From 6137773b77f7beeaa381614eb41db1b78811de17 Mon Sep 17 00:00:00 2001
From: Brett Laptop <tri11paragon@tpgc.me>
Date: Tue, 2 Jan 2024 13:03:51 -0500
Subject: [PATCH] packing and transparency

---
 include/blt/gfx/renderer/batch_2d_renderer.h | 17 ++++++++++++-----
 src/blt/gfx/renderer/batch_2d_renderer.cpp   |  9 ++++++++-
 tests/src/main.cpp                           |  5 ++---
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/include/blt/gfx/renderer/batch_2d_renderer.h b/include/blt/gfx/renderer/batch_2d_renderer.h
index 481d0a8..6ee9ce9 100644
--- a/include/blt/gfx/renderer/batch_2d_renderer.h
+++ b/include/blt/gfx/renderer/batch_2d_renderer.h
@@ -78,14 +78,14 @@ namespace blt::gfx
             
             inline void drawRectangle(std::string_view texture, const rectangle_t& rectangle)
             {
-                const static blt::vec4 empty {0,0,0,0};
-                const static blt::vec4 full {1,1,1,1};
+                const static blt::vec4 empty{0, 0, 0, 0};
+                const static blt::vec4 full{1, 1, 1, 1};
                 complex_rectangles[texture][empty][full].push_back(rectangle);
             }
             
             inline void drawRectangle(const blt::vec4& color, const rectangle_t& rectangle)
             {
-                const static blt::vec4 empty {0,0,0,0};
+                const static blt::vec4 empty{0, 0, 0, 0};
                 complex_rectangles[""][color][empty].push_back(rectangle);
             }
             
@@ -94,11 +94,18 @@ namespace blt::gfx
                 complex_rectangles[draw_info.texture_name][draw_info.color][draw_info.blend].push_back(rectangle);
             }
             
-            void render();
+            template<typename T, typename... P>
+            inline void drawRectangle(const T& render_info, P... p)
+            {
+                drawRectangle(render_info, {p...});
+            }
+            
+            void render(bool transparency = true);
             
             void cleanup();
             
-            [[nodiscard]] inline size_t draw_count(){
+            [[nodiscard]] inline size_t draw_count()
+            {
                 return draw_count_;
             }
     };
diff --git a/src/blt/gfx/renderer/batch_2d_renderer.cpp b/src/blt/gfx/renderer/batch_2d_renderer.cpp
index 0aca933..06ba32b 100644
--- a/src/blt/gfx/renderer/batch_2d_renderer.cpp
+++ b/src/blt/gfx/renderer/batch_2d_renderer.cpp
@@ -61,8 +61,13 @@ namespace blt::gfx
         delete shader;
     }
     
-    void batch_renderer_2d::render()
+    void batch_renderer_2d::render(bool transparency)
     {
+        if (transparency)
+        {
+            glEnable(GL_BLEND);
+            glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        }
         draw_count_ = 0;
         shader->bind();
         square_vao->bind();
@@ -93,5 +98,7 @@ namespace blt::gfx
                 }
             }
         }
+        if (transparency)
+            glDisable(GL_BLEND);
     }
 }
\ No newline at end of file
diff --git a/tests/src/main.cpp b/tests/src/main.cpp
index 4066a1d..e5d4246 100644
--- a/tests/src/main.cpp
+++ b/tests/src/main.cpp
@@ -72,9 +72,8 @@ void update(std::int32_t width, std::int32_t height)
     
     const float w = 120, h = 120, cf = 30, rf = 15, crf = 10;
     
-    renderer_2d.drawRectangle("ibuythat", blt::gfx::rectangle_t(width/2.0, height/2.0, width, height, 90));
-    renderer_2d.drawRectangle("niko", {bx, by, w, h});
-    renderer_2d.drawRectangle({bx / width, ((bx / width) + (bx / height)) / 2.0f, by / height}, {bx + w, by + h, w, h});
+    renderer_2d.drawRectangle("ibuythat", (float)width/2.0f, (float)height/2.0f, (float)width, (float)height, 90.0f);
+    renderer_2d.drawRectangle("niko", bx, by, w, h);
     
     bx += mx * blt::gfx::getFrameDeltaSeconds() * cf;
     by += my * blt::gfx::getFrameDeltaSeconds() * cf;