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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "LuaTextures.h"
#include "System/Util.h"
/******************************************************************************/
/******************************************************************************/
LuaTextures::LuaTextures()
{
lastCode = 0;
}
LuaTextures::~LuaTextures()
{
map<string, Texture>::iterator it;
for (it = textures.begin(); it != textures.end(); ++it) {
const Texture& tex = it->second;
glDeleteTextures(1, &tex.id);
if (GLEW_EXT_framebuffer_object) {
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
}
}
textures.clear();
}
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();
glTexImage2D(tex.target, 0, tex.format,
tex.xsize, tex.ysize, tex.border,
dataFormat, dataType, NULL);
const GLenum err = glGetError();
if (err != GL_NO_ERROR) {
glDeleteTextures(1, &texID);
glBindTexture(GL_TEXTURE_2D, currentBinding);
return string("");
}
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) {
static GLfloat maxAniso = -1.0f;
if (maxAniso == -1.0f) {
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxAniso);
}
const GLfloat aniso = std::max(1.0f, std::min(maxAniso, tex.aniso));
glTexParameterf(tex.target, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);
}
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 string("");
}
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 string("");
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, currentFBO);
}
lastCode++;
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;
textures[newTex.name] = newTex;
return newTex.name;
}
bool LuaTextures::Bind(const string& name) const
{
map<string, Texture>::const_iterator it = textures.find(name);
if (it != textures.end()) {
const Texture& tex = it->second;
glBindTexture(tex.target, tex.id);
return true;
}
return false;
}
bool LuaTextures::Free(const string& name)
{
map<string, Texture>::iterator it = textures.find(name);
if (it != textures.end()) {
const Texture& tex = it->second;
glDeleteTextures(1, &tex.id);
if (GLEW_EXT_framebuffer_object) {
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
}
textures.erase(it);
return true;
}
return false;
}
bool LuaTextures::FreeFBO(const string& name)
{
if (!GLEW_EXT_framebuffer_object) {
return false;
}
map<string, Texture>::iterator it = textures.find(name);
if (it == textures.end()) {
return false;
}
Texture& tex = it->second;
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
tex.fbo = 0;
tex.fboDepth = 0;
return true;
}
void LuaTextures::FreeAll()
{
map<string, Texture>::iterator it;
for (it = textures.begin(); it != textures.end(); ++it) {
const Texture& tex = it->second;
glDeleteTextures(1, &tex.id);
if (GLEW_EXT_framebuffer_object) {
glDeleteFramebuffersEXT(1, &tex.fbo);
glDeleteRenderbuffersEXT(1, &tex.fboDepth);
}
}
textures.clear();
}
const LuaTextures::Texture* LuaTextures::GetInfo(const string& name) const
{
map<string, Texture>::const_iterator it = textures.find(name);
if (it != textures.end()) {
return &(it->second);
}
return NULL;
}
/******************************************************************************/
/******************************************************************************/
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