Adding OpenGL support to the Bitmap object

src/Application/Graphics/Bitmap.cc

@@ -1 +1,47 @@
-#include "Bitmap.h"
+#include "Bitmap.h"
+
+namespace yaze {
+namespace Application {
+namespace Graphics {
+
+Bitmap::Bitmap() {}
+
+// Simple helper function to load an image into a OpenGL texture with common
+// settings
+bool Bitmap::LoadBitmapFromROM(unsigned char* texture_data, GLuint* out_texture,
+                               int* out_width, int* out_height) {
+  // Load from file
+  int image_width = 0;
+  int image_height = 0;
+  if (texture_data == NULL) return false;
+
+  // Create a OpenGL texture identifier
+  GLuint image_texture;
+  glGenTextures(1, &image_texture);
+  glBindTexture(GL_TEXTURE_2D, image_texture);
+
+  // Setup filtering parameters for display
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
+                  GL_CLAMP_TO_EDGE);  // This is required on WebGL for non
+                                      // power-of-two textures
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);  // Same
+
+  // Upload pixels into texture
+#if defined(GL_UNPACK_ROW_LENGTH) && !defined(__EMSCRIPTEN__)
+  glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+#endif
+  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image_width, image_height, 0, GL_RGBA,
+               GL_UNSIGNED_BYTE, texture_data);
+
+  *out_texture = image_texture;
+  *out_width = image_width;
+  *out_height = image_height;
+
+  return true;
+}
+
+}  // namespace Graphics
+}  // namespace Application
+}  // namespace yaze

src/Application/Graphics/Bitmap.h

@@ -1,14 +1,22 @@
 #ifndef YAZE_APPLICATION_UTILS_BITMAP_H
 #define YAZE_APPLICATION_UTILS_BITMAP_H
 
+#include "GL/glew.h"
+#include <SDL2/SDL_opengl.h>
+
+#include "Utils/ROM.h"
+
 namespace yaze {
 namespace Application {
-namespace Utils {
+namespace Graphics {
 class Bitmap {
+ public:
+  Bitmap();
 
-  
+  bool LoadBitmapFromROM(unsigned char* texture_data, GLuint* out_texture,
+                         int* out_width, int* out_height);
 };
-}  // namespace Utils
+}  // namespace Graphics
 }  // namespace Application
 }  // namespace yaze
 

src/CMakeLists.txt

@@ -1,6 +1,9 @@
 # SDL libraries --------------------------------------------------------------------------------------------------
 find_package(SDL2 REQUIRED)
 
+find_package(OpenGL REQUIRED)
+find_package(GLEW REQUIRED)
+
 # ImGui library --------------------------------------------------------------------------------------------------
 set(IMGUI_PATH  "Library/imgui")                         # Set where the ImGui files are stored
 file(GLOB IMGUI_SOURCES ${IMGUI_PATH}/*.cpp)             # Compile as static library 
@@ -26,10 +29,10 @@ add_executable(
     Application/Core/Window.cc
     Application/Data/Overworld.cc
     Application/Data/OverworldMap.cc
-    Application/Data/Tile.cc
+    Application/Graphics/Bitmap.cc
+    Application/Graphics/Tile.cc
     Application/Editor/Editor.cc
     Application/Events/Event.cc
-    Application/Graphics/Bitmap.cc
     Application/Utils/Compression.cc
     Application/Utils/ROM.cc
     # GUI libraries 
@@ -47,11 +50,14 @@ target_include_directories(
   yaze PUBLIC
   Library/
   Application/
+  ${SDL2_INCLUDE_DIR}
+  ${GLEW_INCLUDE_DIRS}
 )
 
 target_link_libraries(
   yaze 
   ${SDL2_LIBRARIES} 
+  ${GLEW_LIBRARIES}
   ${OPENGL_LIBRARIES} 
   ImGui
 )