Method _renderAscii

src/tools/texture-lab/renderer.js:586–625

(params, inputTexture, width, height, flipY = 1.0, renderScale = 1.0)

  }

  _renderAscii(params, inputTexture, width, height, flipY = 1.0, renderScale = 1.0) {
    const gl = this.gl;
    const program = this.programs.ascii;

    const charset = params.charset || ASCII_PRESETS.STANDARD;
    this._updateCharacterAtlas(charset);

    this._useProgram(program, flipY);

    gl.activeTexture(gl.TEXTURE0);
    gl.bindTexture(gl.TEXTURE_2D, inputTexture);

    gl.activeTexture(gl.TEXTURE1);
    gl.bindTexture(gl.TEXTURE_2D, this.textures.charAtlas);

    // Scale cellSize proportionally to render resolution so export matches preview
    const scaledCellSize = params.cellSize * renderScale;

    const charColor = this._hexToRgb(params.charColor || '#ffffff');
    const bgColorRgb = this._hexToRgb(params.backgroundColor || '#000000');

    gl.uniform1i(program.uniforms.u_image, 0);
    gl.uniform1i(program.uniforms.u_charAtlas, 1);
    gl.uniform1f(program.uniforms.u_cellSize, scaledCellSize);
    gl.uniform1i(program.uniforms.u_color, params.color ? 1 : 0);
    gl.uniform1i(program.uniforms.u_invert, params.invert ? 1 : 0);
    gl.uniform1i(program.uniforms.u_charCount, charset.length);
    gl.uniform2f(program.uniforms.u_resolution, width, height);
    gl.uniform1f(program.uniforms.u_brightness, params.brightness ?? 1.0);
    gl.uniform1f(program.uniforms.u_contrast, params.contrast ?? 1.0);
    gl.uniform1f(program.uniforms.u_gamma, params.gamma ?? 1.0);
    gl.uniform1f(program.uniforms.u_charBrightness, params.charBrightness ?? 1.0);
    gl.uniform3f(program.uniforms.u_charColor, charColor[0], charColor[1], charColor[2]);
    gl.uniform3f(program.uniforms.u_backgroundColor, bgColorRgb[0], bgColorRgb[1], bgColorRgb[2]);
    gl.uniform1f(program.uniforms.u_backgroundBlend, params.backgroundBlend ?? 1.0);
    gl.uniform1f(program.uniforms.u_edgeEnhance, params.edgeEnhance ?? 0.0);
    gl.uniform1f(program.uniforms.u_cellGap, params.cellGap ?? 0.0);

    gl.drawArrays(gl.TRIANGLES, 0, 6);
  }

  _renderOverlay(params, inputTexture, width, height, flipY = 1.0) {
    const gl = this.gl;