#include "fs_debug_geometry_normal.h"
#include "device/dvc_device.h"
#include "device/dvc_uniform_buffer.h"
#include "asset/dvc_texture.h"
#include "shader/dvc_shader_functions.h"
#include "pipe/dvc_render_pipe.h"

using namespace davinci;

const char* DebugFragementShader_GeometryNormal::getName(void) const
{
	return "debug:geometry_normal";
}

bool DebugFragementShader_GeometryNormal::begin(const RenderPipe* pipe, MaterialConstPtr material, const VertexDesc& veretexDesc)
{
	m_pipe = pipe;

	if (const VertexDesc::Element* element = veretexDesc.getElementByType(VET_NORMAL))
	{
		m_vNormalOffset = element->offset / sizeof(float32_t);
	}
	else return false;

	return true;
}

void DebugFragementShader_GeometryNormal::process(const float32_t* pixelData, fVector4& color)
{
	const UniformBuffer& uniformBuffer = m_pipe->getUniformBuffer();

	fVector3 v_normal = *((const fVector3*)(pixelData + m_vNormalOffset));

	fVector3 normalColor = v_normal;
	normalColor.normalise();

	normalColor = normalColor * 0.5f + 0.5f;
	color = fVector4(normalColor, 1);
}

void DebugFragementShader_GeometryNormal::end()
{
}