package net.minecraft.client.shader;
import com.google.common.base.Charsets;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.renderer.texture.ITextureObject;
import net.minecraft.client.resources.IResourceManager;
import net.minecraft.client.util.JsonBlendingMode;
import net.minecraft.client.util.JsonException;
import net.minecraft.util.JsonUtils;
import net.minecraft.util.ResourceLocation;
import org.apache.commons.io.IOUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class ShaderManager
{
private static final Logger logger = LogManager.getLogger();
private static final ShaderDefault defaultShaderUniform = new ShaderDefault();
private static ShaderManager staticShaderManager = null;
private static int currentProgram = -1;
private static boolean field_148000_e = true;
/** maps sampler names to their texture */
private final Map shaderSamplers = Maps.newHashMap();
private final List samplerNames = Lists.newArrayList();
private final List shaderSamplerLocations = Lists.newArrayList();
private final List shaderUniforms = Lists.newArrayList();
private final List shaderUniformLocations = Lists.newArrayList();
private final Map mappedShaderUniforms = Maps.newHashMap();
private final int program;
private final String programFilename;
private final boolean useFaceCulling;
private boolean isDirty;
private final JsonBlendingMode field_148016_p;
private final List field_148015_q;
private final List field_148014_r;
private final ShaderLoader vertexShaderLoader;
private final ShaderLoader fragmentShaderLoader;
private static final String __OBFID = "CL_00001040";
public ShaderManager(IResourceManager resourceManager, String programName) throws JsonException
{
JsonParser var3 = new JsonParser();
ResourceLocation var4 = new ResourceLocation("shaders/program/" + programName + ".json");
this.programFilename = programName;
InputStream var5 = null;
try
{
var5 = resourceManager.getResource(var4).getInputStream();
JsonObject var6 = var3.parse(IOUtils.toString(var5, Charsets.UTF_8)).getAsJsonObject();
String var7 = JsonUtils.getJsonObjectStringFieldValue(var6, "vertex");
String var28 = JsonUtils.getJsonObjectStringFieldValue(var6, "fragment");
JsonArray var9 = JsonUtils.getJsonObjectJsonArrayFieldOrDefault(var6, "samplers", (JsonArray)null);
if (var9 != null)
{
int var10 = 0;
for (Iterator var11 = var9.iterator(); var11.hasNext(); ++var10)
{
JsonElement var12 = (JsonElement)var11.next();
try
{
this.parseSampler(var12);
}
catch (Exception var25)
{
JsonException var14 = JsonException.func_151379_a(var25);
var14.func_151380_a("samplers[" + var10 + "]");
throw var14;
}
}
}
JsonArray var29 = JsonUtils.getJsonObjectJsonArrayFieldOrDefault(var6, "attributes", (JsonArray)null);
Iterator var32;
if (var29 != null)
{
int var30 = 0;
this.field_148015_q = Lists.newArrayListWithCapacity(var29.size());
this.field_148014_r = Lists.newArrayListWithCapacity(var29.size());
for (var32 = var29.iterator(); var32.hasNext(); ++var30)
{
JsonElement var13 = (JsonElement)var32.next();
try
{
this.field_148014_r.add(JsonUtils.getJsonElementStringValue(var13, "attribute"));
}
catch (Exception var24)
{
JsonException var15 = JsonException.func_151379_a(var24);
var15.func_151380_a("attributes[" + var30 + "]");
throw var15;
}
}
}
else
{
this.field_148015_q = null;
this.field_148014_r = null;
}
JsonArray var31 = JsonUtils.getJsonObjectJsonArrayFieldOrDefault(var6, "uniforms", (JsonArray)null);
if (var31 != null)
{
int var33 = 0;
for (Iterator var34 = var31.iterator(); var34.hasNext(); ++var33)
{
JsonElement var36 = (JsonElement)var34.next();
try
{
this.parseUniform(var36);
}
catch (Exception var23)
{
JsonException var16 = JsonException.func_151379_a(var23);
var16.func_151380_a("uniforms[" + var33 + "]");
throw var16;
}
}
}
this.field_148016_p = JsonBlendingMode.func_148110_a(JsonUtils.getJsonObjectFieldOrDefault(var6, "blend", (JsonObject)null));
this.useFaceCulling = JsonUtils.getJsonObjectBooleanFieldValueOrDefault(var6, "cull", true);
this.vertexShaderLoader = ShaderLoader.loadShader(resourceManager, ShaderLoader.ShaderType.VERTEX, var7);
this.fragmentShaderLoader = ShaderLoader.loadShader(resourceManager, ShaderLoader.ShaderType.FRAGMENT, var28);
this.program = ShaderLinkHelper.getStaticShaderLinkHelper().createProgram();
ShaderLinkHelper.getStaticShaderLinkHelper().linkProgram(this);
this.setupUniforms();
if (this.field_148014_r != null)
{
var32 = this.field_148014_r.iterator();
while (var32.hasNext())
{
String var35 = (String)var32.next();
int var37 = OpenGlHelper.glGetAttribLocation(this.program, var35);
this.field_148015_q.add(Integer.valueOf(var37));
}
}
}
catch (Exception var26)
{
JsonException var8 = JsonException.func_151379_a(var26);
var8.func_151381_b(var4.getResourcePath());
throw var8;
}
finally
{
IOUtils.closeQuietly(var5);
}
this.markDirty();
}
public void deleteShader()
{
ShaderLinkHelper.getStaticShaderLinkHelper().deleteShader(this);
}
public void endShader()
{
OpenGlHelper.glUseProgram(0);
currentProgram = -1;
staticShaderManager = null;
field_148000_e = true;
for (int var1 = 0; var1 < this.shaderSamplerLocations.size(); ++var1)
{
if (this.shaderSamplers.get(this.samplerNames.get(var1)) != null)
{
GlStateManager.setActiveTexture(OpenGlHelper.defaultTexUnit + var1);
GlStateManager.func_179144_i(0);
}
}
}
public void useShader()
{
this.isDirty = false;
staticShaderManager = this;
this.field_148016_p.func_148109_a();
if (this.program != currentProgram)
{
OpenGlHelper.glUseProgram(this.program);
currentProgram = this.program;
}
if (this.useFaceCulling)
{
GlStateManager.enableCull();
}
else
{
GlStateManager.disableCull();
}
for (int var1 = 0; var1 < this.shaderSamplerLocations.size(); ++var1)
{
if (this.shaderSamplers.get(this.samplerNames.get(var1)) != null)
{
GlStateManager.setActiveTexture(OpenGlHelper.defaultTexUnit + var1);
GlStateManager.func_179098_w();
Object var2 = this.shaderSamplers.get(this.samplerNames.get(var1));
int var3 = -1;
if (var2 instanceof Framebuffer)
{
var3 = ((Framebuffer)var2).framebufferTexture;
}
else if (var2 instanceof ITextureObject)
{
var3 = ((ITextureObject)var2).getGlTextureId();
}
else if (var2 instanceof Integer)
{
var3 = ((Integer)var2).intValue();
}
if (var3 != -1)
{
GlStateManager.func_179144_i(var3);
OpenGlHelper.glUniform1i(OpenGlHelper.glGetUniformLocation(this.program, (CharSequence)this.samplerNames.get(var1)), var1);
}
}
}
Iterator var4 = this.shaderUniforms.iterator();
while (var4.hasNext())
{
ShaderUniform var5 = (ShaderUniform)var4.next();
var5.upload();
}
}
public void markDirty()
{
this.isDirty = true;
}
/**
* gets a shader uniform for the name given. null if not found.
*/
public ShaderUniform getShaderUniform(String p_147991_1_)
{
return this.mappedShaderUniforms.containsKey(p_147991_1_) ? (ShaderUniform)this.mappedShaderUniforms.get(p_147991_1_) : null;
}
/**
* gets a shader uniform for the name given. if not found, returns a default not-null value
*/
public ShaderUniform getShaderUniformOrDefault(String p_147984_1_)
{
return (ShaderUniform)(this.mappedShaderUniforms.containsKey(p_147984_1_) ? (ShaderUniform)this.mappedShaderUniforms.get(p_147984_1_) : defaultShaderUniform);
}
/**
* goes through the parsed uniforms and samplers and connects them to their GL counterparts.
*/
private void setupUniforms()
{
int var1 = 0;
String var3;
int var4;
for (int var2 = 0; var1 < this.samplerNames.size(); ++var2)
{
var3 = (String)this.samplerNames.get(var1);
var4 = OpenGlHelper.glGetUniformLocation(this.program, var3);
if (var4 == -1)
{
logger.warn("Shader " + this.programFilename + "could not find sampler named " + var3 + " in the specified shader program.");
this.shaderSamplers.remove(var3);
this.samplerNames.remove(var2);
--var2;
}
else
{
this.shaderSamplerLocations.add(Integer.valueOf(var4));
}
++var1;
}
Iterator var5 = this.shaderUniforms.iterator();
while (var5.hasNext())
{
ShaderUniform var6 = (ShaderUniform)var5.next();
var3 = var6.getShaderName();
var4 = OpenGlHelper.glGetUniformLocation(this.program, var3);
if (var4 == -1)
{
logger.warn("Could not find uniform named " + var3 + " in the specified" + " shader program.");
}
else
{
this.shaderUniformLocations.add(Integer.valueOf(var4));
var6.setUniformLocation(var4);
this.mappedShaderUniforms.put(var3, var6);
}
}
}
private void parseSampler(JsonElement p_147996_1_)
{
JsonObject var2 = JsonUtils.getElementAsJsonObject(p_147996_1_, "sampler");
String var3 = JsonUtils.getJsonObjectStringFieldValue(var2, "name");
if (!JsonUtils.jsonObjectFieldTypeIsString(var2, "file"))
{
this.shaderSamplers.put(var3, (Object)null);
this.samplerNames.add(var3);
}
else
{
this.samplerNames.add(var3);
}
}
/**
* adds a shader sampler texture. if it already exists, replaces it.
*/
public void addSamplerTexture(String p_147992_1_, Object p_147992_2_)
{
if (this.shaderSamplers.containsKey(p_147992_1_))
{
this.shaderSamplers.remove(p_147992_1_);
}
this.shaderSamplers.put(p_147992_1_, p_147992_2_);
this.markDirty();
}
private void parseUniform(JsonElement p_147987_1_) throws JsonException
{
JsonObject var2 = JsonUtils.getElementAsJsonObject(p_147987_1_, "uniform");
String var3 = JsonUtils.getJsonObjectStringFieldValue(var2, "name");
int var4 = ShaderUniform.parseType(JsonUtils.getJsonObjectStringFieldValue(var2, "type"));
int var5 = JsonUtils.getJsonObjectIntegerFieldValue(var2, "count");
float[] var6 = new float[Math.max(var5, 16)];
JsonArray var7 = JsonUtils.getJsonObjectJsonArrayField(var2, "values");
if (var7.size() != var5 && var7.size() > 1)
{
throw new JsonException("Invalid amount of values specified (expected " + var5 + ", found " + var7.size() + ")");
}
else
{
int var8 = 0;
for (Iterator var9 = var7.iterator(); var9.hasNext(); ++var8)
{
JsonElement var10 = (JsonElement)var9.next();
try
{
var6[var8] = JsonUtils.getJsonElementFloatValue(var10, "value");
}
catch (Exception var13)
{
JsonException var12 = JsonException.func_151379_a(var13);
var12.func_151380_a("values[" + var8 + "]");
throw var12;
}
}
if (var5 > 1 && var7.size() == 1)
{
while (var8 < var5)
{
var6[var8] = var6[0];
++var8;
}
}
int var14 = var5 > 1 && var5 <= 4 && var4 < 8 ? var5 - 1 : 0;
ShaderUniform var15 = new ShaderUniform(var3, var4 + var14, var5, this);
if (var4 <= 3)
{
var15.set((int)var6[0], (int)var6[1], (int)var6[2], (int)var6[3]);
}
else if (var4 <= 7)
{
var15.func_148092_b(var6[0], var6[1], var6[2], var6[3]);
}
else
{
var15.set(var6);
}
this.shaderUniforms.add(var15);
}
}
public ShaderLoader getVertexShaderLoader()
{
return this.vertexShaderLoader;
}
public ShaderLoader getFragmentShaderLoader()
{
return this.fragmentShaderLoader;
}
public int getProgram()
{
return this.program;
}
}