1 files changed, 76 insertions, 0 deletions
diff --git a/src/RendererWidget.cpp b/src/RendererWidget.cpp
new file mode 100644
index 0000000..6b732e3
--- /dev/null
+++ b/src/RendererWidget.cpp
@@ -0,0 +1,76 @@
+#include "RendererWidget.hpp"
+
+const GLfloat vertices[] = {
+    0.0f,0.0f,0.0f,    
+    1.0f,1.0f,0.0f,
+    0.0f,1.0f,0.0f,
+
+    0.0f,0.0f,0.0f,
+    1.0f,0.0f,0.0f,
+    1.0f,1.0f,0.0f,
+};
+
+const GLfloat uvs[] = {
+    0.0f,0.0f,
+    1.0f,1.0f,
+    0.0f,1.0f,    
+
+    0.0f,0.0f,    
+    1.0f,0.0f,
+    1.0f,1.0f,
+};
+
+static GLuint VboVertices, VboUvs, Vao;
+static Shader* guiShader = nullptr;
+
+RendererWidget::RendererWidget(RootWidget *widget) {
+    this->tree = widget;
+
+    if (guiShader == nullptr) {
+        guiShader = new Shader("./shaders/gui.vs", "./shaders/gui.fs");
+        guiShader->Use();
+        glUniform1i(glGetUniformLocation(guiShader->Program, "textureAtlas"), 0);        
+        
+        glGenBuffers(1, &VboVertices);
+        glBindBuffer(GL_ARRAY_BUFFER, VboVertices);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+        glGenBuffers(1, &VboUvs);
+        glBindBuffer(GL_ARRAY_BUFFER, VboUvs);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(uvs), uvs, GL_STATIC_DRAW);
+
+        glGenVertexArrays(1, &Vao);
+        glBindVertexArray(Vao);
+        {
+            glBindBuffer(GL_ARRAY_BUFFER, VboVertices);
+            glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0);
+            glEnableVertexAttribArray(0);
+
+            glBindBuffer(GL_ARRAY_BUFFER, VboUvs);
+            glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat), (GLvoid*)0);
+            glEnableVertexAttribArray(1);
+        }
+        glBindVertexArray(0);
+    }
+}
+
+RendererWidget::~RendererWidget() {
+
+}
+
+void RendererWidget::Render(RenderState &state) {
+    state.SetActiveVao(Vao);
+    state.SetActiveShader(guiShader->Program);
+
+    auto toRender = tree->GetRenderList();
+    for (auto& it : toRender) {
+        auto[x, y, w, h] = it->GetTexture();
+        glUniform4f(glGetUniformLocation(guiShader->Program, "widgetTexture"), x, y, w, h);
+
+        glUniform4f(glGetUniformLocation(guiShader->Program, "transform"), it->x, it->y, it->w, it->h);
+
+        glDrawArrays(GL_TRIANGLES, 0, 36);
+    }
+
+    glCheckError();
+}
+\ No newline at end of file