242 lines
7.2 KiB
C++
242 lines
7.2 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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// OpenGL Backend Documentation
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/*
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1.1 Display settings
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Internal and fullscreen resolution: Since the only internal resolutions allowed
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are also fullscreen resolution allowed by the system there is only need for one
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resolution setting that applies to both the internal resolution and the
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fullscreen resolution. - Apparently no, someone else doesn't agree
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Todo: Make the internal resolution option apply instantly, currently only the
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native and 2x option applies instantly. To do this we need to be able to change
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the reinitialize FramebufferManager:Init() while a game is running.
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1.2 Screenshots
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The screenshots should be taken from the internal representation of the picture
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regardless of what the current window size is. Since AA and wireframe is
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applied together with the picture resizing this rule is not currently applied
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to AA or wireframe pictures, they are instead taken from whatever the window
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size is.
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Todo: Render AA and wireframe to a separate picture used for the screenshot in
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addition to the one for display.
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1.3 AA
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Make AA apply instantly during gameplay if possible
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*/
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#include <memory>
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#include <string>
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#include <vector>
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#include "Common/CommonPaths.h"
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#include "Common/FileSearch.h"
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#include "Common/GL/GLInterfaceBase.h"
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#include "Common/GL/GLUtil.h"
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#include "Common/MsgHandler.h"
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#include "VideoBackends/OGL/BoundingBox.h"
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#include "VideoBackends/OGL/PerfQuery.h"
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#include "VideoBackends/OGL/ProgramShaderCache.h"
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#include "VideoBackends/OGL/Render.h"
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#include "VideoBackends/OGL/SamplerCache.h"
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#include "VideoBackends/OGL/TextureCache.h"
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#include "VideoBackends/OGL/TextureConverter.h"
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#include "VideoBackends/OGL/VertexManager.h"
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#include "VideoBackends/OGL/VideoBackend.h"
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#include "VideoCommon/OnScreenDisplay.h"
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#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/VideoConfig.h"
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namespace OGL
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{
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// Draw messages on top of the screen
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unsigned int VideoBackend::PeekMessages()
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{
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return GLInterface->PeekMessages();
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}
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std::string VideoBackend::GetName() const
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{
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return "OGL";
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}
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std::string VideoBackend::GetDisplayName() const
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{
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if (GLInterface != nullptr && GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGLES3)
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return "OpenGLES";
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else
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return "OpenGL";
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}
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static std::vector<std::string> GetShaders(const std::string& sub_dir = "")
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{
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std::vector<std::string> paths =
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DoFileSearch({".glsl"}, {File::GetUserPath(D_SHADERS_IDX) + sub_dir,
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File::GetSysDirectory() + SHADERS_DIR DIR_SEP + sub_dir});
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std::vector<std::string> result;
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for (std::string path : paths)
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{
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std::string name;
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SplitPath(path, nullptr, &name, nullptr);
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result.push_back(name);
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}
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return result;
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}
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void VideoBackend::InitBackendInfo()
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{
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g_Config.backend_info.api_type = APIType::OpenGL;
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g_Config.backend_info.MaxTextureSize = 16384;
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g_Config.backend_info.bSupportsExclusiveFullscreen = false;
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g_Config.backend_info.bSupportsOversizedViewports = true;
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g_Config.backend_info.bSupportsGeometryShaders = true;
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g_Config.backend_info.bSupports3DVision = false;
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g_Config.backend_info.bSupportsPostProcessing = true;
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g_Config.backend_info.bSupportsSSAA = true;
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g_Config.backend_info.bSupportsReversedDepthRange = true;
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g_Config.backend_info.bSupportsMultithreading = false;
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g_Config.backend_info.bSupportsInternalResolutionFrameDumps = true;
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// Overwritten in Render.cpp later
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g_Config.backend_info.bSupportsDualSourceBlend = true;
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g_Config.backend_info.bSupportsPrimitiveRestart = true;
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g_Config.backend_info.bSupportsPaletteConversion = true;
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g_Config.backend_info.bSupportsClipControl = true;
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g_Config.backend_info.bSupportsDepthClamp = true;
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g_Config.backend_info.Adapters.clear();
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// aamodes - 1 is to stay consistent with D3D (means no AA)
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g_Config.backend_info.AAModes = {1, 2, 4, 8};
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// pp shaders
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g_Config.backend_info.PPShaders = GetShaders("");
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g_Config.backend_info.AnaglyphShaders = GetShaders(ANAGLYPH_DIR DIR_SEP);
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}
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bool VideoBackend::InitializeGLExtensions()
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{
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// Init extension support.
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if (!GLExtensions::Init())
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{
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// OpenGL 2.0 is required for all shader based drawings. There is no way to get this by
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// extensions
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PanicAlert("GPU: OGL ERROR: Does your video card support OpenGL 2.0?");
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return false;
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}
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if (GLExtensions::Version() < 300)
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{
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// integer vertex attributes require a gl3 only function
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PanicAlert("GPU: OGL ERROR: Need OpenGL version 3.\n"
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"GPU: Does your video card support OpenGL 3?");
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return false;
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}
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return true;
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}
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bool VideoBackend::FillBackendInfo()
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{
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// check for the max vertex attributes
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GLint numvertexattribs = 0;
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glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &numvertexattribs);
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if (numvertexattribs < 16)
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{
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PanicAlert("GPU: OGL ERROR: Number of attributes %d not enough.\n"
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"GPU: Does your video card support OpenGL 2.x?",
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numvertexattribs);
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return false;
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}
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// check the max texture width and height
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GLint max_texture_size = 0;
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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
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g_Config.backend_info.MaxTextureSize = static_cast<u32>(max_texture_size);
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if (max_texture_size < 1024)
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{
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PanicAlert("GL_MAX_TEXTURE_SIZE too small at %i - must be at least 1024.", max_texture_size);
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return false;
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}
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glGetIntegerv(GL_MAX_SAMPLES, &g_ogl_config.max_samples);
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if (g_ogl_config.max_samples < 1 || !g_ogl_config.bSupportsMSAA)
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g_ogl_config.max_samples = 1;
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// TODO: Move the remaining fields from the Renderer constructor here.
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return true;
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}
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bool VideoBackend::Initialize(void* window_handle)
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{
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InitBackendInfo();
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InitializeShared();
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InitInterface();
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GLInterface->SetMode(GLInterfaceMode::MODE_DETECT);
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if (!GLInterface->Create(window_handle))
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return false;
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return true;
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}
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// This is called after Initialize() from the Core
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// Run from the graphics thread
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void VideoBackend::Video_Prepare()
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{
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GLInterface->MakeCurrent();
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if (!InitializeGLExtensions() || !FillBackendInfo())
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{
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// TODO: Handle this better. We'll likely end up crashing anyway, but this method doesn't
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// return anything, so we can't inform the caller that startup failed.
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return;
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}
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g_renderer = std::make_unique<Renderer>();
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g_vertex_manager = std::make_unique<VertexManager>();
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g_perf_query = GetPerfQuery();
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ProgramShaderCache::Init();
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g_texture_cache = std::make_unique<TextureCache>();
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g_sampler_cache = std::make_unique<SamplerCache>();
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static_cast<Renderer*>(g_renderer.get())->Init();
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TextureConverter::Init();
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BoundingBox::Init(g_renderer->GetTargetWidth(), g_renderer->GetTargetHeight());
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}
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void VideoBackend::Shutdown()
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{
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GLInterface->Shutdown();
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GLInterface.reset();
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ShutdownShared();
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}
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void VideoBackend::Video_Cleanup()
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{
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// The following calls are NOT Thread Safe
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// And need to be called from the video thread
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CleanupShared();
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static_cast<Renderer*>(g_renderer.get())->Shutdown();
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BoundingBox::Shutdown();
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TextureConverter::Shutdown();
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g_sampler_cache.reset();
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g_texture_cache.reset();
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ProgramShaderCache::Shutdown();
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g_perf_query.reset();
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g_vertex_manager.reset();
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g_renderer.reset();
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GLInterface->ClearCurrent();
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}
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}
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