mirror of
https://github.com/libretro/RetroArch
synced 2025-01-31 15:32:59 +00:00
3029f96511
This driver should sunset the old gl2 driver, but that driver will likely live on to support really ancient and terrible GL stacks. All the worst legacy cruft has been ripped out, and it's almost a decent backend now. Requirements for slang are GL 3.2+ or GLES3. Some shaders require features which are not directly compatible with GLES2 or legacy GL. This driver shares a lot of concepts from the Vulkan driver. The slang shader stack and SPIRV-Cross are used to implement the shader spec, and the menu shaders are also shared with Vulkan.
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2017 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "slang_preprocess.h"
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#include "glslang_util.h"
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#include <vector>
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#include <string>
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#include <algorithm>
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#include <compat/strl.h>
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#include "../../verbosity.h"
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using namespace std;
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bool slang_preprocess_parse_parameters(glslang_meta& meta,
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struct video_shader *shader)
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{
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unsigned old_num_parameters = shader->num_parameters;
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/* Assumes num_parameters is
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* initialized to something sane. */
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for (auto ¶m : meta.parameters)
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{
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bool mismatch_dup = false;
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bool dup = false;
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auto itr = find_if(shader->parameters,
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shader->parameters + shader->num_parameters,
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[&](const video_shader_parameter &parsed_param)
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{
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return param.id == parsed_param.id;
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});
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if (itr != shader->parameters + shader->num_parameters)
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{
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dup = true;
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/* Allow duplicate #pragma parameter, but only
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* if they are exactly the same. */
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if (param.desc != itr->desc ||
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param.initial != itr->initial ||
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param.minimum != itr->minimum ||
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param.maximum != itr->maximum ||
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param.step != itr->step)
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{
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RARCH_ERR("[slang]: Duplicate parameters"
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" found for \"%s\", but arguments do not match.\n",
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itr->id);
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mismatch_dup = true;
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}
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}
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if (dup && !mismatch_dup)
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continue;
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if (mismatch_dup || shader->num_parameters == GFX_MAX_PARAMETERS)
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{
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shader->num_parameters = old_num_parameters;
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return false;
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}
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auto &p = shader->parameters[shader->num_parameters++];
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strlcpy(p.id, param.id.c_str(), sizeof(p.id));
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strlcpy(p.desc, param.desc.c_str(), sizeof(p.desc));
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p.initial = param.initial;
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p.minimum = param.minimum;
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p.maximum = param.maximum;
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p.step = param.step;
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p.current = param.initial;
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}
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return true;
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}
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bool slang_preprocess_parse_parameters(const char *shader_path,
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struct video_shader *shader)
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{
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glslang_meta meta;
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vector<string> lines;
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if (!glslang_read_shader_file(shader_path, &lines, true))
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return false;
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if (!glslang_parse_meta(lines, &meta))
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return false;
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return slang_preprocess_parse_parameters(meta, shader);
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}
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