renderer_opengl: Address buffer overflow

src/citra_qt/bootmanager.cpp

@@ -122,10 +122,8 @@ public:
         QSurfaceFormat format;
 
         if (Settings::values.graphics_api == Settings::GraphicsAPI::OpenGLES) {
-            QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
             format.setVersion(3, 2);
         } else {
-            QCoreApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
             format.setVersion(4, 4);
             format.setProfile(QSurfaceFormat::CoreProfile);
         }

src/video_core/renderer_opengl/gl_shader_gen.cpp

@@ -76,7 +76,7 @@ static std::string GetVertexInterfaceDeclaration(bool is_output, bool separable_
 
     const auto append_variable = [&](std::string_view var, int location) {
         if (separable_shader) {
-            out += fmt::format("layout (location={}) ", location);
+            out += fmt::format("layout(location = {}) ", location);
         }
         out += fmt::format("{}{};\n", is_output ? "out " : "in ", var);
     };
@@ -1240,7 +1240,7 @@ ShaderDecompiler::ProgramResult GenerateFragmentShader(const PicaFSConfig& confi
 in vec4 gl_FragCoord;
 #endif // CITRA_GLES
 
-out vec4 color;
+layout (location = 0) out vec4 color;
 
 uniform sampler2D tex0;
 uniform sampler2D tex1;

src/video_core/renderer_opengl/gl_shader_manager.cpp

@@ -453,6 +453,7 @@ void ShaderProgramManager::ApplyTo(OpenGLState& state) {
         glUseProgramStages(impl->pipeline.handle, GL_VERTEX_SHADER_BIT, impl->current.vs);
         glUseProgramStages(impl->pipeline.handle, GL_GEOMETRY_SHADER_BIT, impl->current.gs);
         glUseProgramStages(impl->pipeline.handle, GL_FRAGMENT_SHADER_BIT, impl->current.fs);
+
         state.draw.shader_program = 0;
         state.draw.program_pipeline = impl->pipeline.handle;
     } else {

src/video_core/renderer_opengl/gl_texture_runtime.cpp

@@ -68,6 +68,7 @@ const StagingBuffer& TextureRuntime::FindStaging(u32 size, bool upload) {
     // Attempt to find a free buffer that fits the requested data
     for (auto it = search.lower_bound({.size = size}); it != search.end(); it++) {
         if (!upload || it->IsFree()) {
+            it->mapped = std::span{it->mapped.data(), size};
             return *it;
         }
     }
@@ -132,6 +133,7 @@ void TextureRuntime::FormatConvert(const Surface& surface,  bool upload,
     } else if (format == VideoCore::PixelFormat::RGB8 && driver.IsOpenGLES()) {
         Pica::Texture::ConvertBGRToRGB(source, dest);
     } else {
+        ASSERT(dest.size() >= source.size());
         std::memcpy(dest.data(), source.data(), source.size());
     }
 }
@@ -311,18 +313,22 @@ void TextureRuntime::BindFramebuffer(GLenum target, GLint level, GLenum textarge
 
 Surface::Surface(VideoCore::SurfaceParams& params, TextureRuntime& runtime)
     : VideoCore::SurfaceBase<Surface>{params}, runtime{runtime}, driver{runtime.GetDriver()} {
-    texture = runtime.Allocate(GetScaledWidth(), GetScaledHeight(), params.pixel_format, texture_type);
+    if (pixel_format != VideoCore::PixelFormat::Invalid) {
+        texture = runtime.Allocate(GetScaledWidth(), GetScaledHeight(), params.pixel_format, texture_type);
+    }
 }
 
 Surface::~Surface() {
-    const VideoCore::HostTextureTag tag = {
-        .format = pixel_format,
-        .width = GetScaledWidth(),
-        .height = GetScaledHeight(),
-        .layers = texture_type == VideoCore::TextureType::CubeMap ? 6u : 1u
-    };
+    if (pixel_format != VideoCore::PixelFormat::Invalid) {
+        const VideoCore::HostTextureTag tag = {
+            .format = pixel_format,
+            .width = GetScaledWidth(),
+            .height = GetScaledHeight(),
+            .layers = texture_type == VideoCore::TextureType::CubeMap ? 6u : 1u
+        };
 
-    runtime.texture_recycler.emplace(tag, std::move(texture));
+        runtime.texture_recycler.emplace(tag, std::move(texture));
+    }
 }
 
 MICROPROFILE_DEFINE(OpenGL_Upload, "OpenGLSurface", "Texture Upload", MP_RGB(128, 192, 64));

src/video_core/renderer_opengl/gl_texture_runtime.h

@@ -22,7 +22,7 @@ struct FormatTuple {
 struct StagingBuffer {
     OGLBuffer buffer{};
     mutable OGLSync buffer_lock{};
-    std::span<std::byte> mapped{};
+    mutable std::span<std::byte> mapped{};
     u32 size{};
 
     bool operator<(const StagingBuffer& other) const {