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      1 /*
      2  * Copyright (C) 2016 Rob Clark <robclark (at) freedesktop.org>
      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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     21  * SOFTWARE.
     22  *
     23  * Authors:
     24  *    Rob Clark <robclark (at) freedesktop.org>
     25  */
     26 
     27 #include "pipe/p_state.h"
     28 #include "util/u_blend.h"
     29 #include "util/u_string.h"
     30 #include "util/u_memory.h"
     31 
     32 #include "fd5_blend.h"
     33 #include "fd5_context.h"
     34 #include "fd5_format.h"
     35 
     36 // XXX move somewhere common.. same across a3xx/a4xx/a5xx..
     37 static enum a3xx_rb_blend_opcode
     38 blend_func(unsigned func)
     39 {
     40 	switch (func) {
     41 	case PIPE_BLEND_ADD:
     42 		return BLEND_DST_PLUS_SRC;
     43 	case PIPE_BLEND_MIN:
     44 		return BLEND_MIN_DST_SRC;
     45 	case PIPE_BLEND_MAX:
     46 		return BLEND_MAX_DST_SRC;
     47 	case PIPE_BLEND_SUBTRACT:
     48 		return BLEND_SRC_MINUS_DST;
     49 	case PIPE_BLEND_REVERSE_SUBTRACT:
     50 		return BLEND_DST_MINUS_SRC;
     51 	default:
     52 		DBG("invalid blend func: %x", func);
     53 		return 0;
     54 	}
     55 }
     56 
     57 void *
     58 fd5_blend_state_create(struct pipe_context *pctx,
     59 		const struct pipe_blend_state *cso)
     60 {
     61 	struct fd5_blend_stateobj *so;
     62 //	enum a3xx_rop_code rop = ROP_COPY;
     63 	bool reads_dest = false;
     64 	unsigned i, mrt_blend = 0;
     65 
     66 	if (cso->logicop_enable) {
     67 //		rop = cso->logicop_func;  /* maps 1:1 */
     68 
     69 		switch (cso->logicop_func) {
     70 		case PIPE_LOGICOP_NOR:
     71 		case PIPE_LOGICOP_AND_INVERTED:
     72 		case PIPE_LOGICOP_AND_REVERSE:
     73 		case PIPE_LOGICOP_INVERT:
     74 		case PIPE_LOGICOP_XOR:
     75 		case PIPE_LOGICOP_NAND:
     76 		case PIPE_LOGICOP_AND:
     77 		case PIPE_LOGICOP_EQUIV:
     78 		case PIPE_LOGICOP_NOOP:
     79 		case PIPE_LOGICOP_OR_INVERTED:
     80 		case PIPE_LOGICOP_OR_REVERSE:
     81 		case PIPE_LOGICOP_OR:
     82 			reads_dest = true;
     83 			break;
     84 		}
     85 	}
     86 
     87 	so = CALLOC_STRUCT(fd5_blend_stateobj);
     88 	if (!so)
     89 		return NULL;
     90 
     91 	so->base = *cso;
     92 
     93 	for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
     94 		const struct pipe_rt_blend_state *rt;
     95 
     96 		if (cso->independent_blend_enable)
     97 			rt = &cso->rt[i];
     98 		else
     99 			rt = &cso->rt[0];
    100 
    101 		so->rb_mrt[i].blend_control_rgb =
    102 				A5XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
    103 				A5XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
    104 				A5XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
    105 
    106 		so->rb_mrt[i].blend_control_alpha =
    107 				A5XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
    108 				A5XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
    109 				A5XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
    110 
    111 		so->rb_mrt[i].blend_control_no_alpha_rgb =
    112 				A5XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
    113 				A5XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
    114 				A5XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
    115 
    116 
    117 		so->rb_mrt[i].control =
    118 //				A5XX_RB_MRT_CONTROL_ROP_CODE(rop) |
    119 //				COND(cso->logicop_enable, A5XX_RB_MRT_CONTROL_ROP_ENABLE) |
    120 				0x60 | /* XXX set other than RECTLIST clear blits?? */
    121 				A5XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
    122 
    123 		if (rt->blend_enable) {
    124 			so->rb_mrt[i].control |=
    125 //					A5XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
    126 					A5XX_RB_MRT_CONTROL_BLEND |
    127 					A5XX_RB_MRT_CONTROL_BLEND2;
    128 			mrt_blend |= (1 << i);
    129 		}
    130 
    131 		if (reads_dest) {
    132 //			so->rb_mrt[i].control |= A5XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
    133 			mrt_blend |= (1 << i);
    134 		}
    135 
    136 //		if (cso->dither)
    137 //			so->rb_mrt[i].buf_info |= A5XX_RB_MRT_BUF_INFO_DITHER_MODE(DITHER_ALWAYS);
    138 	}
    139 
    140 	so->rb_blend_cntl = A5XX_RB_BLEND_CNTL_ENABLE_BLEND(mrt_blend) |
    141 		COND(cso->independent_blend_enable, A5XX_RB_BLEND_CNTL_INDEPENDENT_BLEND);
    142 
    143 	return so;
    144 }
    145