third_party/WebKit/LayoutTests/fast/canvas/webgl/object-deletion-behaviour.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <meta charset="utf-8">
   5 <script src="../../../resources/js-test.js"></script>
   6 <script src="resources/webgl-test.js"></script>
   7 <script src="resources/webgl-test-utils.js"></script>
   8 </head>
   9 <body>
  10 <div id="description"></div>
  11 <div id="console"></div>
  12
  13 <script>
  14 description("Tests deletion behavior for texture, renderbuffer, shader, and program");
  15
  16 if (window.internals)
  17     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
  18
  19 var wtu = WebGLTestUtils;
  20 var gl = wtu.create3DContext();
  21 var shouldGenerateGLError = wtu.shouldGenerateGLError;
  22
  23 debug("");
  24 debug("shader and program deletion");
  25
  26 var vertexShader = wtu.loadStandardVertexShader(gl);
  27 assertMsg(vertexShader, "vertex shader loaded");
  28 var fragmentShader = wtu.loadStandardFragmentShader(gl);
  29 assertMsg(fragmentShader, "fragment shader loaded");
  30
  31 var program = gl.createProgram();
  32 shouldBeNonNull("program");
  33 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.attachShader(program, vertexShader)");
  34 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.attachShader(program, fragmentShader)");
  35 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.linkProgram(program)");
  36 shouldBeTrue("gl.getProgramParameter(program, gl.LINK_STATUS)");
  37 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.useProgram(program)");
  38 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteShader(vertexShader)");
  39 shouldBeTrue("gl.isShader(vertexShader)");
  40 shouldBeTrue("gl.getShaderParameter(vertexShader, gl.DELETE_STATUS)");
  41 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.detachShader(program, vertexShader)");
  42 shouldBeFalse("gl.isShader(vertexShader)");
  43 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteShader(fragmentShader)");
  44 shouldBeTrue("gl.isShader(fragmentShader)");
  45 shouldBeTrue("gl.getShaderParameter(fragmentShader, gl.DELETE_STATUS)");
  46 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteProgram(program)");
  47 shouldBeTrue("gl.isProgram(program)");
  48 shouldBeTrue("gl.getProgramParameter(program, gl.DELETE_STATUS)");
  49 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.useProgram(null)");
  50 shouldBeFalse("gl.isProgram(program)");
  51 shouldBeFalse("gl.isShader(fragmentShader)");
  52
  53 debug("");
  54 debug("texture deletion");
  55
  56 var fbo = gl.createFramebuffer(), fbo2 = gl.createFramebuffer(), fbo3 = gl.createFramebuffer();
  57 shouldBeNonNull("fbo");
  58 shouldBeNonNull("fbo2");
  59 shouldBeNonNull("fbo3");
  60 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
  61
  62 var tex = gl.createTexture();
  63 shouldBeNonNull("tex");
  64 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, tex)");
  65 shouldBe("gl.getParameter(gl.TEXTURE_BINDING_2D)", "tex");
  66 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0)");
  67 shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "tex");
  68 shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.TEXTURE");
  69 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTexture(tex)");
  70 // Deleting a texture bound to the currently-bound fbo is the same as
  71 // detaching the textue from fbo first, then delete the texture.
  72 shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.NONE");
  73 shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)");
  74 shouldBeFalse("gl.isTexture(tex)");
  75 shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_2D)");
  76 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, tex)");
  77 shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_2D)");
  78
  79 var texCubeMap = gl.createTexture();
  80 shouldBeNonNull("texCubeMap");
  81 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_CUBE_MAP, texCubeMap)");
  82 shouldBe("gl.getParameter(gl.TEXTURE_BINDING_CUBE_MAP)", "texCubeMap");
  83 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTexture(texCubeMap)");
  84 shouldBeFalse("gl.isTexture(texCubeMap)");
  85 shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_CUBE_MAP)");
  86 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_CUBE_MAP, texCubeMap)");
  87 shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_CUBE_MAP)");
  88
  89 var t = gl.createTexture();
  90 shouldBeNonNull("t");
  91 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, t)");
  92 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)");
  93 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTexture(t)");
  94 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, t)");
  95 shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)");
  96
  97 var t2 = gl.createTexture();
  98 shouldBeNonNull("t2");
  99 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.activeTexture(gl.TEXTURE0)");
 100 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, t2)");
 101 shouldBe("gl.getParameter(gl.TEXTURE_BINDING_2D)", "t2");
 102 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.activeTexture(gl.TEXTURE1)");
 103 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, t2)");
 104 shouldBe("gl.getParameter(gl.TEXTURE_BINDING_2D)", "t2");
 105 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTexture(t2)");
 106 shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_2D)");
 107 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.activeTexture(gl.TEXTURE0)");
 108 shouldBeNull("gl.getParameter(gl.TEXTURE_BINDING_2D)");
 109
 110 debug("");
 111 debug("renderbuffer deletion");
 112
 113 var rbo = gl.createRenderbuffer(), rbo2 = gl.createRenderbuffer(), rbo3 = gl.createRenderbuffer();
 114 shouldBeNonNull("rbo");
 115 shouldBeNonNull("rbo2");
 116 shouldBeNonNull("rbo3");
 117 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)");
 118 shouldBe("gl.getParameter(gl.RENDERBUFFER_BINDING)", "rbo");
 119 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo)");
 120 shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rbo");
 121 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteRenderbuffer(rbo)");
 122 // Deleting a renderbuffer bound to the currently-bound fbo is the same as
 123 // detaching the renderbuffer from fbo first, then delete the renderbuffer.
 124 shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.NONE");
 125 shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)");
 126 shouldBeFalse("gl.isRenderbuffer(rbo)");
 127 shouldBeNull("gl.getParameter(gl.RENDERBUFFER_BINDING)");
 128 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)");
 129 shouldBeNull("gl.getParameter(gl.RENDERBUFFER_BINDING)");
 130 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo2)");
 131 shouldBe("gl.getParameter(gl.RENDERBUFFER_BINDING)", "rbo2");
 132 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteRenderbuffer(rbo3)");
 133 shouldBe("gl.getParameter(gl.RENDERBUFFER_BINDING)", "rbo2");
 134
 135 debug("");
 136 debug("using deleted renderbuffer");
 137 rbo = gl.createRenderbuffer();
 138 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)");
 139 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16)");
 140 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 141 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo)");
 142 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
 143   // make backbuffer red
 144   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 145   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(1,0,0,1)");
 146   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 147   // make fbo green
 148   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 149   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,1,0,1)");
 150   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 151   // Bind backbuffer.
 152   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 153   // delete renderbuffer. It should still be attached to fbo though.
 154   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteRenderbuffer(rbo)");
 155   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [255,0,0,255], "backbuffer should be red")');
 156   // Use fbo that has deleted rbo.
 157   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 158   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [0,255,0,255], "fbo should be green")');
 159   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,0,1,1)");
 160   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 161   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [0,0,255,255], "fbo should be blue")');
 162   // Bind backbuffer.
 163   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 164   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [255,0,0,255], "backbuffer should be red")');
 165 }
 166
 167 debug("");
 168 debug("renderbuffer attached twice to same framebuffer");
 169 rbo = gl.createRenderbuffer();
 170 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)");
 171 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16)");
 172 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 173 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo)");
 174 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
 175   rbo2 = gl.createRenderbuffer();
 176   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo2)");
 177   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16)");
 178   // attach rbo2 at two attachment points incompatible with it
 179   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, rbo2)");
 180   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, rbo2)");
 181   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rbo2");
 182   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rbo2");
 183   // fbo can't be complete as rbo2 is attached at incompatible attachment points
 184   shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 185   // now we delete rbo2, which detaches it from the two attachment points where it currently is attached
 186   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteRenderbuffer(rbo2)");
 187   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.NONE");
 188   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)", "gl.NONE");
 189   // we should now be in the same state as before with only rbo attached, so fbo should be complete again
 190   shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 191   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rbo");
 192 }
 193 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteRenderbuffer(rbo)");
 194 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 195
 196
 197
 198 debug("");
 199 debug("using deleted texture");
 200 tex = gl.createTexture();
 201 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, tex)");
 202 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 203 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0)");
 204 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, null)");
 205 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
 206   // make fbo green
 207   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 208   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,1,0,1)");
 209   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 210   // Bind backbuffer.
 211   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 212   // delete texture. It should still be attached to fbo though.
 213   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTexture(tex)");
 214   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 1, 1, [255,0,0,255], "backbuffer should be red")');
 215   // Use fbo that has deleted texture.
 216   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 217   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0,255,0,255], "fbo should be green")');
 218   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,0,1,1)");
 219   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 220   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0,0,255,255], "fbo should be blue")');
 221   // Bind backbuffer.
 222   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 223   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [255,0,0,255], "backbuffer should be red")');
 224 }
 225
 226 debug("");
 227 debug("using deleted renderbuffer");
 228 rbo = gl.createRenderbuffer();
 229 shouldBeNonNull("rbo");
 230 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)");
 231 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16)");
 232 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 233 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo)");
 234 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
 235   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo2)");
 236   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo)");
 237   shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 238   // make backbuffer red
 239   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 240   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(1,0,0,1)");
 241   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 242   // make fbo green
 243   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 244   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,1,0,1)");
 245   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 246   // delete renderbuffer. It should still be attached to fbo2 though.
 247   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteRenderbuffer(rbo)");
 248   // fbo has no attachments
 249   shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 250   // Use fbo2 that has deleted rbo.
 251   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo2)");
 252   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [0,255,0,255], "fbo should be green")');
 253   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,0,1,1)");
 254   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 255   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [0,0,255,255], "fbo should be blue")');
 256   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "rbo");
 257
 258   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 259   shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)");
 260   shouldGenerateGLError(gl, gl.NONE, "gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE)");
 261   shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 262   // Bind backbuffer.
 263   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 264   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [255,0,0,255], "backbuffer should be red")');
 265 }
 266
 267 debug("");
 268 debug("using deleted texture");
 269 tex = gl.createTexture();
 270 shouldBeNonNull("tex");
 271 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindTexture(gl.TEXTURE_2D, tex)");
 272 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 273 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0)");
 274 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, null)");
 275 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
 276   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo2)");
 277   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0)");
 278   // make fbo green
 279   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 280   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,1,0,1)");
 281   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 282   // delete texture. It should still be attached to fbo2 though.
 283   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteTexture(tex)");
 284   // fbo has no attachments
 285   shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 286   // Use fbo that has deleted texture.
 287   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo2)");
 288   shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 289   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0,255,0,255], "fbo should be green")');
 290   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,0,1,1)");
 291   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 292   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0,0,255,255], "fbo should be blue")');
 293   shouldBe("gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)", "tex");
 294
 295   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 296   shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.getFramebufferAttachmentParameter(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME)");
 297   shouldNotBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
 298   // Bind backbuffer.
 299   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 300   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [255,0,0,255], "backbuffer should be red")');
 301 }
 302
 303 debug("");
 304 debug("buffer deletion");
 305
 306 var buffer = gl.createBuffer();
 307 shouldBeNonNull("buffer");
 308 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, buffer)");
 309 shouldBe("gl.getParameter(gl.ARRAY_BUFFER_BINDING)", "buffer");
 310 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(buffer)");
 311 shouldBeFalse("gl.isBuffer(buffer)");
 312 shouldBeNull("gl.getParameter(gl.ARRAY_BUFFER_BINDING)");
 313 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, buffer)");
 314 shouldBeNull("gl.getParameter(gl.ARRAY_BUFFER_BINDING)");
 315
 316 var buffer2 = gl.createBuffer();
 317 shouldBeNonNull("buffer2");
 318 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, buffer2)");
 319 shouldBe("gl.getParameter(gl.ARRAY_BUFFER_BINDING)", "buffer2");
 320 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, null)");
 321 shouldBeNull("gl.getParameter(gl.ARRAY_BUFFER_BINDING)");
 322 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(buffer2)");
 323 shouldBeFalse("gl.isBuffer(buffer2)");
 324 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, buffer2)");
 325 shouldBeNull("gl.getParameter(gl.ARRAY_BUFFER_BINDING)");
 326
 327 var bufferElement = gl.createBuffer();
 328 shouldBeNonNull("bufferElement");
 329 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, bufferElement)");
 330 shouldBe("gl.getParameter(gl.ELEMENT_ARRAY_BUFFER_BINDING)", "bufferElement");
 331 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(bufferElement)");
 332 shouldBeFalse("gl.isBuffer(bufferElement)");
 333 shouldBeNull("gl.getParameter(gl.ELEMENT_ARRAY_BUFFER_BINDING)");
 334 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, bufferElement)");
 335 shouldBeNull("gl.getParameter(gl.ELEMENT_ARRAY_BUFFER_BINDING)");
 336
 337 var b = gl.createBuffer();
 338 shouldBeNonNull("b");
 339 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, b)");
 340 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bufferData(gl.ARRAY_BUFFER, 1, gl.STATIC_DRAW)");
 341 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(b)");
 342 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, b)");
 343 shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bufferData(gl.ARRAY_BUFFER, 1, gl.STATIC_DRAW)");
 344
 345 var b1 = gl.createBuffer();
 346 shouldBeNonNull("b1");
 347 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, b1);");
 348 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.enableVertexAttribArray(1);");
 349 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.vertexAttribPointer(1, 4, gl.FLOAT, false, 0, 0);");
 350 var b2 = gl.createBuffer();
 351 shouldBeNonNull("b2");
 352 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindBuffer(gl.ARRAY_BUFFER, b2);");
 353 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.enableVertexAttribArray(2);");
 354 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.vertexAttribPointer(2, 4, gl.FLOAT, false, 0, 0);");
 355 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.enableVertexAttribArray(3);");
 356 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.vertexAttribPointer(3, 4, gl.FLOAT, false, 0, 0);");
 357 shouldBe("gl.getVertexAttrib(1, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)", "b1");
 358 shouldBe("gl.getVertexAttrib(2, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)", "b2");
 359 shouldBe("gl.getVertexAttrib(3, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)", "b2");
 360 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(b2);");
 361 shouldBe("gl.getVertexAttrib(1, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)", "b1");
 362 shouldBeNull("gl.getVertexAttrib(2, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)");
 363 shouldBeNull("gl.getVertexAttrib(3, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)");
 364 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteBuffer(b1);");
 365 shouldBeNull("gl.getVertexAttrib(1, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING)");
 366
 367 debug("");
 368 debug("framebuffer deletion");
 369
 370 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 371 shouldBe("gl.getParameter(gl.FRAMEBUFFER_BINDING)", "fbo");
 372 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteFramebuffer(fbo)");
 373 shouldBeFalse("gl.isFramebuffer(fbo)");
 374 shouldBeNull("gl.getParameter(gl.FRAMEBUFFER_BINDING)");
 375 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 376 shouldBeNull("gl.getParameter(gl.FRAMEBUFFER_BINDING)");
 377 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo2)");
 378 shouldBe("gl.getParameter(gl.FRAMEBUFFER_BINDING)", "fbo2");
 379 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteFramebuffer(fbo3)");
 380 shouldBe("gl.getParameter(gl.FRAMEBUFFER_BINDING)", "fbo2");
 381
 382 fbo = gl.createFramebuffer();
 383 rbo = gl.createRenderbuffer();
 384 shouldBeNonNull("fbo");
 385 shouldBeNonNull("rbo");
 386 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 387 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindRenderbuffer(gl.RENDERBUFFER, rbo)");
 388 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, 16, 16)");
 389 shouldGenerateGLError(gl, gl.NO_ERROR, "gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo)");
 390 if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
 391   // set backbuffer to red
 392   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 393   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(1,0,0,1)");
 394   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 395   // set framebuffer to green
 396   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, fbo)");
 397   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,1,0,1)");
 398   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 399   // check framebuffer
 400   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 16, 16, [0,255,0,255], "fbo should be green")');
 401   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 16, 16, 1, 1, [0,0,0,0], "outside fbo should be black")');
 402   // delete framebuffer. because this was the bound fbo the backbuffer should be active now
 403   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.deleteFramebuffer(fbo)");
 404   // check backbuffer
 405   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 300, 150, [255,0,0,255], "backbuffer should be red")');
 406   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 300, 0, 300, 300, [0,0,0,0], "outside backbuffer should be black")');
 407   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 150, 300, 300, [0,0,0,0], "outside backbuffer should be black")');
 408   // check drawing to backbuffer
 409   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clearColor(0,1,0,1)");
 410   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.clear(gl.COLOR_BUFFER_BIT)");
 411   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 300, 150, [0,255,0,255], "fbo should be green")');
 412   shouldGenerateGLError(gl, gl.NO_ERROR, "gl.bindFramebuffer(gl.FRAMEBUFFER, null)");
 413   // check again because many buggy implementations will have bound to the true backbuffer on deleteFramebuffer.
 414   shouldGenerateGLError(gl, gl.NO_ERROR, 'wtu.checkCanvasRect(gl, 0, 0, 300, 150, [0,255,0,255], "fbo should be green")');
 415 }
 416
 417 successfullyParsed = true;
 418 </script>
 419
 420 </body>
 421 </html>