xf86DiDGA.c revision b1d344b3 
1/*
2 * Copyright © 2006 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission.  The copyright holders make no representations
11 * about the suitability of this software for any purpose.  It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#ifdef HAVE_XORG_CONFIG_H
24#include <xorg-config.h>
25#else
26#ifdef HAVE_CONFIG_H
27#include <config.h>
28#endif
29#endif
30
31#include "xf86.h"
32#include "xf86DDC.h"
33#include "xf86_OSproc.h"
34#include "dgaproc.h"
35#include "xf86Crtc.h"
36#include "xf86Modes.h"
37#include "gcstruct.h"
38#include "scrnintstr.h"
39#include "windowstr.h"
40
41static Bool
42xf86_dga_get_modes (ScreenPtr pScreen)
43{
44    ScrnInfoPtr		scrn = xf86Screens[pScreen->myNum];
45    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
46    DGAModePtr		modes, mode;
47    DisplayModePtr	display_mode;
48    int			bpp = scrn->bitsPerPixel >> 3;
49    int			num;
50
51    num = 0;
52    display_mode = scrn->modes;
53    while (display_mode)
54    {
55	num++;
56	display_mode = display_mode->next;
57	if (display_mode == scrn->modes)
58	    break;
59    }
60
61    if (!num)
62	return FALSE;
63
64    modes = xalloc(num * sizeof(DGAModeRec));
65    if (!modes)
66	return FALSE;
67
68    num = 0;
69    display_mode = scrn->modes;
70    while (display_mode)
71    {
72	mode = modes + num++;
73
74	mode->mode = display_mode;
75	mode->flags = DGA_CONCURRENT_ACCESS;
76	if (display_mode->Flags & V_DBLSCAN)
77	    mode->flags |= DGA_DOUBLESCAN;
78	if (display_mode->Flags & V_INTERLACE)
79	    mode->flags |= DGA_INTERLACED;
80	mode->byteOrder = scrn->imageByteOrder;
81	mode->depth = scrn->depth;
82	mode->bitsPerPixel = scrn->bitsPerPixel;
83	mode->red_mask = scrn->mask.red;
84	mode->green_mask = scrn->mask.green;
85	mode->blue_mask = scrn->mask.blue;
86	mode->visualClass = (bpp == 1) ? PseudoColor : TrueColor;
87	mode->viewportWidth = display_mode->HDisplay;
88	mode->viewportHeight = display_mode->VDisplay;
89	mode->xViewportStep = (bpp == 3) ? 2 : 1;
90	mode->yViewportStep = 1;
91	mode->viewportFlags = DGA_FLIP_RETRACE;
92	mode->offset = 0;
93	mode->address = 0;
94	mode->imageWidth = mode->viewportWidth;
95	mode->imageHeight = mode->viewportHeight;
96	mode->bytesPerScanline = (mode->imageWidth * scrn->bitsPerPixel) >> 3;
97	mode->pixmapWidth = mode->imageWidth;
98	mode->pixmapHeight = mode->imageHeight;
99	mode->maxViewportX = 0;
100	mode->maxViewportY = 0;
101
102	display_mode = display_mode->next;
103	if (display_mode == scrn->modes)
104	    break;
105    }
106    if (xf86_config->dga_modes)
107	xfree (xf86_config->dga_modes);
108    xf86_config->dga_nmode = num;
109    xf86_config->dga_modes = modes;
110    return TRUE;
111}
112
113static Bool
114xf86_dga_set_mode(ScrnInfoPtr scrn, DGAModePtr display_mode)
115{
116    ScreenPtr		pScreen = scrn->pScreen;
117    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
118
119    if (!display_mode)
120    {
121	if (xf86_config->dga_save_mode)
122	{
123	    xf86SwitchMode(pScreen, xf86_config->dga_save_mode);
124	    xf86_config->dga_save_mode = NULL;
125	}
126    }
127    else
128    {
129	if (!xf86_config->dga_save_mode)
130	{
131	    xf86_config->dga_save_mode = scrn->currentMode;
132	    xf86SwitchMode(pScreen, display_mode->mode);
133	}
134    }
135    return TRUE;
136}
137
138static int
139xf86_dga_get_viewport(ScrnInfoPtr scrn)
140{
141    return 0;
142}
143
144static void
145xf86_dga_set_viewport(ScrnInfoPtr scrn, int x, int y, int flags)
146{
147   scrn->AdjustFrame(scrn->pScreen->myNum, x, y, flags);
148}
149
150static Bool
151xf86_dga_open_framebuffer(ScrnInfoPtr scrn,
152			  char **name,
153			  unsigned char **mem, int *size, int *offset, int *flags)
154{
155    return FALSE;
156}
157
158static void
159xf86_dga_close_framebuffer(ScrnInfoPtr scrn)
160{
161}
162
163static DGAFunctionRec xf86_dga_funcs = {
164   xf86_dga_open_framebuffer,
165   xf86_dga_close_framebuffer,
166   xf86_dga_set_mode,
167   xf86_dga_set_viewport,
168   xf86_dga_get_viewport,
169   NULL,
170   NULL,
171   NULL,
172   NULL
173};
174
175_X_EXPORT Bool
176xf86DiDGAReInit (ScreenPtr pScreen)
177{
178    return TRUE;
179}
180
181Bool
182_xf86_di_dga_reinit_internal (ScreenPtr pScreen)
183{
184    ScrnInfoPtr		scrn = xf86Screens[pScreen->myNum];
185    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
186
187    if (!DGAAvailable(pScreen->myNum))
188	return TRUE;
189
190    if (!xf86_dga_get_modes (pScreen))
191	return FALSE;
192
193    return DGAReInitModes (pScreen, xf86_config->dga_modes, xf86_config->dga_nmode);
194}
195
196_X_EXPORT Bool
197xf86DiDGAInit (ScreenPtr pScreen, unsigned long dga_address)
198{
199    return TRUE;
200}
201
202Bool
203_xf86_di_dga_init_internal (ScreenPtr pScreen)
204{
205    ScrnInfoPtr		scrn = xf86Screens[pScreen->myNum];
206    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
207
208    xf86_config->dga_flags = 0;
209    xf86_config->dga_address = 0;
210    xf86_config->dga_width = 0;
211    xf86_config->dga_height = 0;
212    xf86_config->dga_stride = 0;
213
214    if (!xf86_dga_get_modes (pScreen))
215	return FALSE;
216
217    return DGAInit(pScreen, &xf86_dga_funcs, xf86_config->dga_modes, xf86_config->dga_nmode);
218}
219