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Cache all mipmap levels for compressed texture

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Not sure if devee has super-fast loading speed like me
This commit is contained in:
Benau 2017-09-06 15:14:36 +08:00
parent ee3d0df242
commit 88972f8308
1 changed files with 64 additions and 15 deletions
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79
src/graphics/stk_texture.cpp
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@ -32,7 +32,7 @@
#include <functional>
#if !defined(USE_GLES2)
static const uint8_t CACHE_VERSION = 1;
static const uint8_t CACHE_VERSION = 2;
#endif
// ----------------------------------------------------------------------------
STKTexture::STKTexture(const std::string& path, TexConfig* tc, bool no_upload)
@ -443,10 +443,10 @@ bool STKTexture::loadCompressedTexture(const std::string& file_name)
ifs.read((char*)&cache_verison, sizeof(uint8_t));
if (cache_verison != CACHE_VERSION)
{
Log::warn("STKTexture", "%s version %d is not supported!",
Log::debug("STKTexture", "%s version %d is not supported!",
file_name.c_str(), cache_verison);
ifs.close();
// Remove the file later if we have more version
std::remove(file_name.c_str());
return false;
}
ifs.read((char*)&internal_format, sizeof(int));
@ -459,8 +459,9 @@ bool STKTexture::loadCompressedTexture(const std::string& file_name)
if (ifs.fail() || m_texture_size == 0)
return false;
char *data = new char[m_texture_size];
ifs.read(data, m_texture_size);
std::vector<char> compressed;
compressed.resize(m_texture_size);
ifs.read(compressed.data(), m_texture_size);
if (!ifs.fail())
{
// No on the fly reload is supported for compressed texture
@ -475,14 +476,38 @@ bool STKTexture::loadCompressedTexture(const std::string& file_name)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_RED);
}
glCompressedTexImage2D(GL_TEXTURE_2D, 0, internal_format,
m_size.Width, m_size.Height, 0, m_texture_size, (GLvoid*)data);
glGenerateMipmap(GL_TEXTURE_2D);
m_size.Width, m_size.Height, 0, m_texture_size, compressed.data());
unsigned width = m_size.Width;
unsigned height = m_size.Height;
std::vector<std::pair<unsigned, unsigned> > mipmap_sizes;
while (true)
{
width = width < 2 ? 1 : width >> 1;
height = height < 2 ? 1 : height >> 1;
mipmap_sizes.emplace_back(width, height);
if (width == 1 && height == 1)
break;
}
for (unsigned i = 0; i < mipmap_sizes.size(); i++)
{
unsigned cur_mipmap_size = 0;
ifs.read((char*)&cur_mipmap_size, sizeof(unsigned int));
ifs.read(compressed.data(), cur_mipmap_size);
if (cur_mipmap_size == 0 || ifs.fail())
{
ifs.close();
std::remove(file_name.c_str());
return false;
}
glCompressedTexImage2D(GL_TEXTURE_2D, i + 1, internal_format,
mipmap_sizes[i].first, mipmap_sizes[i].second, 0,
cur_mipmap_size, compressed.data());
}
glBindTexture(GL_TEXTURE_2D, 0);
delete[] data;
ifs.close();
return true;
}
delete[] data;
ifs.close();
std::remove(file_name.c_str());
#endif
return false;
} // loadCompressedTexture
@ -515,8 +540,9 @@ void STKTexture::saveCompressedTexture(const std::string& compressed_tex)
GL_TEXTURE_COMPRESSED_IMAGE_SIZE, (GLint *)&m_texture_size);
if (m_texture_size == 0) return;
char *data = new char[m_texture_size];
glGetCompressedTexImage(GL_TEXTURE_2D, 0, (GLvoid*)data);
std::vector<char> compressed;
compressed.resize(m_texture_size);
glGetCompressedTexImage(GL_TEXTURE_2D, 0, compressed.data());
std::ofstream ofs(compressed_tex.c_str(),
std::ios::out | std::ios::binary);
if (ofs.is_open())
@ -528,10 +554,33 @@ void STKTexture::saveCompressedTexture(const std::string& compressed_tex)
ofs.write((char*)&m_orig_size.Width, sizeof(unsigned int));
ofs.write((char*)&m_orig_size.Height, sizeof(unsigned int));
ofs.write((char*)&m_texture_size, sizeof(unsigned int));
ofs.write(data, m_texture_size);
ofs.close();
ofs.write(compressed.data(), m_texture_size);
unsigned width = m_size.Width;
unsigned height = m_size.Height;
std::vector<std::pair<unsigned, unsigned> > mipmap_sizes;
while (true)
{
width = width < 2 ? 1 : width >> 1;
height = height < 2 ? 1 : height >> 1;
mipmap_sizes.emplace_back(width, height);
if (width == 1 && height == 1)
break;
}
for (unsigned i = 0; i < mipmap_sizes.size(); i++)
{
GLint cur_mipmap_size = 0;
glGetTexLevelParameteriv(GL_TEXTURE_2D, i + 1,
GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &cur_mipmap_size);
if (cur_mipmap_size == 0)
{
ofs.close();
std::remove(compressed_tex.c_str());
}
glGetCompressedTexImage(GL_TEXTURE_2D, i + 1, compressed.data());
ofs.write((char*)&cur_mipmap_size, sizeof(unsigned int));
ofs.write(compressed.data(), cur_mipmap_size);
}
}
delete[] data;
#endif
} // saveCompressedTexture