Added new deemphasis mode + new image widget

core/src/gui/widgets/image.cpp

@@ -0,0 +1,66 @@
+#include <gui/widgets/image.h>
+
+namespace ImGui {
+    ImageDisplay::ImageDisplay(int width, int height, GLenum format) {
+        _width = width;
+        _height = height;
+        _format = format;
+        buffer = malloc(_width * _height * 4);
+        activeBuffer = malloc(_width * _height * 4);
+        memset(buffer, 0, _width * _height * 4);
+        memset(activeBuffer, 0, _width * _height * 4);
+
+        glGenTextures(1, &textureId);
+    }
+
+    ImageDisplay::~ImageDisplay() {
+        free(buffer);
+        free(activeBuffer);
+    }
+
+    void ImageDisplay::draw(const ImVec2& size_arg) {
+        std::lock_guard<std::mutex> lck(bufferMtx);
+
+        ImGuiWindow* window = GetCurrentWindow();
+        ImGuiStyle& style = GetStyle();
+        float pad = style.FramePadding.y;
+        ImVec2 min = window->DC.CursorPos;
+
+        // Calculate scale
+        float width = CalcItemWidth();
+        float height = roundf((width / (float)_width) * (float)_height);
+
+        ImVec2 size = CalcItemSize(size_arg, CalcItemWidth(), height);
+        ImRect bb(min, ImVec2(min.x+size.x, min.y+size.y));
+        float lineHeight = size.y;
+
+        ItemSize(size, style.FramePadding.y);
+        if (!ItemAdd(bb, 0)) {
+            return;
+        }
+
+        if (newData) {
+            newData = false;
+            updateTexture();
+        }
+        
+        window->DrawList->AddImage((void*)(intptr_t)textureId, min, ImVec2(min.x + width, min.y + height));
+    }
+
+    void ImageDisplay::swap() {
+        std::lock_guard<std::mutex> lck(bufferMtx);
+        void* tmp = activeBuffer;
+        activeBuffer = buffer;
+        buffer = tmp;
+        newData = true;
+        memset(buffer, 0, _width * _height * 4);
+    }
+
+    void ImageDisplay::updateTexture() {
+        glBindTexture(GL_TEXTURE_2D, textureId);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, _width, _height, 0, GL_RGBA, GL_UNSIGNED_BYTE, activeBuffer);
+    }
+}

core/src/gui/widgets/image.h

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <imgui.h>
+#include <imgui_internal.h>
+#include <dsp/stream.h>
+#include <mutex>
+#include <GL/glew.h>
+
+namespace ImGui {
+    class ImageDisplay {
+    public:
+        ImageDisplay(int width, int height, GLenum format);
+        ~ImageDisplay();
+        void draw(const ImVec2& size_arg = ImVec2(0, 0));
+        void swap();
+
+        void* buffer;
+
+    private:
+        void updateTexture();
+
+        std::mutex bufferMtx;
+        void* activeBuffer;
+
+        int _width;
+        int _height;
+        GLenum _format;
+
+        GLuint textureId;
+
+        bool newData = false;
+
+    };
+}