4 * The PC side of the video support (responsible for actually displaying /
7 * Copyright (c) 2005 Nathan Keynes.
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.
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.
27 #include <OpenGL/gl.h>
28 #include <OpenGL/glext.h>
39 * Supported colour formats. Note that BGRA4444 is only ever used for texture
40 * rendering (it's not valid for display purposes).
42 #define COLFMT_BGRA1555 0
43 #define COLFMT_RGB565 1
44 #define COLFMT_BGRA4444 2
45 #define COLFMT_YUV422 3 /* 8-bit YUV (texture source only) */
46 #define COLFMT_BGR888 4 /* 24-bit BGR */
47 #define COLFMT_BGRA8888 5
48 #define COLFMT_INDEX4 6 /* 4 bit indexed colour (texture source only) */
49 #define COLFMT_INDEX8 7 /* 8-bit indexed colour (texture source only) */
50 #define COLFMT_BGR0888 8 /* 32-bit BGR */
51 #define COLFMT_RGB888 9 /* 24-bit RGB (ie GL native) */
53 struct colour_format {
54 GLint type, format, int_format;
57 extern struct colour_format colour_formats[];
59 extern int colour_format_bytes[];
62 * Structure to hold pixel data held in GL buffers.
64 struct render_buffer {
69 sh4addr_t address; /* Address buffer was rendered to, or -1 for unrendered */
70 uint32_t size; /* Size of buffer in bytes, must be width*height*bpp */
71 gboolean inverted;/* True if the buffer is upside down */
73 unsigned int buf_id; /* driver-specific buffer id, if applicable */
74 gboolean flushed; /* True if the buffer has been flushed to vram */
78 * Structure to hold pixel data stored in pvr2 vram, as opposed to data in
87 uint32_t size; /* Size of buffer in bytes, must be width*height*bpp */
88 gboolean inverted;/* True if the buffer is upside down */
93 * Core video driver - exports function to setup a GL context, as well as handle
94 * keyboard input and display resultant output.
96 typedef struct display_driver {
99 * Initialize the driver. This is called only once at startup time, and
100 * is guaranteed to be called before any other methods.
101 * @return TRUE if the driver was successfully initialized, otherwise
104 gboolean (*init_driver)(void);
107 * Cleanly shutdown the driver. Normally only called at system shutdown
110 void (*shutdown_driver)(void);
113 * Given a particular keysym, return the keycode associated with it.
114 * @param keysym The keysym to be resolved, ie "Tab"
115 * @return the display-specific keycode, or 0 if the keysym cannot
118 uint16_t (*resolve_keysym)( const gchar *keysym );
121 * Create a render target with the given width and height.
123 render_buffer_t (*create_render_buffer)( uint32_t width, uint32_t height );
126 * Destroy the specified render buffer and release any associated
129 void (*destroy_render_buffer)( render_buffer_t buffer );
132 * Set the current rendering target to the specified buffer.
134 gboolean (*set_render_target)( render_buffer_t buffer );
137 * Load the supplied frame buffer into the given render buffer.
138 * Included here to allow driver-specific optimizations.
140 void (*load_frame_buffer)( frame_buffer_t frame, render_buffer_t render );
143 * Display a single frame using a previously rendered GL buffer.
145 gboolean (*display_render_buffer)( render_buffer_t buffer );
148 * Display a single blanked frame using a fixed colour for the
149 * entire frame (specified in BGR888 format).
151 gboolean (*display_blank)( uint32_t rgb );
154 * Copy the image data from the GL buffer to the target memory buffer,
155 * using the format etc from the buffer. This may force a glFinish()
156 * but does not invalidate the buffer.
157 * @param target buffer to fill with image data, which must be large enough
158 * to accomodate the image.
159 * @param buffer Render buffer to read from.
160 * @param rowstride rowstride of the target data
161 * @param format colour format to output the data in.
163 gboolean (*read_render_buffer)( unsigned char *target, render_buffer_t buffer,
164 int rowstride, int format );
168 display_driver_t get_display_driver_by_name( const char *name );
169 gboolean display_set_driver( display_driver_t driver );
171 extern uint32_t pvr2_frame_counter;
173 extern display_driver_t display_driver;
175 extern struct display_driver display_agl_driver;
176 extern struct display_driver display_gtk_driver;
177 extern struct display_driver display_null_driver;
179 /****************** Input methods **********************/
181 typedef void (*input_key_callback_t)( void *data, uint32_t value, gboolean isKeyDown );
183 gboolean input_register_key( const gchar *keysym, input_key_callback_t callback,
184 void *data, uint32_t value );
186 void input_unregister_key( const gchar *keysym, input_key_callback_t callback,
187 void *data, uint32_t value );
189 gboolean input_is_key_valid( const gchar *keysym );
191 gboolean input_is_key_registered( const gchar *keysym );
193 void input_event_keydown( uint16_t keycode );
195 void input_event_keyup( uint16_t keycode );
.