bool initTexture()
{
gli::texture2D Texture(gli::loadStorageDDS(glf::DATA_DIRECTORY + TEXTURE_DIFFUSE));
assert(!Texture.empty());
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
GLsizei const Size(4096);
glGenTextures(1, &TextureName);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, TextureName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_R, GL_RED);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_G, GL_GREEN);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_B, GL_BLUE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_ALPHA);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, GLint(glm::log2(4096.f)) - GLint(glm::log2(256.f)));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
//glTexStorage2D(GL_TEXTURE_2D, GLint(glm::log2(4096.f)), GL_RGBA8, GLsizei(Size), GLsizei(Size));
glTextureStorageSparseAMD(TextureName, GL_TEXTURE_2D, GL_RGBA8, Size, Size, GLsizei(1), GLsizei(1), GL_TEXTURE_STORAGE_SPARSE_BIT_AMD);
GLint PageSizeX(0);
GLint PageSizeY(0);
GLint PageSizeZ(0);
glGetInternalformativ(GL_TEXTURE_2D, GL_RGBA8, GL_VIRTUAL_PAGE_SIZE_X_AMD, 1, &PageSizeX);
glGetInternalformativ(GL_TEXTURE_2D, GL_RGBA8, GL_VIRTUAL_PAGE_SIZE_Y_AMD, 1, &PageSizeY);
glGetInternalformativ(GL_TEXTURE_2D, GL_RGBA8, GL_VIRTUAL_PAGE_SIZE_Z_AMD, 1, &PageSizeZ);
for(std::size_t Level = 0; Level < GLint(glm::log2(256.f)); ++Level)
{
GLsizei const Width = (Size >> Level) / Texture[0].dimensions().x;
GLsizei const Height = (Size >> Level) / Texture[0].dimensions().y;
for(GLsizei j = 0; j < Height; ++j)
for(GLsizei i = 0; i < Width; ++i)
{
if(i % 2 && j % 2)
continue;
glTexSubImage2D(
GL_TEXTURE_2D,
GLint(Level),
i * GLsizei(Texture[0].dimensions().x),
j * GLsizei(Texture[0].dimensions().y),
GLsizei(Texture[0].dimensions().x),
GLsizei(Texture[0].dimensions().y),
GL_BGR, GL_UNSIGNED_BYTE,
Texture[0].data());
}
}
//glGenerateMipmap(GL_TEXTURE_2D);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
return true;
}
JNIEXPORT void JNICALL Java_org_lwjgl_opengl_AMDSparseTexture_glTextureStorageSparseAMD(JNIEnv *__env, jclass clazz, jint texture, jint target, jint internalFormat, jint width, jint height, jint depth, jint layers, jint flags) {
glTextureStorageSparseAMDPROC glTextureStorageSparseAMD = (glTextureStorageSparseAMDPROC)tlsGetFunction(1073);
UNUSED_PARAM(clazz)
glTextureStorageSparseAMD(texture, target, internalFormat, width, height, depth, layers, flags);
}
