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Improve test_webgl_triangle.html

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This commit is contained in:
Imanol Fernandez 2016-10-03 16:15:37 +02:00
parent a07d6b37cc
commit 328dacee8b
1 changed files with 22 additions and 4 deletions
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26
tests/html/test_webgl_triangle.html
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@ -31,6 +31,8 @@ void main() {
</script> </script>
<script type="text/javascript"> <script type="text/javascript">
(function() {
var canvas; var canvas;
function initWebGL() function initWebGL()
{ {
@ -41,6 +43,10 @@ void main() {
} }
var gl = initWebGL(); var gl = initWebGL();
if (!gl) {
alert("No webgl context found!");
return;
}
// Setup Shaders: // Setup Shaders:
var v = document.getElementById("vertexshader").firstChild.nodeValue; var v = document.getElementById("vertexshader").firstChild.nodeValue;
@ -54,7 +60,8 @@ void main() {
gl.compileShader(vs); gl.compileShader(vs);
if (!gl.getShaderParameter(vs, gl.COMPILE_STATUS)) { if (!gl.getShaderParameter(vs, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(vs)); alert("Shader failed to compile. Reason: " + gl.getShaderInfoLog(vs));
return;
} }
var fs = gl.createShader(gl.FRAGMENT_SHADER); var fs = gl.createShader(gl.FRAGMENT_SHADER);
@ -62,7 +69,8 @@ void main() {
gl.compileShader(fs); gl.compileShader(fs);
if (!gl.getShaderParameter(fs, gl.COMPILE_STATUS)) { if (!gl.getShaderParameter(fs, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(fs)); alert("Shader failed to compile. Reason: " + gl.getShaderInfoLog(fs));
return;
} }
program = gl.createProgram(); program = gl.createProgram();
@ -70,8 +78,16 @@ void main() {
gl.attachShader(program, fs); gl.attachShader(program, fs);
gl.linkProgram(program); gl.linkProgram(program);
// if (!gl.getProgramParameter(program, gl.LINK_STATUS)) if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
// alert(gl.getProgramInfoLog(program)); alert("Shader failed to link. Reason: " + gl.getProgramInfoLog(program));
return;
}
gl.validateProgram(program);
if (!gl.getProgramParameter( program, gl.VALIDATE_STATUS)) {
alert("Program failed to validate. Reason: " + gl.getProgramInfoLog(program));
return;
}
// Setup Geometry // Setup Geometry
var vertices = new Float32Array([ var vertices = new Float32Array([
@ -107,6 +123,8 @@ void main() {
// Draw // Draw
gl.drawArrays(gl.TRIANGLES, 0, 3); gl.drawArrays(gl.TRIANGLES, 0, 3);
})();
</script> </script>
</body> </body>
</html> </html>