int32_t y_axis, gboolean absolute );
395 /**
396 * Receive an input mouse motion event. Normally these should be absolute events when
397 * the mouse is not grabbed, and relative when it is.
398 * @param x_axis The relative or absolute position of the mouse cursor on the X axis
399 * @param y_axis The relative or absolute position of the mouse cursor on the Y axis
400 * @param absolute If TRUE, x_axis and y_axis are the current window coordinates
401 * of the mouse cursor. Otherwise, x_axis and y_axis are deltas from the previous mouse position.
402 */
403 void input_event_mousemove( int32_t x_axis, int32_t y_axis, gboolean absolute );
405 /**
406 * Given a keycode and the originating input driver, return the corresponding
407 * keysym. The caller is responsible for freeing the string.
408 * @return a newly allocated string, or NULL of the keycode is unresolvable.
409 */
410 gchar *input_keycode_to_keysym( input_driver_t driver, uint16_t keycode );
412 typedef void (*display_keysym_callback_t)( void *data, const gchar *keysym );
414 /**
415 * Set the keysym hook function (normally used by the UI to receive non-UI
416 * input events during configuration.
417 */
418 void input_set_keysym_hook( display_keysym_callback_t hook, void *data );
422 #ifdef __cplusplus
423 }
424 #endif
425 #endif /* !lxdream_display_H */
.