r300_screen.c revision 6fb364a1717858d8201b2caf234076ce5d4832ac 
1/*
2 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
3 * Copyright 2010 Marek Olšák <maraeo@gmail.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
23
24#include "util/u_format.h"
25#include "util/u_memory.h"
26
27#include "r300_context.h"
28#include "r300_texture.h"
29#include "r300_screen_buffer.h"
30#include "r300_winsys.h"
31
32/* Return the identifier behind whom the brave coders responsible for this
33 * amalgamation of code, sweat, and duct tape, routinely obscure their names.
34 *
35 * ...I should have just put "Corbin Simpson", but I'm not that cool.
36 *
37 * (Or egotistical. Yet.) */
38static const char* r300_get_vendor(struct pipe_screen* pscreen)
39{
40    return "X.Org R300 Project";
41}
42
43static const char* chip_families[] = {
44    "R300",
45    "R350",
46    "R360",
47    "RV350",
48    "RV370",
49    "RV380",
50    "R420",
51    "R423",
52    "R430",
53    "R480",
54    "R481",
55    "RV410",
56    "RS400",
57    "RC410",
58    "RS480",
59    "RS482",
60    "RS600",
61    "RS690",
62    "RS740",
63    "RV515",
64    "R520",
65    "RV530",
66    "R580",
67    "RV560",
68    "RV570"
69};
70
71static const char* r300_get_name(struct pipe_screen* pscreen)
72{
73    struct r300_screen* r300screen = r300_screen(pscreen);
74
75    return chip_families[r300screen->caps->family];
76}
77
78static int r300_get_param(struct pipe_screen* pscreen, int param)
79{
80    struct r300_screen* r300screen = r300_screen(pscreen);
81
82    switch (param) {
83        case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
84        case PIPE_CAP_MAX_COMBINED_SAMPLERS:
85            /* XXX I'm told this goes up to 16 */
86            return 8;
87        case PIPE_CAP_NPOT_TEXTURES:
88            /* XXX enable now to get GL2.1 API,
89             * figure out later how to emulate this */
90            return 1;
91        case PIPE_CAP_TWO_SIDED_STENCIL:
92            if (r300screen->caps->is_r500) {
93                return 1;
94            } else {
95                return 0;
96            }
97        case PIPE_CAP_GLSL:
98            /* I'll be frank. This is a lie.
99             *
100             * We don't truly support GLSL on any of this driver's chipsets.
101             * To be fair, no chipset supports the full GLSL specification
102             * to the best of our knowledge, but some of the less esoteric
103             * features are still missing here.
104             *
105             * Rather than cripple ourselves intentionally, I'm going to set
106             * this flag, and as Gallium's interface continues to change, I
107             * hope that this single monolithic GLSL enable can slowly get
108             * split down into many different pieces and the state tracker
109             * will handle fallbacks transparently, like it should.
110             *
111             * ~ C.
112             */
113            return 1;
114        case PIPE_CAP_DUAL_SOURCE_BLEND:
115            return 0;
116        case PIPE_CAP_ANISOTROPIC_FILTER:
117            return 1;
118        case PIPE_CAP_POINT_SPRITE:
119            return 1;
120        case PIPE_CAP_MAX_RENDER_TARGETS:
121            return 4;
122        case PIPE_CAP_OCCLUSION_QUERY:
123            return 1;
124        case PIPE_CAP_TEXTURE_SHADOW_MAP:
125            return 1;
126        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
127        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
128        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
129            if (r300screen->caps->is_r500) {
130                /* 13 == 4096 */
131                return 13;
132            } else {
133                /* 12 == 2048 */
134                return 12;
135            }
136        case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
137            return 1;
138        case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
139            return 1;
140        case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
141            return 0;
142        case PIPE_CAP_TGSI_CONT_SUPPORTED:
143            return 0;
144        case PIPE_CAP_BLEND_EQUATION_SEPARATE:
145            return 1;
146        case PIPE_CAP_SM3:
147            if (r300screen->caps->is_r500) {
148                return 1;
149            } else {
150                return 0;
151            }
152        case PIPE_CAP_MAX_CONST_BUFFERS:
153            return 1;
154        case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
155            return 256;
156        case PIPE_CAP_INDEP_BLEND_ENABLE:
157            return 0;
158        case PIPE_CAP_INDEP_BLEND_FUNC:
159            return 0;
160        case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
161        case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
162	    return 1;
163        case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
164        case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
165            return 0;
166        default:
167            fprintf(stderr, "r300: Implementation error: Bad param %d\n",
168                param);
169            return 0;
170    }
171}
172
173static float r300_get_paramf(struct pipe_screen* pscreen, int param)
174{
175    struct r300_screen* r300screen = r300_screen(pscreen);
176
177    switch (param) {
178        case PIPE_CAP_MAX_LINE_WIDTH:
179        case PIPE_CAP_MAX_LINE_WIDTH_AA:
180        case PIPE_CAP_MAX_POINT_WIDTH:
181        case PIPE_CAP_MAX_POINT_WIDTH_AA:
182            /* The maximum dimensions of the colorbuffer are our practical
183             * rendering limits. 2048 pixels should be enough for anybody. */
184            if (r300screen->caps->is_r500) {
185                return 4096.0f;
186            } else if (r300screen->caps->is_r400) {
187                return 4021.0f;
188            } else {
189                return 2560.0f;
190            }
191        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
192            return 16.0f;
193        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
194            return 16.0f;
195        default:
196            fprintf(stderr, "r300: Implementation error: Bad paramf %d\n",
197                param);
198            return 0.0f;
199    }
200}
201
202static boolean r300_is_format_supported(struct pipe_screen* screen,
203                                        enum pipe_format format,
204                                        enum pipe_texture_target target,
205                                        unsigned usage,
206                                        unsigned geom_flags)
207{
208    uint32_t retval = 0;
209    boolean is_r500 = r300_screen(screen)->caps->is_r500;
210    boolean is_z24 = format == PIPE_FORMAT_X8Z24_UNORM ||
211                     format == PIPE_FORMAT_S8_USCALED_Z24_UNORM;
212    boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM;
213
214    if (target >= PIPE_MAX_TEXTURE_TYPES) {
215        fprintf(stderr, "r300: Implementation error: Received bogus texture "
216            "target %d in %s\n", target, __FUNCTION__);
217        return FALSE;
218    }
219
220    /* Check sampler format support. */
221    if ((usage & PIPE_TEXTURE_USAGE_SAMPLER) &&
222        /* Z24 cannot be sampled from on non-r5xx. */
223        (is_r500 || !is_z24) &&
224        r300_is_sampler_format_supported(format)) {
225        retval |= PIPE_TEXTURE_USAGE_SAMPLER;
226    }
227
228    /* Check colorbuffer format support. */
229    if ((usage & (PIPE_TEXTURE_USAGE_RENDER_TARGET |
230                  PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
231                  PIPE_TEXTURE_USAGE_SCANOUT |
232                  PIPE_TEXTURE_USAGE_SHARED)) &&
233        /* 2101010 cannot be rendered to on non-r5xx. */
234        (is_r500 || !is_color2101010) &&
235        r300_is_colorbuffer_format_supported(format)) {
236        retval |= usage &
237            (PIPE_TEXTURE_USAGE_RENDER_TARGET |
238             PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
239             PIPE_TEXTURE_USAGE_SCANOUT |
240             PIPE_TEXTURE_USAGE_SHARED);
241    }
242
243    /* Check depth-stencil format support. */
244    if (usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL &&
245        r300_is_zs_format_supported(format)) {
246        retval |= PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
247    }
248
249    return retval == usage;
250}
251
252static void r300_destroy_screen(struct pipe_screen* pscreen)
253{
254    struct r300_screen* r300screen = r300_screen(pscreen);
255    struct r300_winsys_screen *rws = r300_winsys_screen(pscreen);
256
257    if (rws)
258      rws->destroy(rws);
259
260    FREE(r300screen->caps);
261    FREE(r300screen);
262}
263
264struct pipe_screen* r300_create_screen(struct r300_winsys_screen *rws)
265{
266    struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
267    struct r300_capabilities *caps = CALLOC_STRUCT(r300_capabilities);
268
269    if (!r300screen || !caps) {
270        FREE(r300screen);
271        FREE(caps);
272        return NULL;
273    }
274
275    caps->pci_id = rws->get_value(rws, R300_VID_PCI_ID);
276    caps->num_frag_pipes = rws->get_value(rws, R300_VID_GB_PIPES);
277    caps->num_z_pipes = rws->get_value(rws, R300_VID_Z_PIPES);
278
279    r300_init_debug(r300screen);
280    r300_parse_chipset(caps);
281
282    r300screen->caps = caps;
283    r300screen->rws = rws;
284    r300screen->screen.winsys = (struct pipe_winsys*)rws;
285    r300screen->screen.destroy = r300_destroy_screen;
286    r300screen->screen.get_name = r300_get_name;
287    r300screen->screen.get_vendor = r300_get_vendor;
288    r300screen->screen.get_param = r300_get_param;
289    r300screen->screen.get_paramf = r300_get_paramf;
290    r300screen->screen.is_format_supported = r300_is_format_supported;
291    r300screen->screen.context_create = r300_create_context;
292
293    r300_init_screen_texture_functions(&r300screen->screen);
294
295    r300_screen_init_buffer_functions(r300screen);
296    return &r300screen->screen;
297}
298
299struct r300_winsys_screen *
300r300_winsys_screen(struct pipe_screen *screen)
301{
302    return r300_screen(screen)->rws;
303}
304