mirror of https://github.com/axmolengine/axmol.git
468 lines
12 KiB
C++
468 lines
12 KiB
C++
// SPDX-License-Identifier: Apache-2.0
|
|
// ----------------------------------------------------------------------------
|
|
// Copyright 2011-2021 Arm Limited
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
|
|
// use this file except in compliance with the License. You may obtain a copy
|
|
// of the License at:
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
// License for the specific language governing permissions and limitations
|
|
// under the License.
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/**
|
|
* @brief Functions for creating in-memory ASTC image structures.
|
|
*/
|
|
|
|
#include <cassert>
|
|
#include <cstring>
|
|
|
|
#include "astcenc_internal.h"
|
|
|
|
/**
|
|
* @brief Loader pipeline function type for data fetch from memory.
|
|
*/
|
|
using pixel_loader = vfloat4(*)(const void*, int);
|
|
|
|
/**
|
|
* @brief Loader pipeline function type for swizzling data in a vector.
|
|
*/
|
|
using pixel_swizzler = vfloat4(*)(vfloat4, const astcenc_swizzle&);
|
|
|
|
/**
|
|
* @brief Loader pipeline function type for converting data in a vector to LNS.
|
|
*/
|
|
using pixel_converter = vfloat4(*)(vfloat4, vmask4);
|
|
|
|
/**
|
|
* @brief Load a 8-bit UNORM texel from a data array.
|
|
*
|
|
* @param data The data pointer.
|
|
* @param base_offset The index offset to the start of the pixel.
|
|
*/
|
|
static vfloat4 load_texel_u8(
|
|
const void* data,
|
|
int base_offset
|
|
) {
|
|
const uint8_t* data8 = static_cast<const uint8_t*>(data);
|
|
return int_to_float(vint4(data8 + base_offset)) / 255.0f;
|
|
}
|
|
|
|
/**
|
|
* @brief Load a 16-bit fp16 texel from a data array.
|
|
*
|
|
* @param data The data pointer.
|
|
* @param base_offset The index offset to the start of the pixel.
|
|
*/
|
|
static vfloat4 load_texel_f16(
|
|
const void* data,
|
|
int base_offset
|
|
) {
|
|
const uint16_t* data16 = static_cast<const uint16_t*>(data);
|
|
int r = data16[base_offset ];
|
|
int g = data16[base_offset + 1];
|
|
int b = data16[base_offset + 2];
|
|
int a = data16[base_offset + 3];
|
|
return float16_to_float(vint4(r, g, b, a));
|
|
}
|
|
|
|
/**
|
|
* @brief Load a 32-bit float texel from a data array.
|
|
*
|
|
* @param data The data pointer.
|
|
* @param base_offset The index offset to the start of the pixel.
|
|
*/
|
|
static vfloat4 load_texel_f32(
|
|
const void* data,
|
|
int base_offset
|
|
) {
|
|
const float* data32 = static_cast<const float*>(data);
|
|
return vfloat4(data32 + base_offset);
|
|
}
|
|
|
|
/**
|
|
* @brief Dummy no-op swizzle function.
|
|
*
|
|
* @param data The source RGBA vector to swizzle.
|
|
* @param swz The swizzle to use.
|
|
*/
|
|
static vfloat4 swz_texel_skip(
|
|
vfloat4 data,
|
|
const astcenc_swizzle& swz
|
|
) {
|
|
(void)swz;
|
|
return data;
|
|
}
|
|
|
|
/**
|
|
* @brief Swizzle a texel into a new arrangement.
|
|
*
|
|
* @param data The source RGBA vector to swizzle.
|
|
* @param swz The swizzle to use.
|
|
*/
|
|
static vfloat4 swz_texel(
|
|
vfloat4 data,
|
|
const astcenc_swizzle& swz
|
|
) {
|
|
alignas(16) float datas[6];
|
|
|
|
storea(data, datas);
|
|
datas[ASTCENC_SWZ_0] = 0.0f;
|
|
datas[ASTCENC_SWZ_1] = 1.0f;
|
|
|
|
return vfloat4(datas[swz.r], datas[swz.g], datas[swz.b], datas[swz.a]);
|
|
}
|
|
|
|
/**
|
|
* @brief Encode a texel that is entirely LDR linear.
|
|
*
|
|
* @param data The RGBA data to encode.
|
|
* @param lns_mask The mask for the HDR channels than need LNS encoding.
|
|
*/
|
|
static vfloat4 encode_texel_unorm(
|
|
vfloat4 data,
|
|
vmask4 lns_mask
|
|
) {
|
|
(void)lns_mask;
|
|
return data * 65535.0f;
|
|
}
|
|
|
|
/**
|
|
* @brief Encode a texel that includes at least some HDR LNS texels.
|
|
*
|
|
* @param data The RGBA data to encode.
|
|
* @param lns_mask The mask for the HDR channels than need LNS encoding.
|
|
*/
|
|
static vfloat4 encode_texel_lns(
|
|
vfloat4 data,
|
|
vmask4 lns_mask
|
|
) {
|
|
vfloat4 datav_unorm = data * 65535.0f;
|
|
vfloat4 datav_lns = float_to_lns(data);
|
|
return select(datav_unorm, datav_lns, lns_mask);
|
|
}
|
|
|
|
/* See header for documentation. */
|
|
void fetch_image_block(
|
|
astcenc_profile decode_mode,
|
|
const astcenc_image& img,
|
|
image_block& blk,
|
|
const block_size_descriptor& bsd,
|
|
unsigned int xpos,
|
|
unsigned int ypos,
|
|
unsigned int zpos,
|
|
const astcenc_swizzle& swz
|
|
) {
|
|
unsigned int xsize = img.dim_x;
|
|
unsigned int ysize = img.dim_y;
|
|
unsigned int zsize = img.dim_z;
|
|
|
|
blk.xpos = xpos;
|
|
blk.ypos = ypos;
|
|
blk.zpos = zpos;
|
|
|
|
// True if any non-identity swizzle
|
|
bool needs_swz = (swz.r != ASTCENC_SWZ_R) || (swz.g != ASTCENC_SWZ_G) ||
|
|
(swz.b != ASTCENC_SWZ_B) || (swz.a != ASTCENC_SWZ_A);
|
|
|
|
int idx = 0;
|
|
|
|
vfloat4 data_min(1e38f);
|
|
vfloat4 data_max(-1e38f);
|
|
bool grayscale = true;
|
|
|
|
// This works because we impose the same choice everywhere during encode
|
|
uint8_t rgb_lns = (decode_mode == ASTCENC_PRF_HDR) ||
|
|
(decode_mode == ASTCENC_PRF_HDR_RGB_LDR_A) ? 1 : 0;
|
|
uint8_t a_lns = decode_mode == ASTCENC_PRF_HDR ? 1 : 0;
|
|
vint4 use_lns(rgb_lns, rgb_lns, rgb_lns, a_lns);
|
|
vmask4 lns_mask = use_lns != vint4::zero();
|
|
|
|
// Set up the function pointers for loading pipeline as needed
|
|
pixel_loader loader = load_texel_u8;
|
|
if (img.data_type == ASTCENC_TYPE_F16)
|
|
{
|
|
loader = load_texel_f16;
|
|
}
|
|
else if (img.data_type == ASTCENC_TYPE_F32)
|
|
{
|
|
loader = load_texel_f32;
|
|
}
|
|
|
|
pixel_swizzler swizzler = swz_texel_skip;
|
|
if (needs_swz)
|
|
{
|
|
swizzler = swz_texel;
|
|
}
|
|
|
|
pixel_converter converter = encode_texel_unorm;
|
|
if (any(lns_mask))
|
|
{
|
|
converter = encode_texel_lns;
|
|
}
|
|
|
|
for (unsigned int z = 0; z < bsd.zdim; z++)
|
|
{
|
|
unsigned int zi = astc::min(zpos + z, zsize - 1);
|
|
void* plane = img.data[zi];
|
|
|
|
for (unsigned int y = 0; y < bsd.ydim; y++)
|
|
{
|
|
unsigned int yi = astc::min(ypos + y, ysize - 1);
|
|
|
|
for (unsigned int x = 0; x < bsd.xdim; x++)
|
|
{
|
|
unsigned int xi = astc::min(xpos + x, xsize - 1);
|
|
|
|
vfloat4 datav = loader(plane, (4 * xsize * yi) + (4 * xi));
|
|
datav = swizzler(datav, swz);
|
|
datav = converter(datav, lns_mask);
|
|
|
|
// Compute block metadata
|
|
data_min = min(data_min, datav);
|
|
data_max = max(data_max, datav);
|
|
|
|
if (grayscale && (datav.lane<0>() != datav.lane<1>() || datav.lane<0>() != datav.lane<2>()))
|
|
{
|
|
grayscale = false;
|
|
}
|
|
|
|
blk.data_r[idx] = datav.lane<0>();
|
|
blk.data_g[idx] = datav.lane<1>();
|
|
blk.data_b[idx] = datav.lane<2>();
|
|
blk.data_a[idx] = datav.lane<3>();
|
|
|
|
blk.rgb_lns[idx] = rgb_lns;
|
|
blk.alpha_lns[idx] = a_lns;
|
|
|
|
idx++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Reverse the encoding so we store origin block in the original format
|
|
vfloat4 data_enc = blk.texel(0);
|
|
vfloat4 data_enc_unorm = data_enc / 65535.0f;
|
|
vfloat4 data_enc_lns = vfloat4::zero();
|
|
|
|
if (rgb_lns || a_lns)
|
|
{
|
|
data_enc_lns = float16_to_float(lns_to_sf16(float_to_int(data_enc)));
|
|
}
|
|
|
|
blk.origin_texel = select(data_enc_unorm, data_enc_lns, lns_mask);;
|
|
|
|
// Store block metadata
|
|
blk.data_min = data_min;
|
|
blk.data_max = data_max;
|
|
blk.grayscale = grayscale;
|
|
}
|
|
|
|
/* See header for documentation. */
|
|
void write_image_block(
|
|
astcenc_image& img,
|
|
const image_block& blk,
|
|
const block_size_descriptor& bsd,
|
|
unsigned int xpos,
|
|
unsigned int ypos,
|
|
unsigned int zpos,
|
|
const astcenc_swizzle& swz
|
|
) {
|
|
unsigned int xsize = img.dim_x;
|
|
unsigned int ysize = img.dim_y;
|
|
unsigned int zsize = img.dim_z;
|
|
|
|
unsigned int x_start = xpos;
|
|
unsigned int x_end = std::min(xsize, xpos + bsd.xdim);
|
|
unsigned int x_nudge = bsd.xdim - (x_end - x_start);
|
|
|
|
unsigned int y_start = ypos;
|
|
unsigned int y_end = std::min(ysize, ypos + bsd.ydim);
|
|
unsigned int y_nudge = (bsd.ydim - (y_end - y_start)) * bsd.xdim;
|
|
|
|
unsigned int z_start = zpos;
|
|
unsigned int z_end = std::min(zsize, zpos + bsd.zdim);
|
|
|
|
float data[7];
|
|
data[ASTCENC_SWZ_0] = 0.0f;
|
|
data[ASTCENC_SWZ_1] = 1.0f;
|
|
|
|
// True if any non-identity swizzle
|
|
bool needs_swz = (swz.r != ASTCENC_SWZ_R) || (swz.g != ASTCENC_SWZ_G) ||
|
|
(swz.b != ASTCENC_SWZ_B) || (swz.a != ASTCENC_SWZ_A);
|
|
|
|
// True if any swizzle uses Z reconstruct
|
|
bool needs_z = (swz.r == ASTCENC_SWZ_Z) || (swz.g == ASTCENC_SWZ_Z) ||
|
|
(swz.b == ASTCENC_SWZ_Z) || (swz.a == ASTCENC_SWZ_Z);
|
|
|
|
int idx = 0;
|
|
if (img.data_type == ASTCENC_TYPE_U8)
|
|
{
|
|
for (unsigned int z = z_start; z < z_end; z++)
|
|
{
|
|
// Fetch the image plane
|
|
uint8_t* data8 = static_cast<uint8_t*>(img.data[z]);
|
|
|
|
for (unsigned int y = y_start; y < y_end; y++)
|
|
{
|
|
for (unsigned int x = x_start; x < x_end; x++)
|
|
{
|
|
vint4 colori = vint4::zero();
|
|
|
|
if (blk.data_r[idx] == std::numeric_limits<float>::quiet_NaN())
|
|
{
|
|
// Can't display NaN - show magenta error color
|
|
colori = vint4(0xFF, 0x00, 0xFF, 0xFF);
|
|
}
|
|
else if (needs_swz)
|
|
{
|
|
data[ASTCENC_SWZ_R] = blk.data_r[idx];
|
|
data[ASTCENC_SWZ_G] = blk.data_g[idx];
|
|
data[ASTCENC_SWZ_B] = blk.data_b[idx];
|
|
data[ASTCENC_SWZ_A] = blk.data_a[idx];
|
|
|
|
if (needs_z)
|
|
{
|
|
float xcoord = (data[0] * 2.0f) - 1.0f;
|
|
float ycoord = (data[3] * 2.0f) - 1.0f;
|
|
float zcoord = 1.0f - xcoord * xcoord - ycoord * ycoord;
|
|
if (zcoord < 0.0f)
|
|
{
|
|
zcoord = 0.0f;
|
|
}
|
|
data[ASTCENC_SWZ_Z] = (astc::sqrt(zcoord) * 0.5f) + 0.5f;
|
|
}
|
|
|
|
vfloat4 color = vfloat4(data[swz.r], data[swz.g], data[swz.b], data[swz.a]);
|
|
colori = float_to_int_rtn(min(color, 1.0f) * 255.0f);
|
|
}
|
|
else
|
|
{
|
|
vfloat4 color = blk.texel(idx);
|
|
colori = float_to_int_rtn(min(color, 1.0f) * 255.0f);
|
|
}
|
|
|
|
colori = pack_low_bytes(colori);
|
|
store_nbytes(colori, data8 + (4 * xsize * y) + (4 * x ));
|
|
|
|
idx++;
|
|
}
|
|
idx += x_nudge;
|
|
}
|
|
idx += y_nudge;
|
|
}
|
|
}
|
|
else if (img.data_type == ASTCENC_TYPE_F16)
|
|
{
|
|
for (unsigned int z = z_start; z < z_end; z++)
|
|
{
|
|
// Fetch the image plane
|
|
uint16_t* data16 = static_cast<uint16_t*>(img.data[z]);
|
|
|
|
for (unsigned int y = y_start; y < y_end; y++)
|
|
{
|
|
for (unsigned int x = x_start; x < x_end; x++)
|
|
{
|
|
vint4 color;
|
|
|
|
if (blk.data_r[idx] == std::numeric_limits<float>::quiet_NaN())
|
|
{
|
|
color = vint4(0xFFFF);
|
|
}
|
|
else if (needs_swz)
|
|
{
|
|
data[ASTCENC_SWZ_R] = blk.data_r[idx];
|
|
data[ASTCENC_SWZ_G] = blk.data_g[idx];
|
|
data[ASTCENC_SWZ_B] = blk.data_b[idx];
|
|
data[ASTCENC_SWZ_A] = blk.data_a[idx];
|
|
|
|
if (needs_z)
|
|
{
|
|
float xN = (data[0] * 2.0f) - 1.0f;
|
|
float yN = (data[3] * 2.0f) - 1.0f;
|
|
float zN = 1.0f - xN * xN - yN * yN;
|
|
if (zN < 0.0f)
|
|
{
|
|
zN = 0.0f;
|
|
}
|
|
data[ASTCENC_SWZ_Z] = (astc::sqrt(zN) * 0.5f) + 0.5f;
|
|
}
|
|
|
|
vfloat4 colorf(data[swz.r], data[swz.g], data[swz.b], data[swz.a]);
|
|
color = float_to_float16(colorf);
|
|
}
|
|
else
|
|
{
|
|
vfloat4 colorf = blk.texel(idx);
|
|
color = float_to_float16(colorf);
|
|
}
|
|
|
|
data16[(4 * xsize * y) + (4 * x )] = (uint16_t)color.lane<0>();
|
|
data16[(4 * xsize * y) + (4 * x + 1)] = (uint16_t)color.lane<1>();
|
|
data16[(4 * xsize * y) + (4 * x + 2)] = (uint16_t)color.lane<2>();
|
|
data16[(4 * xsize * y) + (4 * x + 3)] = (uint16_t)color.lane<3>();
|
|
|
|
idx++;
|
|
}
|
|
idx += x_nudge;
|
|
}
|
|
idx += y_nudge;
|
|
}
|
|
}
|
|
else // if (img.data_type == ASTCENC_TYPE_F32)
|
|
{
|
|
assert(img.data_type == ASTCENC_TYPE_F32);
|
|
|
|
for (unsigned int z = z_start; z < z_end; z++)
|
|
{
|
|
// Fetch the image plane
|
|
float* data32 = static_cast<float*>(img.data[z]);
|
|
|
|
for (unsigned int y = y_start; y < y_end; y++)
|
|
{
|
|
for (unsigned int x = x_start; x < x_end; x++)
|
|
{
|
|
vfloat4 color = blk.texel(idx);
|
|
|
|
if (color.lane<0>() == std::numeric_limits<float>::quiet_NaN())
|
|
{
|
|
color = vfloat4(std::numeric_limits<float>::quiet_NaN());
|
|
}
|
|
else if (needs_swz)
|
|
{
|
|
data[ASTCENC_SWZ_R] = color.lane<0>();
|
|
data[ASTCENC_SWZ_G] = color.lane<1>();
|
|
data[ASTCENC_SWZ_B] = color.lane<2>();
|
|
data[ASTCENC_SWZ_A] = color.lane<3>();
|
|
|
|
if (needs_z)
|
|
{
|
|
float xN = (data[0] * 2.0f) - 1.0f;
|
|
float yN = (data[3] * 2.0f) - 1.0f;
|
|
float zN = 1.0f - xN * xN - yN * yN;
|
|
if (zN < 0.0f)
|
|
{
|
|
zN = 0.0f;
|
|
}
|
|
data[ASTCENC_SWZ_Z] = (astc::sqrt(zN) * 0.5f) + 0.5f;
|
|
}
|
|
|
|
color = vfloat4(data[swz.r], data[swz.g], data[swz.b], data[swz.a]);
|
|
}
|
|
|
|
store(color, data32 + (4 * xsize * y) + (4 * x ));
|
|
|
|
idx++;
|
|
}
|
|
idx += x_nudge;
|
|
}
|
|
idx += y_nudge;
|
|
}
|
|
}
|
|
}
|