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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "LuaTextures.h"
#include "Rendering/GlobalRendering.h"
#include "System/myMath.h"
#include "System/StringUtil.h"
/******************************************************************************/
/******************************************************************************/
std::string LuaTextures::Create(const Texture& tex)
{
GLint currentBinding;
glGetIntegerv(GL_TEXTURE_BINDING_2D, ¤tBinding);
GLuint texID;
glGenTextures(1, &texID);
glBindTexture(tex.target, texID);
GLenum dataFormat = GL_RGBA;
GLenum dataType = GL_UNSIGNED_BYTE;
if ((tex.format == GL_DEPTH_COMPONENT) ||
(tex.format == GL_DEPTH_COMPONENT16) ||
(tex.format == GL_DEPTH_COMPONENT24) ||
(tex.format == GL_DEPTH_COMPONENT32)) {
dataFormat = GL_DEPTH_COMPONENT;
dataType = GL_FLOAT;
}
glClearErrors("LuaTex", __func__, globalRendering->glDebugErrors);
glTexImage2D(tex.target, 0, tex.format,
tex.xsize, tex.ysize, tex.border,
dataFormat, dataType, nullptr);
if (glGetError() != GL_NO_ERROR) {
glDeleteTextures(1, &texID);
glBindTexture(GL_TEXTURE_2D, currentBinding);
return "";
}
glTexParameteri(tex.target, GL_TEXTURE_WRAP_S, tex.wrap_s);
glTexParameteri(tex.target, GL_TEXTURE_WRAP_T, tex.wrap_t);
glTexParameteri(tex.target, GL_TEXTURE_WRAP_R, tex.wrap_r);
glTexParameteri(tex.target, GL_TEXTURE_MIN_FILTER, tex.min_filter);
glTexParameteri(tex.target, GL_TEXTURE_MAG_FILTER, tex.mag_filter);
glTexParameteri(tex.target, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);
if ((tex.aniso != 0.0f) && GLEW_EXT_texture_filter_anisotropic)
glTexParameterf(tex.target, GL_TEXTURE_MAX_ANISOTROPY_EXT, Clamp(tex.aniso, 1.0f, globalRendering->maxTexAnisoLvl));
glBindTexture(GL_TEXTURE_2D, currentBinding); // revert the current binding
GLuint fbo = 0;
GLuint fboDepth = 0;
if (tex.fbo != 0) {
if (!GLEW_EXT_framebuffer_object) {
glDeleteTextures(1, &texID);
return "";
}
GLint currentFBO;
glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, ¤tFBO);
glGenFramebuffersEXT(1, &fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
if (tex.fboDepth != 0) {
glGenRenderbuffersEXT(1, &fboDepth);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fboDepth);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24,
tex.xsize, tex.ysize);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, fboDepth);
}
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
tex.target, texID, 0);
const GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
glDeleteTextures(1, &texID);
glDeleteFramebuffersEXT(1, &fbo);
glDeleteRenderbuffersEXT(1, &fboDepth);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, currentFBO);
return "";
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, currentFBO);
}
char buf[64];
SNPRINTF(buf, sizeof(buf), "%c%i", prefix, ++lastCode);
Texture newTex = tex;
newTex.id = texID;
newTex.name = buf;
newTex.fbo = fbo;
newTex.fboDepth = fboDepth;
if (freeIndices.empty()) {
textureMap[newTex.name] = textureVec.size();
textureVec.push_back(newTex);
} else {
// recycle
textureMap[newTex.name] = freeIndices.back();
textureVec[freeIndices.back()] = newTex;
freeIndices.pop_back();
}
return newTex.name;
}
bool LuaTextures::Bind(const std::string& name) const
{
const auto it = textureMap.find(name);
if (it != textureMap.end()) {
const Texture& tex = textureVec[it->second];
glBindTexture(tex.target, tex.id);
return true;
}
return false;
}
bool LuaTextures::Free(const std::string& name)
{
const auto it = textureMap.find(name);
if (it != textureMap.end()) {
const Texture& tex = textureVec[it->second];
glDeleteTextures(1, &tex.id);
if (GLEW_EXT_framebuffer_object) {
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
}
freeIndices.push_back(it->second);
textureMap.erase(it);
return true;
}
return false;
}
bool LuaTextures::FreeFBO(const std::string& name)
{
if (!GLEW_EXT_framebuffer_object)
return false;
const auto it = textureMap.find(name);
if (it == textureMap.end())
return false;
Texture& tex = textureVec[it->second];
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
tex.fbo = 0;
tex.fboDepth = 0;
return true;
}
void LuaTextures::FreeAll()
{
for (auto it = textureMap.begin(); it != textureMap.end(); ++it) {
const Texture& tex = textureVec[it->second];
glDeleteTextures(1, &tex.id);
if (GLEW_EXT_framebuffer_object) {
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
}
}
textureMap.clear();
textureVec.clear();
freeIndices.clear();
}
size_t LuaTextures::GetIdx(const std::string& name) const
{
const auto it = textureMap.find(name);
if (it != textureMap.end())
return (it->second);
return (size_t(-1));
}
const LuaTextures::Texture* LuaTextures::GetInfo(const std::string& name) const
{
const size_t idx = GetIdx(name);
if (idx != size_t(-1))
return &textureVec[idx];
return nullptr;
}
/******************************************************************************/
/******************************************************************************/
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