#include "fs_debug_show_texture.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"

const char* DebugFragementShader_ShowTexture::getName(void) const
{
	return "debug:show_texture";
}

void DebugFragementShader_ShowTexture::begin(const davinci::RenderPipe* pipe, davinci::MaterialConstPtr material)
{
	m_pipe = pipe;
	m_material = material;

	material->getParam("u_textureInfo", m_textureInfo);
}

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

	const davinci::VertexDesc::Element* v_uv_Element = veretexDesc.getElement("v_uv");
	const davinci::fVector2* v_uv = (const davinci::fVector2*)(pixelData + (v_uv_Element->offset / sizeof(float32_t)));

	davinci::fVector4 textureColor = davinci::shader::texture2D(*m_pipe, 
		m_textureInfo, (*v_uv), davinci::fVector4::WHITE);

	color = textureColor;
}
void DebugFragementShader_ShowTexture::end()
{
	m_material.reset();
	m_textureInfo.texture.reset();
}