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/*
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
*/
function testTexLinear(gl, extensionName, internalFormatWebgl2, pixelType) {
var wtu = WebGLTestUtils;
// Before the extension is enabled
var extensionEnabled = false;
runTestSuite(extensionEnabled);
if (!gl.getExtension(extensionName))
testPassed("No " + extensionName + " support -- this is legal");
else {
// After the extension is enabled
extensionEnabled = true;
runTestSuite(extensionEnabled);
}
function runTestSuite(extensionEnabled)
{
var magF = [gl.NEAREST, gl.LINEAR];
var minF = [gl.NEAREST, gl.LINEAR, gl.NEAREST_MIPMAP_NEAREST, gl.NEAREST_MIPMAP_LINEAR, gl.LINEAR_MIPMAP_NEAREST, gl.LINEAR_MIPMAP_LINEAR];
var tex2DFShader = [
'uniform sampler2D tex;',
'void main() {',
' gl_FragData[0] = texture2D(tex, vec2(0.5, 0.5)) * vec4(4.0, 2.0, 2.0, 1);',
'}'].join('\n');
var positionVertexShader = [
'attribute vec4 vPosition;',
'void main() {',
' gl_Position = vPosition;',
'}'].join('\n');
var texCubeFShader = [
'uniform samplerCube tex;',
'void main() {',
' gl_FragColor = textureCube(tex, normalize(vec3(0.5, 0.5, 1))) * vec4(4.0, 2.0, 2.0, 1);',
'}'].join('\n');
var vs = wtu.loadShader(gl, positionVertexShader, gl.VERTEX_SHADER);
var fs_2d = wtu.loadShader(gl, tex2DFShader, gl.FRAGMENT_SHADER);
var fs_cube = wtu.loadShader(gl, texCubeFShader, gl.FRAGMENT_SHADER);
// TEXTURE_2D
var program = wtu.setupProgram(gl, [vs, fs_2d]);
gl.useProgram(program);
wtu.setupUnitQuad(gl);
for (var kk = 0; kk < 2; ++kk) {
for (var ii = 0; ii < 6; ++ii) {
var linear = false;
if (magF[kk] == gl.LINEAR || (minF[ii] != gl.NEAREST && minF[ii] != gl.NEAREST_MIPMAP_NEAREST))
linear = true;
var color = (!extensionEnabled && linear) ? [0, 0, 0, 255] : [255, 255, 255, 255];
runEachTest(gl.TEXTURE_2D, magF[kk], minF[ii], linear, extensionEnabled, color);
}
}
// TEXTURE_CUBE_MAP
var programCube = wtu.setupProgram(gl, [vs, fs_cube]);
gl.useProgram(programCube);
wtu.setupUnitQuad(gl);
for (var kk = 0; kk < 2; ++kk) {
for (var ii = 0; ii < 6; ++ii) {
var linear = false;
if (magF[kk] == gl.LINEAR || (minF[ii] != gl.NEAREST && minF[ii] != gl.NEAREST_MIPMAP_NEAREST))
linear = true;
var color = (!extensionEnabled && linear) ? [0, 0, 0, 255] : [255, 255, 255, 255];
runEachTest(gl.TEXTURE_CUBE_MAP, magF[kk], minF[ii], linear, extensionEnabled, color);
}
}
}
function runEachTest(textureTarget, magFilter, minFilter, linear, extensionEnabled, expected)
{
const format = gl.RGBA;
let internalFormat = format;
if (wtu.isWebGL2(gl)) {
internalFormat = gl[internalFormatWebgl2];
}
var numberOfChannels = 4;
debug("");
debug("testing target: " + wtu.glEnumToString(gl,textureTarget) +
", testing format: " + wtu.glEnumToString(gl, format) +
", magFilter is: " + wtu.glEnumToString(gl, magFilter) +
", minFilter is: " + wtu.glEnumToString(gl, minFilter) +
", " + extensionName + " is " + (extensionEnabled ? "enabled": "not enabled")
);
// Generate data.
var width = 4;
var height = 4;
var canvas2d = document.createElement('canvas');
canvas2d.width = width;
canvas2d.height = height;
var ctx2d = canvas2d.getContext('2d');
var color = [64, 128, 128, 255];
ctx2d.fillStyle = "rgba(" + color[0] + "," + color[1] + "," + color[2] + "," + color[3] + ")";
ctx2d.fillRect(0, 0, width, height);
var texture = gl.createTexture();
gl.bindTexture(textureTarget, texture);
gl.texParameteri(textureTarget, gl.TEXTURE_MAG_FILTER, magFilter);
gl.texParameteri(textureTarget, gl.TEXTURE_MIN_FILTER, minFilter);
gl.texParameteri(textureTarget, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(textureTarget, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
if (textureTarget == gl.TEXTURE_2D) {
gl.texImage2D(gl.TEXTURE_2D, 0, internalFormat, format, gl[pixelType], canvas2d);
if (minFilter != gl.NEAREST && minFilter != gl.LINEAR) {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors during texture setup");
gl.generateMipmap(gl.TEXTURE_2D);
if (gl.getError() != gl.NO_ERROR) {
debug("generateMipmap failed for floating-point TEXTURE_2D -- this is legal -- skipping the rest of this test");
return;
}
}
} else if (textureTarget == gl.TEXTURE_CUBE_MAP) {
var targets = [
gl.TEXTURE_CUBE_MAP_POSITIVE_X,
gl.TEXTURE_CUBE_MAP_NEGATIVE_X,
gl.TEXTURE_CUBE_MAP_POSITIVE_Y,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
gl.TEXTURE_CUBE_MAP_POSITIVE_Z,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Z];
for (var tt = 0; tt < targets.length; ++tt)
gl.texImage2D(targets[tt], 0, internalFormat, format, gl[pixelType], canvas2d);
if (minFilter != gl.NEAREST && minFilter != gl.LINEAR) {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors during texture setup");
gl.generateMipmap(gl.TEXTURE_CUBE_MAP);
if (gl.getError() != gl.NO_ERROR) {
debug("generateMipmap failed for floating-point TEXTURE_CUBE_MAP -- this is legal -- skipping the rest of this test");
return;
}
}
}
wtu.clearAndDrawUnitQuad(gl);
if (!linear) {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, pixelType + " texture with non-Linear filter should succeed with NO_ERROR no matter whether " + extensionName + " is enabled or not");
} else if (!extensionEnabled) {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, pixelType + " texture with Linear filter should produce [0, 0, 0, 1.0] with NO_ERROR if " + extensionName + " isn't enabled");
} else {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, pixelType + " texture with Linear filter should succeed with NO_ERROR if " + extensionName + " is enabled");
}
wtu.checkCanvas(gl, expected, "should be " + expected[0] + "," + expected[1] + "," + expected[2] + "," + expected[3]);
}
}
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