allow lua to create dialog box

1 files changed, 47 insertions, 35 deletions

diff --git a/src/ui.cpp b/src/ui.cpp
index 71cb875..5d8b0cc 100644
--- a/src/ui.cpp
+++ b/src/ui.cpp
@@ -1,56 +1,68 @@
 #include "ui.hpp"
 
-#include "events/render.hpp"
 #include "text.hpp"
 
 #include <SDL2/SDL_opengl.h>
 #include <iostream>
 #include <string>
 
-static NewRenderEvent NRE (0, 0, 0, 0);
 static const unsigned int NRE_TEX_DATA = 0xBBBBBBBB;
-static std::basic_string<TextMeshData> buffer;
 
 void UISystem::configure(entityx::EntityManager&, entityx::EventManager&)
 {
 }
 
+void UISystem::createDialogBox(float x, float y, float w, float h)
+{
+    // Queue for generation in the main thread.
+    m_boxes.emplace_back(0, x, y, w, h);
+}
+
 void UISystem::update(entityx::EntityManager&,
     entityx::EventManager& events,
     entityx::TimeDelta)
 {
-    static bool t = false;
-
-    if (!t) {
-        t = true;
-
-        glGenBuffers(1, &NRE.vbo);
-        glGenTextures(1, &NRE.tex);
-
-        glBindTexture(GL_TEXTURE_2D, NRE.tex);
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &NRE_TEX_DATA);
-
-        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-
-        buffer += { 30, -50, -5, 0, 0, 1 };
-        buffer += { 160, -50, -5, 0, 0, 1 };
-        buffer += { 160, -10, -5, 0, 0, 1 };
-        buffer += { 160, -10, -5, 0, 0, 1 };
-        buffer += { 30, -10, -5, 0, 0, 1 };
-        buffer += { 30, -50, -5, 0, 0, 1 };
-
-        glBindBuffer(GL_ARRAY_BUFFER, NRE.vbo);
-        glBufferData(GL_ARRAY_BUFFER,
-                     buffer.size() * sizeof(TextMeshData), buffer.data(),
-                     GL_DYNAMIC_DRAW);
-
-        NRE.normal = 0;
-        NRE.vertex = buffer.size();
-        events.emit<NewRenderEvent>(NRE);
+    for (auto& b : m_boxes) {
+        if (b.vbo == 0) {
+            auto nre = generateDialogBox(b);
+            events.emit<NewRenderEvent>(nre);
+        }
     }
 }
 
+NewRenderEvent UISystem::generateDialogBox(Box& box)
+{
+    NewRenderEvent nre;
+    std::basic_string<TextMeshData> buffer;
+
+    glGenBuffers(1, &nre.vbo);
+    glGenTextures(1, &nre.tex);
+    box.vbo = nre.vbo;
+
+    glBindTexture(GL_TEXTURE_2D, nre.tex);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_RGBA,
+                 GL_UNSIGNED_BYTE, &NRE_TEX_DATA);
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+    buffer += { box.x, box.y, -5, 0, 0, 1 };
+    buffer += { box.x + box.w, box.y, -5, 0, 0, 1 };
+    buffer += { box.x + box.w, box.y + box.h, -5, 0, 0, 1 };
+    buffer += { box.x + box.w, box.y + box.h, -5, 0, 0, 1 };
+    buffer += { box.x, box.y + box.h, -5, 0, 0, 1 };
+    buffer += { box.x, box.y, -5, 0, 0, 1 };
+
+    glBindBuffer(GL_ARRAY_BUFFER, nre.vbo);
+    glBufferData(GL_ARRAY_BUFFER,
+                 buffer.size() * sizeof(TextMeshData), buffer.data(),
+                 GL_DYNAMIC_DRAW);
+
+    nre.normal = 0;
+    nre.vertex = buffer.size();
+    return nre;
+}
+