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/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for colour blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.colour');
goog.require('Blockly.Lua');
Blockly.Lua['colour_picker'] = function(block) {
// Colour picker.
var code = '\'' + block.getFieldValue('COLOUR') + '\'';
return [code, Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['colour_random'] = function(block) {
// Generate a random colour.
var code = 'string.format("#%06x", math.random(0, 2^24 - 1))';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['colour_rgb'] = function(block) {
// Compose a colour from RGB components expressed as percentages.
var functionName = Blockly.Lua.provideFunction_(
'colour_rgb',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(r, g, b)',
' r = math.floor(math.min(100, math.max(0, r)) * 2.55 + .5)',
' g = math.floor(math.min(100, math.max(0, g)) * 2.55 + .5)',
' b = math.floor(math.min(100, math.max(0, b)) * 2.55 + .5)',
' return string.format("#%02x%02x%02x", r, g, b)',
'end']);
var r = Blockly.Lua.valueToCode(block, 'RED',
Blockly.Lua.ORDER_NONE) || 0;
var g = Blockly.Lua.valueToCode(block, 'GREEN',
Blockly.Lua.ORDER_NONE) || 0;
var b = Blockly.Lua.valueToCode(block, 'BLUE',
Blockly.Lua.ORDER_NONE) || 0;
var code = functionName + '(' + r + ', ' + g + ', ' + b + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['colour_blend'] = function(block) {
// Blend two colours together.
var functionName = Blockly.Lua.provideFunction_(
'colour_blend',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(colour1, colour2, ratio)',
' local r1 = tonumber(string.sub(colour1, 2, 3), 16)',
' local r2 = tonumber(string.sub(colour2, 2, 3), 16)',
' local g1 = tonumber(string.sub(colour1, 4, 5), 16)',
' local g2 = tonumber(string.sub(colour2, 4, 5), 16)',
' local b1 = tonumber(string.sub(colour1, 6, 7), 16)',
' local b2 = tonumber(string.sub(colour2, 6, 7), 16)',
' local ratio = math.min(1, math.max(0, ratio))',
' local r = math.floor(r1 * (1 - ratio) + r2 * ratio + .5)',
' local g = math.floor(g1 * (1 - ratio) + g2 * ratio + .5)',
' local b = math.floor(b1 * (1 - ratio) + b2 * ratio + .5)',
' return string.format("#%02x%02x%02x", r, g, b)',
'end']);
var colour1 = Blockly.Lua.valueToCode(block, 'COLOUR1',
Blockly.Lua.ORDER_NONE) || '\'#000000\'';
var colour2 = Blockly.Lua.valueToCode(block, 'COLOUR2',
Blockly.Lua.ORDER_NONE) || '\'#000000\'';
var ratio = Blockly.Lua.valueToCode(block, 'RATIO',
Blockly.Lua.ORDER_NONE) || 0;
var code = functionName + '(' + colour1 + ', ' + colour2 + ', ' + ratio + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
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