restructured project to match a more standard cmake setup

src/graphics/renderpass.cpp

@@ -0,0 +1,94 @@
+#include <blah/graphics/renderpass.h>
+#include <blah/core/log.h>
+#include "../internal/graphics_backend.h"
+
+using namespace Blah;
+
+RenderPass::RenderPass()
+{
+	blend = BlendMode::Normal;
+	target = App::backbuffer;
+	mesh = MeshRef();
+	material = MaterialRef();
+	has_viewport = false;
+	has_scissor = false;
+	viewport = Rect();
+	scissor = Rect();
+	index_start = 0;
+	index_count = 0;
+	instance_count = 0;
+	depth = Compare::None;
+	cull = Cull::None;
+}
+
+void RenderPass::perform()
+{
+	BLAH_ASSERT(material, "Trying to draw with an invalid Material");
+	BLAH_ASSERT(material->shader(), "Trying to draw with an invalid Shader");
+	BLAH_ASSERT(mesh, "Trying to draw with an invalid Mesh");
+
+	// copy call
+	RenderPass pass = *this;
+
+	// Validate Backbuffer
+	if (!pass.target)
+	{
+		pass.target = App::backbuffer;
+		Log::warn("Trying to draw with an invalid Target; falling back to Back Buffer");
+	}
+
+	// Validate Index Count
+	int64_t index_count = pass.mesh->index_count();
+	if (pass.index_start + pass.index_count > index_count)
+	{
+		Log::warn(
+			"Trying to draw more indices than exist in the index buffer (%i-%i / %i); trimming extra indices",
+			pass.index_start,
+			pass.index_start + pass.index_count,
+			index_count);
+
+		if (pass.index_start > pass.index_count)
+			return;
+
+		pass.index_count = pass.index_count - pass.index_start;
+	}
+
+	// Validate Instance Count
+	int64_t instance_count = pass.mesh->instance_count();
+	if (pass.instance_count > instance_count)
+	{
+		Log::warn(
+			"Trying to draw more instances than exist in the index buffer (%i / %i); trimming extra instances",
+			pass.instance_count,
+			instance_count);
+
+		pass.instance_count = instance_count;
+	}
+
+	// get the total drawable size
+	Vec2 draw_size;
+	if (!pass.target)
+		draw_size = Vec2(App::draw_width(), App::draw_height());
+	else
+		draw_size = Vec2(pass.target->width(), pass.target->height());
+
+	// Validate Viewport
+	if (!pass.has_viewport)
+	{
+		pass.viewport.x = 0;
+		pass.viewport.y = 0;
+		pass.viewport.w = draw_size.x;
+		pass.viewport.h = draw_size.y;
+	}
+	else
+	{
+		pass.viewport = pass.viewport.overlap_rect(Rect(0, 0, draw_size.x, draw_size.y));
+	}
+
+	// Validate Scissor
+	if (pass.has_scissor)
+		pass.scissor = pass.scissor.overlap_rect(Rect(0, 0, draw_size.x, draw_size.y));
+
+	// perform render
+	GraphicsBackend::render(pass);
+}