diff --git a/include/render/textures.h b/include/render/textures.h index 767ed3d..ff1dcef 100644 --- a/include/render/textures.h +++ b/include/render/textures.h @@ -11,24 +11,34 @@ #include #include #include "stb/stb_image_resize.h" +#include +#include +#include +#include namespace fp::texture { - class texture { + class file_texture { private: std::string m_Name; std::string m_Path; int width = 0, height = 0, channels = 0; unsigned char* m_Data = nullptr; public: - texture(std::string name, std::string path): m_Name(std::move(name)), m_Path(std::move(path)) {} + /** + * @param path path to the texture file + * @param name reference name for this texture. If empty the texture will use path as its identifier + */ + explicit file_texture(const std::string& path, const std::string& name = ""): m_Name(name.empty() ? path : name), m_Path(path) {} - static texture* load(texture* texture) { + static file_texture* load(file_texture* texture) { stbi_load(texture->m_Path.c_str(), &texture->width, &texture->height, &texture->channels, 4); return texture; } - static texture* resize(texture* texture, int target_width, int target_height) { + static file_texture* resize(file_texture* texture, int target_width, int target_height) { + if (target_width == texture->width && target_height == texture->height) + return texture; // since stb is a c lib we must use malloc, otherwise we'd have to deal with using the right free on destruction auto* output_Data = (unsigned char*) malloc(target_width * target_height * texture->channels); @@ -36,7 +46,7 @@ namespace fp::texture { texture->m_Data, texture->width, texture->height, texture->width * texture->channels, output_Data, target_width, target_height, target_width * texture->channels, texture->channels ); - + stbi_image_free(texture->m_Data); texture->m_Data = output_Data; texture->width = target_width; @@ -47,23 +57,145 @@ namespace fp::texture { return m_Data; } - ~texture() { + [[nodiscard]] const std::string& getName() { + return m_Name; + } + + ~file_texture() { stbi_image_free(m_Data); } }; + struct gl_texture { + protected: + unsigned int textureID = 0; + GLint textureBindType; + GLint textureColorMode; + int m_width, m_height; + + gl_texture(int width, int height, GLint bind_type = GL_TEXTURE_2D, GLint color_mode = GL_RGBA): + m_width(width), m_height(height), textureBindType(bind_type), textureColorMode(color_mode) { + glGenTextures(1, &textureID); + } + public: + void bind() const { + glBindTexture(textureBindType, textureID); + } + + void unbind() const { + glBindTexture(textureBindType, 0); + } + + void setDefaults() const { + bind(); + glTexParameteri(textureBindType, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameteri(textureBindType, GL_TEXTURE_WRAP_T, GL_REPEAT); + // nearest preserves the pixely look + glTexParameteri(textureBindType, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(textureBindType, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + unbind(); + } + + void generateMipmaps() const { + // it's a little inefficient binding and unbinding for these small calls, they really should be done in the constructor or data upload + bind(); + glGenerateMipmap(textureBindType); + unbind(); + } + + [[nodiscard]] unsigned int getTextureID() const { + return textureID; + } + + ~gl_texture() { + glDeleteTextures(1, &textureID); + } + }; + + struct gl_texture2D : public gl_texture { + public: + gl_texture2D(int width, int height, GLint colorMode = GL_RGBA): gl_texture(width, height, GL_TEXTURE_2D, colorMode) { + bind(); + glTexStorage2D(textureBindType, std::stoi(fp::settings::get("MIPMAP_LEVELS")), colorMode, width, height); + } + + void upload(void* data, int level = 0, int x_offset = 0, int y_offset = 0, int sub_width = -1, int sub_height = -1) const { + if (sub_width < 0) + sub_width = m_width; + if (sub_height < 0) + sub_height = m_height; + glTexSubImage2D(textureBindType, level, x_offset, y_offset, sub_width, sub_height, textureColorMode, GL_UNSIGNED_BYTE, data); + } + }; + + struct gl_texture2D_array : public gl_texture { + protected: + int m_layers; + public: + gl_texture2D_array(int width, int height, int layers, GLint colorMode = GL_RGBA): + gl_texture(width, height, GL_TEXTURE_2D_ARRAY, colorMode), m_layers(layers) { + bind(); + glTexStorage3D(textureBindType, std::stoi(fp::settings::get("MIPMAP_LEVELS")), colorMode, width, height, layers); + } + + void upload(void* data, int index, int level = 0, int x_offset = 0, int y_offset = 0, int sub_width = -1, int sub_height = -1) const { + if (sub_width < 0) + sub_width = m_width; + if (sub_height < 0) + sub_height = m_height; + glTexSubImage3D(textureBindType, level, x_offset, y_offset, index, sub_width, sub_height, 1, textureColorMode, GL_UNSIGNED_BYTE, data); + } + }; + class palette { private: + union negDInt { + int i = -1; + }; // as of GL3.0 this limit is 256. (4.5 extends it to 2048.) static constexpr int MAX_ARRAY_LAYERS = 256; + + gl_texture2D_array* texture_array = nullptr; - int m_CurrentTextureCount = 0; - unsigned int textureID = 0; + std::unordered_map textureIndices; + std::vector textures; public: - palette() { + palette() = default; + void generateGLTexture() { + delete texture_array; + auto texture_size = std::stoi(fp::settings::get("TEXTURE_SIZE")); + texture_array = new gl_texture2D_array(texture_size, texture_size, (int)textures.size()); + for (const auto t : textures) + texture_array->upload(t->data(), textureIndices[t->getName()].i); + texture_array->setDefaults(); + texture_array->generateMipmaps(); } + + void registerTexture(file_texture* texture) { + auto texture_size = std::stoi(fp::settings::get("TEXTURE_SIZE")); + texture = file_texture::resize(texture, texture_size, texture_size); + + textureIndices[texture->getName()].i = (int) textures.size(); + textures.push_back(texture); + } + + bool hasTexture(const std::string& name) { + return textureIndices[name].i >= 0; + } + + int getTexture(const std::string& name) { + return textureIndices[name].i; + } + + unsigned int getTextureID() { + return texture_array->getTextureID(); + } + + ~palette() { + delete texture_array; + }; }; diff --git a/libraries/BLT b/libraries/BLT index b95359a..d72441f 160000 --- a/libraries/BLT +++ b/libraries/BLT @@ -1 +1 @@ -Subproject commit b95359a3111eb332fd5f651ec4ae13fead1b6f59 +Subproject commit d72441f1703fa44d397b960e4e9e761f07786505 diff --git a/src/render/textures.cpp b/src/render/textures.cpp index 5026f2b..9967ce4 100644 --- a/src/render/textures.cpp +++ b/src/render/textures.cpp @@ -5,4 +5,4 @@ */ #define STB_IMAGE_IMPLEMENTATION #define STB_IMAGE_RESIZE_IMPLEMENTATION -#include \ No newline at end of file +#include diff --git a/src/util/settings.cpp b/src/util/settings.cpp index f51a38d..c5f27d2 100644 --- a/src/util/settings.cpp +++ b/src/util/settings.cpp @@ -14,6 +14,7 @@ std::unordered_map properties; // will be overwritten if the file has something different. void write_default_values(){ properties["TEXTURE_SIZE"] = std::to_string(32); + properties["MIPMAP_LEVELS"] = std::to_string(3); } void fp::settings::load(const std::string& file) {