#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"

using namespace davinci;

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

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

	if (!(material->getParam("u_textureInfo", m_textureInfo)))
	{
		return false;
	}

	if (const VertexDesc::Element* element = veretexDesc.getElementByType(static_cast<VertexElementType>(VET_TEXCOORD_0+m_textureInfo.texCoord)))
	{
		m_vTextureCoordinateOffset = element->offset / sizeof(float32_t);
	}
	else return false;

	return true;
}

void DebugFragementShader_ShowTexture::process(const float32_t* pixelData, fVector4& color)
{
	const fVector2* v_TextureCoordinate = (const fVector2*)(pixelData + m_vTextureCoordinateOffset);

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

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