Home | History | Annotate | Download | only in a3xx 
      1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
      2 
      3 /*
      4  * Copyright (C) 2013 Rob Clark <robclark (at) 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 (at) freedesktop.org>
     27  */
     28 
     29 #include "pipe/p_state.h"
     30 #include "util/u_blend.h"
     31 #include "util/u_dual_blend.h"
     32 #include "util/u_string.h"
     33 #include "util/u_memory.h"
     34 
     35 #include "fd3_blend.h"
     36 #include "fd3_context.h"
     37 #include "fd3_format.h"
     38 
     39 
     40 static enum a3xx_rb_blend_opcode
     41 blend_func(unsigned func)
     42 {
     43 	switch (func) {
     44 	case PIPE_BLEND_ADD:
     45 		return BLEND_DST_PLUS_SRC;
     46 	case PIPE_BLEND_MIN:
     47 		return BLEND_MIN_DST_SRC;
     48 	case PIPE_BLEND_MAX:
     49 		return BLEND_MAX_DST_SRC;
     50 	case PIPE_BLEND_SUBTRACT:
     51 		return BLEND_SRC_MINUS_DST;
     52 	case PIPE_BLEND_REVERSE_SUBTRACT:
     53 		return BLEND_DST_MINUS_SRC;
     54 	default:
     55 		DBG("invalid blend func: %x", func);
     56 		return 0;
     57 	}
     58 }
     59 
     60 void *
     61 fd3_blend_state_create(struct pipe_context *pctx,
     62 		const struct pipe_blend_state *cso)
     63 {
     64 	struct fd3_blend_stateobj *so;
     65 	enum a3xx_rop_code rop = ROP_COPY;
     66 	bool reads_dest = false;
     67 	int i;
     68 
     69 	if (cso->logicop_enable) {
     70 		rop = cso->logicop_func;  /* maps 1:1 */
     71 
     72 		switch (cso->logicop_func) {
     73 		case PIPE_LOGICOP_NOR:
     74 		case PIPE_LOGICOP_AND_INVERTED:
     75 		case PIPE_LOGICOP_AND_REVERSE:
     76 		case PIPE_LOGICOP_INVERT:
     77 		case PIPE_LOGICOP_XOR:
     78 		case PIPE_LOGICOP_NAND:
     79 		case PIPE_LOGICOP_AND:
     80 		case PIPE_LOGICOP_EQUIV:
     81 		case PIPE_LOGICOP_NOOP:
     82 		case PIPE_LOGICOP_OR_INVERTED:
     83 		case PIPE_LOGICOP_OR_REVERSE:
     84 		case PIPE_LOGICOP_OR:
     85 			reads_dest = true;
     86 			break;
     87 		}
     88 	}
     89 
     90 	so = CALLOC_STRUCT(fd3_blend_stateobj);
     91 	if (!so)
     92 		return NULL;
     93 
     94 	so->base = *cso;
     95 
     96 	for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
     97 		const struct pipe_rt_blend_state *rt;
     98 		if (cso->independent_blend_enable)
     99 			rt = &cso->rt[i];
    100 		else
    101 			rt = &cso->rt[0];
    102 
    103 		so->rb_mrt[i].blend_control_rgb =
    104 				A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
    105 				A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
    106 				A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
    107 
    108 		so->rb_mrt[i].blend_control_alpha =
    109 				A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
    110 				A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
    111 				A3XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
    112 
    113 		so->rb_mrt[i].blend_control_no_alpha_rgb =
    114 				A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
    115 				A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
    116 				A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
    117 
    118 		so->rb_mrt[i].control =
    119 				A3XX_RB_MRT_CONTROL_ROP_CODE(rop) |
    120 				A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
    121 
    122 		if (rt->blend_enable)
    123 			so->rb_mrt[i].control |=
    124 					A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
    125 					A3XX_RB_MRT_CONTROL_BLEND |
    126 					A3XX_RB_MRT_CONTROL_BLEND2;
    127 
    128 		if (reads_dest)
    129 			so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
    130 
    131 		if (cso->dither)
    132 			so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
    133 	}
    134 
    135 	if (cso->rt[0].blend_enable && util_blend_state_is_dual(cso, 0))
    136 		so->rb_render_control = A3XX_RB_RENDER_CONTROL_DUAL_COLOR_IN_ENABLE;
    137 
    138 	return so;
    139 }
    140