Start work on GL state manager object

src/core/PICA/gpu.cpp

@@ -10,8 +10,9 @@
 
 using namespace Floats;
 
-
-GPU::GPU(Memory& mem) : mem(mem), renderer(*this, regs) {
+// Note: For when we have multiple backends, the GL state manager can stay here and have the constructor for the Vulkan-or-whatever renderer ignore it
+// Thus, our GLStateManager being here does not negatively impact renderer-agnosticness
+GPU::GPU(Memory& mem, GLStateManager& gl) : mem(mem), renderer(*this, gl, regs) {
 	vram = new u8[vramSize];
 	mem.setVRAM(vram); // Give the bus a pointer to our VRAM
 }

src/emulator.cpp

@@ -1,6 +1,6 @@
 #include "emulator.hpp"
 
-Emulator::Emulator() : kernel(cpu, memory, gpu), cpu(memory, kernel), gpu(memory), memory(cpu.getTicksRef()) {
+Emulator::Emulator() : kernel(cpu, memory, gpu), cpu(memory, kernel), gpu(memory, gl), memory(cpu.getTicksRef()) {
 	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS) < 0) {
 		Helpers::panic("Failed to initialize SDL2");
 	}
@@ -326,3 +326,9 @@ bool Emulator::loadELF(std::ifstream& file) {
 	}
 	return true;
 }
+
+// Reset our graphics context and initialize the GPU's graphics context
+void Emulator::initGraphicsContext() {
+	gl.reset(); // TODO (For when we have multiple backends): Only do this if we are using OpenGL
+	gpu.initGraphicsContext();
+}

src/gl_state.cpp

@@ -0,0 +1,16 @@
+#include "gl_state.hpp"
+
+void GLStateManager::resetBlend() {
+	blendEnabled = false;
+	OpenGL::disableBlend();
+}
+
+void GLStateManager::resetDepth() {
+	depthEnabled = false;
+	OpenGL::disableDepth();
+}
+
+void GLStateManager::reset() {
+	resetBlend();
+	resetDepth();
+}