DanS
3aee55b49c
Full-node GUI wallet for DragonX cryptocurrency. Built with Dear ImGui, SDL3, and OpenGL3/DX11. Features: - Send/receive shielded and transparent transactions - Autoshield with merged transaction display - Built-in CPU mining (xmrig) - Peer management and network monitoring - Wallet encryption with PIN lock - QR code generation for receive addresses - Transaction history with pagination - Console for direct RPC commands - Cross-platform (Linux, Windows)
419 lines
14 KiB
C++
419 lines
14 KiB
C++
// DragonX Wallet - ImGui Edition
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// Copyright 2024-2026 The Hush Developers
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// Released under the GPLv3
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//
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// Offscreen render-target scroll fade — the ImGui equivalent of CSS mask-image.
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// Renders scrollable content to an offscreen surface, then composites it back
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// as a textured mesh strip with vertex alpha for edge fading.
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// This produces a true per-pixel fade that works with any background
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// (including acrylic/backdrop transparency).
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//
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// Supports both OpenGL (DRAGONX_HAS_GLAD) and DX11 (DRAGONX_USE_DX11).
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#pragma once
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#include "imgui.h"
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#include "imgui_internal.h"
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#include <cstdio>
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// ============================================================================
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// Platform detection
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// ============================================================================
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#if defined(DRAGONX_USE_DX11)
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#include <d3d11.h>
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#define SCROLL_FADE_HAS_OFFSCREEN 1
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#define SCROLL_FADE_DX11 1
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#elif defined(DRAGONX_HAS_GLAD)
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#include <glad/gl.h>
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#include "../../util/logger.h"
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#ifndef GL_FRAMEBUFFER_BINDING
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#define GL_FRAMEBUFFER_BINDING 0x8CA6
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#endif
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#ifndef GL_VIEWPORT
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#define GL_VIEWPORT 0x0BA2
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#endif
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#ifndef GL_SCISSOR_TEST
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#define GL_SCISSOR_TEST 0x0C11
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#endif
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#define SCROLL_FADE_HAS_OFFSCREEN 1
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#define SCROLL_FADE_GL 1
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#endif
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#ifdef SCROLL_FADE_HAS_OFFSCREEN
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namespace dragonx {
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namespace ui {
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namespace effects {
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// ============================================================================
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// ScrollFadeRT — manages an offscreen render target for scroll-fade rendering
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// ============================================================================
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class ScrollFadeRT {
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public:
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ScrollFadeRT() = default;
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~ScrollFadeRT() { destroy(); }
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// Non-copyable
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ScrollFadeRT(const ScrollFadeRT&) = delete;
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ScrollFadeRT& operator=(const ScrollFadeRT&) = delete;
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/// Ensure RT matches the required dimensions. Returns true if ready.
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bool ensure(int w, int h) {
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if (w <= 0 || h <= 0) return false;
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if (isValid() && w == width_ && h == height_) return true;
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return init(w, h);
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}
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void destroy();
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bool isValid() const;
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/// Get the texture as an ImTextureID for compositing.
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ImTextureID textureID() const;
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int width() const { return width_; }
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int height() const { return height_; }
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#ifdef SCROLL_FADE_DX11
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ID3D11RenderTargetView* rtv() const { return rtv_; }
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#endif
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#ifdef SCROLL_FADE_GL
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unsigned int fbo() const { return fbo_; }
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#endif
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private:
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bool init(int w, int h);
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int width_ = 0;
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int height_ = 0;
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#ifdef SCROLL_FADE_DX11
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ID3D11Texture2D* tex_ = nullptr;
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ID3D11RenderTargetView* rtv_ = nullptr;
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ID3D11ShaderResourceView* srv_ = nullptr;
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#endif
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#ifdef SCROLL_FADE_GL
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unsigned int fbo_ = 0;
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unsigned int colorTex_ = 0;
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#endif
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};
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// ============================================================================
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// Implementations
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// ============================================================================
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#ifdef SCROLL_FADE_DX11
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// --- DX11 helpers to get device/context from ImGui backend ---
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inline ID3D11Device* GetDX11Device() {
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ImGuiIO& io = ImGui::GetIO();
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if (!io.BackendRendererUserData) return nullptr;
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return *reinterpret_cast<ID3D11Device**>(io.BackendRendererUserData);
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}
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inline ID3D11DeviceContext* GetDX11Context() {
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ID3D11Device* dev = GetDX11Device();
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if (!dev) return nullptr;
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ID3D11DeviceContext* ctx = nullptr;
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dev->GetImmediateContext(&ctx);
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return ctx; // caller must Release()
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}
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inline bool ScrollFadeRT::init(int w, int h) {
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destroy();
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ID3D11Device* dev = GetDX11Device();
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if (!dev) return false;
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width_ = w;
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height_ = h;
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// Create texture
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D3D11_TEXTURE2D_DESC td = {};
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td.Width = (UINT)w;
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td.Height = (UINT)h;
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td.MipLevels = 1;
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td.ArraySize = 1;
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td.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
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td.SampleDesc.Count = 1;
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td.Usage = D3D11_USAGE_DEFAULT;
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td.BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
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if (FAILED(dev->CreateTexture2D(&td, nullptr, &tex_))) {
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DEBUG_LOGF("ScrollFadeRT: CreateTexture2D failed\n");
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destroy();
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return false;
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}
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// Render target view
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if (FAILED(dev->CreateRenderTargetView(tex_, nullptr, &rtv_))) {
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DEBUG_LOGF("ScrollFadeRT: CreateRenderTargetView failed\n");
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destroy();
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return false;
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}
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// Shader resource view (for sampling as texture)
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if (FAILED(dev->CreateShaderResourceView(tex_, nullptr, &srv_))) {
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DEBUG_LOGF("ScrollFadeRT: CreateShaderResourceView failed\n");
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destroy();
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return false;
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}
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return true;
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}
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inline void ScrollFadeRT::destroy() {
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if (srv_) { srv_->Release(); srv_ = nullptr; }
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if (rtv_) { rtv_->Release(); rtv_ = nullptr; }
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if (tex_) { tex_->Release(); tex_ = nullptr; }
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width_ = height_ = 0;
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}
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inline bool ScrollFadeRT::isValid() const { return rtv_ != nullptr; }
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inline ImTextureID ScrollFadeRT::textureID() const {
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return (ImTextureID)srv_;
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}
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#endif // SCROLL_FADE_DX11
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#ifdef SCROLL_FADE_GL
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inline bool ScrollFadeRT::init(int w, int h) {
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destroy();
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width_ = w;
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height_ = h;
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glGenFramebuffers(1, &fbo_);
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glBindFramebuffer(GL_FRAMEBUFFER, fbo_);
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glGenTextures(1, &colorTex_);
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glBindTexture(GL_TEXTURE_2D, colorTex_);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
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GL_TEXTURE_2D, colorTex_, 0);
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GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glBindTexture(GL_TEXTURE_2D, 0);
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if (status != GL_FRAMEBUFFER_COMPLETE) {
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DEBUG_LOGF("ScrollFadeRT: FBO incomplete (0x%X)\n", status);
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destroy();
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return false;
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}
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return true;
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}
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inline void ScrollFadeRT::destroy() {
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if (colorTex_) { glDeleteTextures(1, &colorTex_); colorTex_ = 0; }
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if (fbo_) { glDeleteFramebuffers(1, &fbo_); fbo_ = 0; }
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width_ = height_ = 0;
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}
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inline bool ScrollFadeRT::isValid() const { return fbo_ != 0; }
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inline ImTextureID ScrollFadeRT::textureID() const {
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return (ImTextureID)(intptr_t)colorTex_;
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}
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#endif // SCROLL_FADE_GL
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// ============================================================================
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// Callback state — singleton storage for bind/unbind data
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// ============================================================================
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struct ScrollFadeState {
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#ifdef SCROLL_FADE_DX11
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ID3D11RenderTargetView* offscreenRTV = nullptr;
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ID3D11RenderTargetView* savedRTV = nullptr;
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ID3D11DepthStencilView* savedDSV = nullptr;
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D3D11_VIEWPORT savedVP = {};
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#endif
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#ifdef SCROLL_FADE_GL
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unsigned int fbo = 0;
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int savedFBO = 0;
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int savedVP[4] = {};
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bool savedScissorEnabled = true; // ImGui always has scissor enabled
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#endif
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int vpW = 0, vpH = 0; // framebuffer pixel dimensions for viewport
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};
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inline ScrollFadeState& GetScrollFadeState() {
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static ScrollFadeState s;
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return s;
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}
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// ============================================================================
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// Callbacks — inserted into the draw list via AddCallback
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// ============================================================================
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#ifdef SCROLL_FADE_DX11
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inline void BindRTCallback(const ImDrawList*, const ImDrawCmd*) {
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auto& st = GetScrollFadeState();
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ID3D11DeviceContext* ctx = GetDX11Context();
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if (!ctx) return;
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// Save current RT and viewport
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UINT numVP = 1;
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ctx->OMGetRenderTargets(1, &st.savedRTV, &st.savedDSV);
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ctx->RSGetViewports(&numVP, &st.savedVP);
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// Bind offscreen RT
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ctx->OMSetRenderTargets(1, &st.offscreenRTV, nullptr);
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// Set viewport to match RT size
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D3D11_VIEWPORT vp = {};
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vp.Width = (FLOAT)st.vpW;
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vp.Height = (FLOAT)st.vpH;
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vp.MaxDepth = 1.0f;
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ctx->RSSetViewports(1, &vp);
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// Clear to transparent
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float clearColor[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
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ctx->ClearRenderTargetView(st.offscreenRTV, clearColor);
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ctx->Release();
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}
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inline void UnbindRTCallback(const ImDrawList*, const ImDrawCmd*) {
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auto& st = GetScrollFadeState();
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ID3D11DeviceContext* ctx = GetDX11Context();
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if (!ctx) return;
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// Restore previous RT and viewport
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ctx->OMSetRenderTargets(1, &st.savedRTV, st.savedDSV);
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ctx->RSSetViewports(1, &st.savedVP);
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// Release the refs from OMGetRenderTargets
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if (st.savedRTV) { st.savedRTV->Release(); st.savedRTV = nullptr; }
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if (st.savedDSV) { st.savedDSV->Release(); st.savedDSV = nullptr; }
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ctx->Release();
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}
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#endif // SCROLL_FADE_DX11
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#ifdef SCROLL_FADE_GL
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inline void BindRTCallback(const ImDrawList*, const ImDrawCmd*) {
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auto& st = GetScrollFadeState();
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// Save current FBO and viewport
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &st.savedFBO);
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glGetIntegerv(GL_VIEWPORT, st.savedVP);
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glBindFramebuffer(GL_FRAMEBUFFER, st.fbo);
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glViewport(0, 0, st.vpW, st.vpH);
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// Disable scissor test inside the FBO. ImGui's renderer computes
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// scissor rects relative to the main framebuffer dimensions — those
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// coordinates would be wrong for our offscreen surface. The child
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// window's content is already bounded by ImGui's layout, and the
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// composite step applies its own clip rect, so skipping scissor
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// in the FBO is safe.
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glDisable(GL_SCISSOR_TEST);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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}
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inline void UnbindRTCallback(const ImDrawList*, const ImDrawCmd*) {
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auto& st = GetScrollFadeState();
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glBindFramebuffer(GL_FRAMEBUFFER, (unsigned int)st.savedFBO);
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glViewport(st.savedVP[0], st.savedVP[1], st.savedVP[2], st.savedVP[3]);
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if (st.savedScissorEnabled)
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glEnable(GL_SCISSOR_TEST);
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}
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#endif // SCROLL_FADE_GL
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// ============================================================================
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// Composite helper — draw the RT texture as a mesh strip with alpha fade
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// ============================================================================
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/// Draw the offscreen texture onto `dl` as a vertical strip with alpha=0 at
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/// the faded edges and alpha=1 in the middle. Produces a true CSS-like
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/// mask-image: linear-gradient() result.
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///
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/// @param logicalW, logicalH Logical display dimensions (DisplaySize) for
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/// UV calculation — NOT the RT pixel dimensions. ImGui screen coords
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/// are in logical units, and the FBO projection maps them 1:1 to the
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/// logical coordinate space, so UVs must divide by logical size.
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inline void CompositeWithFade(ImDrawList* dl,
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ImTextureID texID,
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const ImVec2& screenMin,
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const ImVec2& screenMax,
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int logicalW, int logicalH,
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float fadeTop, float fadeBot,
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bool needTop, bool needBot)
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{
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float left = screenMin.x;
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float right = screenMax.x;
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float y0 = screenMin.y;
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float y1 = screenMin.y + (needTop ? fadeTop : 0.0f);
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float y2 = screenMax.y - (needBot ? fadeBot : 0.0f);
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float y3 = screenMax.y;
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// Clamp in case fade zones overlap
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if (y1 > y2) { float mid = (y0 + y3) * 0.5f; y1 = y2 = mid; }
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// UV coordinates — map screen position (logical) to render target texture.
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// Screen coords are in logical (DisplaySize) space. The FBO projection
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// maps these 1:1, so divide by logical dimensions to get [0,1] UVs.
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float uL = screenMin.x / (float)logicalW;
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float uR = screenMax.x / (float)logicalW;
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#ifdef SCROLL_FADE_GL
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// OpenGL: FBO Y is flipped (ImGui top=0 → GL bottom=0)
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auto uvY = [&](float y) -> float { return 1.0f - y / (float)logicalH; };
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#else
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// DX11: no Y flip (both ImGui and DX11 have (0,0) at top-left)
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auto uvY = [&](float y) -> float { return y / (float)logicalH; };
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#endif
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ImU32 colOpaque = IM_COL32(255, 255, 255, 255);
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ImU32 colClear = IM_COL32(255, 255, 255, 0);
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ImU32 colTop = needTop ? colClear : colOpaque;
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ImU32 colBot = needBot ? colClear : colOpaque;
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dl->PushTextureID(texID);
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dl->PrimReserve(18, 8);
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ImDrawVert* vtx = dl->_VtxWritePtr;
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ImDrawIdx* idx = dl->_IdxWritePtr;
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ImDrawIdx base = (ImDrawIdx)dl->_VtxCurrentIdx;
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vtx[0] = { ImVec2(left, y0), ImVec2(uL, uvY(y0)), colTop };
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vtx[1] = { ImVec2(right, y0), ImVec2(uR, uvY(y0)), colTop };
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vtx[2] = { ImVec2(left, y1), ImVec2(uL, uvY(y1)), colOpaque };
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vtx[3] = { ImVec2(right, y1), ImVec2(uR, uvY(y1)), colOpaque };
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vtx[4] = { ImVec2(left, y2), ImVec2(uL, uvY(y2)), colOpaque };
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vtx[5] = { ImVec2(right, y2), ImVec2(uR, uvY(y2)), colOpaque };
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vtx[6] = { ImVec2(left, y3), ImVec2(uL, uvY(y3)), colBot };
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vtx[7] = { ImVec2(right, y3), ImVec2(uR, uvY(y3)), colBot };
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idx[0] = base+0; idx[1] = base+1; idx[2] = base+3;
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idx[3] = base+0; idx[4] = base+3; idx[5] = base+2;
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idx[6] = base+2; idx[7] = base+3; idx[8] = base+5;
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idx[9] = base+2; idx[10] = base+5; idx[11] = base+4;
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idx[12] = base+4; idx[13] = base+5; idx[14] = base+7;
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idx[15] = base+4; idx[16] = base+7; idx[17] = base+6;
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dl->_VtxWritePtr += 8;
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dl->_IdxWritePtr += 18;
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dl->_VtxCurrentIdx += 8;
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dl->PopTextureID();
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}
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} // namespace effects
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} // namespace ui
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} // namespace dragonx
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#endif // SCROLL_FADE_HAS_OFFSCREEN
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