migrate ALMOST everything from source tree into client

source/client/renderer/Textures.cpp

@@ -0,0 +1,166 @@
+/********************************************************************
+	Minecraft: Pocket Edition - Decompilation Project
+	Copyright (C) 2023 iProgramInCpp
+	
+	The following code is licensed under the BSD 1 clause license.
+	SPDX-License-Identifier: BSD-1-Clause
+ ********************************************************************/
+
+#include "Textures.hpp"
+
+bool Textures::MIPMAP = false;
+
+int Textures::loadTexture(const std::string& name, bool b)
+{
+	auto i = m_textures.find(name);
+	if (i != m_textures.end())
+		return i->second;
+
+	Texture t = m_pPlatform->loadTexture(name, b);
+
+	int result = -1;
+	if (t.m_pixels)
+		result = assignTexture(name, t);
+
+	return result;
+}
+
+int Textures::assignTexture(const std::string& name, Texture& texture)
+{
+	GLuint textureID = 0;
+
+	glGenTextures(1, &textureID);
+	if (textureID != m_currBoundTex)
+	{
+		glBindTexture(GL_TEXTURE_2D, textureID);
+		m_currBoundTex = textureID;
+	}
+
+	if (MIPMAP)
+	{
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	}
+	else
+	{
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	}
+
+	if (field_39)
+	{
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	}
+
+	if (field_38)
+	{
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	}
+	else
+	{
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	}
+
+	GLuint internalFormat = GL_RGB;
+
+	if (texture.field_C)
+		internalFormat = GL_RGBA;
+
+	glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, texture.m_width, texture.m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture.m_pixels);
+
+	m_textures[name] = textureID;
+
+	m_textureData[textureID] = TextureData(textureID, texture);
+
+	return textureID;
+}
+
+void Textures::clear()
+{
+	// note: Textures::clear() does not touch the dynamic textures vector
+
+	for (auto x : m_textures)
+		glDeleteTextures(1, &x.second);
+
+	for (auto x : m_textureData)
+		delete[] x.second.textureData.m_pixels;
+
+	m_textures.clear();
+	m_textureData.clear();
+}
+
+Textures::Textures(Options* pOptions, AppPlatform* pAppPlatform)
+{
+	m_pPlatform = pAppPlatform;
+	m_pOptions = pOptions;
+	m_currBoundTex = -1;
+}
+
+Textures::~Textures()
+{
+	clear();
+
+	for (auto x : m_dynamicTextures)
+		delete x;
+
+	m_dynamicTextures.clear();
+}
+
+void Textures::tick()
+{
+	// tick dynamic textures here
+	for (auto pDynaTex : m_dynamicTextures)
+	{
+		pDynaTex->bindTexture(this);
+		pDynaTex->tick();
+
+		for (int x = 0; x < pDynaTex->m_textureSize; x++)
+		{
+			for (int y = 0; y < pDynaTex->m_textureSize; y++)
+			{
+				// texture is already bound so this is fine:
+				glTexSubImage2D(
+					GL_TEXTURE_2D,
+					0,
+					16 * (x + pDynaTex->m_textureIndex % 16),
+					16 * (y + pDynaTex->m_textureIndex / 16),
+					16, 16,
+					GL_RGBA,
+					GL_UNSIGNED_BYTE,
+					pDynaTex->m_pixels
+				);
+			}
+		}
+	}
+}
+
+int Textures::loadAndBindTexture(const std::string& name)
+{
+	int id = loadTexture(name, true);
+
+	if (m_currBoundTex != id)
+	{
+		m_currBoundTex = id;
+		glBindTexture(GL_TEXTURE_2D, id);
+	}
+
+	return id;
+}
+
+void Textures::addDynamicTexture(DynamicTexture* pTexture)
+{
+	m_dynamicTextures.push_back(pTexture);
+	pTexture->tick();
+}
+
+Texture* Textures::getTemporaryTextureData(GLuint id)
+{
+	auto i = m_textureData.find(id);
+	if (i == m_textureData.end())
+		return nullptr;
+
+	return &i->second.textureData;
+}