1/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3/*
4 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Authors:
26 *    Rob Clark <robclark@freedesktop.org>
27 */
28
29#include "pipe/p_state.h"
30#include "util/u_string.h"
31#include "util/u_memory.h"
32#include "util/u_inlines.h"
33
34#include "freedreno_texture.h"
35#include "freedreno_context.h"
36#include "freedreno_util.h"
37
38static void
39fd_sampler_state_delete(struct pipe_context *pctx, void *hwcso)
40{
41	FREE(hwcso);
42}
43
44static void
45fd_sampler_view_destroy(struct pipe_context *pctx,
46		struct pipe_sampler_view *view)
47{
48	pipe_resource_reference(&view->texture, NULL);
49	FREE(view);
50}
51
52static void bind_sampler_states(struct fd_texture_stateobj *tex,
53		unsigned start, unsigned nr, void **hwcso)
54{
55	unsigned i;
56
57	for (i = 0; i < nr; i++) {
58		unsigned p = i + start;
59		tex->samplers[p] = hwcso[i];
60		if (tex->samplers[p])
61			tex->valid_samplers |= (1 << p);
62		else
63			tex->valid_samplers &= ~(1 << p);
64	}
65
66	tex->num_samplers = util_last_bit(tex->valid_samplers);
67}
68
69static void set_sampler_views(struct fd_texture_stateobj *tex,
70		unsigned start, unsigned nr, struct pipe_sampler_view **views)
71{
72	unsigned i;
73
74	for (i = 0; i < nr; i++) {
75		struct pipe_sampler_view *view = views ? views[i] : NULL;
76		unsigned p = i + start;
77		pipe_sampler_view_reference(&tex->textures[p], view);
78		if (tex->textures[p])
79			tex->valid_textures |= (1 << p);
80		else
81			tex->valid_textures &= ~(1 << p);
82	}
83
84	tex->num_textures = util_last_bit(tex->valid_textures);
85}
86
87void
88fd_sampler_states_bind(struct pipe_context *pctx,
89		enum pipe_shader_type shader, unsigned start,
90		unsigned nr, void **hwcso)
91{
92	struct fd_context *ctx = fd_context(pctx);
93
94	if (shader == PIPE_SHADER_FRAGMENT) {
95		bind_sampler_states(&ctx->fragtex, start, nr, hwcso);
96		ctx->dirty |= FD_DIRTY_FRAGTEX;
97	}
98	else if (shader == PIPE_SHADER_VERTEX) {
99		bind_sampler_states(&ctx->verttex, start, nr, hwcso);
100		ctx->dirty |= FD_DIRTY_VERTTEX;
101	}
102}
103
104void
105fd_set_sampler_views(struct pipe_context *pctx, enum pipe_shader_type shader,
106		unsigned start, unsigned nr,
107		struct pipe_sampler_view **views)
108{
109	struct fd_context *ctx = fd_context(pctx);
110
111	switch (shader) {
112	case PIPE_SHADER_FRAGMENT:
113		/* on a2xx, since there is a flat address space for textures/samplers,
114		 * a change in # of fragment textures/samplers will trigger patching
115		 * and re-emitting the vertex shader:
116		 *
117		 * (note: later gen's ignore FD_DIRTY_TEXSTATE so fine to set it)
118		 */
119		if (nr != ctx->fragtex.num_textures)
120			ctx->dirty |= FD_DIRTY_TEXSTATE;
121
122		set_sampler_views(&ctx->fragtex, start, nr, views);
123		ctx->dirty |= FD_DIRTY_FRAGTEX;
124		break;
125	case PIPE_SHADER_VERTEX:
126		set_sampler_views(&ctx->verttex, start, nr, views);
127		ctx->dirty |= FD_DIRTY_VERTTEX;
128		break;
129	default:
130		break;
131	}
132}
133
134void
135fd_texture_init(struct pipe_context *pctx)
136{
137	pctx->delete_sampler_state = fd_sampler_state_delete;
138
139	pctx->sampler_view_destroy = fd_sampler_view_destroy;
140}
141
142/* helper for setting up border-color buffer for a3xx/a4xx: */
143void
144fd_setup_border_colors(struct fd_texture_stateobj *tex, void *ptr,
145		unsigned offset)
146{
147	unsigned i, j;
148
149	for (i = 0; i < tex->num_samplers; i++) {
150		struct pipe_sampler_state *sampler = tex->samplers[i];
151		uint16_t *bcolor = (uint16_t *)((uint8_t *)ptr +
152				(BORDERCOLOR_SIZE * offset) +
153				(BORDERCOLOR_SIZE * i));
154		uint32_t *bcolor32 = (uint32_t *)&bcolor[16];
155
156		if (!sampler)
157			continue;
158
159		/*
160		 * XXX HACK ALERT XXX
161		 *
162		 * The border colors need to be swizzled in a particular
163		 * format-dependent order. Even though samplers don't know about
164		 * formats, we can assume that with a GL state tracker, there's a
165		 * 1:1 correspondence between sampler and texture. Take advantage
166		 * of that knowledge.
167		 */
168		if (i < tex->num_textures && tex->textures[i]) {
169			const struct util_format_description *desc =
170					util_format_description(tex->textures[i]->format);
171			for (j = 0; j < 4; j++) {
172				if (desc->swizzle[j] >= 4)
173					continue;
174
175				const struct util_format_channel_description *chan =
176					&desc->channel[desc->swizzle[j]];
177				if (chan->pure_integer) {
178					bcolor32[desc->swizzle[j] + 4] = sampler->border_color.i[j];
179					bcolor[desc->swizzle[j] + 8] = sampler->border_color.i[j];
180				} else {
181					bcolor32[desc->swizzle[j]] = fui(sampler->border_color.f[j]);
182					bcolor[desc->swizzle[j]] =
183						util_float_to_half(sampler->border_color.f[j]);
184				}
185			}
186		}
187	}
188}
189