Implement OES_texture_float_linear and OES_texture_half_float_linear extensions in WebGL.

LayoutTests/webgl/resources/webgl_test_files/conformance/resources/oes-texture-float-and-half-float-linear.js

+/*
+** Copyright (c) 2013 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+function generateTest(extensionTypeName, extensionName, pixelType, prologue) {
+    var wtu = WebGLTestUtils;
+    var gl = null;
+    var successfullyParsed = false;
+
+    var init = function()
+    {
+        initTestingHarnessWaitUntilDone();
+        description("This test verifies the functionality of the " + extensionName + " extension, if it is available.");
+
+        var canvas = document.getElementById("canvas");
+        gl = wtu.create3DContext(canvas);
+
+        if (!prologue(gl, extensionTypeName)) {
+            finishTest();
+            return;
+        }
+
+        // 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);
+        }
+
+        finishTest();
+    }
+
+    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)
+    {
+        var format = gl.RGBA;
+        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, format, format, gl[pixelType], canvas2d);
+            if (minFilter != gl.NEAREST && minFilter !=  gl.LINEAR)
+            gl.generateMipmap(gl.TEXTURE_2D);
+        }
+        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, format, format, gl[pixelType], canvas2d);
+                if (minFilter != gl.NEAREST && minFilter !=  gl.LINEAR)
+                    gl.generateMipmap(gl.TEXTURE_CUBE_MAP);
+        }
+        wtu.drawQuad(gl);
+        if (!linear) {
+            glErrorShouldBe(gl, gl.NO_ERROR, extensionTypeName + " texture with non-Linear filter should succeed with NO_ERROR no matter whether " + extensionName + " is enabled or not");
+        } else if (!extensionEnabled) {
+            glErrorShouldBe(gl, gl.NO_ERROR, extensionTypeName + " texture with Linear filter should produce [0, 0, 0, 1.0] with NO_ERROR if " + extensionName + " isn't enabled");
+        } else {
+            glErrorShouldBe(gl, gl.NO_ERROR, extensionTypeName + " texture with Linear filter should succeed with NO_ERROR if " + extensionTypeName + " is enabled");
+        }
+
+        wtu.checkCanvas(gl, expected, "should be " + expected[0] + "," + expected[1]  + "," +  expected[2] + "," + expected[3]);
+    }
+
+    return init;
+}