diff --git a/internal/driver/graphics.go b/internal/driver/graphics.go
index 1f3d9cebf..7c96b4851 100644
--- a/internal/driver/graphics.go
+++ b/internal/driver/graphics.go
@@ -17,7 +17,6 @@ package driver
 import (
 	"errors"
 
-	"github.com/hajimehoshi/ebiten/v2/internal/affine"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphics"
 	"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
 )
@@ -34,6 +33,11 @@ const (
 	InvalidShaderID = 0
 )
 
+type ColorM interface {
+	IsIdentity() bool
+	UnsafeElements() (*[16]float32, *[4]float32)
+}
+
 type Graphics interface {
 	Begin()
 	End()
@@ -58,7 +62,7 @@ type Graphics interface {
 	//
 	//   * float32
 	//   * []float32
-	DrawTriangles(dst ImageID, srcs [graphics.ShaderImageNum]ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shader ShaderID, indexLen int, indexOffset int, mode CompositeMode, colorM affine.ColorM, filter Filter, address Address, dstRegion, srcRegion Region, uniforms []interface{}, evenOdd bool) error
+	DrawTriangles(dst ImageID, srcs [graphics.ShaderImageNum]ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shader ShaderID, indexLen int, indexOffset int, mode CompositeMode, colorM ColorM, filter Filter, address Address, dstRegion, srcRegion Region, uniforms []interface{}, evenOdd bool) error
 }
 
 // GraphicsNotReady represents that the graphics driver is not ready for recovering from the context lost.
diff --git a/internal/graphicsdriver/metal/graphics.go b/internal/graphicsdriver/metal/graphics.go
index d52cccc5f..30071b666 100644
--- a/internal/graphicsdriver/metal/graphics.go
+++ b/internal/graphicsdriver/metal/graphics.go
@@ -24,7 +24,6 @@ import (
 	"strings"
 	"unsafe"
 
-	"github.com/hajimehoshi/ebiten/v2/internal/affine"
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphics"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ca"
@@ -868,7 +867,7 @@ func (g *Graphics) draw(rps mtl.RenderPipelineState, dst *Image, dstRegion drive
 	return nil
 }
 
-func (g *Graphics) DrawTriangles(dstID driver.ImageID, srcIDs [graphics.ShaderImageNum]driver.ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shaderID driver.ShaderID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM affine.ColorM, filter driver.Filter, address driver.Address, dstRegion, srcRegion driver.Region, uniforms []interface{}, evenOdd bool) error {
+func (g *Graphics) DrawTriangles(dstID driver.ImageID, srcIDs [graphics.ShaderImageNum]driver.ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shaderID driver.ShaderID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM driver.ColorM, filter driver.Filter, address driver.Address, dstRegion, srcRegion driver.Region, uniforms []interface{}, evenOdd bool) error {
 	dst := g.images[dstID]
 
 	if dst.screen {
diff --git a/internal/graphicsdriver/opengl/graphics.go b/internal/graphicsdriver/opengl/graphics.go
index f21a32729..88ea8ed53 100644
--- a/internal/graphicsdriver/opengl/graphics.go
+++ b/internal/graphicsdriver/opengl/graphics.go
@@ -17,7 +17,6 @@ package opengl
 import (
 	"fmt"
 
-	"github.com/hajimehoshi/ebiten/v2/internal/affine"
 	"github.com/hajimehoshi/ebiten/v2/internal/driver"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphics"
 	"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
@@ -146,7 +145,7 @@ func (g *Graphics) SetVertices(vertices []float32, indices []uint16) {
 	g.context.elementArrayBufferSubData(indices)
 }
 
-func (g *Graphics) DrawTriangles(dstID driver.ImageID, srcIDs [graphics.ShaderImageNum]driver.ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shaderID driver.ShaderID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM affine.ColorM, filter driver.Filter, address driver.Address, dstRegion, srcRegion driver.Region, uniforms []interface{}, evenOdd bool) error {
+func (g *Graphics) DrawTriangles(dstID driver.ImageID, srcIDs [graphics.ShaderImageNum]driver.ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shaderID driver.ShaderID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM driver.ColorM, filter driver.Filter, address driver.Address, dstRegion, srcRegion driver.Region, uniforms []interface{}, evenOdd bool) error {
 	destination := g.images[dstID]
 
 	g.drawCalled = true