r300_screen.c revision 6a926f9997964df10cf77953b92d585b287c58a4 
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        case PIPE_CAP_TGSI_CONT_SUPPORTED:
149            /* XXX */
150            return 0;
151        default:
152            debug_printf("r300: Implementation error: Bad param %d\n",
153                param);
154            return 0;
155    }
156}
157
158static float r300_get_paramf(struct pipe_screen* pscreen, int param)
159{
160    struct r300_screen* r300screen = r300_screen(pscreen);
161
162    switch (param) {
163        case PIPE_CAP_MAX_LINE_WIDTH:
164        case PIPE_CAP_MAX_LINE_WIDTH_AA:
165        case PIPE_CAP_MAX_POINT_WIDTH:
166        case PIPE_CAP_MAX_POINT_WIDTH_AA:
167            /* The maximum dimensions of the colorbuffer are our practical
168             * rendering limits. 2048 pixels should be enough for anybody. */
169            if (r300screen->caps->is_r500) {
170                return 4096.0f;
171            } else {
172                return 2048.0f;
173            }
174        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
175            return 16.0f;
176        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
177            return 16.0f;
178        default:
179            debug_printf("r300: Implementation error: Bad paramf %d\n",
180                param);
181            return 0.0f;
182    }
183}
184
185static boolean check_tex_2d_format(enum pipe_format format, boolean is_r500)
186{
187    switch (format) {
188        /* Colorbuffer */
189        case PIPE_FORMAT_A4R4G4B4_UNORM:
190        case PIPE_FORMAT_R5G6B5_UNORM:
191        case PIPE_FORMAT_A1R5G5B5_UNORM:
192        case PIPE_FORMAT_A8R8G8B8_UNORM:
193        /* Colorbuffer or texture */
194        case PIPE_FORMAT_I8_UNORM:
195        /* Z buffer */
196        case PIPE_FORMAT_Z16_UNORM:
197        /* Z buffer with stencil */
198        case PIPE_FORMAT_Z24S8_UNORM:
199            return TRUE;
200
201        /* XXX These don't even exist
202        case PIPE_FORMAT_A32R32G32B32:
203        case PIPE_FORMAT_A16R16G16B16: */
204        /* XXX Insert YUV422 packed VYUY and YVYU here */
205        /* XXX What the deuce is UV88? (r3xx accel page 14)
206            debug_printf("r300: Warning: Got unimplemented format: %s in %s\n",
207                pf_name(format), __FUNCTION__);
208            return FALSE; */
209
210        /* XXX Supported yet unimplemented r5xx formats: */
211        /* XXX Again, what is UV1010 this time? (r5xx accel page 148) */
212        /* XXX Even more that don't exist
213        case PIPE_FORMAT_A10R10G10B10_UNORM:
214        case PIPE_FORMAT_A2R10G10B10_UNORM:
215        case PIPE_FORMAT_I10_UNORM:
216            debug_printf(
217                "r300: Warning: Got unimplemented r500 format: %s in %s\n",
218                pf_name(format), __FUNCTION__);
219            return FALSE; */
220
221        default:
222            debug_printf("r300: Warning: Got unsupported format: %s in %s\n",
223                pf_name(format), __FUNCTION__);
224            break;
225    }
226
227    return FALSE;
228}
229
230/* XXX moar targets */
231static boolean r300_is_format_supported(struct pipe_screen* pscreen,
232                                        enum pipe_format format,
233                                        enum pipe_texture_target target,
234                                        unsigned tex_usage,
235                                        unsigned geom_flags)
236{
237    switch (target) {
238        case PIPE_TEXTURE_2D:
239            return check_tex_2d_format(format,
240                r300_screen(pscreen)->caps->is_r500);
241        case PIPE_TEXTURE_1D:
242        case PIPE_TEXTURE_3D:
243        case PIPE_TEXTURE_CUBE:
244            debug_printf("r300: Implementation error: Unsupported format "
245                    "target: %d\n", target);
246            break;
247        default:
248            debug_printf("r300: Fatal: This is not a format target: %d\n",
249                target);
250            assert(0);
251            break;
252    }
253
254    return FALSE;
255}
256
257static struct pipe_transfer*
258r300_get_tex_transfer(struct pipe_screen *screen,
259                      struct pipe_texture *texture,
260                      unsigned face, unsigned level, unsigned zslice,
261                      enum pipe_transfer_usage usage, unsigned x, unsigned y,
262                      unsigned w, unsigned h)
263{
264    struct r300_texture *tex = (struct r300_texture *)texture;
265    struct r300_transfer *trans;
266    unsigned offset;  /* in bytes */
267
268    /* XXX Add support for these things */
269    if (texture->target == PIPE_TEXTURE_CUBE) {
270        debug_printf("PIPE_TEXTURE_CUBE is not yet supported.\n");
271        /* offset = tex->image_offset[level][face]; */
272    }
273    else if (texture->target == PIPE_TEXTURE_3D) {
274        debug_printf("PIPE_TEXTURE_3D is not yet supported.\n");
275        /* offset = tex->image_offset[level][zslice]; */
276    }
277    else {
278        offset = tex->offset[level];
279        assert(face == 0);
280        assert(zslice == 0);
281    }
282
283    trans = CALLOC_STRUCT(r300_transfer);
284    if (trans) {
285        pipe_texture_reference(&trans->transfer.texture, texture);
286        trans->transfer.format = trans->transfer.format;
287        trans->transfer.width = w;
288        trans->transfer.height = h;
289        trans->transfer.block = texture->block;
290        trans->transfer.nblocksx = texture->nblocksx[level];
291        trans->transfer.nblocksy = texture->nblocksy[level];
292        trans->transfer.stride = tex->stride;
293        trans->transfer.usage = usage;
294        trans->offset = offset;
295    }
296    return &trans->transfer;
297}
298
299static void
300r300_tex_transfer_destroy(struct pipe_transfer *trans)
301{
302   pipe_texture_reference(&trans->texture, NULL);
303   FREE(trans);
304}
305
306static void* r300_transfer_map(struct pipe_screen* screen,
307                              struct pipe_transfer* transfer)
308{
309    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
310    char* map;
311    unsigned flags = 0;
312
313    if (transfer->usage != PIPE_TRANSFER_WRITE) {
314        flags |= PIPE_BUFFER_USAGE_CPU_READ;
315    }
316    if (transfer->usage != PIPE_TRANSFER_READ) {
317        flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
318    }
319
320    map = pipe_buffer_map(screen, tex->buffer, flags);
321
322    if (!map) {
323        return NULL;
324    }
325
326    return map + r300_transfer(transfer)->offset +
327        transfer->y / transfer->block.height * transfer->stride +
328        transfer->x / transfer->block.width * transfer->block.size;
329}
330
331static void r300_transfer_unmap(struct pipe_screen* screen,
332                                struct pipe_transfer* transfer)
333{
334    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
335    pipe_buffer_unmap(screen, tex->buffer);
336}
337
338static void r300_destroy_screen(struct pipe_screen* pscreen)
339{
340    struct r300_screen* r300screen = r300_screen(pscreen);
341
342    FREE(r300screen->caps);
343    FREE(r300screen);
344}
345
346struct pipe_screen* r300_create_screen(struct r300_winsys* r300_winsys)
347{
348    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
349    struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
350
351    if (!r300screen || !caps)
352        return NULL;
353
354    caps->pci_id = r300_winsys->pci_id;
355
356    r300_parse_chipset(caps);
357
358    r300screen->caps = caps;
359    r300screen->screen.winsys = (struct pipe_winsys*)r300_winsys;
360    r300screen->screen.destroy = r300_destroy_screen;
361    r300screen->screen.get_name = r300_get_name;
362    r300screen->screen.get_vendor = r300_get_vendor;
363    r300screen->screen.get_param = r300_get_param;
364    r300screen->screen.get_paramf = r300_get_paramf;
365    r300screen->screen.is_format_supported = r300_is_format_supported;
366    r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
367    r300screen->screen.tex_transfer_destroy = r300_tex_transfer_destroy;
368    r300screen->screen.transfer_map = r300_transfer_map;
369    r300screen->screen.transfer_unmap = r300_transfer_unmap;
370
371    r300_init_screen_texture_functions(&r300screen->screen);
372    u_simple_screen_init(&r300screen->screen);
373
374    return &r300screen->screen;
375}
376