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123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
// DR. ROBOTNIK'S RING RACERS
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//-----------------------------------------------------------------------------
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// Copyright (C) 2025 by Ronald "Eidolon" Kinard
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// Copyright (C) 2025 by Kart Krew
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//
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// This program is free software distributed under the
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// terms of the GNU General Public License, version 2.
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// See the 'LICENSE' file for more details.
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//-----------------------------------------------------------------------------
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#include "rhi_gl2_platform.hpp"
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#include <array>
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#include <string>
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#include <sstream>
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#include <SDL.h>
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#include "../core/string.h"
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#include "../core/vector.hpp"
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#include "../cxxutil.hpp"
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#include "../doomstat.h" // mainwads
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#include "../w_wad.h"
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#include "../z_zone.h"
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using namespace srb2;
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using namespace srb2::rhi;
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SdlGl2Platform::~SdlGl2Platform() = default;
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void SdlGl2Platform::present()
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{
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SRB2_ASSERT(window != nullptr);
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SRB2_ASSERT(SDL_GetWindowID(window) != 0);
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SDL_GL_SwapWindow(window);
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}
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static std::array<srb2::String, 2> glsllist_lump_names(const char* name)
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{
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srb2::String vertex_list_name = fmt::format("rhi_glsllist_{}_vertex.txt", name);
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srb2::String fragment_list_name = fmt::format("rhi_glsllist_{}_fragment.txt", name);
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return {std::move(vertex_list_name), std::move(fragment_list_name)};
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}
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static srb2::Vector<srb2::String> get_sources_from_glsllist_lump(const char* lumpname)
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{
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size_t buffer_size;
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if (!W_ReadShader(lumpname, &buffer_size, nullptr))
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{
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throw std::runtime_error(fmt::format("Unable to find glsllist lump {}", lumpname));
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}
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srb2::String glsllist_lump_data;
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glsllist_lump_data.resize(buffer_size);
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if (!W_ReadShader(lumpname, &buffer_size, glsllist_lump_data.data()))
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{
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throw std::runtime_error(fmt::format("Unable to read glsllist lump {}", lumpname));
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}
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std::istringstream glsllist(glsllist_lump_data);
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srb2::Vector<srb2::String> sources;
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for (std::string line; std::getline(glsllist, line); )
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{
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if (line.empty())
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{
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continue;
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}
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if (line[0] == '#')
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{
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continue;
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}
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if (line.back() == '\r')
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{
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line.pop_back();
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}
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// Compat: entries not ending in .glsl should append, for new shader file lookup system
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size_t glsl_pos = line.find(".glsl");
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if (line.size() < 5 || glsl_pos == line.npos || glsl_pos != line.size() - 5)
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{
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line.append(".glsl");
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}
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size_t source_lump_size;
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if (!W_ReadShader(line.c_str(), &source_lump_size, nullptr))
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{
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throw std::runtime_error(fmt::format("Unable to find glsl source lump lump {}", line));
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}
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srb2::String source_lump;
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source_lump.resize(source_lump_size);
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if (!W_ReadShader(line.c_str(), &source_lump_size, source_lump.data()))
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{
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throw std::runtime_error(fmt::format("Unable to read glsl source lump lump {}", line));
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}
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sources.emplace_back(source_lump);
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}
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return sources;
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}
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std::tuple<srb2::Vector<srb2::String>, srb2::Vector<srb2::String>>
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SdlGl2Platform::find_shader_sources(const char* name)
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{
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std::array<srb2::String, 2> glsllist_names = glsllist_lump_names(name);
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srb2::Vector<srb2::String> vertex_sources = get_sources_from_glsllist_lump(glsllist_names[0].c_str());
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srb2::Vector<srb2::String> fragment_sources = get_sources_from_glsllist_lump(glsllist_names[1].c_str());
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return std::make_tuple(std::move(vertex_sources), std::move(fragment_sources));
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}
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rhi::Rect SdlGl2Platform::get_default_framebuffer_dimensions()
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{
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SRB2_ASSERT(window != nullptr);
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int w;
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int h;
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SDL_GL_GetDrawableSize(window, &w, &h);
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return {0, 0, static_cast<uint32_t>(w), static_cast<uint32_t>(h)};
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}
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