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runtime_gl.cpp
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runtime_gl.cpp
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/*
* Copyright (C) 2014 Patrick Mours. All rights reserved.
* License: https://github.com/crosire/reshade#license
*/
#include "dll_log.hpp"
#include "dll_config.hpp"
#include "runtime_gl.hpp"
#include "runtime_objects.hpp"
#include <imgui.h>
namespace reshade::opengl
{
struct tex_data
{
GLuint id[2] = {};
GLuint levels = 0;
GLenum internal_format = GL_NONE;
};
struct sampler_data
{
GLuint id;
tex_data *texture;
bool is_srgb_format;
};
struct pass_data
{
GLuint fbo = 0;
GLuint program = 0;
GLenum blend_eq_color = GL_NONE;
GLenum blend_eq_alpha = GL_NONE;
GLenum blend_src = GL_NONE;
GLenum blend_src_alpha = GL_NONE;
GLenum blend_dest = GL_NONE;
GLenum blend_dest_alpha = GL_NONE;
GLenum stencil_func = GL_NONE;
GLenum stencil_op_fail = GL_NONE;
GLenum stencil_op_z_fail = GL_NONE;
GLenum stencil_op_z_pass = GL_NONE;
GLenum draw_targets[8] = {};
std::vector<tex_data *> storages;
std::vector<sampler_data> samplers;
};
struct technique_data
{
GLuint query = 0;
bool query_in_flight = false;
std::vector<pass_data> passes;
};
}
reshade::opengl::runtime_gl::runtime_gl()
{
GLint major = 0, minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &major);
glGetIntegerv(GL_MINOR_VERSION, &minor);
_renderer_id = 0x10000 | (major << 12) | (minor << 8);
const GLubyte *const name = glGetString(GL_RENDERER);
const GLubyte *const version = glGetString(GL_VERSION);
LOG(INFO) << "Running on " << name << " using OpenGL " << version;
// Query vendor and device ID from Windows assuming we are running on the primary display device
// This is done because the information reported by OpenGL is not always reflecting the actual rendering device (e.g. on NVIDIA Optimus laptops)
DISPLAY_DEVICEA dd = { sizeof(dd) };
for (DWORD i = 0; EnumDisplayDevicesA(nullptr, i, &dd, 0) != FALSE; ++i)
{
if ((dd.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) != 0)
{
std::sscanf(dd.DeviceID, "PCI\\VEN_%x&DEV_%x", &_vendor_id, &_device_id);
break;
}
}
// Check for special extension to detect whether this is a compatibility context (https://www.khronos.org/opengl/wiki/OpenGL_Context#OpenGL_3.1_and_ARB_compatibility)
GLint num_extensions = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
for (GLint i = 0; i < num_extensions; ++i)
{
const GLubyte *const extension = glGetStringi(GL_EXTENSIONS, i);
if (std::strcmp(reinterpret_cast<const char *>(extension), "GL_ARB_compatibility") == 0)
{
_compatibility_context = true;
break;
}
}
#if RESHADE_GUI
subscribe_to_ui("OpenGL", [this]() {
// Add some information about the device and driver to the UI
ImGui::Text("OpenGL %s", glGetString(GL_VERSION));
ImGui::TextUnformatted(reinterpret_cast<const char *>(glGetString(GL_RENDERER)));
#if RESHADE_DEPTH
draw_depth_debug_menu();
#endif
});
#endif
subscribe_to_load_config([this](const ini_file &config) {
// Reserve a fixed amount of texture names by default to work around issues in old OpenGL games (which will use a compatibility context)
auto num_reserve_texture_names = _compatibility_context ? 512u : 0u;
config.get("APP", "ReserveTextureNames", num_reserve_texture_names);
_reserved_texture_names.resize(num_reserve_texture_names);
#if RESHADE_DEPTH
auto force_default_depth_override = false;
config.get("DEPTH", "ForceMainDepthBuffer", force_default_depth_override);
config.get("DEPTH", "DepthCopyBeforeClears", _state_tracking.preserve_depth_buffers);
config.get("DEPTH", "DepthCopyAtClearIndex", _state_tracking.depthstencil_clear_index.second);
config.get("DEPTH", "UseAspectRatioHeuristics", _state_tracking.use_aspect_ratio_heuristics);
if (force_default_depth_override)
_depth_source_override = 0; // Zero has a special meaning and corresponds to the default depth buffer
});
subscribe_to_save_config([this](ini_file &config) {
config.set("DEPTH", "ForceMainDepthBuffer", _depth_source_override == 0);
config.set("DEPTH", "DepthCopyBeforeClears", _state_tracking.preserve_depth_buffers);
config.set("DEPTH", "DepthCopyAtClearIndex", _state_tracking.depthstencil_clear_index.second);
config.set("DEPTH", "UseAspectRatioHeuristics", _state_tracking.use_aspect_ratio_heuristics);
#endif
});
#ifndef NDEBUG
glEnable(GL_DEBUG_OUTPUT);
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
glDebugMessageCallback([](unsigned int /*source*/, unsigned int type, unsigned int /*id*/, unsigned int /*severity*/, int /*length*/, const char *message, const void */*userParam*/) {
if (type == GL_DEBUG_TYPE_ERROR || type == GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR)
OutputDebugStringA(message), OutputDebugStringA("\n");
}, nullptr);
#endif
}
reshade::opengl::runtime_gl::~runtime_gl()
{
on_reset();
}
bool reshade::opengl::runtime_gl::on_init(HWND hwnd, unsigned int width, unsigned int height)
{
RECT window_rect = {};
GetClientRect(hwnd, &window_rect);
const HDC hdc = GetDC(hwnd);
PIXELFORMATDESCRIPTOR pfd = { sizeof(pfd) };
DescribePixelFormat(hdc, GetPixelFormat(hdc), sizeof(pfd), &pfd);
_width = width;
_height = height;
_window_width = window_rect.right;
_window_height = window_rect.bottom;
_color_bit_depth = std::min(pfd.cRedBits, std::min(pfd.cGreenBits, pfd.cBlueBits));
switch (pfd.cDepthBits)
{
default:
case 0: _default_depth_format = GL_NONE; // No depth in this pixel format
break;
case 16: _default_depth_format = GL_DEPTH_COMPONENT16;
break;
case 24: _default_depth_format = pfd.cStencilBits ? GL_DEPTH24_STENCIL8 : GL_DEPTH_COMPONENT24;
break;
case 32: _default_depth_format = pfd.cStencilBits ? GL_DEPTH32F_STENCIL8 : GL_DEPTH_COMPONENT32;
break;
}
// Initialize default frame buffer information
_state_tracking.reset(_width, _height, _default_depth_format);
// Capture and later restore so that the resource creation code below does not affect the application state
_app_state.capture(_compatibility_context);
// Some games (like Hot Wheels Velocity X) use fixed texture names, which can clash with the ones ReShade generates below, since most implementations will return values linearly
// Reserve a configurable range of names for those games to work around this
if (!_reserved_texture_names.empty())
glGenTextures(static_cast<GLsizei>(_reserved_texture_names.size()), _reserved_texture_names.data());
glGenBuffers(NUM_BUF, _buf);
glGenTextures(NUM_TEX, _tex);
glGenVertexArrays(NUM_VAO, _vao);
glGenFramebuffers(NUM_FBO, _fbo);
glGenRenderbuffers(NUM_RBO, _rbo);
glBindTexture(GL_TEXTURE_2D, _tex[TEX_BACK]);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, _width, _height);
glTextureView(_tex[TEX_BACK_SRGB], GL_TEXTURE_2D, _tex[TEX_BACK], GL_SRGB8_ALPHA8, 0, 1, 0, 1);
glBindRenderbuffer(GL_RENDERBUFFER, _rbo[RBO_COLOR]);
glRenderbufferStorage(GL_RENDERBUFFER, GL_SRGB8_ALPHA8, _width, _height);
glBindRenderbuffer(GL_RENDERBUFFER, _rbo[RBO_STENCIL]);
// As of OpenGL 4.3 support for GL_STENCIL_INDEX8 is a requirement for render buffers
glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, _width, _height);
glBindFramebuffer(GL_FRAMEBUFFER, _fbo[FBO_BACK]);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, _rbo[RBO_COLOR]);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, _rbo[RBO_STENCIL]);
assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
glBindFramebuffer(GL_FRAMEBUFFER, _fbo[FBO_BLIT]);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, _tex[TEX_BACK_SRGB], 0);
assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
const GLchar *mipmap_shader[] = {
"#version 430\n"
"layout(binding = 0) uniform sampler2D src;\n"
"layout(binding = 1) uniform writeonly image2D dest;\n"
"layout(location = 0) uniform vec3 info;\n"
"layout(local_size_x = 8, local_size_y = 8) in;\n"
"void main()\n"
"{\n"
" vec2 uv = info.xy * (vec2(gl_GlobalInvocationID.xy) + vec2(0.5));\n"
" imageStore(dest, ivec2(gl_GlobalInvocationID.xy), textureLod(src, uv, int(info.z)));\n"
"}\n"
};
const GLuint mipmap_cs = glCreateShader(GL_COMPUTE_SHADER);
glShaderSource(mipmap_cs, 1, mipmap_shader, 0);
glCompileShader(mipmap_cs);
_mipmap_program = glCreateProgram();
glAttachShader(_mipmap_program, mipmap_cs);
glLinkProgram(_mipmap_program);
glDeleteShader(mipmap_cs);
#if RESHADE_DEPTH
// Initialize depth texture and FBO by assuming they refer to the default frame buffer
_has_depth_texture = _default_depth_format != GL_NONE;
if (_has_depth_texture)
{
_copy_depth_source = true;
_depth_source_width = _width;
_depth_source_height = _height;
_depth_source_format = _default_depth_format;
glBindTexture(GL_TEXTURE_2D, _tex[TEX_DEPTH]);
glTexStorage2D(GL_TEXTURE_2D, 1, _depth_source_format, _depth_source_width, _depth_source_height);
glBindFramebuffer(GL_FRAMEBUFFER, _fbo[FBO_DEPTH_DEST]);
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, _tex[TEX_DEPTH], 0);
assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
}
#endif
#if RESHADE_GUI
init_imgui_resources();
#endif
_app_state.apply(_compatibility_context);
return runtime::on_init(hwnd);
}
void reshade::opengl::runtime_gl::on_reset()
{
runtime::on_reset();
_state_tracking.release();
glDeleteBuffers(NUM_BUF, _buf);
glDeleteTextures(NUM_TEX, _tex);
glDeleteTextures(static_cast<GLsizei>(_reserved_texture_names.size()), _reserved_texture_names.data());
glDeleteVertexArrays(NUM_VAO, _vao);
glDeleteFramebuffers(NUM_FBO, _fbo);
glDeleteRenderbuffers(NUM_RBO, _rbo);
std::memset(_buf, 0, sizeof(_vao));
std::memset(_tex, 0, sizeof(_tex));
std::memset(_vao, 0, sizeof(_vao));
std::memset(_fbo, 0, sizeof(_fbo));
std::memset(_rbo, 0, sizeof(_rbo));
glDeleteProgram(_mipmap_program);
_mipmap_program = 0;
#if RESHADE_DEPTH
_depth_source = 0;
_depth_source_width = 0;
_depth_source_height = 0;
_depth_source_format = 0;
_depth_source_override = std::numeric_limits<GLuint>::max();
_has_depth_texture = false;
_copy_depth_source = false;
#endif
#if RESHADE_GUI
glDeleteProgram(_imgui.program);
_imgui.program = 0;
#endif
}
void reshade::opengl::runtime_gl::on_present()
{
if (!_is_initialized)
return;
_app_state.capture(_compatibility_context);
#if RESHADE_DEPTH
update_depth_texture_bindings(_has_high_network_activity ? state_tracking::depthstencil_info { 0 } :
_state_tracking.find_best_depth_texture(_width, _height, _depth_source_override));
#endif
// Set clip space to something consistent
if (gl3wProcs.gl.ClipControl != nullptr)
glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
// Copy back buffer to RBO (and flip it vertically)
glDisable(GL_SCISSOR_TEST);
glDisable(GL_FRAMEBUFFER_SRGB);
glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _fbo[FBO_BACK]);
glReadBuffer(GL_BACK);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
glBlitFramebuffer(0, 0, _width, _height, 0, _height, _width, 0, GL_COLOR_BUFFER_BIT, GL_NEAREST);
_current_fbo = _fbo[FBO_BACK];
#if RESHADE_DEPTH
// Copy depth from FBO to depth texture (and flip it vertically)
if (_copy_depth_source)
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, _depth_source == 0 ? 0 : _fbo[FBO_DEPTH_SRC]);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _fbo[FBO_DEPTH_DEST]);
glBlitFramebuffer(0, 0, _depth_source_width, _depth_source_height, 0, _depth_source_height, _depth_source_width, 0, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
}
#endif
update_and_render_effects();
// Copy results from RBO to back buffer (and flip it back vertically)
glDisable(GL_SCISSOR_TEST);
glDisable(GL_FRAMEBUFFER_SRGB);
glBindFramebuffer(GL_READ_FRAMEBUFFER, _fbo[FBO_BACK]);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glReadBuffer(GL_COLOR_ATTACHMENT0);
glDrawBuffer(GL_BACK);
glBlitFramebuffer(0, 0, _width, _height, 0, _height, _width, 0, GL_COLOR_BUFFER_BIT, GL_NEAREST);
_current_fbo = 0;
runtime::on_present();
_state_tracking.reset(_width, _height, _default_depth_format);
// Apply previous state from application
_app_state.apply(_compatibility_context);
}
bool reshade::opengl::runtime_gl::capture_screenshot(uint8_t *buffer) const
{
assert(_app_state.has_state);
glBindFramebuffer(GL_READ_FRAMEBUFFER, _current_fbo);
glReadBuffer(_current_fbo == 0 ? GL_BACK : GL_COLOR_ATTACHMENT0);
glReadPixels(0, 0, GLsizei(_width), GLsizei(_height), GL_RGBA, GL_UNSIGNED_BYTE, buffer);
// Flip image vertically (unless it came from the RBO, which is already upside down)
if (_current_fbo == 0)
{
for (unsigned int y = 0, pitch = _width * 4; y * 2 < _height; ++y)
{
const auto i1 = y * pitch;
const auto i2 = (_height - 1 - y) * pitch;
for (unsigned int x = 0; x < pitch; x += 4)
{
std::swap(buffer[i1 + x + 0], buffer[i2 + x + 0]);
std::swap(buffer[i1 + x + 1], buffer[i2 + x + 1]);
std::swap(buffer[i1 + x + 2], buffer[i2 + x + 2]);
std::swap(buffer[i1 + x + 3], buffer[i2 + x + 3]);
}
}
}
return true;
}
bool reshade::opengl::runtime_gl::init_effect(size_t index)
{
assert(_app_state.has_state); // Make sure all binds below are reset later when application state is restored
effect &effect = _effects[index];
// Add specialization constant defines to source code
std::vector<GLuint> spec_data;
std::vector<GLuint> spec_constants;
if (!effect.module.spirv.empty())
{
for (const reshadefx::uniform_info &constant : effect.module.spec_constants)
{
const GLuint id = static_cast<GLuint>(spec_constants.size());
spec_data.push_back(constant.initializer_value.as_uint[0]);
spec_constants.push_back(id);
}
}
// Compile all entry points
std::unordered_map<std::string, GLuint> entry_points;
for (const reshadefx::entry_point &entry_point : effect.module.entry_points)
{
GLuint shader_type = GL_NONE;
switch (entry_point.type)
{
case reshadefx::shader_type::vs:
shader_type = GL_VERTEX_SHADER;
break;
case reshadefx::shader_type::ps:
shader_type = GL_FRAGMENT_SHADER;
break;
case reshadefx::shader_type::cs:
shader_type = GL_COMPUTE_SHADER;
break;
}
GLuint shader_object = glCreateShader(shader_type);
entry_points[entry_point.name] = shader_object;
if (!effect.module.spirv.empty())
{
assert(_renderer_id >= 0x14600); // Core since OpenGL 4.6 (see https://www.khronos.org/opengl/wiki/SPIR-V)
assert(gl3wProcs.gl.ShaderBinary != nullptr && gl3wProcs.gl.SpecializeShader != nullptr);
glShaderBinary(1, &shader_object, GL_SHADER_BINARY_FORMAT_SPIR_V, effect.module.spirv.data(), static_cast<GLsizei>(effect.module.spirv.size() * sizeof(uint32_t)));
glSpecializeShader(shader_object, entry_point.name.c_str(), GLuint(spec_constants.size()), spec_constants.data(), spec_data.data());
}
else
{
std::string defines = "#version 430\n";
defines += "#define ENTRY_POINT_" + entry_point.name + " 1\n";
if (entry_point.type == reshadefx::shader_type::vs)
{
// OpenGL does not allow using 'discard' in the vertex shader profile
defines += "#define discard\n";
// 'dFdx', 'dFdx' and 'fwidth' too are only available in fragment shaders
defines += "#define dFdx(x) x\n";
defines += "#define dFdy(y) y\n";
defines += "#define fwidth(p) p\n";
}
if (entry_point.type != reshadefx::shader_type::cs)
{
// OpenGL does not allow using 'shared' in vertex/fragment shader profile
defines += "#define shared\n";
defines += "#define atomicAdd(a, b) a\n";
defines += "#define atomicAnd(a, b) a\n";
defines += "#define atomicOr(a, b) a\n";
defines += "#define atomicXor(a, b) a\n";
defines += "#define atomicMin(a, b) a\n";
defines += "#define atomicMax(a, b) a\n";
defines += "#define atomicExchange(a, b) a\n";
defines += "#define atomicCompSwap(a, b, c) a\n";
// Barrier intrinsics are only available in compute shaders
defines += "#define barrier()\n";
defines += "#define memoryBarrier()\n";
defines += "#define groupMemoryBarrier()\n";
}
defines += "#line 1 0\n"; // Reset line number, so it matches what is shown when viewing the generated code
defines += effect.preamble;
GLsizei lengths[] = { static_cast<GLsizei>(defines.size()), static_cast<GLsizei>(effect.module.hlsl.size()) };
const GLchar *sources[] = { defines.c_str(), effect.module.hlsl.c_str() };
glShaderSource(shader_object, 2, sources, lengths);
glCompileShader(shader_object);
}
GLint status = GL_FALSE;
glGetShaderiv(shader_object, GL_COMPILE_STATUS, &status);
if (GL_FALSE == status)
{
GLint log_size = 0;
glGetShaderiv(shader_object, GL_INFO_LOG_LENGTH, &log_size);
std::vector<char> log(log_size);
glGetShaderInfoLog(shader_object, log_size, nullptr, log.data());
effect.errors += log.data();
for (auto &it : entry_points)
glDeleteShader(it.second);
// No need to setup resources if any of the shaders failed to compile
return false;
}
}
if (index >= _effect_ubos.size())
_effect_ubos.resize(index + 1);
if (!effect.uniform_data_storage.empty())
{
GLuint &ubo = _effect_ubos[index];
glGenBuffers(1, &ubo);
glBindBuffer(GL_UNIFORM_BUFFER, ubo);
glBufferData(GL_UNIFORM_BUFFER, effect.uniform_data_storage.size(), effect.uniform_data_storage.data(), GL_DYNAMIC_DRAW);
}
bool success = true;
assert(effect.module.num_texture_bindings == 0); // Use combined texture samplers
for (technique &technique : _techniques)
{
if (technique.impl != nullptr || technique.effect_index != index)
continue;
// Copy construct new technique implementation instead of move because effect may contain multiple techniques
auto impl = new technique_data();
technique.impl = impl;
glGenQueries(1, &impl->query);
impl->passes.resize(technique.passes.size());
for (size_t pass_index = 0; pass_index < technique.passes.size(); ++pass_index)
{
pass_data &pass_data = impl->passes[pass_index];
reshadefx::pass_info &pass_info = technique.passes[pass_index];
pass_data.program = glCreateProgram();
if (!pass_info.cs_entry_point.empty())
{
const GLuint cs_shader_id = entry_points.at(pass_info.cs_entry_point);
glAttachShader(pass_data.program, cs_shader_id);
glLinkProgram(pass_data.program);
glDetachShader(pass_data.program, cs_shader_id);
pass_data.storages.resize(effect.module.num_storage_bindings);
for (const reshadefx::storage_info &info : pass_info.storages)
{
const texture &texture = look_up_texture_by_name(info.texture_name);
pass_data.storages[info.binding] = static_cast<tex_data *>(texture.impl);
}
}
else
{
// Link program from input shaders
const GLuint vs_shader_id = entry_points.at(pass_info.vs_entry_point);
const GLuint fs_shader_id = entry_points.at(pass_info.ps_entry_point);
glAttachShader(pass_data.program, vs_shader_id);
glAttachShader(pass_data.program, fs_shader_id);
glLinkProgram(pass_data.program);
glDetachShader(pass_data.program, vs_shader_id);
glDetachShader(pass_data.program, fs_shader_id);
const auto convert_blend_op = [](reshadefx::pass_blend_op value) -> GLenum {
switch (value)
{
default:
case reshadefx::pass_blend_op::add: return GL_FUNC_ADD;
case reshadefx::pass_blend_op::subtract: return GL_FUNC_SUBTRACT;
case reshadefx::pass_blend_op::rev_subtract: return GL_FUNC_REVERSE_SUBTRACT;
case reshadefx::pass_blend_op::min: return GL_MIN;
case reshadefx::pass_blend_op::max: return GL_MAX;
}
};
const auto convert_blend_func = [](reshadefx::pass_blend_func value) -> GLenum {
switch (value)
{
case reshadefx::pass_blend_func::zero: return GL_ZERO;
default:
case reshadefx::pass_blend_func::one: return GL_ONE;
case reshadefx::pass_blend_func::src_color: return GL_SRC_COLOR;
case reshadefx::pass_blend_func::src_alpha: return GL_SRC_ALPHA;
case reshadefx::pass_blend_func::inv_src_color: return GL_ONE_MINUS_SRC_COLOR;
case reshadefx::pass_blend_func::inv_src_alpha: return GL_ONE_MINUS_SRC_ALPHA;
case reshadefx::pass_blend_func::dst_color: return GL_DST_COLOR;
case reshadefx::pass_blend_func::dst_alpha: return GL_DST_ALPHA;
case reshadefx::pass_blend_func::inv_dst_color: return GL_ONE_MINUS_DST_COLOR;
case reshadefx::pass_blend_func::inv_dst_alpha: return GL_ONE_MINUS_DST_ALPHA;
}
};
const auto convert_stencil_op = [](reshadefx::pass_stencil_op value) -> GLenum {
switch (value)
{
case reshadefx::pass_stencil_op::zero: return GL_ZERO;
default:
case reshadefx::pass_stencil_op::keep: return GL_KEEP;
case reshadefx::pass_stencil_op::invert: return GL_INVERT;
case reshadefx::pass_stencil_op::replace: return GL_REPLACE;
case reshadefx::pass_stencil_op::incr: return GL_INCR_WRAP;
case reshadefx::pass_stencil_op::incr_sat: return GL_INCR;
case reshadefx::pass_stencil_op::decr: return GL_DECR_WRAP;
case reshadefx::pass_stencil_op::decr_sat: return GL_DECR;
}
};
const auto convert_stencil_func = [](reshadefx::pass_stencil_func value) -> GLenum {
switch (value)
{
case reshadefx::pass_stencil_func::never: return GL_NEVER;
case reshadefx::pass_stencil_func::equal: return GL_EQUAL;
case reshadefx::pass_stencil_func::not_equal: return GL_NOTEQUAL;
case reshadefx::pass_stencil_func::less: return GL_LESS;
case reshadefx::pass_stencil_func::less_equal: return GL_LEQUAL;
case reshadefx::pass_stencil_func::greater: return GL_GREATER;
case reshadefx::pass_stencil_func::greater_equal: return GL_GEQUAL;
default:
case reshadefx::pass_stencil_func::always: return GL_ALWAYS;
}
};
pass_data.blend_eq_color = convert_blend_op(pass_info.blend_op);
pass_data.blend_eq_alpha = convert_blend_op(pass_info.blend_op_alpha);
pass_data.blend_src = convert_blend_func(pass_info.src_blend);
pass_data.blend_dest = convert_blend_func(pass_info.dest_blend);
pass_data.blend_src_alpha = convert_blend_func(pass_info.src_blend_alpha);
pass_data.blend_dest_alpha = convert_blend_func(pass_info.dest_blend_alpha);
pass_data.stencil_func = convert_stencil_func(pass_info.stencil_comparison_func);
pass_data.stencil_op_z_pass = convert_stencil_op(pass_info.stencil_op_pass);
pass_data.stencil_op_fail = convert_stencil_op(pass_info.stencil_op_fail);
pass_data.stencil_op_z_fail = convert_stencil_op(pass_info.stencil_op_depth_fail);
glGenFramebuffers(1, &pass_data.fbo);
glBindFramebuffer(GL_FRAMEBUFFER, pass_data.fbo);
if (pass_info.render_target_names[0].empty())
{
pass_info.viewport_width = _width;
pass_info.viewport_height = _height;
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, _rbo[RBO_COLOR]);
pass_data.draw_targets[0] = GL_COLOR_ATTACHMENT0;
}
else
{
for (uint32_t k = 0; k < 8 && !pass_info.render_target_names[k].empty(); ++k)
{
tex_data *const tex_impl = static_cast<tex_data *>(
look_up_texture_by_name(pass_info.render_target_names[k]).impl);
pass_data.draw_targets[k] = GL_COLOR_ATTACHMENT0 + k;
glFramebufferTexture(GL_FRAMEBUFFER, pass_data.draw_targets[k], tex_impl->id[pass_info.srgb_write_enable], 0);
// Add texture to list of modified resources so mipmaps are generated at end of pass
pass_data.storages.push_back(tex_impl);
}
assert(pass_info.viewport_width != 0 && pass_info.viewport_height != 0);
}
if (pass_info.stencil_enable && // Only need to attach stencil if stencil is actually used in this pass
pass_info.viewport_width == _width &&
pass_info.viewport_height == _height)
{
// Only attach stencil when viewport matches back buffer or else the frame buffer will always be resized to those dimensions
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, _rbo[RBO_STENCIL]);
}
assert(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
}
GLint status = GL_FALSE;
glGetProgramiv(pass_data.program, GL_LINK_STATUS, &status);
if (GL_FALSE == status)
{
GLint log_size = 0;
glGetProgramiv(pass_data.program, GL_INFO_LOG_LENGTH, &log_size);
std::vector<char> log(log_size);
glGetProgramInfoLog(pass_data.program, log_size, nullptr, log.data());
effect.errors += log.data();
LOG(ERROR) << "Failed to link program for pass " << pass_index << " in technique '" << technique.name << "'!";
success = false;
break;
}
pass_data.samplers.resize(effect.module.num_sampler_bindings);
for (const reshadefx::sampler_info &info : pass_info.samplers)
{
const texture &texture = look_up_texture_by_name(info.texture_name);
// Hash sampler state to avoid duplicated sampler objects
size_t hash = 2166136261;
hash = (hash * 16777619) ^ static_cast<uint32_t>(info.address_u);
hash = (hash * 16777619) ^ static_cast<uint32_t>(info.address_v);
hash = (hash * 16777619) ^ static_cast<uint32_t>(info.address_w);
hash = (hash * 16777619) ^ static_cast<uint32_t>(info.filter);
hash = (hash * 16777619) ^ reinterpret_cast<const uint32_t &>(info.lod_bias);
hash = (hash * 16777619) ^ reinterpret_cast<const uint32_t &>(info.min_lod);
hash = (hash * 16777619) ^ reinterpret_cast<const uint32_t &>(info.max_lod);
std::unordered_map<size_t, GLuint>::iterator it = _effect_sampler_states.find(hash);
if (it == _effect_sampler_states.end())
{
GLenum min_filter = GL_NONE, mag_filter = GL_NONE;
switch (info.filter)
{
case reshadefx::texture_filter::min_mag_mip_point:
min_filter = GL_NEAREST_MIPMAP_NEAREST;
mag_filter = GL_NEAREST;
break;
case reshadefx::texture_filter::min_mag_point_mip_linear:
min_filter = GL_NEAREST_MIPMAP_LINEAR;
mag_filter = GL_NEAREST;
break;
case reshadefx::texture_filter::min_point_mag_linear_mip_point:
min_filter = GL_NEAREST_MIPMAP_NEAREST;
mag_filter = GL_LINEAR;
break;
case reshadefx::texture_filter::min_point_mag_mip_linear:
min_filter = GL_NEAREST_MIPMAP_LINEAR;
mag_filter = GL_LINEAR;
break;
case reshadefx::texture_filter::min_linear_mag_mip_point:
min_filter = GL_LINEAR_MIPMAP_NEAREST;
mag_filter = GL_NEAREST;
break;
case reshadefx::texture_filter::min_linear_mag_point_mip_linear:
min_filter = GL_LINEAR_MIPMAP_LINEAR;
mag_filter = GL_NEAREST;
break;
case reshadefx::texture_filter::min_mag_linear_mip_point:
min_filter = GL_LINEAR_MIPMAP_NEAREST;
mag_filter = GL_LINEAR;
break;
case reshadefx::texture_filter::min_mag_mip_linear:
min_filter = GL_LINEAR_MIPMAP_LINEAR;
mag_filter = GL_LINEAR;
break;
}
const auto convert_address_mode = [](reshadefx::texture_address_mode value) {
switch (value)
{
case reshadefx::texture_address_mode::wrap:
return GL_REPEAT;
case reshadefx::texture_address_mode::mirror:
return GL_MIRRORED_REPEAT;
case reshadefx::texture_address_mode::clamp:
return GL_CLAMP_TO_EDGE;
case reshadefx::texture_address_mode::border:
return GL_CLAMP_TO_BORDER;
default:
return GL_NONE;
}
};
GLuint sampler_id = 0;
glGenSamplers(1, &sampler_id);
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_S, convert_address_mode(info.address_u));
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_T, convert_address_mode(info.address_v));
glSamplerParameteri(sampler_id, GL_TEXTURE_WRAP_R, convert_address_mode(info.address_w));
glSamplerParameteri(sampler_id, GL_TEXTURE_MAG_FILTER, mag_filter);
glSamplerParameteri(sampler_id, GL_TEXTURE_MIN_FILTER, min_filter);
glSamplerParameterf(sampler_id, GL_TEXTURE_LOD_BIAS, info.lod_bias);
glSamplerParameterf(sampler_id, GL_TEXTURE_MIN_LOD, info.min_lod);
glSamplerParameterf(sampler_id, GL_TEXTURE_MAX_LOD, info.max_lod);
it = _effect_sampler_states.emplace(hash, sampler_id).first;
}
sampler_data &sampler_data = pass_data.samplers[info.binding];
sampler_data.id = it->second;
sampler_data.texture = static_cast<tex_data *>(texture.impl);
sampler_data.is_srgb_format = info.srgb;
}
}
}
for (auto &it : entry_points)
glDeleteShader(it.second);
return success;
}
void reshade::opengl::runtime_gl::unload_effect(size_t index)
{
for (technique &tech : _techniques)
{
if (tech.effect_index != index)
continue;
const auto impl = static_cast<technique_data *>(tech.impl);
if (impl == nullptr)
continue;
glDeleteQueries(1, &impl->query);
for (pass_data &pass_data : impl->passes)
{
if (pass_data.program)
glDeleteProgram(pass_data.program);
glDeleteFramebuffers(1, &pass_data.fbo);
}
delete impl;
tech.impl = nullptr;
}
runtime::unload_effect(index);
if (index < _effect_ubos.size())
{
glDeleteBuffers(1, &_effect_ubos[index]);
_effect_ubos[index] = 0;
}
}
void reshade::opengl::runtime_gl::unload_effects()
{
for (technique &tech : _techniques)
{
const auto impl = static_cast<technique_data *>(tech.impl);
if (impl == nullptr)
continue;
glDeleteQueries(1, &impl->query);
for (pass_data &pass_data : impl->passes)
{
if (pass_data.program)
glDeleteProgram(pass_data.program);
glDeleteFramebuffers(1, &pass_data.fbo);
}
delete impl;
tech.impl = nullptr;
}
runtime::unload_effects();
glDeleteBuffers(static_cast<GLsizei>(_effect_ubos.size()), _effect_ubos.data());
_effect_ubos.clear();
for (const auto &info : _effect_sampler_states)
glDeleteSamplers(1, &info.second);
_effect_sampler_states.clear();
}
bool reshade::opengl::runtime_gl::init_texture(texture &texture)
{
auto impl = new tex_data();
texture.impl = impl;
if (texture.semantic == "COLOR")
{
impl->id[0] = _tex[TEX_BACK];
impl->id[1] = _tex[TEX_BACK_SRGB];
return true;
}
if (texture.semantic == "DEPTH")
{
#if RESHADE_DEPTH
impl->id[0] = impl->id[1] =
_copy_depth_source ? _tex[TEX_DEPTH] : _depth_source;
#endif
return true;
}
GLenum internal_format = GL_RGBA8;
GLenum internal_format_srgb = GL_NONE;
switch (texture.format)
{
case reshadefx::texture_format::r8:
internal_format = GL_R8;
break;
case reshadefx::texture_format::r16f:
internal_format = GL_R16F;
break;
case reshadefx::texture_format::r32f:
internal_format = GL_R32F;
break;
case reshadefx::texture_format::rg8:
internal_format = GL_RG8;
break;
case reshadefx::texture_format::rg16:
internal_format = GL_RG16;
break;
case reshadefx::texture_format::rg16f:
internal_format = GL_RG16F;
break;
case reshadefx::texture_format::rg32f:
internal_format = GL_RG32F;
break;
case reshadefx::texture_format::rgba8:
internal_format = GL_RGBA8;
internal_format_srgb = GL_SRGB8_ALPHA8;
break;
case reshadefx::texture_format::rgba16:
internal_format = GL_RGBA16;
break;
case reshadefx::texture_format::rgba16f:
internal_format = GL_RGBA16F;
break;
case reshadefx::texture_format::rgba32f:
internal_format = GL_RGBA32F;
break;
case reshadefx::texture_format::rgb10a2:
internal_format = GL_RGB10_A2;
break;
}
impl->levels = texture.levels;
impl->internal_format = internal_format;
// Get current state
GLint previous_tex = 0;
GLint previous_draw_buffer = 0;
GLint previous_frame_buffer = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous_tex);
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &previous_frame_buffer);
glGetIntegerv(GL_DRAW_BUFFER, &previous_draw_buffer);
// Allocate texture storage
glGenTextures(2, impl->id);
glBindTexture(GL_TEXTURE_2D, impl->id[0]);
glTexStorage2D(GL_TEXTURE_2D, texture.levels, internal_format, texture.width, texture.height);
// Only create SRGB texture view if necessary
if (internal_format_srgb != GL_NONE) {
glTextureView(impl->id[1], GL_TEXTURE_2D, impl->id[0], internal_format_srgb, 0, texture.levels, 0, 1);
}
else {
impl->id[1] = impl->id[0];
}
// Set default minification filter to linear (used during mipmap generation)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
// Clear texture to zero since by default its contents are undefined
// Use a separate FBO here to make sure there is no mismatch with the dimensions of others
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, _fbo[FBO_CLEAR]);
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, impl->id[0], 0);
assert(glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
const GLuint clear_color[4] = { 0, 0, 0, 0 };
glClearBufferuiv(GL_COLOR, 0, clear_color);
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 0, 0);
// Restore previous state from application
glBindTexture(GL_TEXTURE_2D, previous_tex);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, previous_frame_buffer);
glDrawBuffer(previous_draw_buffer);
return true;
}
void reshade::opengl::runtime_gl::upload_texture(const texture &texture, const uint8_t *pixels)
{
auto impl = static_cast<tex_data *>(texture.impl);
assert(impl != nullptr && texture.semantic.empty() && pixels != nullptr);
// Get current state
GLint previous_tex = 0;
GLint previous_unpack = 0;
GLint previous_unpack_lsb = GL_FALSE;
GLint previous_unpack_swap = GL_FALSE;
GLint previous_unpack_alignment = 0;
GLint previous_unpack_row_length = 0;
GLint previous_unpack_image_height = 0;
GLint previous_unpack_skip_rows = 0;
GLint previous_unpack_skip_pixels = 0;
GLint previous_unpack_skip_images = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous_tex);
glGetIntegerv(GL_PIXEL_UNPACK_BUFFER_BINDING, &previous_unpack);
glGetIntegerv(GL_UNPACK_LSB_FIRST, &previous_unpack_lsb);
glGetIntegerv(GL_UNPACK_SWAP_BYTES, &previous_unpack_swap);
glGetIntegerv(GL_UNPACK_ALIGNMENT, &previous_unpack_alignment);
glGetIntegerv(GL_UNPACK_ROW_LENGTH, &previous_unpack_row_length);
glGetIntegerv(GL_UNPACK_IMAGE_HEIGHT, &previous_unpack_image_height);
glGetIntegerv(GL_UNPACK_SKIP_ROWS, &previous_unpack_skip_rows);
glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &previous_unpack_skip_pixels);
glGetIntegerv(GL_UNPACK_SKIP_IMAGES, &previous_unpack_skip_images);
// Unset any existing unpack buffer so pointer is not interpreted as an offset
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
// Clear pixel storage modes to defaults (texture uploads can break otherwise)
glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // RGBA data is 4-byte aligned
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
// Bind and upload texture data
glBindTexture(GL_TEXTURE_2D, impl->id[0]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, texture.width, texture.height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
generate_mipmaps(impl);
// Restore previous state from application
glBindTexture(GL_TEXTURE_2D, previous_tex);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, previous_unpack);
glPixelStorei(GL_UNPACK_LSB_FIRST, previous_unpack_lsb);
glPixelStorei(GL_UNPACK_SWAP_BYTES, previous_unpack_swap);
glPixelStorei(GL_UNPACK_ALIGNMENT, previous_unpack_alignment);
glPixelStorei(GL_UNPACK_ROW_LENGTH, previous_unpack_row_length);
glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, previous_unpack_image_height);
glPixelStorei(GL_UNPACK_SKIP_ROWS, previous_unpack_skip_rows);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, previous_unpack_skip_pixels);
glPixelStorei(GL_UNPACK_SKIP_IMAGES, previous_unpack_skip_images);
}
void reshade::opengl::runtime_gl::destroy_texture(texture &texture)
{
if (texture.impl == nullptr)
return;
auto impl = static_cast<tex_data *>(texture.impl);
if (texture.semantic != "COLOR" && texture.semantic != "DEPTH") {
glDeleteTextures(impl->id[0] != impl->id[1] ? 2 : 1, impl->id);
}