Add opengl.UniformLocation

internal/graphics/internal/shader/program.go

@@ -15,35 +15,11 @@
 package shader
 
 import (
-	"errors"
 	"github.com/go-gl/gl"
 	"github.com/hajimehoshi/ebiten/internal/opengl"
 )
 
-type program struct {
-	native    gl.Program
-	shaderIds []shaderId
-}
-
-var programColorMatrix = program{
-	shaderIds: []shaderId{shaderVertex, shaderColorMatrix},
-}
-
-func (p *program) create() error {
-	p.native = gl.CreateProgram()
-	if p.native == 0 {
-		return errors.New("glCreateProgram failed")
-	}
-
-	for _, shaderId := range p.shaderIds {
-		p.native.AttachShader(gl.Shader(shaders[shaderId].native))
-	}
-	p.native.Link()
-	if p.native.Get(gl.LINK_STATUS) == gl.FALSE {
-		return errors.New("program error")
-	}
-	return nil
-}
+var programColorMatrix opengl.Program
 
 func initialize(c *opengl.Context) error {
 	var err error
@@ -51,36 +27,37 @@ func initialize(c *opengl.Context) error {
 	if err != nil {
 		return err
 	}
-	defer shaders[shaderVertex].delete()
+	defer shaders[shaderVertex].native.Delete()
 
 	shaders[shaderColorMatrix].native, err = c.NewShader(c.FragmentShader, shaders[shaderColorMatrix].source)
 	if err != nil {
 		return err
 	}
-	defer shaders[shaderColorMatrix].delete()
+	defer shaders[shaderColorMatrix].native.Delete()
 
-	return programColorMatrix.create()
+	shaders := []opengl.Shader{
+		shaders[shaderVertex].native,
+		shaders[shaderColorMatrix].native,
+	}
+	programColorMatrix, err = c.NewProgram(shaders)
+	return err
 }
 
 func getAttributeLocation(program gl.Program, name string) gl.AttribLocation {
 	return program.GetAttribLocation(name)
 }
 
-func getUniformLocation(program gl.Program, name string) gl.UniformLocation {
-	return program.GetUniformLocation(name)
-}
-
-var lastProgram gl.Program = 0
+var lastProgram opengl.Program = 0
 
 func useProgramColorMatrix(projectionMatrix [16]float32, geo Matrix, color Matrix) gl.Program {
-	if lastProgram != programColorMatrix.native {
-		programColorMatrix.native.Use()
-		lastProgram = programColorMatrix.native
+	if lastProgram != programColorMatrix {
+		programColorMatrix.Use()
+		lastProgram = programColorMatrix
 	}
 	// TODO: Check the performance.
 	program := programColorMatrix
 
-	getUniformLocation(program.native, "projection_matrix").UniformMatrix4fv(false, projectionMatrix)
+	program.GetUniformLocation("projection_matrix").UniformMatrix4fv(projectionMatrix)
 
 	a := float32(geo.Element(0, 0))
 	b := float32(geo.Element(0, 1))
@@ -94,9 +71,9 @@ func useProgramColorMatrix(projectionMatrix [16]float32, geo Matrix, color Matri
 		0, 0, 1, 0,
 		tx, ty, 0, 1,
 	}
-	getUniformLocation(program.native, "modelview_matrix").UniformMatrix4fv(false, glModelviewMatrix)
+	program.GetUniformLocation("modelview_matrix").UniformMatrix4fv(glModelviewMatrix)
 
-	getUniformLocation(program.native, "texture").Uniform1i(0)
+	program.GetUniformLocation("texture").Uniform1i(0)
 
 	e := [4][5]float32{}
 	for i := 0; i < 4; i++ {
@@ -111,11 +88,11 @@ func useProgramColorMatrix(projectionMatrix [16]float32, geo Matrix, color Matri
 		e[0][2], e[1][2], e[2][2], e[3][2],
 		e[0][3], e[1][3], e[2][3], e[3][3],
 	}
-	getUniformLocation(program.native, "color_matrix").UniformMatrix4fv(false, glColorMatrix)
+	program.GetUniformLocation("color_matrix").UniformMatrix4fv(glColorMatrix)
 	glColorMatrixTranslation := [...]float32{
 		e[0][4], e[1][4], e[2][4], e[3][4],
 	}
-	getUniformLocation(program.native, "color_matrix_translation").Uniform4fv(1, glColorMatrixTranslation[:])
+	program.GetUniformLocation("color_matrix_translation").Uniform4fv(1, glColorMatrixTranslation[:])
 
-	return program.native
+	return gl.Program(program)
 }

internal/graphics/internal/shader/shader.go

@@ -15,7 +15,6 @@
 package shader
 
 import (
-	"github.com/go-gl/gl"
 	"github.com/hajimehoshi/ebiten/internal/opengl"
 )
 
@@ -71,7 +70,3 @@ void main(void) {
 `,
 	},
 }
-
-func (s *shader) delete() {
-	gl.Shader(s.native).Delete()
-}

internal/opengl/context.go

@@ -80,14 +80,38 @@ func (f Framebuffer) Delete() {
 
 type Shader gl.Shader
 
-type Program gl.Program
-
-func (p Program) GetAttribLocation(name string) int {
-	return int(p.GetAttribLocation(name))
+func (s Shader) Delete() {
+	gl.Shader(s).Delete()
 }
 
-func (p Program) GetUniformLocation(name string) int {
-	return int(p.GetUniformLocation(name))
+type Program gl.Program
+
+func (p Program) Use() {
+	gl.Program(p).Use()
+}
+
+func (p Program) GetAttribLocation(name string) AttribLocation {
+	return AttribLocation(gl.Program(p).GetAttribLocation(name))
+}
+
+func (p Program) GetUniformLocation(name string) UniformLocation {
+	return UniformLocation(gl.Program(p).GetUniformLocation(name))
+}
+
+type AttribLocation int
+
+type UniformLocation int
+
+func (u UniformLocation) UniformMatrix4fv(matrix [16]float32) {
+	gl.UniformLocation(u).UniformMatrix4fv(false, matrix)
+}
+
+func (u UniformLocation) Uniform4fv(count int, v []float32) {
+	gl.UniformLocation(u).Uniform4fv(count, v)
+}
+
+func (u UniformLocation) Uniform1i(v int) {
+	gl.UniformLocation(u).Uniform1i(v)
 }
 
 type Context struct {
@@ -165,18 +189,18 @@ func (c *Context) NewShader(shaderType ShaderType, source string) (Shader, error
 	return Shader(s), nil
 }
 
-func (c *Context) NewProgram() (Program, error) {
+func (c *Context) NewProgram(shaders []Shader) (Program, error) {
 	p := gl.CreateProgram()
 	if p == 0 {
 		return 0, errors.New("glCreateProgram failed")
 	}
 
-	/*for _, shaderId := range p.shaderIds {
-		p.native.AttachShader(shaders[shaderId].native)
+	for _, shader := range shaders {
+		p.AttachShader(gl.Shader(shader))
+	}
+	p.Link()
+	if p.Get(gl.LINK_STATUS) == gl.FALSE {
+		return 0, errors.New("program error")
 	}
-	p.native.Link()
-	if p.native.Get(gl.LINK_STATUS) == gl.FALSE {
-		return errors.New("program error")
-	}*/
 	return Program(p), nil
 }