r300_screen.c revision 928a5684177fdb6cd013949348aee6078dd305c0 
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            return 1;
98        case PIPE_CAP_ANISOTROPIC_FILTER:
99            return 1;
100        case PIPE_CAP_POINT_SPRITE:
101            /* IN THEORY */
102            return 0;
103        case PIPE_CAP_MAX_RENDER_TARGETS:
104            return 4;
105        case PIPE_CAP_OCCLUSION_QUERY:
106            /* IN THEORY */
107            return 0;
108        case PIPE_CAP_TEXTURE_SHADOW_MAP:
109            /* IN THEORY */
110            return 0;
111        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
112            if (r300screen->caps->is_r500) {
113                /* 13 == 4096x4096 */
114                return 13;
115            } else {
116                /* 12 == 2048x2048 */
117                return 12;
118            }
119        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
120            /* So, technically, the limit is the same as above, but some math
121             * shows why this is silly. Assuming RGBA, 4cpp, we can see that
122             * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
123             * practical. However, if at some point a game really wants this,
124             * then we can remove or raise this limit. */
125            if (r300screen->caps->is_r500) {
126                /* 9 == 256x256x256 */
127                return 9;
128            } else {
129                /* 8 == 128*128*128 */
130                return 8;
131            }
132        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
133            if (r300screen->caps->is_r500) {
134                /* 13 == 4096x4096 */
135                return 13;
136            } else {
137                /* 12 == 2048x2048 */
138                return 12;
139            }
140        case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
141            return 1;
142        case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
143            return 1;
144        case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
145            /* XXX guessing (what a terrible guess) */
146            return 2;
147        case PIPE_CAP_TGSI_CONT_SUPPORTED:
148            /* XXX */
149            return 0;
150        default:
151            debug_printf("r300: Implementation error: Bad param %d\n",
152                param);
153            return 0;
154    }
155}
156
157static float r300_get_paramf(struct pipe_screen* pscreen, int param)
158{
159    struct r300_screen* r300screen = r300_screen(pscreen);
160
161    switch (param) {
162        case PIPE_CAP_MAX_LINE_WIDTH:
163        case PIPE_CAP_MAX_LINE_WIDTH_AA:
164        case PIPE_CAP_MAX_POINT_WIDTH:
165        case PIPE_CAP_MAX_POINT_WIDTH_AA:
166            /* The maximum dimensions of the colorbuffer are our practical
167             * rendering limits. 2048 pixels should be enough for anybody. */
168            if (r300screen->caps->is_r500) {
169                return 4096.0f;
170            } else {
171                return 2048.0f;
172            }
173        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
174            return 16.0f;
175        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
176            return 16.0f;
177        default:
178            debug_printf("r300: Implementation error: Bad paramf %d\n",
179                param);
180            return 0.0f;
181    }
182}
183
184static boolean check_tex_2d_format(enum pipe_format format, uint32_t usage,
185                                   boolean is_r500)
186{
187    switch (format) {
188        /* Supported formats. */
189        /* Colorbuffer */
190        case PIPE_FORMAT_A4R4G4B4_UNORM:
191        case PIPE_FORMAT_R5G6B5_UNORM:
192        case PIPE_FORMAT_A1R5G5B5_UNORM:
193            return usage &
194                (PIPE_TEXTURE_USAGE_RENDER_TARGET |
195                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
196                 PIPE_TEXTURE_USAGE_PRIMARY);
197
198        /* Texture */
199        case PIPE_FORMAT_A8R8G8B8_SRGB:
200        case PIPE_FORMAT_R8G8B8A8_SRGB:
201        case PIPE_FORMAT_DXT1_RGB:
202        case PIPE_FORMAT_DXT1_RGBA:
203        case PIPE_FORMAT_DXT3_RGBA:
204        case PIPE_FORMAT_DXT5_RGBA:
205        case PIPE_FORMAT_YCBCR:
206            return usage & PIPE_TEXTURE_USAGE_SAMPLER;
207
208        /* Colorbuffer or texture */
209        case PIPE_FORMAT_A8R8G8B8_UNORM:
210        case PIPE_FORMAT_R8G8B8A8_UNORM:
211        case PIPE_FORMAT_I8_UNORM:
212            return usage &
213                (PIPE_TEXTURE_USAGE_RENDER_TARGET |
214                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
215                 PIPE_TEXTURE_USAGE_PRIMARY |
216                 PIPE_TEXTURE_USAGE_SAMPLER);
217
218        /* Z buffer */
219        case PIPE_FORMAT_Z16_UNORM:
220            return usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
221
222        /* Z buffer with stencil or texture */
223        case PIPE_FORMAT_Z24S8_UNORM:
224            return usage &
225                (PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
226                 PIPE_TEXTURE_USAGE_SAMPLER);
227
228        /* Definitely unsupported formats. */
229        /* Non-usable Z buffer/stencil formats. */
230        case PIPE_FORMAT_Z24X8_UNORM:
231        case PIPE_FORMAT_S8Z24_UNORM:
232        case PIPE_FORMAT_X8Z24_UNORM:
233            debug_printf("r300: Note: Got unsupported format: %s in %s\n",
234                pf_name(format), __FUNCTION__);
235            return FALSE;
236
237        /* XXX These don't even exist
238        case PIPE_FORMAT_A32R32G32B32:
239        case PIPE_FORMAT_A16R16G16B16: */
240        /* XXX Insert YUV422 packed VYUY and YVYU here */
241        /* XXX What the deuce is UV88? (r3xx accel page 14)
242            debug_printf("r300: Warning: Got unimplemented format: %s in %s\n",
243                pf_name(format), __FUNCTION__);
244            return FALSE; */
245
246        /* XXX Supported yet unimplemented r5xx formats: */
247        /* XXX Again, what is UV1010 this time? (r5xx accel page 148) */
248        /* XXX Even more that don't exist
249        case PIPE_FORMAT_A10R10G10B10_UNORM:
250        case PIPE_FORMAT_A2R10G10B10_UNORM:
251        case PIPE_FORMAT_I10_UNORM:
252            debug_printf(
253                "r300: Warning: Got unimplemented r500 format: %s in %s\n",
254                pf_name(format), __FUNCTION__);
255            return FALSE; */
256
257        default:
258            /* Unknown format... */
259            debug_printf("r300: Warning: Got unknown format: %s in %s\n",
260                pf_name(format), __FUNCTION__);
261            break;
262    }
263
264    return FALSE;
265}
266
267/* XXX moar targets */
268static boolean r300_is_format_supported(struct pipe_screen* pscreen,
269                                        enum pipe_format format,
270                                        enum pipe_texture_target target,
271                                        unsigned tex_usage,
272                                        unsigned geom_flags)
273{
274    switch (target) {
275        case PIPE_TEXTURE_2D:
276            return check_tex_2d_format(format, tex_usage,
277                r300_screen(pscreen)->caps->is_r500);
278        case PIPE_TEXTURE_1D:
279        case PIPE_TEXTURE_3D:
280        case PIPE_TEXTURE_CUBE:
281            debug_printf("r300: Implementation error: Unsupported format "
282                    "target: %d\n", target);
283            break;
284        default:
285            debug_printf("r300: Fatal: This is not a format target: %d\n",
286                target);
287            assert(0);
288            break;
289    }
290
291    return FALSE;
292}
293
294static struct pipe_transfer*
295r300_get_tex_transfer(struct pipe_screen *screen,
296                      struct pipe_texture *texture,
297                      unsigned face, unsigned level, unsigned zslice,
298                      enum pipe_transfer_usage usage, unsigned x, unsigned y,
299                      unsigned w, unsigned h)
300{
301    struct r300_texture *tex = (struct r300_texture *)texture;
302    struct r300_transfer *trans;
303    unsigned offset;  /* in bytes */
304
305    /* XXX Add support for these things */
306    if (texture->target == PIPE_TEXTURE_CUBE) {
307        debug_printf("PIPE_TEXTURE_CUBE is not yet supported.\n");
308        /* offset = tex->image_offset[level][face]; */
309    }
310    else if (texture->target == PIPE_TEXTURE_3D) {
311        debug_printf("PIPE_TEXTURE_3D is not yet supported.\n");
312        /* offset = tex->image_offset[level][zslice]; */
313    }
314    else {
315        offset = tex->offset[level];
316        assert(face == 0);
317        assert(zslice == 0);
318    }
319
320    trans = CALLOC_STRUCT(r300_transfer);
321    if (trans) {
322        pipe_texture_reference(&trans->transfer.texture, texture);
323        trans->transfer.format = trans->transfer.format;
324        trans->transfer.width = w;
325        trans->transfer.height = h;
326        trans->transfer.block = texture->block;
327        trans->transfer.nblocksx = texture->nblocksx[level];
328        trans->transfer.nblocksy = texture->nblocksy[level];
329        trans->transfer.stride = tex->stride;
330        trans->transfer.usage = usage;
331        trans->offset = offset;
332    }
333    return &trans->transfer;
334}
335
336static void
337r300_tex_transfer_destroy(struct pipe_transfer *trans)
338{
339   pipe_texture_reference(&trans->texture, NULL);
340   FREE(trans);
341}
342
343static void* r300_transfer_map(struct pipe_screen* screen,
344                              struct pipe_transfer* transfer)
345{
346    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
347    char* map;
348    unsigned flags = 0;
349
350    if (transfer->usage != PIPE_TRANSFER_WRITE) {
351        flags |= PIPE_BUFFER_USAGE_CPU_READ;
352    }
353    if (transfer->usage != PIPE_TRANSFER_READ) {
354        flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
355    }
356
357    map = pipe_buffer_map(screen, tex->buffer, flags);
358
359    if (!map) {
360        return NULL;
361    }
362
363    return map + r300_transfer(transfer)->offset +
364        transfer->y / transfer->block.height * transfer->stride +
365        transfer->x / transfer->block.width * transfer->block.size;
366}
367
368static void r300_transfer_unmap(struct pipe_screen* screen,
369                                struct pipe_transfer* transfer)
370{
371    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
372    pipe_buffer_unmap(screen, tex->buffer);
373}
374
375static void r300_destroy_screen(struct pipe_screen* pscreen)
376{
377    struct r300_screen* r300screen = r300_screen(pscreen);
378
379    FREE(r300screen->caps);
380    FREE(r300screen);
381}
382
383struct pipe_screen* r300_create_screen(struct r300_winsys* r300_winsys)
384{
385    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
386    struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
387
388    if (!r300screen || !caps)
389        return NULL;
390
391    caps->pci_id = r300_winsys->pci_id;
392
393    r300_parse_chipset(caps);
394
395    r300screen->caps = caps;
396    r300screen->screen.winsys = (struct pipe_winsys*)r300_winsys;
397    r300screen->screen.destroy = r300_destroy_screen;
398    r300screen->screen.get_name = r300_get_name;
399    r300screen->screen.get_vendor = r300_get_vendor;
400    r300screen->screen.get_param = r300_get_param;
401    r300screen->screen.get_paramf = r300_get_paramf;
402    r300screen->screen.is_format_supported = r300_is_format_supported;
403    r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
404    r300screen->screen.tex_transfer_destroy = r300_tex_transfer_destroy;
405    r300screen->screen.transfer_map = r300_transfer_map;
406    r300screen->screen.transfer_unmap = r300_transfer_unmap;
407
408    r300_init_screen_texture_functions(&r300screen->screen);
409    u_simple_screen_init(&r300screen->screen);
410
411    return &r300screen->screen;
412}
413