import { Geometry,
Buffer,
ObjectRenderer,
checkMaxIfStatmentsInShader } from '@pixi/core';
import { settings } from '@pixi/settings';
import { createIndicesForQuads, premultiplyBlendMode, premultiplyTint } from '@pixi/utils';
import bitTwiddle from 'bit-twiddle';
import BatchBuffer from './BatchBuffer';
import generateMultiTextureShader from './generateMultiTextureShader';
let TICK = 0;
// const TEXTURE_TICK = 0;
/**
* Renderer dedicated to drawing and batching sprites.
*
* @class
* @private
* @memberof PIXI
* @extends PIXI.ObjectRenderer
*/
export default class SpriteRenderer extends ObjectRenderer
{
/**
* @param {PIXI.Renderer} renderer - The renderer this sprite batch works for.
*/
constructor(renderer)
{
super(renderer);
/**
* Number of values sent in the vertex buffer.
* aVertexPosition(2), aTextureCoord(1), aColor(1), aTextureId(1) = 5
*
* @member {number}
*/
this.vertSize = 5;
/**
* The size of the vertex information in bytes.
*
* @member {number}
*/
this.vertByteSize = this.vertSize * 4;
/**
* The number of images in the SpriteRenderer before it flushes.
*
* @member {number}
*/
this.size = settings.SPRITE_BATCH_SIZE; // 2000 is a nice balance between mobile / desktop
// the total number of bytes in our batch
// let numVerts = this.size * 4 * this.vertByteSize;
this.buffers = [];
for (let i = 1; i <= bitTwiddle.nextPow2(this.size); i *= 2)
{
this.buffers.push(new BatchBuffer(i * 4 * this.vertByteSize));
}
/**
* Holds the indices of the geometry (quads) to draw
*
* @member {Uint16Array}
*/
this.indices = createIndicesForQuads(this.size);
this.indexBuffer = new Buffer(this.indices, true, true);
/**
* The default shaders that is used if a sprite doesn't have a more specific one.
* there is a shader for each number of textures that can be rendererd.
* These shaders will also be generated on the fly as required.
* @member {PIXI.Shader[]}
*/
this.shader = null;
this.currentIndex = 0;
this.groups = [];
for (let k = 0; k < this.size; k++)
{
this.groups[k] = { textures: [], textureCount: 0, ids: [], size: 0, start: 0, blend: 0 };
}
this.sprites = [];
this.vertexBuffers = [];
this.vaos = [];
this.vaoMax = 2;
this.vertexCount = 0;
this.renderer.on('prerender', this.onPrerender, this);
}
/**
* Sets up the renderer context and necessary buffers.
*
* @private
*/
contextChange()
{
const gl = this.renderer.gl;
if (this.renderer.legacy)
{
this.MAX_TEXTURES = 1;
}
else
{
// step 1: first check max textures the GPU can handle.
this.MAX_TEXTURES = Math.min(gl.getParameter(gl.MAX_TEXTURE_IMAGE_UNITS), settings.SPRITE_MAX_TEXTURES);
// step 2: check the maximum number of if statements the shader can have too..
this.MAX_TEXTURES = checkMaxIfStatmentsInShader(this.MAX_TEXTURES, gl);
}
// generate generateMultiTextureProgram, may be a better move?
this.shader = generateMultiTextureShader(gl, this.MAX_TEXTURES);
// we use the second shader as the first one depending on your browser may omit aTextureId
// as it is not used by the shader so is optimized out.
for (let i = 0; i < this.vaoMax; i++)
{
const buffer = new Buffer(null, false);
/* eslint-disable max-len */
this.vaos[i] = new Geometry()
.addAttribute('aVertexPosition', buffer, 2, false, gl.FLOAT)
.addAttribute('aTextureCoord', buffer, 2, true, gl.UNSIGNED_SHORT)
.addAttribute('aColor', buffer, 4, true, gl.UNSIGNED_BYTE)
.addAttribute('aTextureId', buffer, 1, true, gl.FLOAT)
.addIndex(this.indexBuffer);
/* eslint-enable max-len */
this.vertexBuffers[i] = buffer;
}
}
/**
* Called before the renderer starts rendering.
*
*/
onPrerender()
{
this.vertexCount = 0;
}
/**
* Renders the sprite object.
*
* @param {PIXI.Sprite} sprite - the sprite to render when using this spritebatch
*/
render(sprite)
{
// TODO set blend modes..
// check texture..
if (this.currentIndex >= this.size)
{
this.flush();
}
// get the uvs for the texture
// if the uvs have not updated then no point rendering just yet!
if (!sprite._texture._uvs)
{
return;
}
// push a texture.
// increment the batchsize
this.sprites[this.currentIndex++] = sprite;
}
/**
* Renders the content and empties the current batch.
*
*/
flush()
{
if (this.currentIndex === 0)
{
return;
}
const gl = this.renderer.gl;
const MAX_TEXTURES = this.MAX_TEXTURES;
const np2 = bitTwiddle.nextPow2(this.currentIndex);
const log2 = bitTwiddle.log2(np2);
const buffer = this.buffers[log2];
const sprites = this.sprites;
const groups = this.groups;
const float32View = buffer.float32View;
const uint32View = buffer.uint32View;
const touch = this.renderer.textureGC.count;
let index = 0;
let nextTexture;
let currentTexture;
let groupCount = 1;
let textureId = 0;
let textureCount = 0;
let currentGroup = groups[0];
let vertexData;
let uvs;
let blendMode = premultiplyBlendMode[
sprites[0]._texture.baseTexture.premultiplyAlpha ? 1 : 0][sprites[0].blendMode];
currentGroup.textureCount = 0;
currentGroup.start = 0;
currentGroup.blend = blendMode;
TICK++;
let i;
for (i = 0; i < this.currentIndex; ++i)
{
// upload the sprite elemetns...
// they have all ready been calculated so we just need to push them into the buffer.
const sprite = sprites[i];
nextTexture = sprite._texture.baseTexture;
textureId = nextTexture._id;
const spriteBlendMode = premultiplyBlendMode[Number(nextTexture.premultiplyAlpha)][sprite.blendMode];
if (blendMode !== spriteBlendMode)
{
blendMode = spriteBlendMode;
// force the batch to break!
currentTexture = null;
textureCount = MAX_TEXTURES;
TICK++;
}
if (currentTexture !== nextTexture)
{
currentTexture = nextTexture;
if (nextTexture._enabled !== TICK)
{
if (textureCount === MAX_TEXTURES)
{
TICK++;
textureCount = 0;
currentGroup.size = i - currentGroup.start;
currentGroup = groups[groupCount++];
currentGroup.textureCount = 0;
currentGroup.blend = blendMode;
currentGroup.start = i;
}
nextTexture.touched = touch;
nextTexture._enabled = TICK;
nextTexture._id = textureCount;
currentGroup.textures[currentGroup.textureCount++] = nextTexture;
textureCount++;
}
}
vertexData = sprite.vertexData;
// TODO this sum does not need to be set each frame..
uvs = sprite._texture._uvs.uvsUint32;
textureId = nextTexture._id;
if (this.renderer.roundPixels)
{
const resolution = this.renderer.resolution;
// xy
float32View[index] = ((vertexData[0] * resolution) | 0) / resolution;
float32View[index + 1] = ((vertexData[1] * resolution) | 0) / resolution;
// xy
float32View[index + 5] = ((vertexData[2] * resolution) | 0) / resolution;
float32View[index + 6] = ((vertexData[3] * resolution) | 0) / resolution;
// xy
float32View[index + 10] = ((vertexData[4] * resolution) | 0) / resolution;
float32View[index + 11] = ((vertexData[5] * resolution) | 0) / resolution;
// xy
float32View[index + 15] = ((vertexData[6] * resolution) | 0) / resolution;
float32View[index + 16] = ((vertexData[7] * resolution) | 0) / resolution;
}
else
{
// xy
float32View[index] = vertexData[0];
float32View[index + 1] = vertexData[1];
// xy
float32View[index + 5] = vertexData[2];
float32View[index + 6] = vertexData[3];
// xy
float32View[index + 10] = vertexData[4];
float32View[index + 11] = vertexData[5];
// xy
float32View[index + 15] = vertexData[6];
float32View[index + 16] = vertexData[7];
}
uint32View[index + 2] = uvs[0];
uint32View[index + 7] = uvs[1];
uint32View[index + 12] = uvs[2];
uint32View[index + 17] = uvs[3];
/* eslint-disable max-len */
const alpha = Math.min(sprite.worldAlpha, 1.0);
const argb = alpha < 1.0 && nextTexture.premultiplyAlpha ? premultiplyTint(sprite._tintRGB, alpha)
: sprite._tintRGB + (alpha * 255 << 24);
uint32View[index + 3] = uint32View[index + 8] = uint32View[index + 13] = uint32View[index + 18] = argb;
float32View[index + 4] = float32View[index + 9] = float32View[index + 14] = float32View[index + 19] = textureId;
/* eslint-enable max-len */
index += 20;
}
currentGroup.size = i - currentGroup.start;
if (!settings.CAN_UPLOAD_SAME_BUFFER)
{
// this is still needed for IOS performance..
// it really does not like uploading to the same buffer in a single frame!
if (this.vaoMax <= this.vertexCount)
{
this.vaoMax++;
const buffer = new Buffer(null, false);
/* eslint-disable max-len */
this.vaos[this.vertexCount] = new Geometry()
.addAttribute('aVertexPosition', buffer, 2, false, gl.FLOAT)
.addAttribute('aTextureCoord', buffer, 2, true, gl.UNSIGNED_SHORT)
.addAttribute('aColor', buffer, 4, true, gl.UNSIGNED_BYTE)
.addAttribute('aTextureId', buffer, 1, true, gl.FLOAT)
.addIndex(this.indexBuffer);
/* eslint-enable max-len */
this.vertexBuffers[this.vertexCount] = buffer;
}
this.vertexBuffers[this.vertexCount].update(buffer.vertices, 0);
this.renderer.geometry.bind(this.vaos[this.vertexCount]);
this.vertexCount++;
}
else
{
// lets use the faster option, always use buffer number 0
this.vertexBuffers[this.vertexCount].update(buffer.vertices, 0);
this.renderer.geometry.updateBuffers();
}
// / render the groups..
for (i = 0; i < groupCount; i++)
{
const group = groups[i];
const groupTextureCount = group.textureCount;
for (let j = 0; j < groupTextureCount; j++)
{
this.renderer.texture.bind(group.textures[j], j);
}
// set the blend mode..
this.renderer.state.setBlendMode(group.blend);
gl.drawElements(gl.TRIANGLES, group.size * 6, gl.UNSIGNED_SHORT, group.start * 6 * 2);
}
// reset elements for the next flush
this.currentIndex = 0;
}
/**
* Starts a new sprite batch.
*/
start()
{
this.renderer.shader.bind(this.shader);
if (settings.CAN_UPLOAD_SAME_BUFFER)
{
// bind buffer #0, we don't need others
this.renderer.geometry.bind(this.vaos[this.vertexCount]);
}
}
/**
* Stops and flushes the current batch.
*
*/
stop()
{
this.flush();
}
/**
* Destroys the SpriteRenderer.
*
*/
destroy()
{
for (let i = 0; i < this.vaoMax; i++)
{
if (this.vertexBuffers[i])
{
this.vertexBuffers[i].destroy();
}
if (this.vaos[i])
{
this.vaos[i].destroy();
}
}
if (this.indexBuffer)
{
this.indexBuffer.destroy();
}
this.renderer.off('prerender', this.onPrerender, this);
if (this.shader)
{
this.shader.destroy();
this.shader = null;
}
this.vertexBuffers = null;
this.vaos = null;
this.indexBuffer = null;
this.indices = null;
this.sprites = null;
for (let i = 0; i < this.buffers.length; ++i)
{
this.buffers[i].destroy();
}
super.destroy();
}
}
