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RetroArch/gfx/drivers_shader/glslang_util.c
Tony 6d5d2e722d
Logging cleanups (#13579)
2022-01-31 18:05:23 +01:00

345 lines
8.6 KiB
C
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2017 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <retro_miscellaneous.h>
#include <file/file_path.h>
#include <file/config_file.h>
#include <streams/file_stream.h>
#include <string/stdstring.h>
#ifdef HAVE_CONFIG_H
#include "../../config.h"
#endif
#include "glslang_util.h"
#include "../../verbosity.h"
static void get_include_file(
const char *line, char *include_file, size_t len)
{
char *end = NULL;
char *start = (char*)strchr(line, '\"');
if (!start)
return;
start++;
end = (char*)strchr(start, '\"');
if (!end)
return;
*end = '\0';
strlcpy(include_file, start, len);
}
bool slang_texture_semantic_is_array(enum slang_texture_semantic sem)
{
switch (sem)
{
case SLANG_TEXTURE_SEMANTIC_ORIGINAL_HISTORY:
case SLANG_TEXTURE_SEMANTIC_PASS_OUTPUT:
case SLANG_TEXTURE_SEMANTIC_PASS_FEEDBACK:
case SLANG_TEXTURE_SEMANTIC_USER:
return true;
default:
break;
}
return false;
}
enum slang_texture_semantic slang_name_to_texture_semantic_array(
const char *name, const char **names,
unsigned *index)
{
unsigned i = 0;
while (*names)
{
const char *n = *names;
enum slang_texture_semantic semantic = (enum slang_texture_semantic)(i);
if (slang_texture_semantic_is_array(semantic))
{
size_t baselen = strlen(n);
int cmp = strncmp(n, name, baselen);
if (cmp == 0)
{
*index = (unsigned)strtoul(name + baselen, NULL, 0);
return semantic;
}
}
else if (string_is_equal(name, n))
{
*index = 0;
return semantic;
}
i++;
names++;
}
return SLANG_INVALID_TEXTURE_SEMANTIC;
}
bool glslang_read_shader_file(const char *path,
struct string_list *output, bool root_file)
{
size_t i;
char tmp[PATH_MAX_LENGTH];
union string_list_elem_attr attr;
const char *basename = NULL;
uint8_t *buf = NULL;
int64_t buf_len = 0;
struct string_list lines = {0};
bool ret = false;
tmp[0] = '\0';
attr.i = 0;
/* Sanity check */
if (string_is_empty(path) || !output)
return false;
basename = path_basename_nocompression(path);
if (string_is_empty(basename))
return false;
/* Read file contents */
if (!filestream_read_file(path, (void**)&buf, &buf_len))
{
RARCH_ERR("[slang]: Failed to open shader file: \"%s\".\n", path);
return false;
}
if (buf_len > 0)
{
/* Remove Windows '\r' chars if we encounter them */
string_remove_all_chars((char*)buf, '\r');
/* Split into lines
* (Blank lines must be included) */
string_list_initialize(&lines);
ret = string_separate_noalloc(&lines, (char*)buf, "\n");
}
/* Buffer is no longer required - clean up */
if (buf)
free(buf);
/* Sanity check */
if (!ret)
return false;
if (lines.size < 1)
goto error;
/* If this is the 'parent' shader file, ensure that first
* line is a 'VERSION' string */
if (root_file)
{
const char *line = lines.elems[0].data;
if (strncmp("#version ", line, STRLEN_CONST("#version ")))
{
RARCH_ERR("[slang]: First line of the shader must contain a valid "
"#version string.\n");
goto error;
}
if (!string_list_append(output, line, attr))
goto error;
/* Allows us to use #line to make dealing with shader
* errors easier.
* This is supported by glslang, but since we always
* use glslang statically, this is fine. */
if (!string_list_append(output,
"#extension GL_GOOGLE_cpp_style_line_directive : require",
attr))
goto error;
}
/* At least VIM treats the first line as line #1,
* so offset everything by one. */
snprintf(tmp, sizeof(tmp), "#line %u \"%s\"", root_file ? 2 : 1, basename);
if (!string_list_append(output, tmp, attr))
goto error;
/* Loop through lines of file */
for (i = root_file ? 1 : 0; i < lines.size; i++)
{
const char *line = lines.elems[i].data;
/* Check for 'include' statements */
if (!strncmp("#include ", line, STRLEN_CONST("#include ")))
{
char include_file[PATH_MAX_LENGTH];
char include_path[PATH_MAX_LENGTH];
include_file[0] = '\0';
include_path[0] = '\0';
/* Build include file path */
get_include_file(line, include_file, sizeof(include_file));
if (string_is_empty(include_file))
{
RARCH_ERR("[slang]: Invalid include statement \"%s\".\n", line);
goto error;
}
fill_pathname_resolve_relative(
include_path, path, include_file, sizeof(include_path));
/* Parse include file */
if (!glslang_read_shader_file(include_path, output, false))
goto error;
/* After including a file, use line directive
* to pull it back to current file. */
snprintf(tmp, sizeof(tmp), "#line %u \"%s\"",
(unsigned)(i + 1), basename);
if (!string_list_append(output, tmp, attr))
goto error;
}
else if (!strncmp("#endif", line, STRLEN_CONST("#endif")) ||
!strncmp("#pragma", line, STRLEN_CONST("#pragma")))
{
/* #line seems to be ignored if preprocessor tests fail,
* so we should reapply #line after each #endif.
* Add extra offset here since we're setting #line
* for the line after this one.
*/
if (!string_list_append(output, line, attr))
goto error;
snprintf(tmp, sizeof(tmp), "#line %u \"%s\"",
(unsigned)(i + 2), basename);
if (!string_list_append(output, tmp, attr))
goto error;
}
else
if (!string_list_append(output, line, attr))
goto error;
}
string_list_deinitialize(&lines);
return true;
error:
string_list_deinitialize(&lines);
return false;
}
const char *glslang_format_to_string(enum glslang_format fmt)
{
static const char *glslang_formats[] = {
"UNKNOWN",
"R8_UNORM",
"R8_UINT",
"R8_SINT",
"R8G8_UNORM",
"R8G8_UINT",
"R8G8_SINT",
"R8G8B8A8_UNORM",
"R8G8B8A8_UINT",
"R8G8B8A8_SINT",
"R8G8B8A8_SRGB",
"A2B10G10R10_UNORM_PACK32",
"A2B10G10R10_UINT_PACK32",
"R16_UINT",
"R16_SINT",
"R16_SFLOAT",
"R16G16_UINT",
"R16G16_SINT",
"R16G16_SFLOAT",
"R16G16B16A16_UINT",
"R16G16B16A16_SINT",
"R16G16B16A16_SFLOAT",
"R32_UINT",
"R32_SINT",
"R32_SFLOAT",
"R32G32_UINT",
"R32G32_SINT",
"R32G32_SFLOAT",
"R32G32B32A32_UINT",
"R32G32B32A32_SINT",
"R32G32B32A32_SFLOAT",
};
return glslang_formats[fmt];
}
enum glslang_format glslang_find_format(const char *fmt)
{
#undef FMT
#define FMT(x) if (string_is_equal(fmt, #x)) return SLANG_FORMAT_ ## x
FMT(R8_UNORM);
FMT(R8_UINT);
FMT(R8_SINT);
FMT(R8G8_UNORM);
FMT(R8G8_UINT);
FMT(R8G8_SINT);
FMT(R8G8B8A8_UNORM);
FMT(R8G8B8A8_UINT);
FMT(R8G8B8A8_SINT);
FMT(R8G8B8A8_SRGB);
FMT(A2B10G10R10_UNORM_PACK32);
FMT(A2B10G10R10_UINT_PACK32);
FMT(R16_UINT);
FMT(R16_SINT);
FMT(R16_SFLOAT);
FMT(R16G16_UINT);
FMT(R16G16_SINT);
FMT(R16G16_SFLOAT);
FMT(R16G16B16A16_UINT);
FMT(R16G16B16A16_SINT);
FMT(R16G16B16A16_SFLOAT);
FMT(R32_UINT);
FMT(R32_SINT);
FMT(R32_SFLOAT);
FMT(R32G32_UINT);
FMT(R32G32_SINT);
FMT(R32G32_SFLOAT);
FMT(R32G32B32A32_UINT);
FMT(R32G32B32A32_SINT);
FMT(R32G32B32A32_SFLOAT);
return SLANG_FORMAT_UNKNOWN;
}
unsigned glslang_num_miplevels(unsigned width, unsigned height)
{
unsigned size = MAX(width, height);
unsigned levels = 0;
while (size)
{
levels++;
size >>= 1;
}
return levels;
}
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