Starting work on a buffer type.

Buffer.cc

@@ -0,0 +1,92 @@
+//
+// Created by kyle on 2023-10-09.
+//
+
+#include <cstring>
+#include "Buffer.h"
+
+namespace kge {
+uint8_t *
+Buffer::Contents()
+{
+	return this->contents;
+}
+
+bool
+Buffer::Append(uint8_t *data, size_t datalen)
+{
+	return false;
+}
+
+bool
+Buffer::Append(uint8_t c)
+{
+	return false;
+}
+
+bool
+Buffer::Insert(size_t index, uint8_t *data, size_t datalen)
+{
+	return false;
+}
+
+bool
+Buffer::Insert(size_t index, uint8_t c)
+{
+	return false;
+}
+
+size_t
+Buffer::Size()
+{
+	return this->length;
+}
+
+void
+Buffer::Resize(size_t newCapacity)
+{
+	if (newCapacity < this->length) {
+		return;
+	}
+
+	uint8_t *newContents = new uint8_t[newCapacity];
+
+	memcpy(newContents, this->contents, this->length);
+	delete this->contents;
+	this->contents = newContents;
+	this->capacity = newCapacity;
+}
+
+size_t
+Buffer::Trim()
+{
+	size_t	projectedCapacity = this->capacity * 2;
+
+	if (projectedCapacity < this->capacity) {
+		this->Resize(projectedCapacity);
+	}
+}
+
+void
+Buffer::Clear()
+{
+	memset(this->contents, 0, this->length);
+	this->length = 0;
+}
+
+void
+Buffer::Reclaim()
+{
+	delete this->contents;
+	this->length = 0;
+	this->capacity = 0;
+}
+
+bool
+Buffer::mustGrow(size_t newLength)
+{
+	return (newLength + this->length) >= this->capacity;
+}
+
+
+} // kge

Buffer.h

@@ -0,0 +1,35 @@
+//
+// Created by kyle on 2023-10-09.
+//
+
+#ifndef KGE_BUFFER_H
+#define KGE_BUFFER_H
+
+#include <cstdint>
+
+
+namespace kge {
+
+class Buffer {
+public:
+	uint8_t	*Contents();
+	bool	 Append(uint8_t *data, size_t datalen);
+	bool	 Append(uint8_t c);
+	bool	 Insert(size_t index, uint8_t *data, size_t datalen);
+	bool	 Insert(size_t index, uint8_t c);
+	size_t	 Size();
+	void	 Resize(size_t newCapacity);
+	size_t	 Trim();
+	void	 Clear();
+	void	 Reclaim();
+private:
+	bool	 mustGrow(size_t newLength);
+
+	uint8_t	*contents;
+	size_t	 length;
+	size_t	 capacity;
+};
+
+} // kge
+
+#endif //KGE_BUFFER_H

CMakeLists.txt

@@ -6,10 +6,25 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 find_package(SDL2 REQUIRED)
 find_package(OpenGL REQUIRED)
-find_package(Freetype REQUIRED)
+find_package(Freetype)
+if (DEFINED FREETYPE_INCLUDE_DIRS)
+	add_definitions(-DIMGUI_ENABLE_FREETYPE)
+	set(FREETYPE_SOURCES
+		ext/imgui/misc/freetype/imgui_freetype.cpp
+		ext/imgui/misc/freetype/imgui_freetype.h)
+endif()
+
+if(MSVC)
+	add_compile_options("/W4" "$<$<CONFIG:RELEASE>:/O2>")
+else()
+	add_compile_options("-Wall" "-Wextra" "-Werror" "$<$<CONFIG:RELEASE>:-O3>")
+	if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+		add_compile_options("-stdlib=libc++")
+	else()
+		# nothing special for gcc at the moment
+	endif()
+endif()
 
-add_compile_options("-Wall" "-Wextra" "-Werror")
-add_definitions(-DIMGUI_ENABLE_FREETYPE)
 
 add_library(imgui STATIC
         # Main Imgui files
@@ -25,25 +40,26 @@ add_library(imgui STATIC
         ext/imgui/backends/imgui_impl_opengl3.cpp
         ext/imgui/backends/imgui_impl_opengl3.h
 
-        ext/imgui/misc/freetype/imgui_freetype.cpp
-        ext/imgui/misc/freetype/imgui_freetype.h)
+	$<IF:$<TARGET_EXISTS:Freetype::Freetype>,${FREETYPE_SOURCES},>)
 add_library(imgui::imgui ALIAS imgui)
 target_link_libraries(imgui
         PUBLIC
         OpenGL::GL
+	$<IF:$<TARGET_EXISTS:Freetype::Freetype>,Freetype::Freetype,>
         $<TARGET_NAME_IF_EXISTS:SDL2::SDL2main>
-        $<IF:$<TARGET_EXISTS:SDL2::SDL2>,SDL2::SDL2,SDL2::SDL2-static>
-        Freetype::Freetype)
+        $<IF:$<TARGET_EXISTS:SDL2::SDL2>,SDL2::SDL2,SDL2::SDL2-static>)
 target_include_directories(imgui PUBLIC
         ext/imgui/
         ext/imgui/backends/
         ext/imgui/misc/freetype
-        ${FREETYPE_INCLUDE_DIRS})
+	$<IF:$<TARGET_EXISTS:Freetype::Freetype>,${FREETYPE_INCLUDE_DIRS},>)
 
 include_directories(ext/ ${SDL2_INCLUDE_DIRS})
 
 add_executable(kge
         kge.cc
-		)
+	Buffer.cc
+	Buffer.h
+)
 target_link_libraries(kge imgui)
 

kge.cc

@@ -21,8 +21,12 @@ static const float fontPixelSizes[] = {16, 10, 12, 14, 18};
 
 
 int
-main()
+main(int argc, char *argv[])
 {
+	// SDL2 requires main have these parameters, but they're not being used
+	// yet.
+	(void)argc;
+	(void)argv;
 	// Should this use the SDL_EVENTS subsystem?
 	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) {
 		std::cerr << "kge: failed to initialize SDL" << std::endl;