r300_screen.c revision 3b37cb49b821dd0c59fd5361ada6c0df9ac07db8 
1/*
2 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
22
23#include "r300_screen.h"
24
25static const char* r300_get_vendor(struct pipe_screen* pscreen) {
26    return "X.Org R300 Project";
27}
28
29static const char* r300_get_name(struct pipe_screen* pscreen) {
30    /* XXX lazy */
31    return "unknown";
32}
33
34static int r300_get_param(struct pipe_screen* pscreen, int param) {
35    struct r300_screen* r300screen = r300_screen(pscreen);
36
37    switch (param) {
38        /* Cases marked "IN THEORY" are possible on the hardware,
39         * but haven't been implemented yet. */
40        case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
41            /* XXX I'm told this goes up to 16 */
42            return 8;
43        case PIPE_CAP_NPOT_TEXTURES:
44            /* IN THEORY */
45            return 0;
46        case PIPE_CAP_S3TC:
47            /* IN THEORY */
48            return 0;
49        case PIPE_CAP_TWO_SIDED_STENCIL:
50            /* IN THEORY */
51            return 0;
52        case PIPE_CAP_ANISOTROPIC_FILTER:
53            /* IN THEORY */
54            return 0;
55        case PIPE_CAP_POINT_SPRITE:
56            /* IN THEORY */
57            return 0;
58        case PIPE_CAP_OCCLUSION_QUERY:
59            /* IN THEORY */
60            return 0;
61        case PIPE_CAP_TEXTURE_SHADOW_MAP:
62            /* IN THEORY */
63            return 0;
64        case PIPE_CAP_GLSL:
65            /* IN THEORY */
66            return 0;
67        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
68            /* 12 == 2048x2048 */
69            if (r300screen->is_r500) {
70                /* R500 can do 4096x4096 */
71                return 13;
72            } else {
73                return 12;
74            }
75        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
76            /* XXX educated guess */
77            return 8;
78        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
79            /* XXX educated guess */
80            return 11;
81        case PIPE_CAP_MAX_RENDER_TARGETS:
82            /* XXX 4 eventually */
83            return 1;
84        default:
85            return 0;
86    }
87}
88
89static float r300_get_paramf(struct pipe_screen* pscreen, int param) {
90    switch (param) {
91        case PIPE_CAP_MAX_LINE_WIDTH:
92        case PIPE_CAP_MAX_LINE_WIDTH_AA:
93            /* XXX look this up, lazy ass! */
94            return 0.0;
95        case PIPE_CAP_MAX_POINT_WIDTH:
96        case PIPE_CAP_MAX_POINT_WIDTH_AA:
97            /* XXX see above */
98            return 255.0;
99        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
100            return 16.0;
101        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
102            /* XXX again... */
103            return 16.0;
104        default:
105            return 0.0;
106    }
107}
108
109static boolean r300_is_format_supported(struct pipe_screen* pscreen,
110                                        enum pipe_format format,
111                                        enum pipe_texture_target target,
112                                        unsigned tex_usage,
113                                        unsigned geom_flags)
114{
115    return FALSE;
116}
117
118static void* r300_surface_map(struct pipe_screen* screen,
119                              struct pipe_surface* surface,
120                              unsigned flags)
121{
122    /* XXX is this all we need to do here? */
123    char* map = pipe_buffer_map(screen, surface->buffer, flags);
124
125    if (!map) {
126        return NULL;
127    }
128
129    return map + surface->offset;
130}
131
132static void r300_surface_unmap(struct pipe_screen* screen,
133                               struct pipe_surface* surface)
134{
135    pipe_buffer_unmap(screen, surface->buffer);
136}
137
138static void r300_destroy_screen(struct pipe_screen* pscreen) {
139    FREE(pscreen);
140}
141
142struct pipe_screen* r300_create_screen(struct pipe_winsys* winsys, uint pci_id) {
143    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
144
145    if (!r300screen)
146        return NULL;
147
148    /* XXX break this into its own function? */
149    switch (pci_id) {
150        default:
151            debug_printf("%s: unknown PCI ID 0x%x, cannot create screen!\n",
152                         __FUNCTION__, pci_id);
153            return NULL;
154    }
155
156    r300screen->pci_id = pci_id;
157    r300screen->screen.winsys = winsys;
158    r300screen->screen.destroy = r300_destroy_screen;
159    r300screen->screen.get_name = r300_get_name;
160    r300screen->screen.get_vendor = r300_get_vendor;
161    r300screen->screen.get_param = r300_get_param;
162    r300screen->screen.get_paramf = r300_get_paramf;
163    r300screen->screen.is_format_supported = r300_is_format_supported;
164    r300screen->screen.surface_map = r300_surface_map;
165    r300screen->screen.surface_unmap = r300_surface_unmap;
166
167    return &r300screen->screen;
168}
169