@tolokoban/tgd
Version:
ToloGameDev library for WebGL2
34 lines • 3.85 kB
JavaScript
export function webglTextureCreate(gl) {
const tex = gl.createTexture();
if (!tex)
throw new Error("Unable to create a WebGL Texture!");
return tex;
}
/**
* This is applied to the last binded texture.
*/
export function webglTextureParametersSet(gl, { wrapS, wrapT, wrapR, minFilter, magFilter }) {
if (wrapS)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl[wrapS]);
if (wrapT)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl[wrapT]);
if (wrapR)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl[wrapR]);
if (minFilter)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl[minFilter]);
if (magFilter)
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl[magFilter]);
}
export function webglTextureCreate2DFromArray(gl, data, options) {
const texture = webglTextureCreate(gl);
gl.activeTexture(gl.TEXTURE0 + (options.unit ?? 0));
gl.bindTexture(gl.TEXTURE_2D, texture);
webglTextureParametersSet(gl, options);
const { level = 0, internalFormat = "RGBA8", width, height, format = "RGBA", type = "UNSIGNED_BYTE", offset = 0, } = options;
if (options.flipY)
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, options.flipY);
gl.texImage2D(gl.TEXTURE_2D, level, gl[internalFormat], width, height, 0, gl[format], gl[type], data, offset);
return texture;
}
// @TODO: webglTextureCreateFromImage and webglTextureCreateFomBuffer
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