/*
 * Copyright (c) 2012-2013 Etnaviv Project
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
/* inlined translation functions between gallium and vivante */
#ifndef H_TRANSLATE
#define H_TRANSLATE

#include "pipe/p_defines.h"
#include "pipe/p_format.h"
#include "pipe/p_state.h"

#include "etnaviv_debug.h"
#include "etnaviv_format.h"
#include "etnaviv_util.h"
#include "hw/cmdstream.xml.h"
#include "hw/common_3d.xml.h"
#include "hw/state.xml.h"
#include "hw/state_3d.xml.h"

#include "util/u_format.h"
#include "util/u_math.h"

/* Returned when there is no match of pipe value to etna value */
#define ETNA_NO_MATCH (~0)

static inline uint32_t
translate_cull_face(unsigned cull_face, unsigned front_ccw)
{
   switch (cull_face) {
   case PIPE_FACE_NONE:
      return VIVS_PA_CONFIG_CULL_FACE_MODE_OFF;
   case PIPE_FACE_BACK:
      return front_ccw ? VIVS_PA_CONFIG_CULL_FACE_MODE_CW
                       : VIVS_PA_CONFIG_CULL_FACE_MODE_CCW;
   case PIPE_FACE_FRONT:
      return front_ccw ? VIVS_PA_CONFIG_CULL_FACE_MODE_CCW
                       : VIVS_PA_CONFIG_CULL_FACE_MODE_CW;
   default:
      DBG("Unhandled cull face mode %i", cull_face);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_polygon_mode(unsigned polygon_mode)
{
   switch (polygon_mode) {
   case PIPE_POLYGON_MODE_FILL:
      return VIVS_PA_CONFIG_FILL_MODE_SOLID;
   case PIPE_POLYGON_MODE_LINE:
      return VIVS_PA_CONFIG_FILL_MODE_WIREFRAME;
   case PIPE_POLYGON_MODE_POINT:
      return VIVS_PA_CONFIG_FILL_MODE_POINT;
   default:
      DBG("Unhandled polygon mode %i", polygon_mode);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_stencil_mode(bool enable_0, bool enable_1)
{
   if (enable_0) {
      return enable_1 ? VIVS_PE_STENCIL_CONFIG_MODE_TWO_SIDED
                      : VIVS_PE_STENCIL_CONFIG_MODE_ONE_SIDED;
   } else {
      return VIVS_PE_STENCIL_CONFIG_MODE_DISABLED;
   }
}

static inline uint32_t
translate_stencil_op(unsigned stencil_op)
{
   switch (stencil_op) {
   case PIPE_STENCIL_OP_KEEP:
      return STENCIL_OP_KEEP;
   case PIPE_STENCIL_OP_ZERO:
      return STENCIL_OP_ZERO;
   case PIPE_STENCIL_OP_REPLACE:
      return STENCIL_OP_REPLACE;
   case PIPE_STENCIL_OP_INCR:
      return STENCIL_OP_INCR;
   case PIPE_STENCIL_OP_DECR:
      return STENCIL_OP_DECR;
   case PIPE_STENCIL_OP_INCR_WRAP:
      return STENCIL_OP_INCR_WRAP;
   case PIPE_STENCIL_OP_DECR_WRAP:
      return STENCIL_OP_DECR_WRAP;
   case PIPE_STENCIL_OP_INVERT:
      return STENCIL_OP_INVERT;
   default:
      DBG("Unhandled stencil op: %i", stencil_op);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_blend(unsigned blend)
{
   switch (blend) {
   case PIPE_BLEND_ADD:
      return BLEND_EQ_ADD;
   case PIPE_BLEND_SUBTRACT:
      return BLEND_EQ_SUBTRACT;
   case PIPE_BLEND_REVERSE_SUBTRACT:
      return BLEND_EQ_REVERSE_SUBTRACT;
   case PIPE_BLEND_MIN:
      return BLEND_EQ_MIN;
   case PIPE_BLEND_MAX:
      return BLEND_EQ_MAX;
   default:
      DBG("Unhandled blend: %i", blend);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_blend_factor(unsigned blend_factor)
{
   switch (blend_factor) {
   case PIPE_BLENDFACTOR_ONE:
      return BLEND_FUNC_ONE;
   case PIPE_BLENDFACTOR_SRC_COLOR:
      return BLEND_FUNC_SRC_COLOR;
   case PIPE_BLENDFACTOR_SRC_ALPHA:
      return BLEND_FUNC_SRC_ALPHA;
   case PIPE_BLENDFACTOR_DST_ALPHA:
      return BLEND_FUNC_DST_ALPHA;
   case PIPE_BLENDFACTOR_DST_COLOR:
      return BLEND_FUNC_DST_COLOR;
   case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
      return BLEND_FUNC_SRC_ALPHA_SATURATE;
   case PIPE_BLENDFACTOR_CONST_COLOR:
      return BLEND_FUNC_CONSTANT_COLOR;
   case PIPE_BLENDFACTOR_CONST_ALPHA:
      return BLEND_FUNC_CONSTANT_ALPHA;
   case PIPE_BLENDFACTOR_ZERO:
      return BLEND_FUNC_ZERO;
   case PIPE_BLENDFACTOR_INV_SRC_COLOR:
      return BLEND_FUNC_ONE_MINUS_SRC_COLOR;
   case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
      return BLEND_FUNC_ONE_MINUS_SRC_ALPHA;
   case PIPE_BLENDFACTOR_INV_DST_ALPHA:
      return BLEND_FUNC_ONE_MINUS_DST_ALPHA;
   case PIPE_BLENDFACTOR_INV_DST_COLOR:
      return BLEND_FUNC_ONE_MINUS_DST_COLOR;
   case PIPE_BLENDFACTOR_INV_CONST_COLOR:
      return BLEND_FUNC_ONE_MINUS_CONSTANT_COLOR;
   case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
      return BLEND_FUNC_ONE_MINUS_CONSTANT_ALPHA;
   case PIPE_BLENDFACTOR_SRC1_COLOR:
   case PIPE_BLENDFACTOR_SRC1_ALPHA:
   case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
   case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:
   default:
      DBG("Unhandled blend factor: %i", blend_factor);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_texture_wrapmode(unsigned wrap)
{
   switch (wrap) {
   case PIPE_TEX_WRAP_REPEAT:
      return TEXTURE_WRAPMODE_REPEAT;
   case PIPE_TEX_WRAP_CLAMP:
      return TEXTURE_WRAPMODE_CLAMP_TO_EDGE;
   case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
      return TEXTURE_WRAPMODE_CLAMP_TO_EDGE;
   case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
      return TEXTURE_WRAPMODE_CLAMP_TO_EDGE; /* XXX */
   case PIPE_TEX_WRAP_MIRROR_REPEAT:
      return TEXTURE_WRAPMODE_MIRRORED_REPEAT;
   case PIPE_TEX_WRAP_MIRROR_CLAMP:
      return TEXTURE_WRAPMODE_MIRRORED_REPEAT; /* XXX */
   case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
      return TEXTURE_WRAPMODE_MIRRORED_REPEAT; /* XXX */
   case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
      return TEXTURE_WRAPMODE_MIRRORED_REPEAT; /* XXX */
   default:
      DBG("Unhandled texture wrapmode: %i", wrap);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_texture_mipfilter(unsigned filter)
{
   switch (filter) {
   case PIPE_TEX_MIPFILTER_NEAREST:
      return TEXTURE_FILTER_NEAREST;
   case PIPE_TEX_MIPFILTER_LINEAR:
      return TEXTURE_FILTER_LINEAR;
   case PIPE_TEX_MIPFILTER_NONE:
      return TEXTURE_FILTER_NONE;
   default:
      DBG("Unhandled texture mipfilter: %i", filter);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_texture_filter(unsigned filter)
{
   switch (filter) {
   case PIPE_TEX_FILTER_NEAREST:
      return TEXTURE_FILTER_NEAREST;
   case PIPE_TEX_FILTER_LINEAR:
      return TEXTURE_FILTER_LINEAR;
   /* What about anisotropic? */
   default:
      DBG("Unhandled texture filter: %i", filter);
      return ETNA_NO_MATCH;
   }
}

/* return a RS "compatible" format for use when copying */
static inline enum pipe_format
etna_compatible_rs_format(enum pipe_format fmt)
{
   /* YUYV and UYVY are blocksize 4, but 2 bytes per pixel */
   if (fmt == PIPE_FORMAT_YUYV || fmt == PIPE_FORMAT_UYVY)
      return PIPE_FORMAT_B4G4R4A4_UNORM;

   switch (util_format_get_blocksize(fmt)) {
   case 2:
      return PIPE_FORMAT_B4G4R4A4_UNORM;
   case 4:
      return PIPE_FORMAT_B8G8R8A8_UNORM;
   default:
      return fmt;
   }
}

static inline int
translate_rb_src_dst_swap(enum pipe_format src, enum pipe_format dst)
{
   return translate_rs_format_rb_swap(src) ^ translate_rs_format_rb_swap(dst);
}

static inline uint32_t
translate_depth_format(enum pipe_format fmt)
{
   /* Note: Pipe format convention is LSB to MSB, VIVS is MSB to LSB */
   switch (fmt) {
   case PIPE_FORMAT_Z16_UNORM:
      return VIVS_PE_DEPTH_CONFIG_DEPTH_FORMAT_D16;
   case PIPE_FORMAT_X8Z24_UNORM:
      return VIVS_PE_DEPTH_CONFIG_DEPTH_FORMAT_D24S8;
   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
      return VIVS_PE_DEPTH_CONFIG_DEPTH_FORMAT_D24S8;
   default:
      return ETNA_NO_MATCH;
   }
}

/* render target format for MSAA */
static inline uint32_t
translate_msaa_format(enum pipe_format fmt)
{
   /* Note: Pipe format convention is LSB to MSB, VIVS is MSB to LSB */
   switch (fmt) {
   case PIPE_FORMAT_B4G4R4X4_UNORM:
      return COLOR_COMPRESSION_FORMAT_A4R4G4B4;
   case PIPE_FORMAT_B4G4R4A4_UNORM:
      return COLOR_COMPRESSION_FORMAT_A4R4G4B4;
   case PIPE_FORMAT_B5G5R5X1_UNORM:
      return COLOR_COMPRESSION_FORMAT_A1R5G5B5;
   case PIPE_FORMAT_B5G5R5A1_UNORM:
      return COLOR_COMPRESSION_FORMAT_A1R5G5B5;
   case PIPE_FORMAT_B5G6R5_UNORM:
      return COLOR_COMPRESSION_FORMAT_R5G6B5;
   case PIPE_FORMAT_B8G8R8X8_UNORM:
      return COLOR_COMPRESSION_FORMAT_X8R8G8B8;
   case PIPE_FORMAT_B8G8R8A8_UNORM:
      return COLOR_COMPRESSION_FORMAT_A8R8G8B8;
   /* MSAA with YUYV not supported */
   default:
      return ETNA_NO_MATCH;
   }
}

/* Return normalization flag for vertex element format */
static inline uint32_t
translate_vertex_format_normalize(enum pipe_format fmt)
{
   const struct util_format_description *desc = util_format_description(fmt);
   if (!desc)
      return VIVS_FE_VERTEX_ELEMENT_CONFIG_NORMALIZE_OFF;

   /* assumes that normalization of channel 0 holds for all channels;
    * this holds for all vertex formats that we support */
   return desc->channel[0].normalized
             ? VIVS_FE_VERTEX_ELEMENT_CONFIG_NORMALIZE_ON
             : VIVS_FE_VERTEX_ELEMENT_CONFIG_NORMALIZE_OFF;
}

static inline uint32_t
translate_index_size(unsigned index_size)
{
   switch (index_size) {
   case 1:
      return VIVS_FE_INDEX_STREAM_CONTROL_TYPE_UNSIGNED_CHAR;
   case 2:
      return VIVS_FE_INDEX_STREAM_CONTROL_TYPE_UNSIGNED_SHORT;
   case 4:
      return VIVS_FE_INDEX_STREAM_CONTROL_TYPE_UNSIGNED_INT;
   default:
      DBG("Unhandled index size %i", index_size);
      return ETNA_NO_MATCH;
   }
}

static inline uint32_t
translate_draw_mode(unsigned mode)
{
   switch (mode) {
   case PIPE_PRIM_POINTS:
      return PRIMITIVE_TYPE_POINTS;
   case PIPE_PRIM_LINES:
      return PRIMITIVE_TYPE_LINES;
   case PIPE_PRIM_LINE_LOOP:
      return PRIMITIVE_TYPE_LINE_LOOP;
   case PIPE_PRIM_LINE_STRIP:
      return PRIMITIVE_TYPE_LINE_STRIP;
   case PIPE_PRIM_TRIANGLES:
      return PRIMITIVE_TYPE_TRIANGLES;
   case PIPE_PRIM_TRIANGLE_STRIP:
      return PRIMITIVE_TYPE_TRIANGLE_STRIP;
   case PIPE_PRIM_TRIANGLE_FAN:
      return PRIMITIVE_TYPE_TRIANGLE_FAN;
   case PIPE_PRIM_QUADS:
      return PRIMITIVE_TYPE_QUADS;
   default:
      DBG("Unhandled draw mode primitive %i", mode);
      return ETNA_NO_MATCH;
   }
}

/* Get size multiple for size of texture/rendertarget with a certain layout
 * This is affected by many different parameters:
 *   - A horizontal multiple of 16 is used when possible as resolve can be used
 *       at the cost of only a little bit extra memory usage.
 *   - If the surface is to be used with the resolve engine, set rs_align true.
 *       If set, a horizontal multiple of 16 will be used for tiled and linear,
 *       otherwise one of 16.  However, such a surface will be incompatible
 *       with the samplers if the GPU does hot support the HALIGN feature.
 *   - If the surface is supertiled, horizontal and vertical multiple is always 64
 *   - If the surface is multi tiled or supertiled, make sure that the vertical size
 *     is a multiple of the number of pixel pipes as well.
 * */
static inline void
etna_layout_multiple(unsigned layout, unsigned pixel_pipes, bool rs_align,
                     unsigned *paddingX, unsigned *paddingY, unsigned *halign)
{
   switch (layout) {
   case ETNA_LAYOUT_LINEAR:
      *paddingX = rs_align ? 16 : 4;
      *paddingY = 1;
      *halign = rs_align ? TEXTURE_HALIGN_SIXTEEN : TEXTURE_HALIGN_FOUR;
      break;
   case ETNA_LAYOUT_TILED:
      *paddingX = rs_align ? 16 : 4;
      *paddingY = 4;
      *halign = rs_align ? TEXTURE_HALIGN_SIXTEEN : TEXTURE_HALIGN_FOUR;
      break;
   case ETNA_LAYOUT_SUPER_TILED:
      *paddingX = 64;
      *paddingY = 64;
      *halign = TEXTURE_HALIGN_SUPER_TILED;
      break;
   case ETNA_LAYOUT_MULTI_TILED:
      *paddingX = 16;
      *paddingY = 4 * pixel_pipes;
      *halign = TEXTURE_HALIGN_SPLIT_TILED;
      break;
   case ETNA_LAYOUT_MULTI_SUPERTILED:
      *paddingX = 64;
      *paddingY = 64 * pixel_pipes;
      *halign = TEXTURE_HALIGN_SPLIT_SUPER_TILED;
      break;
   default:
      DBG("Unhandled layout %i", layout);
   }
}

static inline void etna_adjust_rs_align(unsigned num_pixelpipes,
                                        unsigned *paddingX, unsigned *paddingY)
{
   unsigned alignX = ETNA_RS_WIDTH_MASK + 1;
   unsigned alignY = (ETNA_RS_HEIGHT_MASK + 1) * num_pixelpipes;

   if (paddingX)
      *paddingX = align(*paddingX, alignX);
   if (paddingY)
      *paddingY = align(*paddingY, alignY);
}

static inline uint32_t
translate_clear_depth_stencil(enum pipe_format format, float depth,
                              unsigned stencil)
{
   uint32_t clear_value = 0;

   // XXX util_pack_color
   switch (format) {
   case PIPE_FORMAT_Z16_UNORM:
      clear_value = etna_cfloat_to_uintN(depth, 16);
      clear_value |= clear_value << 16;
      break;
   case PIPE_FORMAT_X8Z24_UNORM:
   case PIPE_FORMAT_S8_UINT_Z24_UNORM:
      clear_value = (etna_cfloat_to_uintN(depth, 24) << 8) | (stencil & 0xFF);
      break;
   default:
      DBG("Unhandled pipe format for depth stencil clear: %i", format);
   }
   return clear_value;
}

/* Convert MSAA number of samples to x and y scaling factor and
 * VIVS_GL_MULTI_SAMPLE_CONFIG value.
 * Return true if supported and false otherwise. */
static inline bool
translate_samples_to_xyscale(int num_samples, int *xscale_out, int *yscale_out,
                             uint32_t *config_out)
{
   int xscale, yscale;
   uint32_t config;

   switch (num_samples) {
   case 0:
   case 1:
      xscale = 1;
      yscale = 1;
      config = VIVS_GL_MULTI_SAMPLE_CONFIG_MSAA_SAMPLES_NONE;
      break;
   case 2:
      xscale = 2;
      yscale = 1;
      config = VIVS_GL_MULTI_SAMPLE_CONFIG_MSAA_SAMPLES_2X;
      break;
   case 4:
      xscale = 2;
      yscale = 2;
      config = VIVS_GL_MULTI_SAMPLE_CONFIG_MSAA_SAMPLES_4X;
      break;
   default:
      return false;
   }

   if (xscale_out)
      *xscale_out = xscale;
   if (yscale_out)
      *yscale_out = yscale;
   if (config_out)
      *config_out = config;

   return true;
}

#endif
