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// Copyright (c) 2013 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function() {
var getContext = function(c, params) {
return c.getContext('webgl', params) || c.getContext("experimental-webgl", params);
};
var Graphics3D_GetAttribMaxValue = function(instance, attribute, value) {
throw "Graphics3D_GetAttribMaxValue not implemented";
};
var Graphics3D_Create = function(instance, share_context, attrib_list) {
var i = resources.resolve(instance, INSTANCE_RESOURCE);
if (i === undefined) {
return 0;
}
if (share_context !== 0) {
throw "Graphics3D shared contexts not supported.";
}
var alpha_size = 0;
var blue_size = 0;
var green_size = 0;
var red_size = 0;
var depth_size = 0;
var stencil_size = 0;
var samples = 0;
var sample_buffers = 0;
var width = 0;
var height = 0;
var swap_behavior = ppapi.PP_GRAPHICS3DATTRIB_BUFFER_DESTROYED;
var gpu_preference = ppapi.PP_GRAPHICS3DATTRIB_GPU_PREFERENCE_PERFORMANCE;
if (attrib_list) {
var ptr = attrib_list;
while (true) {
var name = getValue(ptr, 'i32');
// name === 0 isn't part of the spec, but support it anyways.
if (name === ppapi.PP_GRAPHICS3DATTRIB_NONE || name === 0) break;
ptr += 4;
var value = getValue(ptr, 'i32');
ptr += 4;
switch (name) {
case ppapi.PP_GRAPHICS3DATTRIB_ALPHA_SIZE:
alpha_size = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_BLUE_SIZE:
blue_size = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_GREEN_SIZE:
green_size = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_RED_SIZE:
red_size = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_DEPTH_SIZE:
depth_size = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_STENCIL_SIZE:
stencil_size = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_SAMPLES:
samples = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_SAMPLE_BUFFERS:
sample_buffers = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_HEIGHT:
height = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_WIDTH:
width = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_SWAP_BEHAVIOR:
swap_behavior = value;
break;
case ppapi.PP_GRAPHICS3DATTRIB_GPU_PREFERENCE_PERFORMANCE:
gpu_preference = value;
default:
console.error("Unreconized GRAPHICS3DATTRIB " + name);
return 0;
}
}
}
// Note: the canvas is not opaque.
var canvas = i.createCanvas(width, height, false);
canvas.style.width = "100%";
canvas.style.height = "100%";
return resources.register(GRAPHICS_3D_RESOURCE, {
canvas: canvas,
bound: false,
ctx: getContext(canvas, {
"alpha": alpha_size > 0,
"depth": depth_size > 0,
"stencil": stencil_size > 0,
"antialias": sample_buffers !== 0 && samples > 1,
"preserveDrawingBuffer": swap_behavior === ppapi.PP_GRAPHICS3DATTRIB_BUFFER_PRESERVED
}),
notifyBound: function(instance) {
this.bound = true;
instance.element.appendChild(this.canvas);
},
notifyUnbound: function(instance) {
instance.element.removeChild(this.canvas);
this.bound = false;
}
});
};
var Graphics3D_IsGraphics3D = function(resource) {
return resources.is(resource, GRAPHICS_3D_RESOURCE);
};
var Graphics3D_GetAttribs = function(context, attrib_list) {
throw "Graphics3D_GetAttribs not implemented";
};
var Graphics3D_SetAttribs = function(context, attrib_list) {
throw "Graphics3D_SetAttribs not implemented";
};
var Graphics3D_GetError = function(context) {
throw "Graphics3D_GetError not implemented";
};
var Graphics3D_ResizeBuffers = function(context, width, height) {
var c = resources.resolve(context, GRAPHICS_3D_RESOURCE);
if (c === undefined) {
return ppapi.PP_ERROR_BADRESOURCE;
}
if (width < 0 || height < 0) {
return ppapi.PP_ERROR_BADARGUMENT;
}
c.canvas.width = width;
c.canvas.height = height;
return ppapi.PP_OK;
};
var Graphics3D_SwapBuffers = function(context, callback) {
// TODO double buffering.
var c = glue.getCompletionCallback(callback);
Module.requestAnimationFrame(function() {
c(0);
});
};
registerInterface("PPB_Graphics3D;1.0", [
Graphics3D_GetAttribMaxValue,
Graphics3D_Create,
Graphics3D_IsGraphics3D,
Graphics3D_GetAttribs,
Graphics3D_SetAttribs,
Graphics3D_GetError,
Graphics3D_ResizeBuffers,
Graphics3D_SwapBuffers,
], function() {
return !!getContext(document.createElement("canvas"));
});
})();
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