r300_screen.c revision 4a49301e 
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 "pipe/p_inlines.h"
24#include "util/u_memory.h"
25#include "util/u_simple_screen.h"
26
27#include "r300_context.h"
28#include "r300_screen.h"
29#include "r300_texture.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            /* XXX I'm told this goes up to 16 */
85            return 8;
86        case PIPE_CAP_NPOT_TEXTURES:
87            /* XXX enable now to get GL2.1 API,
88             * figure out later how to emulate this */
89            return 1;
90        case PIPE_CAP_TWO_SIDED_STENCIL:
91            if (r300screen->caps->is_r500) {
92                return 1;
93            } else {
94                return 0;
95            }
96        case PIPE_CAP_GLSL:
97            /* I'll be frank. This is a lie.
98             *
99             * We don't truly support GLSL on any of this driver's chipsets.
100             * To be fair, no chipset supports the full GLSL specification
101             * to the best of our knowledge, but some of the less esoteric
102             * features are still missing here.
103             *
104             * Rather than cripple ourselves intentionally, I'm going to set
105             * this flag, and as Gallium's interface continues to change, I
106             * hope that this single monolithic GLSL enable can slowly get
107             * split down into many different pieces and the state tracker
108             * will handle fallbacks transparently, like it should.
109             *
110             * ~ C.
111             */
112            return 1;
113        case PIPE_CAP_ANISOTROPIC_FILTER:
114            return 1;
115        case PIPE_CAP_POINT_SPRITE:
116            return 1;
117        case PIPE_CAP_MAX_RENDER_TARGETS:
118            return 4;
119        case PIPE_CAP_OCCLUSION_QUERY:
120            return 1;
121        case PIPE_CAP_TEXTURE_SHADOW_MAP:
122            return 1;
123        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
124        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
125        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
126            if (r300screen->caps->is_r500) {
127                /* 13 == 4096 */
128                return 13;
129            } else {
130                /* 12 == 2048 */
131                return 12;
132            }
133        case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
134            return 1;
135        case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
136            return 1;
137        case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
138            return 0;
139        case PIPE_CAP_TGSI_CONT_SUPPORTED:
140            return 0;
141        case PIPE_CAP_BLEND_EQUATION_SEPARATE:
142            return 1;
143        default:
144            debug_printf("r300: Implementation error: Bad param %d\n",
145                param);
146            return 0;
147    }
148}
149
150static float r300_get_paramf(struct pipe_screen* pscreen, int param)
151{
152    struct r300_screen* r300screen = r300_screen(pscreen);
153
154    switch (param) {
155        case PIPE_CAP_MAX_LINE_WIDTH:
156        case PIPE_CAP_MAX_LINE_WIDTH_AA:
157        case PIPE_CAP_MAX_POINT_WIDTH:
158        case PIPE_CAP_MAX_POINT_WIDTH_AA:
159            /* The maximum dimensions of the colorbuffer are our practical
160             * rendering limits. 2048 pixels should be enough for anybody. */
161            if (r300screen->caps->is_r500) {
162                return 4096.0f;
163            } else {
164                return 2048.0f;
165            }
166        case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
167            return 16.0f;
168        case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
169            return 16.0f;
170        default:
171            debug_printf("r300: Implementation error: Bad paramf %d\n",
172                param);
173            return 0.0f;
174    }
175}
176
177static boolean check_tex_format(enum pipe_format format, uint32_t usage,
178                                boolean is_r500)
179{
180    uint32_t retval = 0;
181
182    switch (format) {
183        /* Supported formats. */
184        /* Colorbuffer */
185        case PIPE_FORMAT_A4R4G4B4_UNORM:
186        case PIPE_FORMAT_R5G6B5_UNORM:
187        case PIPE_FORMAT_A1R5G5B5_UNORM:
188            retval = usage &
189                (PIPE_TEXTURE_USAGE_RENDER_TARGET |
190                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
191                 PIPE_TEXTURE_USAGE_PRIMARY);
192            break;
193
194        /* Texture */
195        case PIPE_FORMAT_A8R8G8B8_SRGB:
196        case PIPE_FORMAT_R8G8B8A8_SRGB:
197        case PIPE_FORMAT_DXT1_RGB:
198        case PIPE_FORMAT_DXT1_RGBA:
199        case PIPE_FORMAT_DXT3_RGBA:
200        case PIPE_FORMAT_DXT5_RGBA:
201        case PIPE_FORMAT_YCBCR:
202        case PIPE_FORMAT_L8_UNORM:
203        case PIPE_FORMAT_A8L8_UNORM:
204            retval = usage & PIPE_TEXTURE_USAGE_SAMPLER;
205            break;
206
207        /* Colorbuffer or texture */
208        case PIPE_FORMAT_A8R8G8B8_UNORM:
209        case PIPE_FORMAT_X8R8G8B8_UNORM:
210        case PIPE_FORMAT_R8G8B8A8_UNORM:
211        case PIPE_FORMAT_R8G8B8X8_UNORM:
212        case PIPE_FORMAT_I8_UNORM:
213            retval = usage &
214                (PIPE_TEXTURE_USAGE_RENDER_TARGET |
215                 PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
216                 PIPE_TEXTURE_USAGE_PRIMARY |
217                 PIPE_TEXTURE_USAGE_SAMPLER);
218            break;
219
220        /* Z buffer or texture */
221        case PIPE_FORMAT_Z16_UNORM:
222        case PIPE_FORMAT_Z24X8_UNORM:
223        /* Z buffer with stencil or texture */
224        case PIPE_FORMAT_Z24S8_UNORM:
225            retval = usage &
226                (PIPE_TEXTURE_USAGE_DEPTH_STENCIL |
227                 PIPE_TEXTURE_USAGE_SAMPLER);
228            break;
229
230        /* Definitely unsupported formats. */
231        /* Non-usable Z buffer/stencil formats. */
232        case PIPE_FORMAT_Z32_UNORM:
233        case PIPE_FORMAT_S8Z24_UNORM:
234        case PIPE_FORMAT_X8Z24_UNORM:
235            debug_printf("r300: Note: Got unsupported format: %s in %s\n",
236                pf_name(format), __FUNCTION__);
237            return FALSE;
238
239        /* XXX These don't even exist
240        case PIPE_FORMAT_A32R32G32B32:
241        case PIPE_FORMAT_A16R16G16B16: */
242        /* XXX What the deuce is UV88? (r3xx accel page 14)
243            debug_printf("r300: Warning: Got unimplemented format: %s in %s\n",
244                pf_name(format), __FUNCTION__);
245            return FALSE; */
246
247        /* XXX Supported yet unimplemented r5xx formats: */
248        /* XXX Again, what is UV1010 this time? (r5xx accel page 148) */
249        /* XXX Even more that don't exist
250        case PIPE_FORMAT_A10R10G10B10_UNORM:
251        case PIPE_FORMAT_A2R10G10B10_UNORM:
252        case PIPE_FORMAT_I10_UNORM:
253            debug_printf(
254                "r300: Warning: Got unimplemented r500 format: %s in %s\n",
255                pf_name(format), __FUNCTION__);
256            return FALSE; */
257
258        default:
259            /* Unknown format... */
260            debug_printf("r300: Warning: Got unknown format: %s in %s\n",
261                pf_name(format), __FUNCTION__);
262            break;
263    }
264
265    /* If usage was a mask that contained multiple bits, and not all of them
266     * are supported, this will catch that and return FALSE.
267     * e.g. usage = 2 | 4; retval = 4; (retval >= usage) == FALSE
268     *
269     * This also returns FALSE for any unknown formats.
270     */
271    return (retval >= usage);
272}
273
274static boolean r300_is_format_supported(struct pipe_screen* pscreen,
275                                        enum pipe_format format,
276                                        enum pipe_texture_target target,
277                                        unsigned tex_usage,
278                                        unsigned geom_flags)
279{
280    switch (target) {
281        case PIPE_TEXTURE_1D:   /* handle 1D textures as 2D ones */
282        case PIPE_TEXTURE_2D:
283        case PIPE_TEXTURE_3D:
284        case PIPE_TEXTURE_CUBE:
285            return check_tex_format(format, tex_usage,
286                r300_screen(pscreen)->caps->is_r500);
287
288        default:
289            debug_printf("r300: Fatal: This is not a format target: %d\n",
290                target);
291            assert(0);
292            break;
293    }
294
295    return FALSE;
296}
297
298static struct pipe_transfer*
299r300_get_tex_transfer(struct pipe_screen *screen,
300                      struct pipe_texture *texture,
301                      unsigned face, unsigned level, unsigned zslice,
302                      enum pipe_transfer_usage usage, unsigned x, unsigned y,
303                      unsigned w, unsigned h)
304{
305    struct r300_texture *tex = (struct r300_texture *)texture;
306    struct r300_transfer *trans;
307    unsigned offset;
308
309    offset = r300_texture_get_offset(tex, level, zslice, face);  /* in bytes */
310
311    trans = CALLOC_STRUCT(r300_transfer);
312    if (trans) {
313        pipe_texture_reference(&trans->transfer.texture, texture);
314        trans->transfer.format = texture->format;
315        trans->transfer.x = x;
316        trans->transfer.y = y;
317        trans->transfer.width = w;
318        trans->transfer.height = h;
319        trans->transfer.block = texture->block;
320        trans->transfer.nblocksx = texture->nblocksx[level];
321        trans->transfer.nblocksy = texture->nblocksy[level];
322        trans->transfer.stride = r300_texture_get_stride(tex, level);
323        trans->transfer.usage = usage;
324
325        /* XXX not sure whether it's required to set these two,
326               the driver doesn't use them */
327        trans->transfer.zslice = zslice;
328        trans->transfer.face = face;
329
330        trans->offset = offset;
331    }
332    return &trans->transfer;
333}
334
335static void
336r300_tex_transfer_destroy(struct pipe_transfer *trans)
337{
338   pipe_texture_reference(&trans->texture, NULL);
339   FREE(trans);
340}
341
342static void* r300_transfer_map(struct pipe_screen* screen,
343                              struct pipe_transfer* transfer)
344{
345    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
346    char* map;
347
348    map = pipe_buffer_map(screen, tex->buffer,
349                          pipe_transfer_buffer_flags(transfer));
350
351    if (!map) {
352        return NULL;
353    }
354
355    return map + r300_transfer(transfer)->offset +
356        transfer->y / transfer->block.height * transfer->stride +
357        transfer->x / transfer->block.width * transfer->block.size;
358}
359
360static void r300_transfer_unmap(struct pipe_screen* screen,
361                                struct pipe_transfer* transfer)
362{
363    struct r300_texture* tex = (struct r300_texture*)transfer->texture;
364    pipe_buffer_unmap(screen, tex->buffer);
365}
366
367static void r300_destroy_screen(struct pipe_screen* pscreen)
368{
369    struct r300_screen* r300screen = r300_screen(pscreen);
370
371    FREE(r300screen->caps);
372    FREE(r300screen);
373}
374
375struct pipe_screen* r300_create_screen(struct r300_winsys* r300_winsys)
376{
377    struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
378    struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
379
380    if (!r300screen || !caps)
381        return NULL;
382
383    caps->pci_id = r300_winsys->pci_id;
384    caps->num_frag_pipes = r300_winsys->gb_pipes;
385    caps->num_z_pipes = r300_winsys->z_pipes;
386
387    r300_parse_chipset(caps);
388
389    r300screen->caps = caps;
390    r300screen->screen.winsys = (struct pipe_winsys*)r300_winsys;
391    r300screen->screen.destroy = r300_destroy_screen;
392    r300screen->screen.get_name = r300_get_name;
393    r300screen->screen.get_vendor = r300_get_vendor;
394    r300screen->screen.get_param = r300_get_param;
395    r300screen->screen.get_paramf = r300_get_paramf;
396    r300screen->screen.is_format_supported = r300_is_format_supported;
397    r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
398    r300screen->screen.tex_transfer_destroy = r300_tex_transfer_destroy;
399    r300screen->screen.transfer_map = r300_transfer_map;
400    r300screen->screen.transfer_unmap = r300_transfer_unmap;
401
402    r300_init_screen_texture_functions(&r300screen->screen);
403    u_simple_screen_init(&r300screen->screen);
404
405    return &r300screen->screen;
406}
407