r300_screen.c revision 54d137e079b9420e8aca55f37307ece45e9b71d8 
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{
27    return "X.Org R300 Project";
28}
29
30static const char* r300_get_name(struct pipe_screen* pscreen)
31{
32    struct r300_screen* r300screen = r300_screen(pscreen);
33
34    return chip_families[r300screen->caps->family];
35}
36
37static int r300_get_param(struct pipe_screen* pscreen, int param)
38{
39    struct r300_screen* r300screen = r300_screen(pscreen);
40
41    switch (param) {
42        /* XXX cases marked "IN THEORY" are possible on the hardware,
43         * but haven't been implemented yet. */
44        case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
45            /* XXX I'm told this goes up to 16 */
46            return 8;
47        case PIPE_CAP_NPOT_TEXTURES:
48            /* IN THEORY */
49            return 0;
50        case PIPE_CAP_S3TC:
51            /* IN THEORY */
52            return 0;
53        case PIPE_CAP_TWO_SIDED_STENCIL:
54            /* IN THEORY */
55            /* if (r300screen->is_r500) {
56             * return 1;
57             * } else {
58             * return 0;
59             * } */
60            return 0;
61        case PIPE_CAP_ANISOTROPIC_FILTER:
62            /* IN THEORY */
63            return 0;
64        case PIPE_CAP_POINT_SPRITE:
65            /* IN THEORY */
66            return 0;
67        case PIPE_CAP_OCCLUSION_QUERY:
68            /* IN THEORY */
69            return 0;
70        case PIPE_CAP_TEXTURE_SHADOW_MAP:
71            /* IN THEORY */
72            return 0;
73        case PIPE_CAP_GLSL:
74            /* IN THEORY */
75            return 0;
76        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
77            /* 12 == 2048x2048 */
78            return 12;
79        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
80            /* XXX educated guess */
81            return 8;
82        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
83            /* XXX educated guess */
84            return 11;
85        case PIPE_CAP_MAX_RENDER_TARGETS:
86            /* XXX 4 eventually */
87            return 1;
88        default:
89            return 0;
90    }
91}
92
93static float r300_get_paramf(struct pipe_screen* pscreen, int param)
94{
95    switch (param) {
96        case PIPE_CAP_MAX_LINE_WIDTH:
97        case PIPE_CAP_MAX_LINE_WIDTH_AA:
98            /* XXX look this up, lazy ass! */
99            return 0.0;
100        case PIPE_CAP_MAX_POINT_WIDTH:
101        case PIPE_CAP_MAX_POINT_WIDTH_AA:
102            /* XXX see above */
103            return 255.0;
104        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
105            return 16.0;
106        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
107            return 16.0;
108        default:
109            return 0.0;
110    }
111}
112
113static boolean r300_is_format_supported(struct pipe_screen* pscreen,
114                                        enum pipe_format format,
115                                        enum pipe_texture_target target,
116                                        unsigned tex_usage,
117                                        unsigned geom_flags)
118{
119    return FALSE;
120}
121
122static void* r300_surface_map(struct pipe_screen* screen,
123                              struct pipe_surface* surface,
124                              unsigned flags)
125{
126    char* map = pipe_buffer_map(screen, surface->buffer, flags);
127
128    if (!map) {
129        return NULL;
130    }
131
132    return map + surface->offset;
133}
134
135static void r300_surface_unmap(struct pipe_screen* screen,
136                               struct pipe_surface* surface)
137{
138    pipe_buffer_unmap(screen, surface->buffer);
139}
140
141static void r300_destroy_screen(struct pipe_screen* pscreen)
142{
143    struct r300_screen* r300screen = r300_screen(pscreen);
144
145    FREE(r300screen->caps);
146    FREE(r300screen);
147}
148
149struct pipe_screen* r300_create_screen(struct pipe_winsys* winsys, uint32_t pci_id)
150{
151    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
152    struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
153
154    if (!r300screen || !caps)
155        return NULL;
156
157    r300_parse_chipset(pci_id, caps);
158
159    r300screen->caps = caps;
160    r300screen->screen.winsys = winsys;
161    r300screen->screen.destroy = r300_destroy_screen;
162    r300screen->screen.get_name = r300_get_name;
163    r300screen->screen.get_vendor = r300_get_vendor;
164    r300screen->screen.get_param = r300_get_param;
165    r300screen->screen.get_paramf = r300_get_paramf;
166    r300screen->screen.is_format_supported = r300_is_format_supported;
167    r300screen->screen.surface_map = r300_surface_map;
168    r300screen->screen.surface_unmap = r300_surface_unmap;
169
170    return &r300screen->screen;
171}
172