1. 抽离了LApp的部分内容，以解耦其对Qt的依赖，并且尝试了拓展多渲染后端支持。

2026-06-23 21:06:35 +08:00
parent 77d65014ab
commit d41c009a19
18 changed files with 691 additions and 172 deletions
@@ -0,0 +1,102 @@
+//
+// Created by misaki on 2026/6/23.
+//
+
+#pragma once
+#include "IRenderContext.hpp"
+#include "LAppOpenGL.hpp"
+
+class GLRenderContext final : public IRenderContext {
+public:
+    void Clear(float r, float g, float b, float a) override {
+        glClearColor(r, g, b, a);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    }
+
+    void ClearDepth(float depth) override {
+        LAPP_GL_CLEAR_DEPTH(depth);
+    }
+
+    void SetViewport(int x, int y, int w, int h) override {
+        glViewport(x, y, w, h);
+    }
+
+    uintptr_t CreateShaderProgram() override {
+        return CompileShader();
+    }
+
+    uintptr_t GetShaderProgram() const override {
+        return _programId;
+    }
+
+    void InitializeGLState() override {
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    }
+
+private:
+    GLuint _programId = 0;
+
+    GLuint CompileShader() {
+        if (_programId) return _programId;
+
+#if defined(QT_OPENGL_ES_2) || defined(QT_OPENGL_ES_3) || defined(EMBEDDED_LINUX)
+        const char* vertexShader =
+            "#version 100\n"
+            "attribute vec3 position;\n"
+            "attribute vec2 uv;\n"
+            "varying vec2 vuv;\n"
+            "void main() {\n"
+            "    gl_Position = vec4(position, 1.0);\n"
+            "    vuv = uv;\n"
+            "}\n";
+        const char* fragmentShader =
+            "#version 100\n"
+            "precision mediump float;\n"
+            "varying vec2 vuv;\n"
+            "uniform sampler2D texture;\n"
+            "uniform vec4 baseColor;\n"
+            "void main() {\n"
+            "    gl_FragColor = texture2D(texture, vuv) * baseColor;\n"
+            "}\n";
+#else
+        const char* vertexShader =
+            "#version 120\n"
+            "attribute vec3 position;\n"
+            "attribute vec2 uv;\n"
+            "varying vec2 vuv;\n"
+            "void main(void) {\n"
+            "    gl_Position = vec4(position, 1.0);\n"
+            "    vuv = uv;\n"
+            "}\n";
+        const char* fragmentShader =
+            "#version 120\n"
+            "varying vec2 vuv;\n"
+            "uniform sampler2D texture;\n"
+            "uniform vec4 baseColor;\n"
+            "void main(void) {\n"
+            "    gl_FragColor = texture2D(texture, vuv) * baseColor;\n"
+            "}\n";
+#endif
+
+        GLuint vertId = glCreateShader(GL_VERTEX_SHADER);
+        glShaderSource(vertId, 1, &vertexShader, nullptr);
+        glCompileShader(vertId);
+
+        GLuint fragId = glCreateShader(GL_FRAGMENT_SHADER);
+        glShaderSource(fragId, 1, &fragmentShader, nullptr);
+        glCompileShader(fragId);
+
+        _programId = glCreateProgram();
+        glAttachShader(_programId, vertId);
+        glAttachShader(_programId, fragId);
+        glLinkProgram(_programId);
+        glUseProgram(_programId);
+
+        glDeleteShader(vertId);
+        glDeleteShader(fragId);
+        return _programId;
+    }
+};