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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/SpringMath.h"
#include "System/StringUtil.h"
#include "System/Log/ILog.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);
glClearErrors("LuaTex", __func__, globalRendering->glDebugErrors);
GLenum dataFormat = GL_RGBA;
GLenum dataType = GL_UNSIGNED_BYTE;
switch (tex.format) {
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
case GL_DEPTH_COMPONENT32F: {
dataFormat = GL_DEPTH_COMPONENT;
dataType = GL_FLOAT;
} break;
default: {
} break;
}
switch (tex.target) {
case GL_TEXTURE_2D_MULTISAMPLE: {
assert(tex.samples > 1);
glTexImage2DMultisample(tex.target, tex.samples, tex.format, tex.xsize, tex.ysize, GL_TRUE);
} break;
case GL_TEXTURE_2D: {
glTexImage2D(tex.target, 0, tex.format, tex.xsize, tex.ysize, tex.border, dataFormat, dataType, nullptr);
} break;
default: {
LOG_L(L_ERROR, "[LuaTextures::%s] texture-target %d is not supported yet", __func__, tex.target);
} break;
}
if (glGetError() != GL_NO_ERROR) {
glDeleteTextures(1, &texID);
glBindTexture(GL_TEXTURE_2D, currentBinding);
return "";
}
ApplyParams(tex);
glBindTexture(GL_TEXTURE_2D, currentBinding); // revert the current binding
GLuint fbo = 0;
GLuint fboDepth = 0;
if (tex.fbo != 0) {
GLint currentFBO;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, ¤tFBO);
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
if (tex.fboDepth != 0) {
glGenRenderbuffers(1, &fboDepth);
glBindRenderbuffer(GL_RENDERBUFFER, fboDepth);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, tex.xsize, tex.ysize);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, fboDepth);
}
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex.target, texID, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
glDeleteTextures(1, &texID);
glDeleteFramebuffers(1, &fbo);
glDeleteRenderbuffers(1, &fboDepth);
glBindFramebuffer(GL_FRAMEBUFFER, currentFBO);
return "";
}
glBindFramebuffer(GL_FRAMEBUFFER, currentFBO);
}
char buf[64];
SNPRINTF(buf, sizeof(buf), "%c%i", prefix, ++lastCode);
Texture newTex = tex;
newTex.id = texID;
newTex.fbo = fbo;
newTex.fboDepth = fboDepth;
if (freeIndices.empty()) {
textureMap.insert(buf, textureVec.size());
textureVec.emplace_back(newTex);
return buf;
}
// recycle
textureMap[buf] = freeIndices.back();
textureVec[freeIndices.back()] = newTex;
freeIndices.pop_back();
return buf;
}
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);
glDeleteFramebuffers(1, &tex.fbo);
glDeleteRenderbuffers(1, &tex.fboDepth);
freeIndices.push_back(it->second);
textureMap.erase(it);
return true;
}
return false;
}
bool LuaTextures::FreeFBO(const std::string& name)
{
const auto it = textureMap.find(name);
if (it == textureMap.end())
return false;
Texture& tex = textureVec[it->second];
glDeleteFramebuffers(1, &tex.fbo);
glDeleteRenderbuffers(1, &tex.fboDepth);
tex.fbo = 0;
tex.fboDepth = 0;
return true;
}
void LuaTextures::FreeAll()
{
for (const auto& item: textureMap) {
const Texture& tex = textureVec[item.second];
glDeleteTextures(1, &tex.id);
glDeleteFramebuffers(1, &tex.fbo);
glDeleteRenderbuffers(1, &tex.fboDepth);
}
textureMap.clear();
textureVec.clear();
freeIndices.clear();
}
void LuaTextures::ApplyParams(const Texture& tex) const
{
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, GL_NONE);
if (tex.aniso != 0.0f)
glTexParameterf(tex.target, GL_TEXTURE_MAX_ANISOTROPY_EXT, Clamp(tex.aniso, 1.0f, globalRendering->maxTexAnisoLvl));
}
void LuaTextures::ChangeParams(const Texture& tex) const
{
GLint currentBinding = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, ¤tBinding);
glBindTexture(tex.target, tex.id);
ApplyParams(tex);
glBindTexture(GL_TEXTURE_2D, currentBinding); // revert the current binding
}
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));
}
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