xf86DiDGA.c revision 35c4bbdf 
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 = xf86ScreenToScrn(pScreen);
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        num++;
55        display_mode = display_mode->next;
56        if (display_mode == scrn->modes)
57            break;
58    }
59
60    if (!num)
61        return FALSE;
62
63    modes = xallocarray(num, sizeof(DGAModeRec));
64    if (!modes)
65        return FALSE;
66
67    num = 0;
68    display_mode = scrn->modes;
69    while (display_mode) {
70        mode = modes + num++;
71
72        mode->mode = display_mode;
73        mode->flags = DGA_CONCURRENT_ACCESS;
74        if (display_mode->Flags & V_DBLSCAN)
75            mode->flags |= DGA_DOUBLESCAN;
76        if (display_mode->Flags & V_INTERLACE)
77            mode->flags |= DGA_INTERLACED;
78        mode->byteOrder = scrn->imageByteOrder;
79        mode->depth = scrn->depth;
80        mode->bitsPerPixel = scrn->bitsPerPixel;
81        mode->red_mask = scrn->mask.red;
82        mode->green_mask = scrn->mask.green;
83        mode->blue_mask = scrn->mask.blue;
84        mode->visualClass = (bpp == 1) ? PseudoColor : TrueColor;
85        mode->viewportWidth = display_mode->HDisplay;
86        mode->viewportHeight = display_mode->VDisplay;
87        mode->xViewportStep = (bpp == 3) ? 2 : 1;
88        mode->yViewportStep = 1;
89        mode->viewportFlags = DGA_FLIP_RETRACE;
90        mode->offset = 0;
91        mode->address = 0;
92        mode->imageWidth = mode->viewportWidth;
93        mode->imageHeight = mode->viewportHeight;
94        mode->bytesPerScanline = (mode->imageWidth * scrn->bitsPerPixel) >> 3;
95        mode->pixmapWidth = mode->imageWidth;
96        mode->pixmapHeight = mode->imageHeight;
97        mode->maxViewportX = 0;
98        mode->maxViewportY = 0;
99
100        display_mode = display_mode->next;
101        if (display_mode == scrn->modes)
102            break;
103    }
104    free(xf86_config->dga_modes);
105    xf86_config->dga_nmode = num;
106    xf86_config->dga_modes = modes;
107    return TRUE;
108}
109
110static Bool
111xf86_dga_set_mode(ScrnInfoPtr scrn, DGAModePtr display_mode)
112{
113    ScreenPtr pScreen = scrn->pScreen;
114    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
115
116    if (!display_mode) {
117        if (xf86_config->dga_save_mode) {
118            xf86SwitchMode(pScreen, xf86_config->dga_save_mode);
119            xf86_config->dga_save_mode = NULL;
120        }
121    }
122    else {
123        if (!xf86_config->dga_save_mode) {
124            xf86_config->dga_save_mode = scrn->currentMode;
125            xf86SwitchMode(pScreen, display_mode->mode);
126        }
127    }
128    return TRUE;
129}
130
131static int
132xf86_dga_get_viewport(ScrnInfoPtr scrn)
133{
134    return 0;
135}
136
137static void
138xf86_dga_set_viewport(ScrnInfoPtr scrn, int x, int y, int flags)
139{
140    scrn->AdjustFrame(scrn, x, y);
141}
142
143static Bool
144xf86_dga_open_framebuffer(ScrnInfoPtr scrn,
145                          char **name,
146                          unsigned char **mem, int *size, int *offset,
147                          int *flags)
148{
149    return FALSE;
150}
151
152static void
153xf86_dga_close_framebuffer(ScrnInfoPtr scrn)
154{
155}
156
157static DGAFunctionRec xf86_dga_funcs = {
158    xf86_dga_open_framebuffer,
159    xf86_dga_close_framebuffer,
160    xf86_dga_set_mode,
161    xf86_dga_set_viewport,
162    xf86_dga_get_viewport,
163    NULL,
164    NULL,
165    NULL,
166    NULL
167};
168
169Bool
170xf86DiDGAReInit(ScreenPtr pScreen)
171{
172    return TRUE;
173}
174
175Bool
176_xf86_di_dga_reinit_internal(ScreenPtr pScreen)
177{
178    ScrnInfoPtr scrn = xf86ScreenToScrn(pScreen);
179    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
180
181    if (!DGAScreenAvailable(pScreen))
182        return TRUE;
183
184    if (!xf86_dga_get_modes(pScreen))
185        return FALSE;
186
187    return DGAReInitModes(pScreen, xf86_config->dga_modes,
188                          xf86_config->dga_nmode);
189}
190
191Bool
192xf86DiDGAInit(ScreenPtr pScreen, unsigned long dga_address)
193{
194    return TRUE;
195}
196
197Bool
198_xf86_di_dga_init_internal(ScreenPtr pScreen)
199{
200    ScrnInfoPtr scrn = xf86ScreenToScrn(pScreen);
201    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
202
203    xf86_config->dga_flags = 0;
204    xf86_config->dga_address = 0;
205    xf86_config->dga_width = 0;
206    xf86_config->dga_height = 0;
207    xf86_config->dga_stride = 0;
208
209    if (!xf86_dga_get_modes(pScreen))
210        return FALSE;
211
212    return DGAInit(pScreen, &xf86_dga_funcs, xf86_config->dga_modes,
213                   xf86_config->dga_nmode);
214}
215