Golang CreateTexture Examples

Example #1

File: texture.go Project: tanema/amore

// newTexture will return a new generated texture will not data uploaded to it.
func newTexture(width, height int32, mipmaps bool) *Texture {
	new_texture := &Texture{
		textureId: gl.CreateTexture(),
		Width:     width,
		Height:    height,
		wrap:      Wrap{s: WRAP_CLAMP, t: WRAP_CLAMP},
		filter:    newFilter(),
		mipmaps:   mipmaps,
	}

	new_texture.SetFilter(FILTER_NEAREST, FILTER_NEAREST)
	new_texture.SetWrap(WRAP_CLAMP, WRAP_CLAMP)

	if new_texture.mipmaps {
		new_texture.filter.mipmap = states.back().defaultMipmapFilter
		new_texture.SetMipmapSharpness(states.back().defaultMipmapSharpness)
	}

	if new_texture.mipmaps {
		// Auto-generate mipmaps every time the texture is modified, if glGenerateMipmap isn't supported.
		setTexMipMap()
	}

	new_texture.generateVerticies()

	return new_texture
}

Example #2

File: opengl.go Project: tanema/amore

// Set the 'default' texture (id 0) as a repeating white pixel. Otherwise,
// texture2D calls inside a shader would return black when drawing graphics
// primitives, which would create the need to use different "passthrough"
// shaders for untextured primitives vs images.
func createDefaultTexture() {
	gl_state.defaultTexture = gl.CreateTexture()
	bindTexture(gl_state.defaultTexture)

	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)

	pix := []byte{255, 255, 255, 255}
	gl.TexImage2D(gl.TEXTURE_2D, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, gl.Ptr(pix))
}