JNIEXPORT void JNICALL Java_org_lwjgl_opengl_GL42_nglGetInternalformativ__IIIIJ(JNIEnv *__env, jclass clazz, jint target, jint internalformat, jint pname, jint bufSize, jlong paramsAddress) {
glGetInternalformativPROC glGetInternalformativ = (glGetInternalformativPROC)tlsGetFunction(869);
intptr_t params = (intptr_t)paramsAddress;
UNUSED_PARAM(clazz)
glGetInternalformativ(target, internalformat, pname, bufSize, params);
}
// ------------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------------
// ------------------------------------------------------------------------------------------------
Texture2DContainer::Texture2DContainer(bool sparse, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height, GLsizei slices)
: mHandle(0)
, mWidth(width)
, mHeight(height)
, mLevels(levels)
, mSlices(slices)
, mXTileSize(0)
, mYTileSize(0)
{
glGenTextures(1, &mTexId);
glBindTexture(GL_TEXTURE_2D_ARRAY, mTexId);
if (sparse) {
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SPARSE_ARB, GL_TRUE);
// TODO: This could be done once per internal format. For now, just do it every time.
GLint indexCount = 0,
xSize = 0,
ySize = 0,
zSize = 0;
GLint bestIndex = -1,
bestXSize = 0,
bestYSize = 0;
glGetInternalformativ(GL_TEXTURE_2D_ARRAY, internalformat, GL_NUM_VIRTUAL_PAGE_SIZES_ARB, 1, &indexCount);
for (GLint i = 0; i < indexCount; ++i) {
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_VIRTUAL_PAGE_SIZE_INDEX_ARB, i);
glGetInternalformativ(GL_TEXTURE_2D_ARRAY, internalformat, GL_VIRTUAL_PAGE_SIZE_X_ARB, 1, &xSize);
glGetInternalformativ(GL_TEXTURE_2D_ARRAY, internalformat, GL_VIRTUAL_PAGE_SIZE_Y_ARB, 1, &ySize);
glGetInternalformativ(GL_TEXTURE_2D_ARRAY, internalformat, GL_VIRTUAL_PAGE_SIZE_Z_ARB, 1, &zSize);
// For our purposes, the "best" format is the one that winds up with Z=1 and the largest x and y sizes.
if (zSize == 1) {
if (xSize >= bestXSize && ySize >= bestYSize) {
bestIndex = i;
bestXSize = xSize;
bestYSize = ySize;
}
}
}
// This would mean the implementation has no valid sizes for us, or that this format doesn't actually support sparse
// texture allocation. Need to implement the fallback. TODO: Implement that.
assert(bestIndex != -1);
mXTileSize = bestXSize;
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_VIRTUAL_PAGE_SIZE_INDEX_ARB, bestIndex);
}
// We've set all the necessary parameters, now it's time to create the sparse texture.
glTexStorage3D(GL_TEXTURE_2D_ARRAY, levels, internalformat, width, height, mSlices);
for (GLsizei i = 0; i < mSlices; ++i) {
mFreeList.push(i);
}
if (sparse) {
mHandle = glGetTextureHandleARB(mTexId);
assert(mHandle != 0);
glMakeTextureHandleResidentARB(mHandle);
}
}
