Add opengl.Context.NewShader

graphicscontext.go

@@ -35,6 +35,7 @@ func newGraphicsContext(c *opengl.Context, screenWidth, screenHeight, screenScal
 	}
 
 	gc := &graphicsContext{
+		glContext:   c,
 		defaultR:    &innerImage{f, nil},
 		screen:      screen,
 		screenScale: screenScale,
@@ -43,6 +44,7 @@ func newGraphicsContext(c *opengl.Context, screenWidth, screenHeight, screenScal
 }
 
 type graphicsContext struct {
+	glContext   *opengl.Context
 	screen      *innerImage
 	defaultR    *innerImage
 	screenScale int
@@ -70,7 +72,7 @@ func (c *graphicsContext) postUpdate() error {
 	options := &DrawImageOptions{
 		GeoM: ScaleGeo(scale, scale),
 	}
-	if err := c.defaultR.drawImage(c.screen, options); err != nil {
+	if err := c.defaultR.drawImage(c.glContext, c.screen, options); err != nil {
 		return err
 	}
 	return nil

image.go

@@ -48,7 +48,7 @@ func (i *innerImage) Fill(clr color.Color) error {
 	return i.framebuffer.Fill(r, g, b, a)
 }
 
-func (i *innerImage) drawImage(img *innerImage, options *DrawImageOptions) error {
+func (i *innerImage) drawImage(c *opengl.Context, img *innerImage, options *DrawImageOptions) error {
 	if options == nil {
 		options = &DrawImageOptions{}
 	}
@@ -66,7 +66,7 @@ func (i *innerImage) drawImage(img *innerImage, options *DrawImageOptions) error
 	clr := options.ColorM
 	w, h := img.size()
 	quads := &textureQuads{parts, w, h}
-	return i.framebuffer.DrawTexture(img.texture, quads, geo, clr)
+	return i.framebuffer.DrawTexture(c, img.texture, quads, geo, clr)
 }
 
 func u(x float64, width int) float32 {
@@ -152,7 +152,7 @@ func (i *Image) DrawImage(image *Image, options *DrawImageOptions) (err error) {
 func (i *Image) drawImage(image *innerImage, option *DrawImageOptions) (err error) {
 	i.pixels = nil
 	i.syncer.Sync(func() {
-		err = i.inner.drawImage(image, option)
+		err = i.inner.drawImage(currentUI.glContext, image, option)
 	})
 	return
 }

internal/graphics/framebuffer.go

@@ -107,11 +107,11 @@ func (f *Framebuffer) Fill(r, g, b, a float64) error {
 	return f.framebuffer.Fill(r, g, b, a)
 }
 
-func (f *Framebuffer) DrawTexture(t *Texture, quads TextureQuads, geo, clr Matrix) error {
+func (f *Framebuffer) DrawTexture(c *opengl.Context, t *Texture, quads TextureQuads, geo, clr Matrix) error {
 	if err := f.setAsViewport(); err != nil {
 		return err
 	}
 	projectionMatrix := f.projectionMatrix()
 	// TODO: Define texture.Draw()
-	return shader.DrawTexture(gl.Texture(t.native), projectionMatrix, quads, geo, clr)
+	return shader.DrawTexture(c, gl.Texture(t.native), projectionMatrix, quads, geo, clr)
 }

internal/graphics/internal/shader/drawtexture.go

@@ -16,6 +16,7 @@ package shader
 
 import (
 	"github.com/go-gl/gl"
+	"github.com/hajimehoshi/ebiten/internal/opengl"
 )
 
 func glMatrix(m [4][4]float64) [16]float32 {
@@ -46,11 +47,11 @@ const size = 10000
 const uint16Size = 2
 const float32Size = 4
 
-func DrawTexture(native gl.Texture, projectionMatrix [4][4]float64, quads TextureQuads, geo Matrix, color Matrix) error {
+func DrawTexture(c *opengl.Context, native gl.Texture, projectionMatrix [4][4]float64, quads TextureQuads, geo Matrix, color Matrix) error {
 	// TODO: Check len(quads) and gl.MAX_ELEMENTS_INDICES?
 	const stride = 4 * 4
 	if !initialized {
-		if err := initialize(); err != nil {
+		if err := initialize(c); err != nil {
 			return err
 		}
 

internal/graphics/internal/shader/program.go

@@ -17,6 +17,7 @@ package shader
 import (
 	"errors"
 	"github.com/go-gl/gl"
+	"github.com/hajimehoshi/ebiten/internal/opengl"
 )
 
 type program struct {
@@ -35,7 +36,7 @@ func (p *program) create() error {
 	}
 
 	for _, shaderId := range p.shaderIds {
-		p.native.AttachShader(shaders[shaderId].native)
+		p.native.AttachShader(gl.Shader(shaders[shaderId].native))
 	}
 	p.native.Link()
 	if p.native.Get(gl.LINK_STATUS) == gl.FALSE {
@@ -44,17 +45,19 @@ func (p *program) create() error {
 	return nil
 }
 
-func initialize() error {
-	for _, shader := range shaders {
-		if err := shader.compile(); err != nil {
-			return err
-		}
+func initialize(c *opengl.Context) error {
+	var err error
+	shaders[shaderVertex].native, err = c.NewShader(c.VertexShader, shaders[shaderVertex].source)
+	if err != nil {
+		return err
 	}
-	defer func() {
-		for _, shader := range shaders {
-			shader.delete()
-		}
-	}()
+	defer shaders[shaderVertex].delete()
+
+	shaders[shaderColorMatrix].native, err = c.NewShader(c.FragmentShader, shaders[shaderColorMatrix].source)
+	if err != nil {
+		return err
+	}
+	defer shaders[shaderColorMatrix].delete()
 
 	return programColorMatrix.create()
 }

internal/graphics/internal/shader/shader.go

@@ -15,15 +15,13 @@
 package shader
 
 import (
-	"errors"
-	"fmt"
 	"github.com/go-gl/gl"
+	"github.com/hajimehoshi/ebiten/internal/opengl"
 )
 
 type shader struct {
-	native     gl.Shader
-	shaderType gl.GLenum
-	source     string
+	native opengl.Shader
+	source string
 }
 
 type shaderId int
@@ -35,7 +33,6 @@ const (
 
 var shaders = map[shaderId]*shader{
 	shaderVertex: {
-		shaderType: gl.VERTEX_SHADER,
 		source: `
 uniform mat4 projection_matrix;
 uniform mat4 modelview_matrix;
@@ -50,7 +47,6 @@ void main(void) {
 `,
 	},
 	shaderColorMatrix: {
-		shaderType: gl.FRAGMENT_SHADER,
 		source: `
 uniform sampler2D texture;
 uniform mat4 color_matrix;
@@ -76,28 +72,6 @@ void main(void) {
 	},
 }
 
-func (s *shader) compile() error {
-	s.native = gl.CreateShader(s.shaderType)
-	if s.native == 0 {
-		return errors.New("glCreateShader failed")
-	}
-
-	s.native.Source(s.source)
-	s.native.Compile()
-
-	if s.native.Get(gl.COMPILE_STATUS) == gl.FALSE {
-		return errors.New(fmt.Sprintf("shader compile failed: %s", s.shaderLog()))
-	}
-	return nil
-}
-
-func (s *shader) shaderLog() string {
-	if s.native.Get(gl.INFO_LOG_LENGTH) == 0 {
-		return ""
-	}
-	return s.native.GetInfoLog()
-}
-
 func (s *shader) delete() {
-	s.native.Delete()
+	gl.Shader(s.native).Delete()
 }

internal/opengl/context.go

@@ -27,10 +27,12 @@ const (
 	filterLinear         = gl.LINEAR
 )
 
-type Context struct {
-	Nearest Filter
-	Linear  Filter
-}
+type ShaderType int
+
+const (
+	shaderTypeVertex   ShaderType = gl.VERTEX_SHADER
+	shaderTypeFragment            = gl.FRAGMENT_SHADER
+)
 
 type Texture gl.Texture
 
@@ -76,10 +78,31 @@ func (f Framebuffer) Delete() {
 	gl.Framebuffer(f).Delete()
 }
 
+type Shader gl.Shader
+
+type Program gl.Program
+
+func (p Program) GetAttribLocation(name string) int {
+	return int(p.GetAttribLocation(name))
+}
+
+func (p Program) GetUniformLocation(name string) int {
+	return int(p.GetUniformLocation(name))
+}
+
+type Context struct {
+	Nearest        Filter
+	Linear         Filter
+	VertexShader   ShaderType
+	FragmentShader ShaderType
+}
+
 func NewContext() *Context {
 	c := &Context{
-		Nearest: filterNearest,
-		Linear:  filterLinear,
+		Nearest:        filterNearest,
+		Linear:         filterLinear,
+		VertexShader:   shaderTypeVertex,
+		FragmentShader: shaderTypeFragment,
 	}
 	c.init()
 	return c
@@ -121,3 +144,39 @@ func (c *Context) NewFramebuffer(texture Texture) (Framebuffer, error) {
 
 	return Framebuffer(f), nil
 }
+
+func (c *Context) NewShader(shaderType ShaderType, source string) (Shader, error) {
+	s := gl.CreateShader(gl.GLenum(shaderType))
+	if s == 0 {
+		println(gl.GetError())
+		return 0, errors.New("glCreateShader failed")
+	}
+
+	s.Source(source)
+	s.Compile()
+
+	if s.Get(gl.COMPILE_STATUS) == gl.FALSE {
+		log := ""
+		if s.Get(gl.INFO_LOG_LENGTH) != 0 {
+			log = s.GetInfoLog()
+		}
+		return 0, errors.New(fmt.Sprintf("shader compile failed: %s", log))
+	}
+	return Shader(s), nil
+}
+
+func (c *Context) NewProgram() (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)
+	}
+	p.native.Link()
+	if p.native.Get(gl.LINK_STATUS) == gl.FALSE {
+		return errors.New("program error")
+	}*/
+	return Program(p), nil
+}