r300_screen.c revision 6a40d1e9d96f8e8c57bc3bbd6f567cacd4471f59 
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            /* IN THEORY */
92            return 0;
93        case PIPE_CAP_S3TC:
94            /* IN THEORY */
95            return 0;
96        case PIPE_CAP_ANISOTROPIC_FILTER:
97            return 1;
98        case PIPE_CAP_POINT_SPRITE:
99            /* IN THEORY */
100            return 0;
101        case PIPE_CAP_MAX_RENDER_TARGETS:
102            return 4;
103        case PIPE_CAP_OCCLUSION_QUERY:
104            /* IN THEORY */
105            return 0;
106        case PIPE_CAP_TEXTURE_SHADOW_MAP:
107            /* IN THEORY */
108            return 0;
109        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
110            if (r300screen->caps->is_r500) {
111                /* 13 == 4096x4096 */
112                return 13;
113            } else {
114                /* 12 == 2048x2048 */
115                return 12;
116            }
117        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
118            /* So, technically, the limit is the same as above, but some math
119             * shows why this is silly. Assuming RGBA, 4cpp, we can see that
120             * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
121             * practical. However, if at some point a game really wants this,
122             * then we can remove or raise this limit. */
123            if (r300screen->caps->is_r500) {
124                /* 9 == 256x256x256 */
125                return 9;
126            } else {
127                /* 8 == 128*128*128 */
128                return 8;
129            }
130        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
131            if (r300screen->caps->is_r500) {
132                /* 13 == 4096x4096 */
133                return 13;
134            } else {
135                /* 12 == 2048x2048 */
136                return 12;
137            }
138        case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
139            return 1;
140        case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
141            return 1;
142        case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
143            /* XXX guessing (what a terrible guess) */
144            return 2;
145        default:
146            debug_printf("r300: Implementation error: Bad param %d\n",
147                param);
148            return 0;
149    }
150}
151
152static float r300_get_paramf(struct pipe_screen* pscreen, int param)
153{
154    struct r300_screen* r300screen = r300_screen(pscreen);
155
156    switch (param) {
157        case PIPE_CAP_MAX_LINE_WIDTH:
158        case PIPE_CAP_MAX_LINE_WIDTH_AA:
159        case PIPE_CAP_MAX_POINT_WIDTH:
160        case PIPE_CAP_MAX_POINT_WIDTH_AA:
161            /* The maximum dimensions of the colorbuffer are our practical
162             * rendering limits. 2048 pixels should be enough for anybody. */
163            if (r300screen->caps->is_r500) {
164                return 4096.0f;
165            } else {
166                return 2048.0f;
167            }
168        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
169            return 16.0f;
170        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
171            return 16.0f;
172        default:
173            debug_printf("r300: Implementation error: Bad paramf %d\n",
174                param);
175            return 0.0f;
176    }
177}
178
179static boolean check_tex_2d_format(enum pipe_format format, boolean is_r500)
180{
181    switch (format) {
182        /* Colorbuffer */
183        case PIPE_FORMAT_A4R4G4B4_UNORM:
184        case PIPE_FORMAT_R5G6B5_UNORM:
185        case PIPE_FORMAT_A1R5G5B5_UNORM:
186        case PIPE_FORMAT_A8R8G8B8_UNORM:
187        /* Colorbuffer or texture */
188        case PIPE_FORMAT_I8_UNORM:
189        /* Z buffer */
190        case PIPE_FORMAT_Z16_UNORM:
191        /* Z buffer with stencil */
192        case PIPE_FORMAT_Z24S8_UNORM:
193            return TRUE;
194
195        /* XXX These don't even exist
196        case PIPE_FORMAT_A32R32G32B32:
197        case PIPE_FORMAT_A16R16G16B16: */
198        /* XXX Insert YUV422 packed VYUY and YVYU here */
199        /* XXX What the deuce is UV88? (r3xx accel page 14)
200            debug_printf("r300: Warning: Got unimplemented format: %s in %s\n",
201                pf_name(format), __FUNCTION__);
202            return FALSE; */
203
204        /* XXX Supported yet unimplemented r5xx formats: */
205        /* XXX Again, what is UV1010 this time? (r5xx accel page 148) */
206        /* XXX Even more that don't exist
207        case PIPE_FORMAT_A10R10G10B10_UNORM:
208        case PIPE_FORMAT_A2R10G10B10_UNORM:
209        case PIPE_FORMAT_I10_UNORM:
210            debug_printf(
211                "r300: Warning: Got unimplemented r500 format: %s in %s\n",
212                pf_name(format), __FUNCTION__);
213            return FALSE; */
214
215        default:
216            debug_printf("r300: Warning: Got unsupported format: %s in %s\n",
217                pf_name(format), __FUNCTION__);
218            break;
219    }
220
221    return FALSE;
222}
223
224/* XXX moar targets */
225static boolean r300_is_format_supported(struct pipe_screen* pscreen,
226                                        enum pipe_format format,
227                                        enum pipe_texture_target target,
228                                        unsigned tex_usage,
229                                        unsigned geom_flags)
230{
231    switch (target) {
232        case PIPE_TEXTURE_2D:
233            return check_tex_2d_format(format,
234                r300_screen(pscreen)->caps->is_r500);
235        case PIPE_TEXTURE_1D:
236        case PIPE_TEXTURE_3D:
237        case PIPE_TEXTURE_CUBE:
238            debug_printf("r300: Implementation error: Unsupported format "
239                    "target: %d\n", target);
240            break;
241        default:
242            debug_printf("r300: Fatal: This is not a format target: %d\n",
243                target);
244            assert(0);
245            break;
246    }
247
248    return FALSE;
249}
250
251static struct pipe_transfer*
252r300_get_tex_transfer(struct pipe_screen *screen,
253                      struct pipe_texture *texture,
254                      unsigned face, unsigned level, unsigned zslice,
255                      enum pipe_transfer_usage usage, unsigned x, unsigned y,
256                      unsigned w, unsigned h)
257{
258    struct r300_texture *tex = (struct r300_texture *)texture;
259    struct r300_transfer *trans;
260    unsigned offset;  /* in bytes */
261
262    /* XXX Add support for these things */
263    if (texture->target == PIPE_TEXTURE_CUBE) {
264        debug_printf("PIPE_TEXTURE_CUBE is not yet supported.\n");
265        /* offset = tex->image_offset[level][face]; */
266    }
267    else if (texture->target == PIPE_TEXTURE_3D) {
268        debug_printf("PIPE_TEXTURE_3D is not yet supported.\n");
269        /* offset = tex->image_offset[level][zslice]; */
270    }
271    else {
272        offset = tex->offset[level];
273        assert(face == 0);
274        assert(zslice == 0);
275    }
276
277    trans = CALLOC_STRUCT(r300_transfer);
278    if (trans) {
279        pipe_texture_reference(&trans->transfer.texture, texture);
280        trans->transfer.format = trans->transfer.format;
281        trans->transfer.width = w;
282        trans->transfer.height = h;
283        trans->transfer.block = texture->block;
284        trans->transfer.nblocksx = texture->nblocksx[level];
285        trans->transfer.nblocksy = texture->nblocksy[level];
286        trans->transfer.stride = tex->stride;
287        trans->transfer.usage = usage;
288        trans->offset = offset;
289    }
290    return &trans->transfer;
291}
292
293static void
294r300_tex_transfer_destroy(struct pipe_transfer *trans)
295{
296   pipe_texture_reference(&trans->texture, NULL);
297   FREE(trans);
298}
299
300static void* r300_transfer_map(struct pipe_screen* screen,
301                              struct pipe_transfer* transfer)
302{
303    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
304    char* map;
305    unsigned flags = 0;
306
307    if (transfer->usage != PIPE_TRANSFER_WRITE) {
308        flags |= PIPE_BUFFER_USAGE_CPU_READ;
309    }
310    if (transfer->usage != PIPE_TRANSFER_READ) {
311        flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
312    }
313
314    map = pipe_buffer_map(screen, tex->buffer, flags);
315
316    if (!map) {
317        return NULL;
318    }
319
320    return map + r300_transfer(transfer)->offset +
321        transfer->y / transfer->block.height * transfer->stride +
322        transfer->x / transfer->block.width * transfer->block.size;
323}
324
325static void r300_transfer_unmap(struct pipe_screen* screen,
326                                struct pipe_transfer* transfer)
327{
328    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
329    pipe_buffer_unmap(screen, tex->buffer);
330}
331
332static void r300_destroy_screen(struct pipe_screen* pscreen)
333{
334    struct r300_screen* r300screen = r300_screen(pscreen);
335
336    FREE(r300screen->caps);
337    FREE(r300screen);
338}
339
340struct pipe_screen* r300_create_screen(struct r300_winsys* r300_winsys)
341{
342    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
343    struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
344
345    if (!r300screen || !caps)
346        return NULL;
347
348    caps->pci_id = r300_winsys->pci_id;
349
350    r300_parse_chipset(caps);
351
352    r300screen->caps = caps;
353    r300screen->screen.winsys = (struct pipe_winsys*)r300_winsys;
354    r300screen->screen.destroy = r300_destroy_screen;
355    r300screen->screen.get_name = r300_get_name;
356    r300screen->screen.get_vendor = r300_get_vendor;
357    r300screen->screen.get_param = r300_get_param;
358    r300screen->screen.get_paramf = r300_get_paramf;
359    r300screen->screen.is_format_supported = r300_is_format_supported;
360    r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
361    r300screen->screen.tex_transfer_destroy = r300_tex_transfer_destroy;
362    r300screen->screen.transfer_map = r300_transfer_map;
363    r300screen->screen.transfer_unmap = r300_transfer_unmap;
364
365    r300_init_screen_texture_functions(&r300screen->screen);
366    u_simple_screen_init(&r300screen->screen);
367
368    return &r300screen->screen;
369}
370