func NewSpriteDrawer(window *glfw.Window, layers int) *SpriteDrawer {
s := new(SpriteDrawer)
vao := gl.GenVertexArray()
vao.Bind()
s.Camera = vec2.Identity
s.Program = CreateProgram("shaders/2d.vert", "shaders/2d.geom", "shaders/texture.frag")
s.Use()
s.camera_uniform = s.GetUniformLocation("camera")
s.Texture = gl.GenTexture()
s.Texture.Bind(gl.TEXTURE_2D_ARRAY)
gl.TexImage3D(gl.TEXTURE_2D_ARRAY, 0, gl.RGBA, 2048, 2048, layers, 0, gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.TexParameteri(gl.TEXTURE_2D_ARRAY, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D_ARRAY, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
s.Window = window
w, h := window.GetSize()
s.OnScreenResize(w, h)
s.Window.SetSizeCallback(func(window *glfw.Window, w, h int) {
s.OnScreenResize(w, h)
})
return s
}
func (t *Texture) Options(filter, clamp int) {
t.Bind()
gl.TexParameteri(t.target, gl.TEXTURE_MIN_FILTER, filter)
gl.TexParameteri(t.target, gl.TEXTURE_MAG_FILTER, filter)
gl.TexParameteri(t.target, gl.TEXTURE_WRAP_S, clamp)
gl.TexParameteri(t.target, gl.TEXTURE_WRAP_T, clamp)
}
func (v *Video) initGL() {
if gl.Init() != 0 {
panic(sdl.GetError())
}
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Enable(gl.CULL_FACE)
gl.Enable(gl.DEPTH_TEST)
v.prog = createProgram(vertShaderSrcDef, fragShaderSrcDef)
posAttrib := v.prog.GetAttribLocation("vPosition")
texCoordAttr := v.prog.GetAttribLocation("vTexCoord")
v.textureUni = v.prog.GetAttribLocation("texture")
v.texture = gl.GenTexture()
gl.ActiveTexture(gl.TEXTURE0)
v.texture.Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
v.prog.Use()
posAttrib.EnableArray()
texCoordAttr.EnableArray()
vertVBO := gl.GenBuffer()
vertVBO.Bind(gl.ARRAY_BUFFER)
verts := []float32{-1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0}
gl.BufferData(gl.ARRAY_BUFFER, len(verts)*int(unsafe.Sizeof(verts[0])), &verts[0], gl.STATIC_DRAW)
textCoorBuf := gl.GenBuffer()
textCoorBuf.Bind(gl.ARRAY_BUFFER)
texVerts := []float32{0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0}
gl.BufferData(gl.ARRAY_BUFFER, len(texVerts)*int(unsafe.Sizeof(texVerts[0])), &texVerts[0], gl.STATIC_DRAW)
posAttrib.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
texCoordAttr.AttribPointer(2, gl.FLOAT, false, 0, uintptr(0))
}
func (this *FrameBuffer) Resize(width, height int) {
//this.Framebuffer.Bind()
// this.RenderTexture := gl.GenTexture()
this.RenderTexture.Bind(gl.TEXTURE_RECTANGLE)
gl.TexImage2D(gl.TEXTURE_RECTANGLE, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.TexParameteri(gl.TEXTURE_RECTANGLE, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_RECTANGLE, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
this.RenderTexture.Unbind(gl.TEXTURE_RECTANGLE)
// depthStencilTexture := gl.GenTexture()
this.DepthTexture.Bind(gl.TEXTURE_RECTANGLE)
gl.TexImage2D(gl.TEXTURE_RECTANGLE, 0, gl.DEPTH24_STENCIL8, width, height, 0, gl.DEPTH_STENCIL, gl.UNSIGNED_INT_24_8, nil)
gl.TexParameteri(gl.TEXTURE_RECTANGLE, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_RECTANGLE, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_RECTANGLE, gl.TEXTURE_WRAP_S, gl.CLAMP)
gl.TexParameteri(gl.TEXTURE_RECTANGLE, gl.TEXTURE_WRAP_T, gl.CLAMP)
this.DepthTexture.Unbind(gl.TEXTURE_RECTANGLE)
}
func NewTextures(heightMap *gamestate.HeightMap) *Textures {
textures := make([]gl.Texture, 10)
gl.GenTextures(textures)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureGround)
textures[1].Bind(gl.TEXTURE_2D)
helpers.LoadTexture2DWatched("textures/GravelCobbleS.jpg")
gl.GenerateMipmap(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureCliffs)
textures[2].Bind(gl.TEXTURE_2D)
helpers.LoadTexture2DWatched("textures/Cliffs0149_18_S.png")
gl.GenerateMipmap(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureColorBand)
textures[3].Bind(gl.TEXTURE_1D)
helpers.LoadTexture1DWatched("textures/gradient.png")
gl.TexParameteri(gl.TEXTURE_1D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_1D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureHeightMap)
textures[4].Bind(gl.TEXTURE_2D)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.R16, heightMap.W, heightMap.H, 0, gl.RED, gl.FLOAT, heightMap.TexturePixels())
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureTree)
textures[5].Bind(gl.TEXTURE_2D)
helpers.LoadTexture2DWatched("textures/palme.png")
gl.GenerateMipmap(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureFireBall)
textures[6].Bind(gl.TEXTURE_2D)
helpers.LoadTexture2DWatched("textures/fireball.png")
gl.GenerateMipmap(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureSkybox)
textures[7].Bind(gl.TEXTURE_CUBE_MAP)
helpers.LoadTextureCubeWatched("textures/Above_The_Sea.jpg")
gl.GenerateMipmap(gl.TEXTURE_CUBE_MAP)
gl.TexParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
//gl.TexParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.Enable(gl.TEXTURE_CUBE_MAP_SEAMLESS)
ttf.Init()
defer ttf.Quit()
font, _ := ttf.OpenFont("fonts/Symbola.ttf", 64)
color := sdl.Color{255, 255, 255, 255}
surface, _ := font.RenderUTF8_Blended("Bla", color)
defer surface.Free()
gl.ActiveTexture(gl.TEXTURE0 + constants.TextureFont)
textures[8].Bind(gl.TEXTURE_2D)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, int(surface.W), int(surface.H), 0, gl.RGBA, gl.UNSIGNED_BYTE, uintptr(surface.Data()))
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.ActiveTexture(gl.TEXTURE0)
return &Textures{textures}
}
func (t *Texture) SetWraping(wrapType WrapType, wrap Wrap) {
t.Bind()
gl.TexParameteri(t.target, gl.GLenum(wrapType), int(wrap))
}
func (t *Texture) SetFiltering(minFilter Filter, magFilter Filter) {
t.Bind()
gl.TexParameteri(t.target, gl.TEXTURE_MAG_FILTER, int(magFilter))
gl.TexParameteri(t.target, gl.TEXTURE_MIN_FILTER, int(minFilter))
}
func (t *Texture) Param(filter, value int) {
t.Bind()
gl.TexParameteri(t.target, gl.GLenum(filter), value)
}