r300_transfer.c revision 7e02303497237cde958c28608477d0c355a8038b 
1/*
2 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
3 * Copyright 2010 Marek Olšák <maraeo@gmail.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
23
24#include "r300_transfer.h"
25#include "r300_texture_desc.h"
26#include "r300_screen_buffer.h"
27
28#include "util/u_memory.h"
29#include "util/u_format.h"
30#include "util/u_box.h"
31
32struct r300_transfer {
33    /* Parent class */
34    struct pipe_transfer transfer;
35
36    /* Offset from start of buffer. */
37    unsigned offset;
38
39    /* Linear texture. */
40    struct r300_resource *linear_texture;
41};
42
43/* Convenience cast wrapper. */
44static INLINE struct r300_transfer*
45r300_transfer(struct pipe_transfer* transfer)
46{
47    return (struct r300_transfer*)transfer;
48}
49
50/* Copy from a tiled texture to a detiled one. */
51static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
52                                         struct r300_transfer *r300transfer)
53{
54    struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
55    struct pipe_resource *tex = transfer->resource;
56
57    ctx->resource_copy_region(ctx, &r300transfer->linear_texture->b.b.b, 0,
58                              0, 0, 0,
59                              tex, transfer->level, &transfer->box);
60}
61
62/* Copy a detiled texture to a tiled one. */
63static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
64                                         struct r300_transfer *r300transfer)
65{
66    struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
67    struct pipe_resource *tex = transfer->resource;
68    struct pipe_box src_box;
69    u_box_origin_2d(transfer->box.width, transfer->box.height, &src_box);
70
71    ctx->resource_copy_region(ctx, tex, transfer->level,
72                              transfer->box.x, transfer->box.y, transfer->box.z,
73                              &r300transfer->linear_texture->b.b.b, 0, &src_box);
74
75    /* XXX remove this. */
76    r300_flush(ctx, 0, NULL);
77}
78
79struct pipe_transfer*
80r300_texture_get_transfer(struct pipe_context *ctx,
81                          struct pipe_resource *texture,
82                          unsigned level,
83                          unsigned usage,
84                          const struct pipe_box *box)
85{
86    struct r300_context *r300 = r300_context(ctx);
87    struct r300_resource *tex = r300_resource(texture);
88    struct r300_transfer *trans;
89    struct pipe_resource base;
90    boolean referenced_cs, referenced_hw, blittable;
91    const struct util_format_description *desc =
92        util_format_description(texture->format);
93
94    referenced_cs =
95        r300->rws->cs_is_buffer_referenced(r300->cs, tex->cs_buf);
96    if (referenced_cs) {
97        referenced_hw = TRUE;
98    } else {
99        referenced_hw =
100            r300->rws->buffer_is_busy(tex->buf);
101    }
102
103    blittable = desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ||
104                desc->layout == UTIL_FORMAT_LAYOUT_S3TC ||
105                desc->layout == UTIL_FORMAT_LAYOUT_RGTC;
106
107    trans = CALLOC_STRUCT(r300_transfer);
108    if (trans) {
109        /* Initialize the transfer object. */
110        pipe_resource_reference(&trans->transfer.resource, texture);
111        trans->transfer.level = level;
112        trans->transfer.usage = usage;
113        trans->transfer.box = *box;
114
115        /* If the texture is tiled, we must create a temporary detiled texture
116         * for this transfer.
117         * Also make write transfers pipelined. */
118        if (tex->tex.microtile || tex->tex.macrotile[level] ||
119            (referenced_hw && blittable && !(usage & PIPE_TRANSFER_READ))) {
120            if (r300->blitter->running) {
121                fprintf(stderr, "r300: ERROR: Blitter recursion in texture_get_transfer.\n");
122                os_break();
123            }
124
125            base.target = PIPE_TEXTURE_2D;
126            base.format = texture->format;
127            base.width0 = box->width;
128            base.height0 = box->height;
129            base.depth0 = 1;
130            base.array_size = 1;
131            base.last_level = 0;
132            base.nr_samples = 0;
133            base.usage = PIPE_USAGE_DYNAMIC;
134            base.bind = 0;
135            base.flags = R300_RESOURCE_FLAG_TRANSFER;
136
137            /* For texture reading, the temporary (detiled) texture is used as
138             * a render target when blitting from a tiled texture. */
139            if (usage & PIPE_TRANSFER_READ) {
140                base.bind |= PIPE_BIND_RENDER_TARGET;
141            }
142            /* For texture writing, the temporary texture is used as a sampler
143             * when blitting into a tiled texture. */
144            if (usage & PIPE_TRANSFER_WRITE) {
145                base.bind |= PIPE_BIND_SAMPLER_VIEW;
146            }
147
148            /* Create the temporary texture. */
149            trans->linear_texture = r300_resource(
150               ctx->screen->resource_create(ctx->screen,
151                                            &base));
152
153            if (!trans->linear_texture) {
154                /* Oh crap, the thing can't create the texture.
155                 * Let's flush and try again. */
156                r300_flush(ctx, 0, NULL);
157
158                trans->linear_texture = r300_resource(
159                   ctx->screen->resource_create(ctx->screen,
160                                                &base));
161
162                if (!trans->linear_texture) {
163                    /* For linear textures, it's safe to fallback to
164                     * an unpipelined transfer. */
165                    if (!tex->tex.microtile && !tex->tex.macrotile[level]) {
166                        goto unpipelined;
167                    }
168
169                    /* Otherwise, go to hell. */
170                    fprintf(stderr,
171                        "r300: Failed to create a transfer object, praise.\n");
172                    FREE(trans);
173                    return NULL;
174                }
175            }
176
177            assert(!trans->linear_texture->tex.microtile &&
178                   !trans->linear_texture->tex.macrotile[0]);
179
180            /* Set the stride. */
181            trans->transfer.stride =
182                    trans->linear_texture->tex.stride_in_bytes[0];
183
184            if (usage & PIPE_TRANSFER_READ) {
185                /* We cannot map a tiled texture directly because the data is
186                 * in a different order, therefore we do detiling using a blit. */
187                r300_copy_from_tiled_texture(ctx, trans);
188
189                /* Always referenced in the blit. */
190                r300_flush(ctx, 0, NULL);
191            }
192            return &trans->transfer;
193        }
194
195    unpipelined:
196        /* Unpipelined transfer. */
197        trans->transfer.stride = tex->tex.stride_in_bytes[level];
198        trans->offset = r300_texture_get_offset(tex, level, box->z);
199
200        if (referenced_cs &&
201            !(usage & PIPE_TRANSFER_UNSYNCHRONIZED))
202            r300_flush(ctx, 0, NULL);
203        return &trans->transfer;
204    }
205    return NULL;
206}
207
208void r300_texture_transfer_destroy(struct pipe_context *ctx,
209				   struct pipe_transfer *trans)
210{
211    struct r300_transfer *r300transfer = r300_transfer(trans);
212
213    if (r300transfer->linear_texture) {
214        if (trans->usage & PIPE_TRANSFER_WRITE) {
215            r300_copy_into_tiled_texture(ctx, r300transfer);
216        }
217
218        pipe_resource_reference(
219            (struct pipe_resource**)&r300transfer->linear_texture, NULL);
220    }
221    pipe_resource_reference(&trans->resource, NULL);
222    FREE(trans);
223}
224
225void* r300_texture_transfer_map(struct pipe_context *ctx,
226				struct pipe_transfer *transfer)
227{
228    struct r300_context *r300 = r300_context(ctx);
229    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
230    struct r300_transfer *r300transfer = r300_transfer(transfer);
231    struct r300_resource *tex = r300_resource(transfer->resource);
232    char *map;
233    enum pipe_format format = tex->b.b.b.format;
234
235    if (r300transfer->linear_texture) {
236        /* The detiled texture is of the same size as the region being mapped
237         * (no offset needed). */
238        return rws->buffer_map(r300transfer->linear_texture->buf,
239                               r300->cs,
240                               transfer->usage);
241    } else {
242        /* Tiling is disabled. */
243        map = rws->buffer_map(tex->buf, r300->cs,
244                              transfer->usage);
245
246        if (!map) {
247            return NULL;
248        }
249
250        return map + r300_transfer(transfer)->offset +
251            transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
252            transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
253    }
254}
255
256void r300_texture_transfer_unmap(struct pipe_context *ctx,
257				 struct pipe_transfer *transfer)
258{
259    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
260    struct r300_transfer *r300transfer = r300_transfer(transfer);
261    struct r300_resource *tex = r300_resource(transfer->resource);
262
263    if (r300transfer->linear_texture) {
264        rws->buffer_unmap(r300transfer->linear_texture->buf);
265    } else {
266        rws->buffer_unmap(tex->buf);
267    }
268}
269