r300_screen.c revision 27206add2738f9813d1e9f42fe3b1bdfbd9b8aa4 
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
25/* Return the identifier behind whom the brave coders responsible for this
26 * amalgamation of code, sweat, and duct tape, routinely obscure their names.
27 *
28 * ...I should have just put "Corbin Simpson", but I'm not that cool.
29 *
30 * (Or egotistical. Yet.) */
31static const char* r300_get_vendor(struct pipe_screen* pscreen)
32{
33    return "X.Org R300 Project";
34}
35
36static const char* chip_families[] = {
37    "R300",
38    "R350",
39    "R360",
40    "RV350",
41    "RV370",
42    "RV380",
43    "R420",
44    "R423",
45    "R430",
46    "R480",
47    "R481",
48    "RV410",
49    "RS400",
50    "RC410",
51    "RS480",
52    "RS482",
53    "RS600",
54    "RS690",
55    "RS740",
56    "RV515",
57    "R520",
58    "RV530",
59    "R580",
60    "RV560",
61    "RV570"
62};
63
64static const char* r300_get_name(struct pipe_screen* pscreen)
65{
66    struct r300_screen* r300screen = r300_screen(pscreen);
67
68    return chip_families[r300screen->caps->family];
69}
70
71static int r300_get_param(struct pipe_screen* pscreen, int param)
72{
73    struct r300_screen* r300screen = r300_screen(pscreen);
74
75    switch (param) {
76        /* XXX cases marked "IN THEORY" are possible on the hardware,
77         * but haven't been implemented yet. */
78        case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
79            /* XXX I'm told this goes up to 16 */
80            return 8;
81        case PIPE_CAP_NPOT_TEXTURES:
82            /* IN THEORY */
83            return 0;
84        case PIPE_CAP_TWO_SIDED_STENCIL:
85            if (r300screen->caps->is_r500) {
86                return 1;
87            } else {
88                return 0;
89            }
90        case PIPE_CAP_GLSL:
91            if (r300screen->caps->is_r500) {
92                return 1;
93            } else {
94                return 0;
95            }
96        case PIPE_CAP_S3TC:
97            /* IN THEORY */
98            return 0;
99        case PIPE_CAP_ANISOTROPIC_FILTER:
100            return 1;
101        case PIPE_CAP_POINT_SPRITE:
102            /* IN THEORY */
103            return 0;
104        case PIPE_CAP_MAX_RENDER_TARGETS:
105            return 4;
106        case PIPE_CAP_OCCLUSION_QUERY:
107            /* IN THEORY */
108            return 0;
109        case PIPE_CAP_TEXTURE_SHADOW_MAP:
110            /* IN THEORY */
111            return 0;
112        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
113            if (r300screen->caps->is_r500) {
114                /* 13 == 4096x4096 */
115                return 13;
116            } else {
117                /* 12 == 2048x2048 */
118                return 12;
119            }
120        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
121            /* So, technically, the limit is the same as above, but some math
122             * shows why this is silly. Assuming RGBA, 4cpp, we can see that
123             * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
124             * practical. However, if at some point a game really wants this,
125             * then we can remove or raise this limit. */
126            if (r300screen->caps->is_r500) {
127                /* 9 == 256x256x256 */
128                return 9;
129            } else {
130                /* 8 == 128*128*128 */
131                return 8;
132            }
133        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
134            if (r300screen->caps->is_r500) {
135                /* 13 == 4096x4096 */
136                return 13;
137            } else {
138                /* 12 == 2048x2048 */
139                return 12;
140            }
141        case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
142            return 1;
143        case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
144            return 1;
145        case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
146            /* XXX guessing (what a terrible guess) */
147            return 2;
148        default:
149            debug_printf("r300: Implementation error: Bad param %d\n",
150                param);
151            return 0;
152    }
153}
154
155static float r300_get_paramf(struct pipe_screen* pscreen, int param)
156{
157    struct r300_screen* r300screen = r300_screen(pscreen);
158
159    switch (param) {
160        case PIPE_CAP_MAX_LINE_WIDTH:
161        case PIPE_CAP_MAX_LINE_WIDTH_AA:
162        case PIPE_CAP_MAX_POINT_WIDTH:
163        case PIPE_CAP_MAX_POINT_WIDTH_AA:
164            /* The maximum dimensions of the colorbuffer are our practical
165             * rendering limits. 2048 pixels should be enough for anybody. */
166            if (r300screen->caps->is_r500) {
167                return 4096.0f;
168            } else {
169                return 2048.0f;
170            }
171        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
172            return 16.0f;
173        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
174            return 16.0f;
175        default:
176            debug_printf("r300: Implementation error: Bad paramf %d\n",
177                param);
178            return 0.0f;
179    }
180}
181
182static boolean check_tex_2d_format(enum pipe_format format, boolean is_r500)
183{
184    switch (format) {
185        /* Colorbuffer */
186        case PIPE_FORMAT_A4R4G4B4_UNORM:
187        case PIPE_FORMAT_R5G6B5_UNORM:
188        case PIPE_FORMAT_A1R5G5B5_UNORM:
189        case PIPE_FORMAT_A8R8G8B8_UNORM:
190        /* Colorbuffer or texture */
191        case PIPE_FORMAT_I8_UNORM:
192        /* Z buffer */
193        case PIPE_FORMAT_Z16_UNORM:
194        /* Z buffer with stencil */
195        case PIPE_FORMAT_Z24S8_UNORM:
196            return TRUE;
197
198        /* XXX These don't even exist
199        case PIPE_FORMAT_A32R32G32B32:
200        case PIPE_FORMAT_A16R16G16B16: */
201        /* XXX Insert YUV422 packed VYUY and YVYU here */
202        /* XXX What the deuce is UV88? (r3xx accel page 14)
203            debug_printf("r300: Warning: Got unimplemented format: %s in %s\n",
204                pf_name(format), __FUNCTION__);
205            return FALSE; */
206
207        /* XXX Supported yet unimplemented r5xx formats: */
208        /* XXX Again, what is UV1010 this time? (r5xx accel page 148) */
209        /* XXX Even more that don't exist
210        case PIPE_FORMAT_A10R10G10B10_UNORM:
211        case PIPE_FORMAT_A2R10G10B10_UNORM:
212        case PIPE_FORMAT_I10_UNORM:
213            debug_printf(
214                "r300: Warning: Got unimplemented r500 format: %s in %s\n",
215                pf_name(format), __FUNCTION__);
216            return FALSE; */
217
218        default:
219            debug_printf("r300: Warning: Got unsupported format: %s in %s\n",
220                pf_name(format), __FUNCTION__);
221            break;
222    }
223
224    return FALSE;
225}
226
227/* XXX moar targets */
228static boolean r300_is_format_supported(struct pipe_screen* pscreen,
229                                        enum pipe_format format,
230                                        enum pipe_texture_target target,
231                                        unsigned tex_usage,
232                                        unsigned geom_flags)
233{
234    switch (target) {
235        case PIPE_TEXTURE_2D:
236            return check_tex_2d_format(format,
237                r300_screen(pscreen)->caps->is_r500);
238        case PIPE_TEXTURE_1D:
239        case PIPE_TEXTURE_3D:
240        case PIPE_TEXTURE_CUBE:
241            debug_printf("r300: Implementation error: Unsupported format "
242                    "target: %d\n", target);
243            break;
244        default:
245            debug_printf("r300: Fatal: This is not a format target: %d\n",
246                target);
247            assert(0);
248            break;
249    }
250
251    return FALSE;
252}
253
254static struct pipe_transfer*
255r300_get_tex_transfer(struct pipe_screen *screen,
256                      struct pipe_texture *texture,
257                      unsigned face, unsigned level, unsigned zslice,
258                      enum pipe_transfer_usage usage, unsigned x, unsigned y,
259                      unsigned w, unsigned h)
260{
261    struct r300_texture *tex = (struct r300_texture *)texture;
262    struct r300_transfer *trans;
263    unsigned offset;  /* in bytes */
264
265    /* XXX Add support for these things */
266    if (texture->target == PIPE_TEXTURE_CUBE) {
267        debug_printf("PIPE_TEXTURE_CUBE is not yet supported.\n");
268        /* offset = tex->image_offset[level][face]; */
269    }
270    else if (texture->target == PIPE_TEXTURE_3D) {
271        debug_printf("PIPE_TEXTURE_3D is not yet supported.\n");
272        /* offset = tex->image_offset[level][zslice]; */
273    }
274    else {
275        offset = tex->offset[level];
276        assert(face == 0);
277        assert(zslice == 0);
278    }
279
280    trans = CALLOC_STRUCT(r300_transfer);
281    if (trans) {
282        pipe_texture_reference(&trans->transfer.texture, texture);
283        trans->transfer.format = trans->transfer.format;
284        trans->transfer.width = w;
285        trans->transfer.height = h;
286        trans->transfer.block = texture->block;
287        trans->transfer.nblocksx = texture->nblocksx[level];
288        trans->transfer.nblocksy = texture->nblocksy[level];
289        trans->transfer.stride = tex->stride;
290        trans->transfer.usage = usage;
291        trans->offset = offset;
292    }
293    return &trans->transfer;
294}
295
296static void
297r300_tex_transfer_destroy(struct pipe_transfer *trans)
298{
299   pipe_texture_reference(&trans->texture, NULL);
300   FREE(trans);
301}
302
303static void* r300_transfer_map(struct pipe_screen* screen,
304                              struct pipe_transfer* transfer)
305{
306    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
307    char* map;
308    unsigned flags = 0;
309
310    if (transfer->usage != PIPE_TRANSFER_WRITE) {
311        flags |= PIPE_BUFFER_USAGE_CPU_READ;
312    }
313    if (transfer->usage != PIPE_TRANSFER_READ) {
314        flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
315    }
316
317    map = pipe_buffer_map(screen, tex->buffer, flags);
318
319    if (!map) {
320        return NULL;
321    }
322
323    return map + r300_transfer(transfer)->offset +
324        transfer->y / transfer->block.height * transfer->stride +
325        transfer->x / transfer->block.width * transfer->block.size;
326}
327
328static void r300_transfer_unmap(struct pipe_screen* screen,
329                                struct pipe_transfer* transfer)
330{
331    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
332    pipe_buffer_unmap(screen, tex->buffer);
333}
334
335static void r300_destroy_screen(struct pipe_screen* pscreen)
336{
337    struct r300_screen* r300screen = r300_screen(pscreen);
338
339    FREE(r300screen->caps);
340    FREE(r300screen);
341}
342
343struct pipe_screen* r300_create_screen(struct r300_winsys* r300_winsys)
344{
345    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
346    struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
347
348    if (!r300screen || !caps)
349        return NULL;
350
351    caps->pci_id = r300_winsys->pci_id;
352
353    r300_parse_chipset(caps);
354
355    r300screen->caps = caps;
356    r300screen->screen.winsys = (struct pipe_winsys*)r300_winsys;
357    r300screen->screen.destroy = r300_destroy_screen;
358    r300screen->screen.get_name = r300_get_name;
359    r300screen->screen.get_vendor = r300_get_vendor;
360    r300screen->screen.get_param = r300_get_param;
361    r300screen->screen.get_paramf = r300_get_paramf;
362    r300screen->screen.is_format_supported = r300_is_format_supported;
363    r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
364    r300screen->screen.tex_transfer_destroy = r300_tex_transfer_destroy;
365    r300screen->screen.transfer_map = r300_transfer_map;
366    r300screen->screen.transfer_unmap = r300_transfer_unmap;
367
368    r300_init_screen_texture_functions(&r300screen->screen);
369    u_simple_screen_init(&r300screen->screen);
370
371    return &r300screen->screen;
372}
373