Microsoft DirectX 8.1 (pixel shader versions 1.0, 1.1, 1.2, 1.3, 1.4)

mul

Multiplies the components of two source registers. The result is dest = src0 * src1.

mul dest, src0, src1

Registers

Argument	Description	Registers				Version
Argument	Description	v_n	c_n	t_n	r_n	Version
dest	Destination register				x	1.0
				x	x	1.1, 1.2, 1.3
					x	1.4
src0, src1	Source register	x	x	x	x	1.0, 1.1, 1.2, 1.3
			x		x	1.4 phase 1
		x	x		x	1.4 phase 2

To learn more about registers, see Registers.

Example

This example is for illustration only. The C code accompanying the shader has not been optimized for performance.

// This example combines the texture color and the diffuse color. // The shader is shown below. ps.1.0 // Version instruction tex t0 // Declare texture. mul r0, v0, t0 // Multiply diffuse color with gradient texture. // The following images show the contents of the source registers the // resulting output register. // Where src1 is white, the destination pixel color is the same as the // source pixel color since dest = src * 1.0. // Where src1 is black, the destination is also black. // The pixel colors in the middle of the destination image are a blend // of src0 and src1.

// Additional code loads a texture in texture stage 0.
LPDIRECT3DDEVICE8   m_pd3dDevice;   // Init this device pointer in the application.
LPDIRECT3DTEXTURE8  m_pTexture0;    // Use this variable to hold a pointer to the texture.
TCHAR               strPath[512] = "textureFile.jpg";

D3DUtil_CreateTexture( m_pd3dDevice, strPath, &m_pTexture0, D3DFMT_R5G6B5 );
m_pd3dDevice->SetTexture( 0, m_pTexture0 );