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GraphicsCanvasRenderer.js
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GraphicsCanvasRenderer.js
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/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2013-2023 Photon Storm Ltd.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var Commands = require('./Commands');
var SetTransform = require('../../renderer/canvas/utils/SetTransform');
/**
* Renders this Game Object with the Canvas Renderer to the given Camera.
* The object will not render if any of its renderFlags are set or it is being actively filtered out by the Camera.
* This method should not be called directly. It is a utility function of the Render module.
*
* @method Phaser.GameObjects.Graphics#renderCanvas
* @since 3.0.0
* @private
*
* @param {Phaser.Renderer.Canvas.CanvasRenderer} renderer - A reference to the current active Canvas renderer.
* @param {Phaser.GameObjects.Graphics} src - The Game Object being rendered in this call.
* @param {Phaser.Cameras.Scene2D.Camera} camera - The Camera that is rendering the Game Object.
* @param {Phaser.GameObjects.Components.TransformMatrix} parentMatrix - This transform matrix is defined if the game object is nested
* @param {CanvasRenderingContext2D} [renderTargetCtx] - The target rendering context.
* @param {boolean} allowClip - If `true` then path operations will be used instead of fill operations.
*/
var GraphicsCanvasRenderer = function (renderer, src, camera, parentMatrix, renderTargetCtx, allowClip)
{
var commandBuffer = src.commandBuffer;
var commandBufferLength = commandBuffer.length;
var ctx = renderTargetCtx || renderer.currentContext;
if (commandBufferLength === 0 || !SetTransform(renderer, ctx, src, camera, parentMatrix))
{
return;
}
camera.addToRenderList(src);
var lineAlpha = 1;
var fillAlpha = 1;
var lineColor = 0;
var fillColor = 0;
var lineWidth = 1;
var red = 0;
var green = 0;
var blue = 0;
// Reset any currently active paths
ctx.beginPath();
for (var index = 0; index < commandBufferLength; ++index)
{
var commandID = commandBuffer[index];
switch (commandID)
{
case Commands.ARC:
ctx.arc(
commandBuffer[index + 1],
commandBuffer[index + 2],
commandBuffer[index + 3],
commandBuffer[index + 4],
commandBuffer[index + 5],
commandBuffer[index + 6]
);
// +7 because overshoot is the 7th value, not used in Canvas
index += 7;
break;
case Commands.LINE_STYLE:
lineWidth = commandBuffer[index + 1];
lineColor = commandBuffer[index + 2];
lineAlpha = commandBuffer[index + 3];
red = ((lineColor & 0xFF0000) >>> 16);
green = ((lineColor & 0xFF00) >>> 8);
blue = (lineColor & 0xFF);
ctx.strokeStyle = 'rgba(' + red + ',' + green + ',' + blue + ',' + lineAlpha + ')';
ctx.lineWidth = lineWidth;
index += 3;
break;
case Commands.FILL_STYLE:
fillColor = commandBuffer[index + 1];
fillAlpha = commandBuffer[index + 2];
red = ((fillColor & 0xFF0000) >>> 16);
green = ((fillColor & 0xFF00) >>> 8);
blue = (fillColor & 0xFF);
ctx.fillStyle = 'rgba(' + red + ',' + green + ',' + blue + ',' + fillAlpha + ')';
index += 2;
break;
case Commands.BEGIN_PATH:
ctx.beginPath();
break;
case Commands.CLOSE_PATH:
ctx.closePath();
break;
case Commands.FILL_PATH:
if (!allowClip)
{
ctx.fill();
}
break;
case Commands.STROKE_PATH:
if (!allowClip)
{
ctx.stroke();
}
break;
case Commands.FILL_RECT:
if (!allowClip)
{
ctx.fillRect(
commandBuffer[index + 1],
commandBuffer[index + 2],
commandBuffer[index + 3],
commandBuffer[index + 4]
);
}
else
{
ctx.rect(
commandBuffer[index + 1],
commandBuffer[index + 2],
commandBuffer[index + 3],
commandBuffer[index + 4]
);
}
index += 4;
break;
case Commands.FILL_TRIANGLE:
ctx.beginPath();
ctx.moveTo(commandBuffer[index + 1], commandBuffer[index + 2]);
ctx.lineTo(commandBuffer[index + 3], commandBuffer[index + 4]);
ctx.lineTo(commandBuffer[index + 5], commandBuffer[index + 6]);
ctx.closePath();
if (!allowClip)
{
ctx.fill();
}
index += 6;
break;
case Commands.STROKE_TRIANGLE:
ctx.beginPath();
ctx.moveTo(commandBuffer[index + 1], commandBuffer[index + 2]);
ctx.lineTo(commandBuffer[index + 3], commandBuffer[index + 4]);
ctx.lineTo(commandBuffer[index + 5], commandBuffer[index + 6]);
ctx.closePath();
if (!allowClip)
{
ctx.stroke();
}
index += 6;
break;
case Commands.LINE_TO:
ctx.lineTo(
commandBuffer[index + 1],
commandBuffer[index + 2]
);
index += 2;
break;
case Commands.MOVE_TO:
ctx.moveTo(
commandBuffer[index + 1],
commandBuffer[index + 2]
);
index += 2;
break;
case Commands.LINE_FX_TO:
ctx.lineTo(
commandBuffer[index + 1],
commandBuffer[index + 2]
);
index += 5;
break;
case Commands.MOVE_FX_TO:
ctx.moveTo(
commandBuffer[index + 1],
commandBuffer[index + 2]
);
index += 5;
break;
case Commands.SAVE:
ctx.save();
break;
case Commands.RESTORE:
ctx.restore();
break;
case Commands.TRANSLATE:
ctx.translate(
commandBuffer[index + 1],
commandBuffer[index + 2]
);
index += 2;
break;
case Commands.SCALE:
ctx.scale(
commandBuffer[index + 1],
commandBuffer[index + 2]
);
index += 2;
break;
case Commands.ROTATE:
ctx.rotate(
commandBuffer[index + 1]
);
index += 1;
break;
case Commands.GRADIENT_FILL_STYLE:
index += 5;
break;
case Commands.GRADIENT_LINE_STYLE:
index += 6;
break;
}
}
// Restore the context saved in SetTransform
ctx.restore();
};
module.exports = GraphicsCanvasRenderer;