1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
//
// Copyright 2022 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// loadimage_astc.cpp: Decodes ASTC encoded textures.
#ifdef ANGLE_HAS_ASTCENC
# include <astcenc.h>
#endif
#include "image_util/loadimage.h"
namespace angle
{
void LoadASTCToRGBA8Inner(size_t width,
size_t height,
size_t depth,
uint32_t blockWidth,
uint32_t blockHeight,
const uint8_t *input,
size_t inputRowPitch,
size_t inputDepthPitch,
uint8_t *output,
size_t outputRowPitch,
size_t outputDepthPitch)
{
#ifdef ANGLE_HAS_ASTCENC
astcenc_config config;
constexpr unsigned int kBlockZ = 1;
const float kQuality = ASTCENC_PRE_MEDIUM;
constexpr astcenc_profile kProfile = ASTCENC_PRF_LDR;
astcenc_error status;
status = astcenc_config_init(kProfile, blockWidth, blockHeight, kBlockZ, kQuality,
ASTCENC_FLG_DECOMPRESS_ONLY, &config);
if (status != ASTCENC_SUCCESS)
{
WARN() << "astcenc config init failed: " << astcenc_get_error_string(status);
return;
}
constexpr unsigned int kThreadCount = 1;
astcenc_context *context;
status = astcenc_context_alloc(&config, kThreadCount, &context);
if (status != ASTCENC_SUCCESS)
{
WARN() << "Could not allocate astcenc context: " << astcenc_get_error_string(status);
return;
}
// Compute the number of ASTC blocks in each dimension
uint32_t blockCountX = (static_cast<uint32_t>(width) + config.block_x - 1) / config.block_x;
uint32_t blockCountY = (static_cast<uint32_t>(height) + config.block_y - 1) / config.block_y;
// Space needed for 16 bytes of output per compressed block
size_t blockSize = blockCountX * blockCountY * 16;
astcenc_image image;
image.dim_x = static_cast<uint32_t>(width);
image.dim_y = static_cast<uint32_t>(height);
image.dim_z = 1;
image.data_type = ASTCENC_TYPE_U8;
image.data = reinterpret_cast<void **>(&output);
constexpr astcenc_swizzle swizzle{ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A};
status = astcenc_decompress_image(context, input, blockSize, &image, &swizzle, 0);
if (status != ASTCENC_SUCCESS)
{
WARN() << "astcenc decompress failed: " << astcenc_get_error_string(status);
}
astcenc_context_free(context);
#else
ERR() << "Trying to decode ASTC without having ASTC support built.";
#endif
}
} // namespace angle
|
